Base de dados : MEDLINE
Pesquisa : A18.024.750.650 [Categoria DeCS]
Referências encontradas : 2128 [refinar]
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  1 / 2128 MEDLINE  
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[PMID]:28461401
[Au] Autor:Hughes J; Hepworth C; Dutton C; Dunn JA; Hunt L; Stephens J; Waugh R; Cameron DD; Gray JE
[Ad] Endereço:Department of Molecular Biology and Biotechnology, University of Sheffield, Sheffield S10 2TN, United Kingdom (J.H., C.D., J.A.D., L.H., J.E.G.).
[Ti] Título:Reducing Stomatal Density in Barley Improves Drought Tolerance without Impacting on Yield.
[So] Source:Plant Physiol;174(2):776-787, 2017 Jun.
[Is] ISSN:1532-2548
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The epidermal patterning factor (EPF) family of secreted signaling peptides regulate the frequency of stomatal development in model dicot and basal land plant species. Here, we identify and manipulate the expression of a barley ( ) ortholog and demonstrate that when overexpressed HvEPF1 limits entry to, and progression through, the stomatal development pathway. Despite substantial reductions in leaf gas exchange, barley plants with significantly reduced stomatal density show no reductions in grain yield. In addition, HvEPF1OE barley lines exhibit significantly enhanced water use efficiency, drought tolerance, and soil water conservation properties. Our results demonstrate the potential of manipulating stomatal frequency for the protection and optimization of cereal crop yields under future drier environments.
[Mh] Termos MeSH primário: Secas
Hordeum/fisiologia
Proteínas de Plantas/genética
Estômatos de Plantas/fisiologia
[Mh] Termos MeSH secundário: Desidratação
Regulação da Expressão Gênica de Plantas
Hordeum/genética
Hordeum/crescimento & desenvolvimento
Proteínas de Plantas/metabolismo
Plantas Geneticamente Modificadas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1104/pp.16.01844


  2 / 2128 MEDLINE  
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[PMID]:27770776
[Au] Autor:Jooste M; Dreyer LL; Oberlander KC
[Ad] Endereço:Department of Botany and Zoology, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa. mich.jooste.m@gmail.com.
[Ti] Título:The phylogenetic significance of leaf anatomical traits of southern African Oxalis.
[So] Source:BMC Evol Biol;16(1):225, 2016 10 22.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The southern African Oxalis radiation is extremely morphologically variable. Despite recent progress in the phylogenetics of the genus, there are few morphological synapomorphies supporting DNA-based clades. Leaflet anatomy can provide an understudied and potentially valuable source of information on the evolutionary history and systematics of this lineage. Fifty-nine leaflet anatomical traits of 109 southern African Oxalis species were assessed in search of phylogenetically significant characters that delineate clades. RESULTS: A combination of 6 leaflet anatomical traits (stomatal position, adaxial epidermal cells, abaxial epidermal cells, mesophyll, sheath around vascular tissue, degree of leaflet conduplication) clearly support various clades defined by previous DNA-based phylogenetic work. Other, mostly continuous leaflet anatomical traits were highly variable and showed less phylogenetic pattern. CONCLUSIONS: Major and unexpected findings include the transition from ancestral hypostomatic leaflets to adaxially-located stomata in the vast majority of southern African Oxalis, the loss of semi-swollen AB epidermal cells and the gain of swollen adaxial and abaxial epidermal cells in selected clades, and multiple changes from ancestral bifacial mesophyll to isobilateral or homogenous mesophyll types. The information gathered in this study will aid in the taxonomic revision of this speciose member of the Greater Cape Floristic Region and provide a basis for future hypotheses regarding its radiation.
[Mh] Termos MeSH primário: Oxalidaceae/anatomia & histologia
Filogenia
Folhas de Planta/anatomia & histologia
[Mh] Termos MeSH secundário: Evolução Biológica
Duplicação Gênica
Células do Mesofilo/citologia
Oxalidaceae/genética
Fenótipo
Folhas de Planta/citologia
Folhas de Planta/genética
Estômatos de Plantas/citologia
Feixe Vascular de Plantas/citologia
Característica Quantitativa Herdável
Tricomas/citologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Mês de entrada:1708
[Cu] Atualização por classe:180128
[Lr] Data última revisão:
180128
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161025
[St] Status:MEDLINE


  3 / 2128 MEDLINE  
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[PMID]:28449122
[Au] Autor:Sussmilch FC; Brodribb TJ; McAdam SAM
[Ad] Endereço:School of Biological Sciences, University of Tasmania, Hobart, TAS, Australia.
[Ti] Título:Up-regulation of NCED3 and ABA biosynthesis occur within minutes of a decrease in leaf turgor but AHK1 is not required.
[So] Source:J Exp Bot;68(11):2913-2918, 2017 05 17.
[Is] ISSN:1460-2431
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A major environmental signal influencing day-time stomatal aperture is the vapour pressure deficit between the leaf and atmosphere (VPD). In angiosperms, increased VPD triggers biosynthesis of abscisic acid (ABA), prompting rapid stomatal closure. Altered cell turgor has been proposed as the trigger for ABA biosynthesis, but the timing and nature of the genetic signals linking these processes have remained uncertain. We investigated this in Arabidopsis by examining changes induced by a decrease in leaf turgor, simulating a natural increase in VPD. We found that the rate-limiting gene within the de novo ABA biosynthesis pathway, 9-cis-epoxycarotenoid dioxygenase 3 (NCED3), was induced and ABA levels increased within just 5 min of decreased leaf turgor. This rapid induction matches the time-frame for initiation of stomatal closure in response to a doubling in VPD. We further examined Arabidopsis histidine kinase1 (AHK1) as the most likely candidate for the turgor-sensing receptor involved, but found no significant difference between wild-type and an ahk1 null mutant in the induction of ABA-biosynthetic genes, ABA production, or stomatal behaviour. We show that decreased leaf turgor triggers de novo ABA biosynthesis within the time-frame of the stomatal response to VPD, but that AHK1 does not fulfil a critical role as a turgor-sensing receptor within this pathway.
[Mh] Termos MeSH primário: Ácido Abscísico/biossíntese
Proteínas de Arabidopsis/fisiologia
Arabidopsis/metabolismo
Dioxigenases/genética
Regulação da Expressão Gênica de Plantas
Histidina Quinase/fisiologia
Folhas de Planta/metabolismo
Proteínas de Plantas/genética
[Mh] Termos MeSH secundário: Arabidopsis/genética
Proteínas de Arabidopsis/genética
Pressão Atmosférica
Dioxigenases/metabolismo
Histidina Quinase/genética
Proteínas de Plantas/metabolismo
Estômatos de Plantas/metabolismo
Transpiração Vegetal/genética
Regulação para Cima
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (Plant Proteins); 72S9A8J5GW (Abscisic Acid); EC 1.13.11.- (Dioxygenases); EC 1.13.11.51 (9-cis-epoxy-carotenoid dioxygenase); EC 2.7.13.1 (AHK1 protein, Arabidopsis); EC 2.7.13.1 (Histidine Kinase)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:180114
[Lr] Data última revisão:
180114
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170428
[St] Status:MEDLINE
[do] DOI:10.1093/jxb/erx124


  4 / 2128 MEDLINE  
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[PMID]:28453883
[Au] Autor:Vráblová M; Vrábl D; Hronková M; Kubásek J; Santrucek J
[Ad] Endereço:Faculty of Science, University of South Bohemia, Ceské Budejovice, Czech Republic.
[Ti] Título:Stomatal function, density and pattern, and CO assimilation in Arabidopsis thaliana tmm1 and sdd1-1 mutants.
[So] Source:Plant Biol (Stuttg);19(5):689-701, 2017 Sep.
[Is] ISSN:1438-8677
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Stomata modulate the exchange of water and CO between plant and atmosphere. Although stomatal density is known to affect CO diffusion into the leaf and thus photosynthetic rate, the effect of stomatal density and patterning on CO assimilation is not fully understood. We used wild types Col-0 and C24 and stomatal mutants sdd1-1 and tmm1 of Arabidopsis thaliana, differing in stomatal density and pattern, to study the effects of these variations on both stomatal and mesophyll conductance and CO assimilation rate. Anatomical parameters of stomata, leaf temperature and carbon isotope discrimination were also assessed. Our results indicate that increased stomatal density enhanced stomatal conductance in sdd1-1 plants, with no effect on photosynthesis, due to both unchanged photosynthetic capacity and decreased mesophyll conductance. Clustering (abnormal patterning formed by clusters of two or more stomata) and a highly unequal distribution of stomata between the adaxial and abaxial leaf sides in tmm1 mutants also had no effect on photosynthesis. Except at very high stomatal densities, stomatal conductance and water loss were proportional to stomatal density. Stomatal formation in clusters reduced stomatal dynamics and their operational range as well as the efficiency of CO transport.
[Mh] Termos MeSH primário: Proteínas de Arabidopsis/metabolismo
Arabidopsis/metabolismo
Dióxido de Carbono/metabolismo
Estômatos de Plantas/metabolismo
[Mh] Termos MeSH secundário: Arabidopsis/genética
Proteínas de Arabidopsis/genética
Isótopos de Carbono/metabolismo
Fotossíntese/genética
Fotossíntese/fisiologia
Estômatos de Plantas/genética
Plantas Geneticamente Modificadas/genética
Plantas Geneticamente Modificadas/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (Carbon Isotopes); 142M471B3J (Carbon Dioxide)
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180112
[Lr] Data última revisão:
180112
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170429
[St] Status:MEDLINE
[do] DOI:10.1111/plb.12577


  5 / 2128 MEDLINE  
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[PMID]:28743038
[Au] Autor:Durkovic J; Husárová H; Javoríková L; Canová I; Suleková M; Kardosová M; Lukácik I; Mamonová M; Lagana R
[Ad] Endereço:Department of Phytology, Technical University, T.G. Masaryka 24, 960 53 Zvolen, Slovak Republic. Electronic address: jaroslav.durkovic@tuzvo.sk.
[Ti] Título:Physiological, vascular and nanomechanical assessment of hybrid poplar leaf traits in micropropagated plants and plants propagated from root cuttings: A contribution to breeding programs.
[So] Source:Plant Physiol Biochem;118:449-459, 2017 Sep.
[Is] ISSN:1873-2690
[Cp] País de publicação:France
[La] Idioma:eng
[Ab] Resumo:Micropropagated plants experience significant stress from rapid water loss when they are transferred from an in vitro culture to either greenhouse or field conditions. This is caused both by inefficient stomatal control of transpiration and the change to a higher light intensity and lower humidity. Understanding the physiological, vascular and biomechanical processes that allow micropropagated plants to modify their phenotype in response to environmental conditions can help to improve both field performance and plant survival. To identify changes between the hybrid poplar [Populus tremula × (Populus × canescens)] plants propagated from in vitro tissue culture and those from root cuttings, we assessed leaf performance for any differences in leaf growth, photosynthetic and vascular traits, and also nanomechanical properties of the tracheary element cell walls. The micropropagated plants showed significantly higher values for leaf area, leaf length, leaf width and leaf dry mass. The greater leaf area and leaf size dimensions resulted from the higher transpiration rate recorded for this stock type. Also, the micropropagated plants reached higher values for chlorophyll a fluorescence parameters and for the nanomechanical dissipation energy of tracheary element cell walls which may indicate a higher damping capacity within the primary xylem tissue under abiotic stress conditions. The performance of the plants propagated from root cuttings was superior for instantaneous water-use efficiency which signifies a higher acclimation capacity to stressful conditions during a severe drought particularly for this stock type. Similarities were found among the majority of the examined leaf traits for both vegetative plant origins including leaf mass per area, stomatal conductance, net photosynthetic rate, hydraulic axial conductivity, indicators of leaf midrib vascular architecture, as well as for the majority of cell wall nanomechanical traits. This research revealed that there were no drawbacks in the leaf physiological performance which could be attributed to the micropropagated plants of fast growing hybrid poplar.
[Mh] Termos MeSH primário: Melhoramento Vegetal/métodos
Folhas de Planta
Raízes de Plantas
Estômatos de Plantas
Populus
Característica Quantitativa Herdável
[Mh] Termos MeSH secundário: Quimera
Folhas de Planta/genética
Folhas de Planta/crescimento & desenvolvimento
Raízes de Plantas/genética
Raízes de Plantas/crescimento & desenvolvimento
Estômatos de Plantas/genética
Estômatos de Plantas/crescimento & desenvolvimento
Populus/genética
Populus/crescimento & desenvolvimento
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171226
[Lr] Data última revisão:
171226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170726
[St] Status:MEDLINE


  6 / 2128 MEDLINE  
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[PMID]:27776931
[Au] Autor:Chen ZH; Chen G; Dai F; Wang Y; Hills A; Ruan YL; Zhang G; Franks PJ; Nevo E; Blatt MR
[Ad] Endereço:College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China; School of Science and Health, Western Sydney University, Penrith, NSW 2751, Australia. Electronic address: z.chen@westernsydney.edu.au.
[Ti] Título:Molecular Evolution of Grass Stomata.
[So] Source:Trends Plant Sci;22(2):124-139, 2017 Feb.
[Is] ISSN:1878-4372
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Grasses began to diversify in the late Cretaceous Period and now dominate more than one third of global land area, including three-quarters of agricultural land. We hypothesize that their success is likely attributed to the evolution of highly responsive stomata capable of maximizing productivity in rapidly changing environments. Grass stomata harness the active turgor control mechanisms present in stomata of more ancient plant lineages, maximizing several morphological and developmental features to ensure rapid responses to environmental inputs. The evolutionary development of grass stomata appears to have been a gradual progression. Therefore, understanding the complex structures, developmental events, regulatory networks, and combinations of ion transporters necessary to drive rapid stomatal movement may inform future efforts towards breeding new crop varieties.
[Mh] Termos MeSH primário: Evolução Molecular
Estômatos de Plantas/metabolismo
Poaceae/metabolismo
[Mh] Termos MeSH secundário: Evolução Biológica
Transporte de Íons/genética
Transporte de Íons/fisiologia
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Estômatos de Plantas/genética
Estômatos de Plantas/fisiologia
Poaceae/genética
Poaceae/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Plant Proteins)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171201
[Lr] Data última revisão:
171201
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161026
[St] Status:MEDLINE


  7 / 2128 MEDLINE  
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[PMID]:29023453
[Au] Autor:Anderegg WRL; Wolf A; Arango-Velez A; Choat B; Chmura DJ; Jansen S; Kolb T; Li S; Meinzer F; Pita P; Resco de Dios V; Sperry JS; Wolfe BT; Pacala S
[Ad] Endereço:Department of Biology, University of Utah, Salt Lake City, Utah, United States of America.
[Ti] Título:Plant water potential improves prediction of empirical stomatal models.
[So] Source:PLoS One;12(10):e0185481, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Climate change is expected to lead to increases in drought frequency and severity, with deleterious effects on many ecosystems. Stomatal responses to changing environmental conditions form the backbone of all ecosystem models, but are based on empirical relationships and are not well-tested during drought conditions. Here, we use a dataset of 34 woody plant species spanning global forest biomes to examine the effect of leaf water potential on stomatal conductance and test the predictive accuracy of three major stomatal models and a recently proposed model. We find that current leaf-level empirical models have consistent biases of over-prediction of stomatal conductance during dry conditions, particularly at low soil water potentials. Furthermore, the recently proposed stomatal conductance model yields increases in predictive capability compared to current models, and with particular improvement during drought conditions. Our results reveal that including stomatal sensitivity to declining water potential and consequent impairment of plant water transport will improve predictions during drought conditions and show that many biomes contain a diversity of plant stomatal strategies that range from risky to conservative stomatal regulation during water stress. Such improvements in stomatal simulation are greatly needed to help unravel and predict the response of ecosystems to future climate extremes.
[Mh] Termos MeSH primário: Fotossíntese/fisiologia
Folhas de Planta/fisiologia
Estômatos de Plantas/fisiologia
Transpiração Vegetal/fisiologia
Ciclo Hidrológico
Água/química
[Mh] Termos MeSH secundário: Mudança Climática
Ecossistema
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
059QF0KO0R (Water)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171027
[Lr] Data última revisão:
171027
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171013
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185481


  8 / 2128 MEDLINE  
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[PMID]:28953931
[Au] Autor:Carins Murphy MR; Jordan GJ; Brodribb TJ
[Ad] Endereço:School of Biological Sciences, University of Tasmania, Hobart, Tasmania, Australia.
[Ti] Título:Ferns are less dependent on passive dilution by cell expansion to coordinate leaf vein and stomatal spacing than angiosperms.
[So] Source:PLoS One;12(9):e0185648, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Producing leaves with closely spaced veins is a key innovation linked to high rates of photosynthesis in angiosperms. A close geometric link between veins and stomata in angiosperms ensures that investment in enhanced venous water transport provides the strongest net carbon return to the plant. This link is underpinned by "passive dilution" via expansion of surrounding cells. However, it is not known whether this 'passive dilution' mechanism is present in plant lineages other than angiosperms and is another key feature of the angiosperms' evolutionary success. Consequently, we sought to determine whether the 'passive dilution' mechanism is; (i) exclusive to the angiosperms, (ii) a conserved mechanism that evolved in the common ancestor of ferns and angiosperms, or (iii) has evolved continuously over time. To do this we first we assessed the plasticity of vein and stomatal density and epidermal cell size in ferns in response to light environment. We then compared the relationships between these traits found among ferns with modelled relationships that assume vein and stomatal density respond passively to epidermal cell expansion, and with those previously observed in angiosperms. Vein density, stomatal density and epidermal cell size were linked in ferns with remarkably similar relationships to those observed in angiosperms, except that fern leaves had fewer veins per stomata. However, plasticity was limited in ferns and stomatal spacing was dependent on active stomatal differentiation as well as passive cell expansion. Thus, ferns (like angiosperms) appear to coordinate vein and stomatal density with epidermal cell expansion to some extent to maintain a constant ratio between veins and stomata in the leaf. The different general relationships between vein density and stomatal density in ferns and angiosperms suggests the groups have different optimum balances between the production of vein tissue dedicated to water supply and stomatal tissue for gas exchange.
[Mh] Termos MeSH primário: Gleiquênias/fisiologia
Magnoliopsida/fisiologia
Folhas de Planta/fisiologia
Estômatos de Plantas/fisiologia
[Mh] Termos MeSH secundário: Gleiquênias/citologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170928
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0185648


  9 / 2128 MEDLINE  
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[PMID]:28937978
[Au] Autor:Albert R; Acharya BR; Jeon BW; Zañudo JGT; Zhu M; Osman K; Assmann SM
[Ad] Endereço:Department of Physics, Pennsylvania State University, University Park, Pennsylvania, United States of America.
[Ti] Título:A new discrete dynamic model of ABA-induced stomatal closure predicts key feedback loops.
[So] Source:PLoS Biol;15(9):e2003451, 2017 Sep.
[Is] ISSN:1545-7885
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Stomata, microscopic pores in leaf surfaces through which water loss and carbon dioxide uptake occur, are closed in response to drought by the phytohormone abscisic acid (ABA). This process is vital for drought tolerance and has been the topic of extensive experimental investigation in the last decades. Although a core signaling chain has been elucidated consisting of ABA binding to receptors, which alleviates negative regulation by protein phosphatases 2C (PP2Cs) of the protein kinase OPEN STOMATA 1 (OST1) and ultimately results in activation of anion channels, osmotic water loss, and stomatal closure, over 70 additional components have been identified, yet their relationships with each other and the core components are poorly elucidated. We integrated and processed hundreds of disparate observations regarding ABA signal transduction responses underlying stomatal closure into a network of 84 nodes and 156 edges and, as a result, established those relationships, including identification of a 36-node, strongly connected (feedback-rich) component as well as its in- and out-components. The network's domination by a feedback-rich component may reflect a general feature of rapid signaling events. We developed a discrete dynamic model of this network and elucidated the effects of ABA plus knockout or constitutive activity of 79 nodes on both the outcome of the system (closure) and the status of all internal nodes. The model, with more than 1024 system states, is far from fully determined by the available data, yet model results agree with existing experiments in 82 cases and disagree in only 17 cases, a validation rate of 75%. Our results reveal nodes that could be engineered to impact stomatal closure in a controlled fashion and also provide over 140 novel predictions for which experimental data are currently lacking. Noting the paucity of wet-bench data regarding combinatorial effects of ABA and internal node activation, we experimentally confirmed several predictions of the model with regard to reactive oxygen species, cytosolic Ca2+ (Ca2+c), and heterotrimeric G-protein signaling. We analyzed dynamics-determining positive and negative feedback loops, thereby elucidating the attractor (dynamic behavior) repertoire of the system and the groups of nodes that determine each attractor. Based on this analysis, we predict the likely presence of a previously unrecognized feedback mechanism dependent on Ca2+c. This mechanism would provide model agreement with 10 additional experimental observations, for a validation rate of 85%. Our research underscores the importance of feedback regulation in generating robust and adaptable biological responses. The high validation rate of our model illustrates the advantages of discrete dynamic modeling for complex, nonlinear systems common in biology.
[Mh] Termos MeSH primário: Ácido Abscísico/fisiologia
Modelos Biológicos
Reguladores de Crescimento de Planta/fisiologia
Estômatos de Plantas/fisiologia
[Mh] Termos MeSH secundário: Arabidopsis
Proteínas de Arabidopsis/metabolismo
Cálcio/metabolismo
Retroalimentação Fisiológica
Proteína Fosfatase 2C/metabolismo
Transdução de Sinais
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arabidopsis Proteins); 0 (Plant Growth Regulators); 72S9A8J5GW (Abscisic Acid); EC 3.1.3.16 (Protein Phosphatase 2C); SY7Q814VUP (Calcium)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171022
[Lr] Data última revisão:
171022
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170923
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pbio.2003451


  10 / 2128 MEDLINE  
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[PMID]:28873454
[Au] Autor:Müller M; Seifert S; Lübbe T; Leuschner C; Finkeldey R
[Ad] Endereço:Forest Genetics and Forest Tree Breeding, Faculty for Forest Sciences and Forest Ecology, University of Goettingen, Goettingen, Lower-Saxony, Germany.
[Ti] Título:De novo transcriptome assembly and analysis of differential gene expression in response to drought in European beech.
[So] Source:PLoS One;12(9):e0184167, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Despite the ecological and economic importance of European beech (Fagus sylvatica L.) genomic resources of this species are still limited. This hampers an understanding of the molecular basis of adaptation to stress. Since beech will most likely be threatened by the consequences of climate change, an understanding of adaptive processes to climate change-related drought stress is of major importance. Here, we used RNA-seq to provide the first drought stress-related transcriptome of beech. In a drought stress trial with beech saplings, 50 samples were taken for RNA extraction at five points in time during a soil desiccation experiment. De novo transcriptome assembly and analysis of differential gene expression revealed 44,335 contigs, and 662 differentially expressed genes between the stress and normally watered control group. Gene expression was specific to the different time points, and only five genes were significantly differentially expressed between the stress and control group on all five sampling days. GO term enrichment showed that mostly genes involved in lipid- and homeostasis-related processes were upregulated, whereas genes involved in oxidative stress response were downregulated in the stressed seedlings. This study gives first insights into the genomic drought stress response of European beech, and provides new genetic resources for adaptation research in this species.
[Mh] Termos MeSH primário: Secas
Fagus/genética
Fagus/fisiologia
Perfilação da Expressão Gênica
Regulação da Expressão Gênica de Plantas
Transcriptoma/genética
[Mh] Termos MeSH secundário: Ontologia Genética
Genótipo
Repetições de Microssatélites/genética
Anotação de Sequência Molecular
Estômatos de Plantas/fisiologia
RNA Mensageiro/genética
RNA Mensageiro/metabolismo
Reação em Cadeia da Polimerase em Tempo Real
Análise de Sequência de RNA
Estresse Fisiológico/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Messenger)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171016
[Lr] Data última revisão:
171016
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170906
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0184167



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