Genome-wide transcriptome analysis of two maize inbred lines under drought stress

Zheng, Jun; Fu, Junjie; Gou, Mingyue; Huai, Junling; Liu, Yun-Jun; Jian, Min; Huang, Quansheng; Guo, Xin; Zhao, Dong; Wang, Hongzhi; Wang, Guoying

doi:10.1007/s11103-009-9579-6

Cited by 186 publications

(142 citation statements)

References 54 publications

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“…Up-regulation of SUT1 might be necessary to maintain phloem transport despite the decrease in Suc availability caused by increased sequestration of Suc to the vacuole, increased production of osmoprotective sugars such as raffinose, and decreased Suc production. This is consistent with the observed capacity of root growth under severe drought stress, at least in the lines with higher stress tolerance (Zheng et al, 2010), and could also apply to Arabidopsis where a similar pattern was observed. In contrast to drought and salt stress, SUT1 was found to be significantly down-regulated under heat stress in the tested monocots, while SUT4 expression showed the same response.…”

Section: Sut Regulation Is Part Of the Abiotic Stress Responsesupporting

confidence: 90%

Regulation of Sucrose Transporters and Phloem Loading in Response to Environmental Cues

et al. 2017

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Suc transporters (SUTs) play a key role in the allocation and partitioning of photosynthetically fixed carbon in plants. While a function could be assigned to many members of the SUT family, almost no information is available on their regulation. Here, the transcriptional regulation of SUTs in response to various environmental stimuli in the leaves of five dicots (Arabidopsis Extensive data on expression of SUTs in relation to changes of environmental conditions were obtained through a global analysis of 168 transcriptomics data sets. Results were validated by quantitative PCR measurements and extended by the measurement of photosynthesis rate and phloem sugar content to draw insight on the correlation of SUT expression and sugar export from leaves. For the apoplasmic phloem loaders, a clear difference in transcriptional regulation in response to different environmental stimuli was observed. The consistent patterns of SUT expression under abiotic stress indicates which types of SUTs are involved in the regulation of leaf sugar status and in stress signaling. Furthermore, it is shown that down-regulation of phloem loading is likely to be caused by transcriptional regulation of SUTs, while up-regulation depends on post-transcriptional regulation. In poplar, expression of PtaSUT4 was found to consistently respond to environmental stimuli, suggesting a significant role in the regulation of sugar export from leaves in this passive symplasmic phloem loader.

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Section: Sut Regulation Is Part Of the Abiotic Stress Responsesupporting

confidence: 90%

Regulation of Sucrose Transporters and Phloem Loading in Response to Environmental Cues

et al. 2017

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“…7B), but also with evaporative demand (r = 0.51 and 0.48). The QTL on bin 3.05 colocated with a gene coding for a Cysrich TM (Supplemental Table S7) with roles in stress response or stress tolerance (Venancio and Aravind, 2010) and a strong up-regulation under drought stress (Zheng et al, 2010). A QTL on bin 6.01 (84.4 Mb) showed similar pattern of allelic effects although with less effect of climatic scenarios (Fig.…”

Section: Genomic Regions Controlling Grain Yield Displayed Scenario-dmentioning

confidence: 90%

Genome-wide analysis of yield in Europe: allelic effects as functions of drought and heat scenarios

et al. 2016

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Assessing the genetic variability of plant performance under heat and drought scenarios can contribute to reduce the negative effects of climate change. We propose here an approach that consisted of (1) clustering time courses of environmental variables simulated by a crop model in current (35 years 3 55 sites) and future conditions into six scenarios of temperature and water deficit as experienced by maize (Zea mays L.) plants; (2) performing 29 field experiments in contrasting conditions across Europe with 244 maize hybrids; (3) assigning individual experiments to scenarios based on environmental conditions as measured in each field experiment; frequencies of temperature scenarios in our experiments corresponded to future heat scenarios (+5°C); (4) analyzing the genetic variation of plant performance for each environmental scenario. Forty-eight quantitative trait loci (QTLs) of yield were identified by association genetics using a multi-environment multi-locus model. Eight and twelve QTLs were associated to tolerances to heat and drought stresses because they were specific to hot and dry scenarios, respectively, with low or even negative allelic effects in favorable scenarios. Twenty-four QTLs improved yield in favorable conditions but showed nonsignificant effects under stress; they were therefore associated with higher sensitivity. Our approach showed a pattern of QTL effects expressed as functions of environmental variables and scenarios, allowing us to suggest hypotheses for mechanisms and candidate genes underlying each QTL. It can be used for assessing the performance of genotypes and the contribution of genomic regions under current and future stress situations and to accelerate breeding for drought-prone environments.With climate changes, crops will be subjected to more frequent episodes of drought and high temperature that may threaten food security (IPCC, 2014). Reducing the impacts of these effects is an urgent priority that (not exclusively) involves the genetic progress of plant performance under heat and drought stresses (Tester and Langridge, 2010;Lobell et al., 2011). Because hundreds of new genotypes of most cereals are commercialized every year, a generic approach is needed to avoid an endless series of experiments assessing the performances of the newly released genotypes. A systematic exploration of the natural genetic diversity used in breeding can provide information usable for large groups of genotypes. This entails the identification, among the thousands of accessions existing in gene banks, of allelic variants exhibiting specific adaptation traits by addressing three questions: (1) Is there a genetic variability for yield and related traits in dry and hot environments? (2) Can this genetic variability be dissected into the effect of genomic regions (quantitative trait loci, QTLs), and (3) have these genomic

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“…Hundreds of transcription factors (TFs) have been found to modulate tolerance to various abiotic and biotic stresses [23][24][25][26]. Most of these TFs, which belong to several large TF families, such as AP2/ERF, bZIP, COL, MYB, HD-ZIP, and Recently, it was found that overexpression of SNAC1, a NAC gene known to regulate tolerance to drought in rice, remarkably improved tolerance to drought and excessive salinity in ramie [47].…”

Section: Comparison Of the Stress-responsive Tfs Between This Study Amentioning

confidence: 99%

Identification of drought, cadmium and root-lesion nematode infection stress-responsive transcription factors in ramie

et al. 2016

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Drought, cadmium (Cd) stress, and root lesion nematode (RLN) infection are three of the most important stresses affecting ramie growth and development; therefore, ramie breeding programs focus on their management more than on any other abiotic or biotic stresses. The fact that only a small number of stress-responsive transcription factors (TFs) have been identified so far is a major obstacle in the elucidation of mechanisms regulating the response to these three stresses in ramie. In this study, in order to uncover more stress-responsive TFs, a total of 179 nonredundant genes with full-length open reading frames from the MYB, AP2/ERF, bZIP, HD-ZIP, and COL families were obtained by searching for against the ramie transcriptome. Expression pattern analysis demonstrated that most of these genes showed relatively higher expression in the stem xylem and bast than in other tissues. Among these genes, 96 genes were found to be involved in responses to drought, Cd exposure, or RLN-infection. The expression of 54 of these genes was regulated by at least two stresses. These stress-responsive TFs probably have roles in the regulation of stress tolerance. The discovery of these stress-responsive TFs will be helpful for furthering our understanding of the mechanisms that regulate stress responses in ramie.

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Genome-wide transcriptome analysis of two maize inbred lines under drought stress

Cited by 186 publications

References 54 publications

Regulation of Sucrose Transporters and Phloem Loading in Response to Environmental Cues

Regulation of Sucrose Transporters and Phloem Loading in Response to Environmental Cues

Genome-wide analysis of yield in Europe: allelic effects as functions of drought and heat scenarios

Identification of drought, cadmium and root-lesion nematode infection stress-responsive transcription factors in ramie

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