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https://www.readbyqxmd.com/read/30315168/diverging-importance-of-drought-stress-for-maize-and-winter-wheat-in-europe
#1
Heidi Webber, Frank Ewert, Jørgen E Olesen, Christoph Müller, Stefan Fronzek, Alex C Ruane, Maryse Bourgault, Pierre Martre, Behnam Ababaei, Marco Bindi, Roberto Ferrise, Robert Finger, Nándor Fodor, Clara Gabaldón-Leal, Thomas Gaiser, Mohamed Jabloun, Kurt-Christian Kersebaum, Jon I Lizaso, Ignacio J Lorite, Loic Manceau, Marco Moriondo, Claas Nendel, Alfredo Rodríguez, Margarita Ruiz-Ramos, Mikhail A Semenov, Stefan Siebert, Tommaso Stella, Pierre Stratonovitch, Giacomo Trombi, Daniel Wallach
Understanding the drivers of yield levels under climate change is required to support adaptation planning and respond to changing production risks. This study uses an ensemble of crop models applied on a spatial grid to quantify the contributions of various climatic drivers to past yield variability in grain maize and winter wheat of European cropping systems (1984-2009) and drivers of climate change impacts to 2050. Results reveal that for the current genotypes and mix of irrigated and rainfed production, climate change would lead to yield losses for grain maize and gains for winter wheat...
October 12, 2018: Nature Communications
https://www.readbyqxmd.com/read/30294222/changes-in-protein-quantities-of-phosphoenolpyruvate-carboxylase-and-rubisco-activase-in-various-wheat-genotypes
#2
Shahniyar Bayramov
In early seedlings of wheat genotypes two isoforms of Rubisco activase with molecular weights of 42 and 46 kDa are expressed. Amounts of both isoforms significantly increase in early seedlings of the durum wheat genotype Barakatli-95 exposed to salt stress. But at the beginning of the tillering stage, the changes in quantities of both RCA isoforms are different in durum and bread wheat genotypes subjected to a 3-day drought stress. In the leaves of the early seedlings of the studied wheat genotypes exposed to drought stress quantities of PEPC subunits increase compared to the control but they remain relatively stable in early roots and germinating seeds...
November 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/30288713/mechanisms-of-maturation-and-germination-in-crop-seeds-exposed-to-environmental-stresses-with-a-focus-on-nutrients-water-status-and-reactive-oxygen-species
#3
Yushi Ishibashi, Takashi Yuasa, Mari Iwaya-Inoue
Environmental stresses can reduce crop yield and quality considerably. Plants protect cell metabolism in response to abiotic stresses at all stages of their life cycle, including seed production. As the production of vigorous seeds is important to both yield and crop growth, we analyzed causes of yield loss and reduced grain quality in staple crops exposed to environmental stresses such as drought and temperature extremes, with a focus on the remobilization of nutrients and water status during seed filling...
2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/30288667/contributions-of-tasuts-to-grain-weight-in-wheat-under-drought
#4
Sarah Al-Sheikh Ahmed, Jingjuan Zhang, Wujun Ma, Bernard Dell
The homologous genes to OsSUT1-5 in wheat were identified and detailed analysed. TaSUT1 was the predominant sucrose transporter group and it illustrated the genotypic variations towards drought during grain filling. Sucrose transporters (SUT) play crucial roles in wheat stem water soluble carbohydrate (WSC) remobilization to grain. To determine the major functional SUT gene groups in shoot parts of wheat during grain development, drought tolerant varieties, Westonia and Kauz, were investigated in field drought experiments...
October 4, 2018: Plant Molecular Biology
https://www.readbyqxmd.com/read/30279375/genome-wide-association-study-reveals-novel-genomic-regions-for-grain-yield-and-yield-related-traits-in-drought-stressed-synthetic-hexaploid-wheat
#5
Madhav Bhatta, Alexey Morgounov, Vikas Belamkar, P Stephen Baenziger
Synthetic hexaploid wheat (SHW; 2 n = 6 x = 42, AABBDD, Triticum aestivum L.) is produced from an interspecific cross between durum wheat (2 n = 4 x = 28, AABB, T. turgidum L.) and goat grass (2 n = 2 x = 14, DD, Aegilops tauschii Coss.) and is reported to have significant novel alleles-controlling biotic and abiotic stresses resistance. A genome-wide association study (GWAS) was conducted to unravel these loci [marker⁻trait associations (MTAs)] using 35,648 genotyping-by-sequencing-derived single nucleotide polymorphisms in 123 SHWs...
October 2, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30278314/accumulation-of-water-soluble-carbohydrates-and-gene-expression-in-wheat-stems-correlates-with-drought-resistance
#6
Junfeng Hou, Xin Huang, Wan Sun, Chenyang Du, Chenyang Wang, Yingxin Xie, Ying Ma, Dongyun Ma
In order to understand the effects of sugar metabolism on drought resistance in wheat, two wheat cultivars with different levels of drought resistance were used in this study. We investigated the accumulation pattern of water-soluble carbohydrates (WSC) and expression profiles of twelve fructan metabolism-related genes in peduncle (PED), penultimate (PEN), and lower internode (LOW) stem tissues under drought stress. LH7, a higher drought-resistance cultivar, contained a higher stem dry weight and higher content of WSC in PED, PEN, and LOW tissues, while XN979, a lower drought-resistance cultivar, contained lower values...
September 27, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/30257577/aba-regulation-of-antioxidant-activity-during-post-germination-desiccation-and-subsequent-rehydration-in-wheat
#7
Satinder Kour, Vikramjit Kaur Zhawar
ABA regulation of antioxidant activity during post-germination desiccation and subsequent rehydration was studied in two wheat cultivars PBW 644 (ABA-higher sensitive and drought tolerant) and PBW 343 (ABA-lesser sensitive and drought susceptible) where 1 d-germinated seeds were exposed to ABA/ PEG- 6000 for next 1 d, desiccated for 4 d and subsequently rehydrated for 4 d. Ascorbate, dehydrascorbate to ascorbate ratio, malondialdehyde (MDA), hydroxyl radicals, and activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), alcohol dehydrogenase (AlcDH) and aldehyde dehydrogenase (AldDH) were measured in seedlings just before desiccation (2 d old), desiccated (6 d old) and rehydrated (10 d old) stages...
September 2018: Acta Biologica Hungarica
https://www.readbyqxmd.com/read/30238225/deciphering-genome-wide-wrky-gene-family-of-triticum-aestivum-l-and-their-functional-role-in-response-to-abiotic-stress
#8
Saurabh Gupta, Vinod Kumar Mishra, Sunita Kumari, Raavi, Ramesh Chand, Pritish Kumar Varadwaj
WRKY transcription factors (TFs) act in regulating plant growth and development as well as in response to different stress. Some earlier studies done by individual researchers reported different wheat WRKY TFs. Although, the recently released wheat genome has opened an avenue to investigate wheat WRKYs (TaWRKY) TFs. Prime objective of this study to performed genome-wide classifications of TaWRKYs and their functional annotation. The classification of 107 individual identified characterized sequences of TaWRKY (IICS-TaWRKY) and 160 uncharacterized draft sequences of TaWRKY (UDS-TaWRKY), along with their gene structures and motifs analysis was performed...
September 20, 2018: Genes & Genomics
https://www.readbyqxmd.com/read/30233617/genome-wide-association-mapping-of-seedling-heat-tolerance-in-winter-wheat
#9
Frank Maulana, Habtamu Ayalew, Joshua D Anderson, Tadele T Kumssa, Wangqi Huang, Xue-Feng Ma
Heat stress during the seedling stage of early-planted winter wheat ( Triticum aestivum L.) is one of the most abiotic stresses of the crop restricting forage and grain production in the Southern Plains of the United States. To map quantitative trait loci (QTLs) and identify single-nucleotide polymorphism (SNP) markers associated with seedling heat tolerance, a genome-wide association mapping study (GWAS) was conducted using 200 diverse representative lines of the hard red winter wheat association mapping panel, which was established by the Triticeae Coordinated Agricultural Project (TCAP) and genotyped with the wheat iSelect 90K SNP array...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/30186298/generalist-and-specialist-mite-herbivores-induce-similar-defense-responses-in-maize-and-barley-but-differ-in-susceptibility-to-benzoxazinoids
#10
Huyen Bui, Robert Greenhalgh, Alice Ruckert, Gunbharpur S Gill, Sarah Lee, Ricardo A Ramirez, Richard M Clark
While substantial progress has been made in understanding defense responses of cereals to insect herbivores, comparatively little is known about responses to feeding by spider mites. Nevertheless, several spider mite species, including the generalist Tetranychus urticae and the grass specialist Oligonychus pratensis , cause damage on cereals such as maize and wheat, especially during drought stress. To understand defense responses of cereals to spider mites, we characterized the transcriptomic responses of maize and barley to herbivory by both mite species, and included a wounding control against which modulation of defenses could be tested...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/30153643/characterization-of-mirnas-and-their-target-genes-in-he-ne-laser-pretreated-wheat-seedlings-exposed-to-drought-stress
#11
Zongbo Qiu, Yanyan He, Yimeng Zhang, Junli Guo, Li Wang
Drought stress is considered a critical environmental factor that negatively affects wheat growth and development, which causes considerable losses in wheat yields worldwide. More recently, numerous microRNAs (miRNAs) have been found to be involved in wheat responses to drought stresses. However, there is little information regarding the effects of He-Ne laser irradiation on the expression traits of miRNAs and their targets in wheat seedlings exposed to drought stress. In the current study, therefore, a combination of physiological and molecular approaches was used to assess the effect of He-Ne laser irradiation on the expression of miRNAs and their targets in wheat seedlings exposed to drought stress...
August 25, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/30150859/terminal-drought-and-seed-priming-improves-drought-tolerance-in-wheat
#12
Tahira Tabassum, Muhammad Farooq, Riaz Ahmad, Ali Zohaib, Abdul Wahid, Muhammad Shahid
Plants retain the preceding abiotic stress memory that may aid in attainment of tolerance to subsequent stresses. This study was conducted to evaluate the influence of terminal drought memory (drought priming) and seed priming in improving drought tolerance in wheat ( Triticum aestivum L.). During first growing season, wheat was planted in field under optimal (well-watered) and drought stress imposed at reproductive stage (BBCH growth stage 49) until maturity (BBCH growth stage 83). Seeds collected from both sources were subjected to hydropriming or osmopriming (with 1...
September 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/30131813/overexpression-of-a-wrky-transcription-factor-tawrky2-enhances-drought-stress-tolerance-in-transgenic-wheat
#13
Huiming Gao, Yafei Wang, Ping Xu, Zhengbin Zhang
Drought is a major environmental stress that severely restricts plant growth and crop productivity. A previous study showed that TaWRKY2 from wheat ( Triticum aestivum ) plays an important role in drought stress tolerance. In the present study, we isolated the promoter of TaWRKY2 and identified multiple regulatory cis -elements in the promoter region. The activity of the TaWRKY2 promoter was induced by drought, salt, heat, and abscisic acid (ABA). We also generated TaWRKY2 -overexpressing transgenic wheat, and found that the transgenic seedlings exhibited significantly enhanced tolerance to drought stress, as evidenced by a higher survival rate and lower water loss rate of detached leaves compared with wild type (WT) plants...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/30123102/characterization-of-tadreb1-in-wheat-genotypes-with-different-seed-germination-under-osmotic-stress
#14
Meng Liu, Zeng Wang, Hong-Mei Xiao, Yan Yang
Background: The cis-acting element DRE/CRT plays an important role in activating gene expression responsive to osmotic stress, low temperature and high-salinity. DREB1 / CBF genes encode DRE-binding proteins with the function as transcript activators. TaDREB1 was also found to be induced by osmotic stress. Methods: The dates of osmotic stress was assessed by seed germination drought resistance index; the full-length cDNA sequences of TaDREB1 gene were downloaded from NCBI datebase; identification of allelic variation and transcript expression were assessed by PCR and semi-quantitive RT-PCR analysis, respectively...
2018: Hereditas
https://www.readbyqxmd.com/read/30121873/characterization-of-wheat-tasnrk2-7-promoter-in-arabidopsis
#15
Jianan Wang, Zhaopeng Song, Hongfang Jia, Shen Yang, Hongying Zhang
Expression of TaSnRK2.7 promoter is strongly induced under abiotic stress and could be used as a valuable tool for improving plant stress resistance via transgenic techniques. The sucrose non-fermenting 1-related protein kinase 2 (SnRK2) gene family plays pivotal roles in response to abiotic stresses (drought, salinity and cold). Here, we studied the expression of five wheat TaSnRK2.7 promoter-5'-deletion constructs (- 2547, - 1621, - 806, - 599, and - 254) fused to beta-glucuronidase (GUS) in Arabidopsis...
August 18, 2018: Planta
https://www.readbyqxmd.com/read/30110906/omics-approaches-for-engineering-wheat-production-under-abiotic-stresses
#16
REVIEW
Tariq Shah, Jinsong Xu, Xiling Zou, Yong Cheng, Mubasher Nasir, Xuekun Zhang
Abiotic stresses greatly influenced wheat productivity executed by environmental factors such as drought, salt, water submergence and heavy metals. The effective management at the molecular level is mandatory for a thorough understanding of plant response to abiotic stress. Understanding the molecular mechanism of stress tolerance is complex and requires information at the omic level. In the areas of genomics, transcriptomics and proteomics enormous progress has been made in the omics field. The rising field of ionomics is also being utilized for examining abiotic stress resilience in wheat...
August 14, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30107881/isolation-and-identification-of-wheat-gene-tadis1-encoding-a-ring-finger-domain-protein-which-negatively-regulates-drought-stress-tolerance-in-transgenic-arabidopsis
#17
Yan Liu, Liqun Li, Li Zhang, Qian Lv, Yi Zhao, Xuejun Li
Drought stress is a major factor that limits the yield and quality in wheat. In this study, we identified an orthologue of the rice gene OsDIS1 (Oryza sativa drought-induced SINA protein 1) in wheat (Triticum aestivum L.) called TaDIS1. TaDIS1 encodes a putative 301 amino acid protein with a C3HC4 RING finger conserved domain at the N-terminal and a SINA domain at the C-terminal. TaDIS1 contains three exons and two introns. qRT-PCR analysis showed that TaDIS1 expression was induced by PEG6000, NaCl, and abscisic acid (ABA) treatment...
October 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/30092756/putative-candidate-genes-responsible-for-leaf-rolling-in-rye-secale-cereale-l
#18
Beata Myśków, Magdalena Góralska, Natalia Lenarczyk, Ilona Czyczyło-Mysza, Stefan Stojałowski
BACKGROUND: Rolling of leaves (RL) is a phenomenon commonly found in grasses. Morphology of the leaf is an important agronomic trait in field crops especially in rice; therefore, majority of the rice breeders are interested in RL. There are only few studies with respect to RL of wheat and barley; however, the information regarding the genetic base of RL with respect to the shape of leaf in rye is lacking. To the best of our knowledge, this is the first study on the localization of loci controlling RL on high density consensus genetic map of rye...
August 9, 2018: BMC Genetics
https://www.readbyqxmd.com/read/30086362/molecular-characterization-of-the-tawtg1-in-bread-wheat-triticum-aestivum-l
#19
Han Zhang, Jian Ma, Jiajun Liu, Yang Mu, Huaping Tang, Yaxi Liu, Guangdeng Chen, Qiantao Jiang, Guoyue Chen, Yuming Wei, Youliang Zheng, Xiujin Lan
OsWTG1 (LOC_Os08g42540.1) functions as an important factor determining grain size and shape in rice. Our understanding on its ortholog in wheat, TaWTG1, is limited. Here, we identified and mapped TaWTG1 in wheat, characterized its gene and protein structures, predicted transcription factor binding sites of its promoter, and the expression patterns was also analysed bases on real-time quantitative PCR and public available microarray data. The WTG1 orthologs in barley (HvWTG1), rice (OsWTG1), Aegilops tauschii (AtWTG1), Triticum urartu (TuWTG1), Triticum turgidum (TtWTG1) and Brachypodium distachyon (BdWTG1) were also identified for comparative analyses...
December 15, 2018: Gene
https://www.readbyqxmd.com/read/30081325/transcriptome-analysis-reveals-interplay-between-hormones-ros-metabolism-and-cell-wall-biosynthesis-for-drought-induced-root-growth-in-wheat
#20
Monika Dalal, Sarika Sahu, Sneha Tiwari, Atmakuri R Rao, Kishor Gaikwad
The ability of roots to grow under drought stress is an adaptive trait for crop plants especially under rain fed and restricted irrigation regime. To unravel the molecular mechanism of drought induced-root growth, root transcriptomes of two wheat genotypes viz. Raj3765 and HD2329, with contrasting root growth under drought stress were analyzed. Drought stress significantly enhanced total root length in Raj3765 as compared to that of HD2329. RNA-seq analysis led to the identification of 2783 and 2638 differentially expressed genes (DEGs) in Raj3765 and HD2329, respectively, under drought stress as compared with non-stress conditions...
September 2018: Plant Physiology and Biochemistry: PPB
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