Base de dados : MEDLINE
Pesquisa : B01.650.940.800.575.912.250.822.151 [Categoria DeCS]
Referências encontradas : 30 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 3 ir para página          

  1 / 30 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28422495
[Au] Autor:Masi M; Meyer S; Clement S; Cimmino A; Cristofaro M; Evidente A
[Ad] Endereço:Department of Chemical Sciences, University of Naples "Federico II", Complesso Universitario Monte S. Angelo , Via Cintia 4, 80126 Napoli, Italy.
[Ti] Título:Cochliotoxin, a Dihydropyranopyran-4,5-dione, and Its Analogues Produced by Cochliobolus australiensis Display Phytotoxic Activity against Buffelgrass (Cenchrus ciliaris).
[So] Source:J Nat Prod;80(5):1241-1247, 2017 May 26.
[Is] ISSN:1520-6025
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Buffelgrass (Pennisetum ciliare or Cenchrus ciliaris) is a perennial grass that has become highly invasive in the Sonoran Desert of southern Arizona. In the search for novel control strategies against this weed, strains of the foliar fungal pathogen Cochliobolus australiensis from buffelgrass have been screened for their ability to produce phytotoxic metabolites that could potentially be used as natural herbicides in an integrated pest management strategy. A new phytotoxin, named cochliotoxin, was isolated from liquid culture of this fungus together with radicinin, radicinol, and their 3-epimers. Cochliotoxin was characterized, essentially by spectroscopic methods, as 3-hydroxy-2-methyl-7-(3-methyloxiranyl)-2,3-dihydropyrano[4,3-b]pyran-4,5-dione. Its relative stereochemistry was assigned by H NMR techniques, while the absolute configuration (2S,3S) was determined applying the advanced Mosher's method by esterification of its hydroxy group at C-3. When bioassayed in a buffelgrass coleoptile elongation test and by leaf puncture bioassay against the host weed and two nontarget grasses, cochliotoxin showed strong phytotoxicity. In the same tests, radicinin and 3-epi-radicinin also showed phytotoxic activity, while radicinol and 3-epi-radicinol were largely inactive. All five compounds were more active in leaf puncture bioassays on buffelgrass than on the nontarget grass tanglehead (Heteropogon contortus), while the nontarget grass Arizona cottontop (Digitaria californica) was more sensitive to radicinin and 3-epi-radicinin. Cochliotoxin at low concentration was significantly more active on buffelgrass than on either native grass, but the difference was small.
[Mh] Termos MeSH primário: Ascomicetos/química
Cenchrus/química
Herbicidas/isolamento & purificação
Herbicidas/farmacologia
Fungos Mitospóricos/isolamento & purificação
Micotoxinas/isolamento & purificação
Micotoxinas/farmacologia
Folhas de Planta/química
Poaceae/química
Pironas/química
Pironas/isolamento & purificação
Pironas/farmacologia
[Mh] Termos MeSH secundário: Arizona
Ascomicetos/isolamento & purificação
Herbicidas/química
Fungos Mitospóricos/química
Estrutura Molecular
Micotoxinas/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (3-epi-radicinin); 0 (3-hydroxy-2-methyl-7-(3-methyloxiranyl)-2,3-dihydropyrano(4,3-b)pyran-4,5-dione); 0 (Herbicides); 0 (Mycotoxins); 0 (Pyrones); 0 (radicinol); G01Z2N575M (radicinin)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170925
[Lr] Data última revisão:
170925
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170420
[St] Status:MEDLINE
[do] DOI:10.1021/acs.jnatprod.6b00696


  2 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28243952
[Au] Autor:Perazzo AF; de Paula Homem Neto S; Ribeiro OL; Santos EM; de Carvalho GG; de Oliveira JS; Bezerra HF; Campos FS; de Freitas Junior JE
[Ad] Endereço:Federal University of Bahia, Salvador, BA, 40170-110, Brazil. alexandreperazzo@hotmail.com.
[Ti] Título:Intake and ingestive behavior of lambs fed diets containing ammoniated buffel grass hay.
[So] Source:Trop Anim Health Prod;49(4):717-724, 2017 Apr.
[Is] ISSN:1573-7438
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:This study aimed to evaluate the effect of diets with ammoniated buffel grass hay on the ingestive behavior of feedlot lambs. Thirty-two sheep of no defined breed with an average body weight of 17.7 ± 1.8 kg were used. A completely randomized design with four treatments (0, 18, 36, and 54 g/kg dry matter (DM) basis) and eight repetitions was used. Ingestive behavior, rumination, and idle time were similar (P > 0.05) among the diets containing ammoniated buffel grass hay, with mean values of 294.5, 554.44, and 594.25 min per day, respectively. Regarding the chews, all of the variables resulted in similar behavior (P > 0.05). The quadratic effect (P < 0.05) observed for daily intake can be explained based on the amount of DM and neutral detergent fiber (NDF) per meal per rumination. There was no effect of urea levels from the ammoniation (P > 0.05) on the efficiency of DM and NDF consumption. However, the rumination efficiency of DM and NDF showed a quadratic effect (P < 0.05). Thus, the use of ammoniated buffel grass hay with urea in lamb diet affects the ingestive behavior by increasing the rumination efficiency, increased intake, and feed utilization.
[Mh] Termos MeSH primário: Cenchrus
Ingestão de Alimentos/efeitos dos fármacos
Comportamento Alimentar/efeitos dos fármacos
Carneiro Doméstico/psicologia
Ureia/administração & dosagem
[Mh] Termos MeSH secundário: Ração Animal/análise
Animais
Peso Corporal
Dieta/veterinária
Fibras na Dieta
Digestão
Carne
Distribuição Aleatória
Ovinos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Dietary Fiber); 8W8T17847W (Urea)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170301
[St] Status:MEDLINE
[do] DOI:10.1007/s11250-017-1247-2


  3 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27936865
[Au] Autor:Hassan TU; Bano A; Naz I
[Ad] Endereço:a Department of Plant Sciences , Quaid-i-Azam University , Islamabad , Pakistan.
[Ti] Título:Alleviation of heavy metals toxicity by the application of plant growth promoting rhizobacteria and effects on wheat grown in saline sodic field.
[So] Source:Int J Phytoremediation;19(6):522-529, 2017 Jun 03.
[Is] ISSN:1549-7879
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The aim of the study was to determine tolerance of plant growth promoting rhizobacteria (PGPR) in different concentrations of Cu, Cr, Co, Cd, Ni, Mn, and Pb and to evaluate the PGPR-modulated bioavailability of different heavy metals in the rhizosphere soil and wheat tissues, grown in saline sodic soil. Bacillus cereus and Pseudomonas moraviensis were isolated from Cenchrus ciliaris L. growing in the Khewra salt range. Seven-day-old cultures of PGPR were applied on wheat as single inoculum, co-inoculation and carrier-based biofertilizer (using maize straw and sugarcane husk as carrier). At 100 ppm of Cr and Cu, the survival rates of rhizobacteria were decreased by 40%. Single inoculation of PGPR decreased 50% of Co, Ni, Cr and Mn concentrations in the rhizosphere soil. Co-inoculation of PGPR and biofertilizer treatment further augmented the decreases by 15% in Co, Ni, Cr and Mn over single inoculation except Pb and Co where decreases were 40% and 77%, respectively. The maximum decrease in biological concentration factor (BCF) was observed for Cd, Co, Cr, and Mn. P. moraviensis inoculation decreases the biological accumulation coefficient (BAC) as well as translocation factor (TF) for Cd, Cr, Cu Mn, and Ni. The PGPR inoculation minimized the deleterious effects of heavy metals, and the addition of carriers further assisted the PGPR.
[Mh] Termos MeSH primário: Bacillus cereus/fisiologia
Metais Pesados/metabolismo
Pseudomonas/fisiologia
Poluentes do Solo/metabolismo
Triticum/metabolismo
Triticum/microbiologia
[Mh] Termos MeSH secundário: Cenchrus/microbiologia
Relação Dose-Resposta a Droga
Paquistão
Rizosfera
Tolerância a Sal
Solo/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy); 0 (Soil); 0 (Soil Pollutants)
[Em] Mês de entrada:1704
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161213
[St] Status:MEDLINE
[do] DOI:10.1080/15226514.2016.1267696


  4 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Alves, Kaliandra Souza
Texto completo
[PMID]:27714492
[Au] Autor:Luz JB; Alves KS; Mezzomo R; Ribeiro Dos Santos Neta E; Gomes DÍ; Sampaio Oliveira LR; Silva JC; Ramos de Carvalho FF
[Ad] Endereço:Department of Animal Science, Federal Rural University of Amazônia, PA 275, Km 13, Parauapebas, Pará, 68515-000, Brazil. janaina.ufra@hotmail.com.
[Ti] Título:Carcass characteristics and meat quality of lambs fed babassu cake (Orbignya speciosa) as a replacement for elephant grass silage.
[So] Source:Trop Anim Health Prod;49(1):113-119, 2017 Jan.
[Is] ISSN:1573-7438
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The study aimed to evaluate the effect of the partial replacement of elephant grass silage with babassu cake (Orbignya speciosa) on the carcass characteristics and meat quality of feedlot lambs. Forty-five castrated male Santa Ines sheep (19.08 ± 0.41 kg) approximately 4 months old were distributed in a completely randomized design, with five treatments 0.0, 12.5, 25.0, 37.5 and 50 % (%DM) replacement of babassu cake with silage forming isoproteic diets formulated at a ratio of 40 % roughage to 60 % concentrate. All of the studied animals were slaughtered at the end of the experiment. The liver weights and yields increased with the inclusion of babassu cake. The weight of the shoulder increased from 2.31 to 2.61 kg, while the loin yield decreased from 7.38 to 6.64 % with the inclusion of babassu cake, both linearly. The body length, thoracic perimeter, rump perimeter and carcass compactness index showed high and positive correlations with the hot and cold carcass weights. The myofibrillar fragmentation index decreased linearly as a function of the inclusion level of babassu cake, but other quality variables were not affected. The replacement of up to 50 % of the elephant grass silage with babassu cake in the diet of lambs does not cause negative effects on carcass characteristics or meat quality.
[Mh] Termos MeSH primário: Ração Animal/análise
Poaceae/química
Carne Vermelha
[Mh] Termos MeSH secundário: Animais
Arecaceae
Tamanho Corporal
Cenchrus
Dieta/veterinária
Comportamento Alimentar
Indústria Alimentícia
Masculino
Tamanho do Órgão
Pennisetum
Ovinos
Carneiro Doméstico
Silagem/análise
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1707
[Cu] Atualização por classe:171102
[Lr] Data última revisão:
171102
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161008
[St] Status:MEDLINE
[do] DOI:10.1007/s11250-016-1167-6


  5 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:27992496
[Au] Autor:Zhang Z; Tian X; Bai Y; Liu H; Niu X; Wang Z; Wang Q
[Ad] Endereço:The State Key Laboratory of Grassland Agro-Ecosystem, Lanzhou University, Lanzhou, Gansu, China.
[Ti] Título:Field Sandbur (Cenchrus pauciflorus) Seeds in the Same Bur Respond Differently to Temperature and Water Potential in Relation to Germination in a Semi-Arid Environment, China.
[So] Source:PLoS One;11(12):e0168394, 2016.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The success of a biological invasion relies on the environment and is closely linked to factors such as water and temperature. Invasive plant species display different seed characteristics, including shape. Field sandbur (Cenchrus pauciflorus) is a globally widespread invasive species capable of adapting to broad environmental conditions. However, its germination response to water and temperature still remains unclear. C. pauciflorus contains two seeds in the same bur that differ in size: big seeds (M) and small seeds (P). Separate greenhouse experiments were conducted under different temperature regimes (0/10°C, 5/15°C, 10/20°C, 15/25°C, 18/28°C, 20/30°C and 25/35°C) and water potentials (-1.50Mpa, -1.00Mpa, -0.75Mpa, -0.50Mpa, -0.25Mpa and 0Mpa) for M and P seeds. The results support the hypothesis that germination of C. pauciflorus is significantly influenced by seed type, temperature and water potential. M and P seeds responded differently to varied alternative temperatures and water potentials. However, M and P seeds were more sensitive to water potential than to temperature. Optimal conditions for M and P seed germination were measured at 25/35°C (night temperature/day temperature) and 20/30°C, respectively. In contrast, the highest germination rate was observed for the 0Mpa of the water potential treatment. Additionally, base temperature (Tbase) and base water potential (Wbase) were lower for M (7.7°C, -1.11Mpa at 10/20°C, and -1.07Mpa at 20/30°C) than for P (9.4°C, -0.92Mpa at 10/20°C, and -0.52Mpa at 20/30°C). These different germination strategies of M and P seeds with respect to temperature and water potential increased overall plant propagation. These results indicate that tropical and subtropical regions water potentials beyond -0.50Mpa (10/20°C) or -1.00Mpa (20/30°C) face a potential risk of C. pauciflorus invasion.
[Mh] Termos MeSH primário: Cenchrus/fisiologia
Germinação
Sementes/fisiologia
[Mh] Termos MeSH secundário: China
Secas
Temperatura Ambiente
Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
059QF0KO0R (Water)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170713
[Lr] Data última revisão:
170713
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161220
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0168394


  6 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:26906150
[Au] Autor:Quiroga M; Tommasino E; Griffa S; Ribotta A; Colomba EL; Carloni E; Grunberg K
[Ad] Endereço:Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Camino 60 cuadras Km 5 ½, X5020ICA, Córdoba, Argentina. Electronic address: quiroga_mariana@yahoo.com.ar.
[Ti] Título:Genotypic variation in response to salinity in a new sexual germplasm of Cenchrus ciliaris L.
[So] Source:Plant Physiol Biochem;102:53-61, 2016 May.
[Is] ISSN:1873-2690
[Cp] País de publicação:France
[La] Idioma:eng
[Ab] Resumo:As part of a breeding program for new salt-tolerant sexual genotypes of Cenchrus ciliaris L., here we evaluated the salt-stress response of two new sexual hybrids, obtained by controlled crosses, at seedling and germination stages. A seedling hydroponic experiment with 300 mM NaCl was performed and physiological variables and growth components were evaluated. While salt-treated sexual material did not show a decrease in productivity with respect to control plants, a differential response in some physiological characteristics was observed. Sexual hybrid 1-9-1 did not suffer oxidative damage and its proline content did not differ from that of control treatment. By contrast, sexual hybrid 1-7-11 suffered oxidative damage and accumulated proline, maintaining its growth under saline stress. At the germination stage, sexual hybrid 1-9-1 presented the highest Germination Rate Index at the maximum NaCl concentration assayed, suggesting an ecological advantage in this genotype. These new sexual resources are promising maternal parental with differential response to salt and could be incorporated in a breeding program of C. ciliaris in the search of new genotypes tolerant to salinity.
[Mh] Termos MeSH primário: Cenchrus
Variação Genética
Genótipo
Salinidade
Plântulas
[Mh] Termos MeSH secundário: Cenchrus/genética
Cenchrus/crescimento & desenvolvimento
Melhoramento Vegetal
Plântulas/genética
Plântulas/crescimento & desenvolvimento
Cloreto de Sódio/metabolismo
Cloreto de Sódio/farmacologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
451W47IQ8X (Sodium Chloride)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160225
[St] Status:MEDLINE


  7 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:26898690
[Au] Autor:Nambi-Kasozi J; Sabiiti EN; Bareeba FB; Sporndly E; Kabi F
[Ad] Endereço:Department of Agricultural Production, Makerere University, P. O. Box 7062, Kampala, Uganda. jnambik@caes.mak.ac.ug.
[Ti] Título:Effects of inclusion levels of banana (Musa spp.) peelings on feed degradability and rumen environment of cattle fed basal elephant grass.
[So] Source:Trop Anim Health Prod;48(4):693-8, 2016 Apr.
[Is] ISSN:1573-7438
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The effect of feeding varying banana peeling (BP) levels on rumen environment and feed degradation characteristics was evaluated using three rumen fistulated steers in four treatments. The steers were fed BP at 0, 20, 40, and 60% levels of the daily ration with basal elephant grass (EG) to constitute four diets. Maize bran, cotton seed cake, and Gliricidia sepium were offered to make the diets iso-nitrogenous. The nylon bag technique was used to measure BP and EG dry matter (DM), crude protein (CP), and neutral detergent fiber (NDF) degradabilities at 0, 6, 12, 24, 48, 72, 96, and 120 h. Rumen fluid samples were collected to determine pH and volatile fatty acid (VFA) concentrations. Effective DM, CP, and NDF degradabilities of BP ranged between 574 and 807, 629-802, and 527-689 g/kg, respectively, being lower at higher BP levels. Elephant grass degradability behaved similarly with relatively high effective CP degradability (548-569 g/kg) but low effective DM and NDF degradability (381-403 and 336-373 g/kg, respectively). Rumen pH and VFA reduced with increasing BP in the diets. Rumen pH dropped to 5.8 and 5.9 at the 40 and 60% BP feeding levels, respectively. Banana peelings were better degraded than EG but higher BP levels negatively affected feed degradability and rumen environment.
[Mh] Termos MeSH primário: Ração Animal/análise
Dieta/veterinária
Fibras na Dieta/metabolismo
Musa
Rúmen/metabolismo
[Mh] Termos MeSH secundário: Animais
Bovinos
Cenchrus
Digestão
Fabaceae
Ácidos Graxos Voláteis/metabolismo
Concentração de Íons de Hidrogênio
Nitrogênio/metabolismo
Pennisetum
Zea mays/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Dietary Fiber); 0 (Fatty Acids, Volatile); N762921K75 (Nitrogen)
[Em] Mês de entrada:1612
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160223
[St] Status:MEDLINE
[do] DOI:10.1007/s11250-016-0999-4


  8 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:26842722
[Au] Autor:Veena M; Melvin P; Prabhu SA; Shailasree S; Shetty HS; Kini KR
[Ad] Endereço:Department of Studies in Biotechnology, Manasagangotri, University of Mysore, Mysore, Karnataka, 570 006, India.
[Ti] Título:Molecular cloning of a coiled-coil-nucleotide-binding-site-leucine-rich repeat gene from pearl millet and its expression pattern in response to the downy mildew pathogen.
[So] Source:Mol Biol Rep;43(3):117-28, 2016 Mar.
[Is] ISSN:1573-4978
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Downy mildew caused by Sclerospora graminicola is a devastating disease of pearl millet. Based on candidate gene approach, a set of 22 resistance gene analogues were identified. The clone RGPM 301 (AY117410) containing a partial sequence shared 83% similarity to rice R-proteins. A full-length R-gene RGA RGPM 301 of 3552 bp with 2979 bp open reading frame encoding 992 amino acids was isolated by the degenerate primers and rapid amplification of cDNA ends polymerase chain reaction (RACE-PCR) approach. It had a molecular mass of 113.96 kDa and isoelectric point (pI) of 8.71. The sequence alignment and phylogenetic analysis grouped it to a non-TIR NBS LRR group. The quantitative real-time PCR (qRT-PCR) analysis revealed higher accumulation of the transcripts following inoculation with S. graminicola in the resistant cultivar (IP18296) compared to susceptible cultivar (7042S). Further, significant induction in the transcript levels were observed when treated with abiotic elicitor ß-aminobutyric acid (BABA) and biotic elicitor Pseudomonas fluorescens. Exogenous application of phytohormones jasmonic acid or salicylic acid also up-regulated the expression levels of RGA RGPM 301. The treatment of cultivar IP18296 with mitogen-activated protein kinase (MPK) inhibitors (PD98059 and U0126) suppressed the levels of RGA RGPM 301. A 3.5 kb RGA RGPM 301 which is a non-TIR NBS-LRR protein was isolated from pearl millet and its up-regulation during downy mildew interaction was demonstrated by qRT-PCR. These studies indicate a role for this RGA in pearl millet downy mildew interaction.
[Mh] Termos MeSH primário: Resistência à Doença
Oomicetos
Pennisetum/genética
Doenças das Plantas/microbiologia
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Aminobutiratos/farmacologia
Proteínas de Bactérias
Sequência de Bases
Cenchrus/efeitos dos fármacos
Cenchrus/metabolismo
Cenchrus/microbiologia
Cenchrus/fisiologia
Clonagem Molecular
Ciclopentanos/farmacologia
Regulação da Expressão Gênica de Plantas
Dados de Sequência Molecular
Oxilipinas/farmacologia
Pennisetum/metabolismo
Pennisetum/microbiologia
Pennisetum/fisiologia
Filogenia
Proteínas de Plantas/efeitos dos fármacos
Proteínas de Plantas/metabolismo
Pseudomonas fluorescens
Ácido Salicílico/farmacologia
Alinhamento de Sequência
Regulação para Cima
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Aminobutyrates); 0 (Bacterial Proteins); 0 (Cyclopentanes); 0 (Oxylipins); 0 (Plant Proteins); 4282SA5CTS (3-aminobutyric acid); 6RI5N05OWW (jasmonic acid); O414PZ4LPZ (Salicylic Acid)
[Em] Mês de entrada:1610
[Cu] Atualização por classe:171030
[Lr] Data última revisão:
171030
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160205
[St] Status:MEDLINE
[do] DOI:10.1007/s11033-016-3944-8


  9 / 30 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:26601981
[Au] Autor:Syamaladevi DP; Meena SS; Nagar RP
[Ad] Endereço:Western Regional Research Station, Indian Grassland and Fodder Research Institute, Avikanagar, Rajasthan, 304501, India. dpsdevi@gmail.com.
[Ti] Título:Molecular understandings on 'the never thirsty' and apomictic Cenchrus grass.
[So] Source:Biotechnol Lett;38(3):369-76, 2016 Mar.
[Is] ISSN:1573-6776
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:The genus Cenchrus comprises around 25 species of 'bristle clade' grasses. Cenchrus ciliaris (buffel grass) is a hardy, perennial range grass that survives in poor sandy soils and limiting soil moisture conditions and, due to the very same reasons, this grass is one of the most prevalent fodder grasses of the arid and semi-arid regions. Most of the germplasms of Cenchrus produce seeds asexually through the process of apomeiosis. Therefore, the lack of sufficient sexual lines has hindered the crop improvement efforts in Cenchrus being confined to simple selection methods. Many attempts have been initiated in buffel grass to investigate the various molecular aspects such as genomic signatures of different species and genotypes, molecular basis of abiotic stress tolerance and reproductive performance. Even though it is an important fodder crop, molecular investigations in Cenchrus lack focus and the molecular information available on this grass is scanty. Cenchrus is a very good gene source for abiotic stress tolerance and apomixis studies. Biotechnological interventions in Cenchrus can help in crop improvement in Cenchrus as well as other crops through transgenic technology or marker assisted selection. To date no consolidated review on biotechnological interventions in Cenchrus grass has been published. Therefore we provide a thorough and in depth review on molecular research in Cenchrus focusing on molecular signatures of evolution, tolerance to abiotic stress and apomictic reproductive mechanism.
[Mh] Termos MeSH primário: Cenchrus/genética
Cenchrus/fisiologia
Secas
Estresse Fisiológico
[Mh] Termos MeSH secundário: Evolução Molecular
Reprodução
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Em] Mês de entrada:1611
[Cu] Atualização por classe:161230
[Lr] Data última revisão:
161230
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:151126
[St] Status:MEDLINE
[do] DOI:10.1007/s10529-015-2004-0


  10 / 30 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
PubMed Central Texto completo
Texto completo
[PMID]:26305939
[Au] Autor:Conner JA; Mookkan M; Huo H; Chae K; Ozias-Akins P
[Ad] Endereço:Department of Horticulture, University of Georgia Tifton Campus, Tifton, GA 31973.
[Ti] Título:A parthenogenesis gene of apomict origin elicits embryo formation from unfertilized eggs in a sexual plant.
[So] Source:Proc Natl Acad Sci U S A;112(36):11205-10, 2015 Sep 08.
[Is] ISSN:1091-6490
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Apomixis is a naturally occurring mode of asexual reproduction in flowering plants that results in seed formation without the involvement of meiosis or fertilization of the egg. Seeds formed on an apomictic plant contain offspring genetically identical to the maternal plant. Apomixis has significant potential for preserving hybrid vigor from one generation to the next in highly productive crop plant genotypes. Apomictic Pennisetum/Cenchrus species, members of the Poaceae (grass) family, reproduce by apospory. Apospory is characterized by apomeiosis, the formation of unreduced embryo sacs derived from nucellar cells of the ovary and, by parthenogenesis, the development of the unreduced egg into an embryo without fertilization. In Pennisetum squamulatum (L.) R.Br., apospory segregates as a single dominant locus, the apospory-specific genomic region (ASGR). In this study, we demonstrate that the PsASGR-BABY BOOM-like (PsASGR-BBML) gene is expressed in egg cells before fertilization and can induce parthenogenesis and the production of haploid offspring in transgenic sexual pearl millet. A reduction of PsASGR-BBML expression in apomictic F1 RNAi transgenic plants results in fewer visible parthenogenetic embryos and a reduction of embryo cell number compared with controls. Our results endorse a key role for PsASGR-BBML in parthenogenesis and a newly discovered role for a member of the BBM-like clade of APETALA 2 transcription factors. Induction of parthenogenesis by PsASGR-BBML will be valuable for installing parthenogenesis to synthesize apomixis in crops and will have further application for haploid induction to rapidly obtain homozygous lines for breeding.
[Mh] Termos MeSH primário: Apomixia/genética
Genes de Plantas/genética
Óvulo Vegetal/genética
Partenogênese/genética
Poaceae/genética
Sementes/genética
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Cenchrus/embriologia
Cenchrus/crescimento & desenvolvimento
Perfilação da Expressão Gênica
Regulação da Expressão Gênica no Desenvolvimento
Regulação da Expressão Gênica de Plantas
Dados de Sequência Molecular
Análise de Sequência com Séries de Oligonucleotídeos
Óvulo Vegetal/embriologia
Pennisetum/embriologia
Pennisetum/genética
Filogenia
Proteínas de Plantas/classificação
Proteínas de Plantas/genética
Plantas Geneticamente Modificadas
Poaceae/embriologia
Interferência de RNA
Reação em Cadeia da Polimerase Via Transcriptase Reversa
Sementes/embriologia
Homologia de Sequência de Aminoácidos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[Nm] Nome de substância:
0 (Plant Proteins)
[Em] Mês de entrada:1601
[Cu] Atualização por classe:170220
[Lr] Data última revisão:
170220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:150826
[St] Status:MEDLINE
[do] DOI:10.1073/pnas.1505856112



página 1 de 3 ir para página          
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde