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Drought tolerance

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https://www.readbyqxmd.com/read/28821876/transcriptomic-biochemical-and-physio-anatomical-investigations-shed-more-light-on-responses-to-drought-stress-in-two-contrasting-sesame-genotypes
#1
Komivi Dossa, Donghua Li, Linhai Wang, Xiaomin Zheng, Aili Liu, Jingyin Yu, Xin Wei, Rong Zhou, Daniel Fonceka, Diaga Diouf, Boshou Liao, Ndiaga Cissé, Xiurong Zhang
Sesame is an important oilseed crop with a high oil quality. It is prone to drought stress in the arid and semi-arid areas where it is widely grown. This study aims to decipher the response of tolerant (DT) and sensitive (DS) genotypes to progressive drought based on transcriptome, biochemical and physio-anatomical characterizations. Results indicated that under severe stress, DT relied on a well-functioning taproot while DS displayed a disintegrated root due to collapsed cortical cells. This was attributed to a higher accumulation of osmoprotectants and strong activity of antioxidant enzymes especially peroxidases in DT...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818385/molecular-cloning-and-characterization-of-ptrzpt2-1-a-zpt2-family-gene-encoding-a-cys2-his2-type-zinc-finger-protein-from-trifoliate-orange-poncirus-trifoliata-l-raf-that-enhances-plant-tolerance-to-multiple-abiotic-stresses
#2
Dechun Liu, Li Yang, Man Luo, Qi Wu, Shanbei Liu, Yong Liu
In plants, most Cys2/His2 (C2H2) zinc finger proteins with two zinc finger domains (ZPT2) are involved in abiotic stress responses. In this study, a ZPT2 family gene PtrZPT2-1 was cloned from trifoliate orange (Poncirus trifoliata (L.) Raf.). PtrZPT2-1 is composed of 245 amino acids, has a putative molecular weight of 25.99kDa and an isoelectric point of 8.41. PtrZPT2-1 contained two C2H2 zinc finger domains, one nuclear localization signal (B-box), one transcription repression domain (DLN-box), and one protein-protein interaction domain (L-box)...
October 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28818377/heterologous-expression-of-gmsip1-3-from-soybean-in-tobacco-showed-and-growth-retardation-and-tolerance-to-hydrogen-peroxide
#3
Dayong Zhang, Yihong Huang, Manoj Kumar, Qun Wan, Zhaolong Xu, Hongbo Shao, Girdhar K Pandey
Aquaporins (AQPs) are transmembrane protein channels that are members of Major Intrinsic Proteins (MIP) superfamily. AQPs play important roles in plant reproduction, cell elongation, osmoregulation, influence leaf physiology and are responsive to drought and salt tolerance. Small intrinsic proteins (SIPs)belongs to one of the groups of AQPs, which are mainly localized to endoplasmic reticulum(ER). While this group of aquaporin is being well studied in Arabidopsis, grape and other plant species, not much is known about the molecular regulatory mechanisms driven by ER-type AQPs in Glycine Max...
October 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28818367/metabolic-features-involved-in-drought-stress-tolerance-mechanisms-in-peanut-nodules-and-their-contribution-to-biological-nitrogen-fixation
#4
Ana Laura Furlan, Eliana Bianucci, Stella Castro, Karl-Josef Dietz
Legumes belong to the most important crops worldwide. They increase soil fertility due their ability to establish symbiotic associations with soil microorganisms, known as rhizobia, capable of fixing nitrogen from the atmosphere. However, they are frequently exposed to abiotic stress conditions in particular drought. Such adverse conditions impair the biological nitrogen fixation (BNF) and depend largely on the legume. Therefore, two peanut cultivars with contrasting tolerance to drought, namely the more tolerant EC-98 and the sensitive Granoleico, were investigated to elucidate the relative contribution of BNF to the tolerance to drought...
October 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28801593/genetic-variations-of-hvp5cs1-and-their-association-with-drought-tolerance-related-traits-in-barley-hordeum-vulgare-l
#5
Yanshi Xia, Ronghua Li, Guihua Bai, Kadambot H M Siddique, Rajeev K Varshney, Michael Baum, Guijun Yan, Peiguo Guo
Delta-1-pyrroline-5-carboxylate synthase gene1 (P5CS1) is the key gene involved in the biosynthesis of proline and is significantly induced by drought stress. The exploration of genetic variation in HvP5CS1 may facilitate a better understanding of the mechanism of drought adaptation in barley. In the current study, 41 polymorphisms including 16 single nucleotide polymorphisms (SNPs) and 25 insertions/deletions (indels) were detected in HvP5CS1 among 287 barley (Hordeum vulgare L.) accessions collected worldwide, with 13 distinct haplotypes identified in the barley collection...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28798765/physcomitrella-patens-dehydrins-ppdhna-and-ppdhnc-confer-salinity-and-drought-tolerance-to-transgenic-arabidopsis-plants
#6
Qilong Li, Xiaochen Zhang, Qiang Lv, Dong Zhu, Tianhang Qiu, Yu Xu, Fang Bao, Yikun He, Yong Hu
Dehydrins (DHNs) as a member of late-embryogenesis-abundant (LEA) proteins are involved in plant abiotic stress tolerance. Two dehydrins PpDHNA and PpDHNC were previously characterized from the moss Physcomitrella patens, which has been suggested to be an ideal model plant to study stress tolerance due to its adaptability to extreme environment. In this study, functions of these two genes were analyzed by heterologous expressions in Arabidopsis. Phenotype analysis revealed that overexpressing PpDHN dehydrin lines had stronger stress resistance than wild type and empty-vector control lines...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28798728/draft-genome-sequence-of-the-nitrogen-fixing-rhizobium-sullae-type-strain-is123-t-focusing-on-the-key-genes-for-symbiosis-with-its-host-hedysarum-coronarium-l
#7
Gaurav Sablok, Riccardo Rosselli, Torsten Seeman, Robin van Velzen, Elisa Polone, Alessio Giacomini, Nicola La Porta, Rene Geurts, Rosella Muresu, Andrea Squartini
The prominent feature of rhizobia is their molecular dialogue with plant hosts. Such interaction is enabled by the presence of a series of symbiotic genes encoding for the synthesis and export of signals triggering organogenetic and physiological responses in the plant. The genome of the Rhizobium sullae type strain IS123(T) nodulating the legume Hedysarum coronarium, was sequenced and resulted in 317 scaffolds for a total assembled size of 7,889,576 bp. Its features were compared with those of genomes from rhizobia representing an increasing gradient of taxonomical distance, from a conspecific isolate (Rhizobium sullae WSM1592), to two congeneric cases (Rhizobium leguminosarum bv...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28796917/single-base-methylome-analysis-reveals-dynamic-epigenomic-differences-associated-with-water-deficit-in-apple
#8
Jidi Xu, Shasha Zhou, Xiaoqing Gong, Yi Song, Steve van Nocker, Fengwang Ma, Qingmei Guan
Cytosine methylation is an essential feature of epigenetic regulation and is involved in various biological processes. Although cytosine methylation has been analyzed at the genomic scale for several plant species, there is a general lack of understanding of the dynamics of global and genic DNA methylation in plants growing in environments challenged with biotic and abiotic stresses. In this study, we mapped cytosine methylation at single-base resolution in the genome of commercial apple (Malus x domestica), and analyzed changes in methylation patterns associated with water deficit in representative drought-sensitive and drought-tolerant cultivars...
August 10, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28795103/rna-seq-data-of-oryza-sativa-cultivar-kuku-belang-under-peg-treatment
#9
Bernadette Toni, Hossein Hosseini Monfared, Mohd Noor Mat Isa, Nurulhikma Md Isa, Ismanizan Ismail, Zamri Zainal
Drought stress is the main abiotic factor affecting rice production. Rain-fed upland rice which is grown on unbounded fields and totally dependent on rainfall for moisture is more prone to drought stress compared to rice from other ecosystems. However, upland rice has adapted to this limited water condition, thus are more drought tolerant than rice from other ecosystems. We performed the first transcriptome sequencing of drought tolerant indica upland rice cultivar Kuku Belang to identify differentially expressed genes related to drought tolerance mechanism...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28793327/qtl-mapping-for-nine-drought-responsive-agronomic-traits-in-bread-wheat-under-irrigated-and-rain-fed-environments
#10
Vijay Gahlaut, Vandana Jaiswal, Bhudeva S Tyagi, Gyanendra Singh, Sindhu Sareen, Harindra S Balyan, Pushpendra Kumar Gupta
In bread wheat, QTL interval mapping was conducted for nine important drought responsive agronomic traits. For this purpose, a doubled haploid (DH) mapping population derived from Kukri/Excalibur was grown over three years at four separate locations in India, both under irrigated and rain-fed environments. Single locus analysis using composite interval mapping (CIM) allowed detection of 98 QTL, which included 66 QTL for nine individual agronomic traits and 32 QTL, which affected drought sensitivity index (DSI) for the same nine traits...
2017: PloS One
https://www.readbyqxmd.com/read/28793281/photosynthetic-limitation-and-mechanisms-of-photoprotection-under-drought-and-recovery-of-calotropis-procera-an-evergreen-c3-from-arid-regions
#11
Rebeca Rivas, Gabriella Frosi, Diego G Ramos, Silvia Pereira, Ana M Benko-Iseppon, Mauro G Santos
Calotropis procera is a C3 plant native from arid environmental zones. It is an evergreen, shrubby, non-woody plant with intense photosynthetic metabolism during the dry season. We measured photosynthetic parameters and leaf biochemical traits, such as gas exchange, photochemical parameters, A/Ci analysis, organic solutes, and antioxidant enzymes under controlled conditions in potted plants during drought stress, and following recovery conditions to obtain a better insight in the drought stress responses of C...
July 31, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28791202/transcriptomic-analysis-genic-ssr-development-and-genetic-diversity-of-proso-millet-panicum-miliaceum-poaceae
#12
Siyu Hou, Zhaoxia Sun, Yaoshen Li, Yijie Wang, Hubin Ling, Guofang Xing, Yuanhuai Han, Hongying Li
PREMISE OF THE STUDY: Proso millet (Panicum miliaceum; Poaceae) is a minor crop with good nutritional qualities and strong tolerance to drought stress and soil infertility. However, studies on genetic diversity have been limited due to a lack of efficient genetic markers. METHODS: Illumina sequencing technology was used to generate short read sequences of proso millet, and de novo transcriptome assemblies were used to develop a de novo assembly of proso millet. Genic simple sequence repeat (SSR) markers were identified and used to detect polymorphism among 56 accessions...
July 2017: Applications in Plant Sciences
https://www.readbyqxmd.com/read/28791030/drought-tolerance-in-pinus-halepensis-seed-sources-as-identified-by-distinctive-physiological-and-molecular-markers
#13
Khaled Taïbi, Antonio D Del Campo, Alberto Vilagrosa, José M Bellés, María Pilar López-Gresa, Davinia Pla, Juan J Calvete, José M López-Nicolás, José M Mulet
Drought is one of the main constraints determining forest species growth, survival and productivity, and therefore one of the main limitations for reforestation or afforestation. The aim of this study is to characterize the drought response at the physiological and molecular level of different Pinus halepensis (common name Aleppo pine) seed sources, previously characterized in field trials as drought-sensitive or drought-tolerant. This approach aims to identify different traits capable of predicting the ability of formerly uncharacterized seedlings to cope with drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28790447/wheat-tapub1-modulates-plant-drought-stress-resistance-by-improving-antioxidant-capability
#14
Guangqiang Zhang, Meng Zhang, Zhongxian Zhao, Yuanqing Ren, Qinxue Li, Wei Wang
E3 ligases play significant roles in plant stress tolerance by targeting specific substrate proteins for post-translational modification. In a previous study, we cloned TaPUB1 from Triticum aestivum L., which encodes a U-box E3 ligase. Real-time polymerase chain reaction revealed that the gene was up-regulated under drought stress. To investigate the function of TaPUB1 in the response of plants to drought, we generated transgenic Nicotiana benthamiana (N. benthamiana) plants constitutively expressing TaPUB1 under the CaMV35S promoter...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28780355/expression-of-a-monothiol-glutaredoxin-atgrxs17-in-tomato-solanum-lycopersicum-enhances-drought-tolerance
#15
Qingyu Wu, Ying Hu, Stuart A Sprague, Tayebeh Kakeshpour, Jungeun Park, Paul A Nakata, Ninghui Cheng, Kendal D Hirschi, Frank F White, Sunghun Park
Abiotic stresses are a major factor limiting crop growth and productivity. The Arabidopsis thaliana glutaredoxin S17 (AtGRXS17) gene has conserved functions in plant tolerance to heat and chilling stress in Arabidopsis and, when expressed ectopically, in tomato. Here, we report that ectopic expression of AtGRXS17 in tomato also enhanced tolerance to drought and oxidative stress. AtGRXS17-expressing tomato plants contained twice the shoot water content compared to wild-type plants under water limiting conditions...
August 2, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28776695/three-stress-responsive-nac-transcription-factors-from-populus-euphratica-differentially-regulate-salt-and-drought-tolerance-in-transgenic-plants
#16
Xin Lu, Xiaofei Zhang, Hui Duan, Conglong Lian, Weilun Yin, Xinli Xia
Stress-responsive NAM, ATAF1/2 and CUC2 (SNAC) genes are being used to alter stress tolerance in Arabidopsis or grasses through genetic engineering. However, limited reports are available about the functional characteristics of SNAC in trees. In this study, three putative NAC proteins were identified from Populus euphratica. PeNAC034 and PeNAC045 were classified into the ATAF subgroup andPeNAC036 into the ANAC072 subgroup. These three SNAC transcription factors were localized in the nucleus and contained the transcription activation domain in their C-terminal...
August 4, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28776286/bypassing-mirna-mediated-gene-regulation-under-drought-stress-alternative-splicing-affects-csd1-gene-expression
#17
So-Yon Park, Elizabeth Grabau
The binding site for miR398 in an isoform of Cu/Zn superoxide dismutase (CSD1) is eliminated by alternative splicing to bypass miR398-mediated gene down-regulation under drought stress. MicroRNA (miRNA) binding sites (MBSs) are frequently interrupted by introns and therefore require proper splicing to generate functional MBSs in target transcripts. MBSs can also be excluded during splicing of pre-messenger RNA, leading to different regulation among isoforms. Previous studies have shown that levels of Cu/Zn superoxide dismutase (CSD) are down-regulated by miR398...
August 3, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28775391/drought-tolerant-desmodium-species-effectively-suppress-parasitic-striga-weed-and-improve-cereal-grain-yields-in-western-kenya
#18
Charles A O Midega, Charles J Wasonga, Antony M Hooper, John A Pickett, Zeyaur R Khan
The parasitic weed Striga hermonthica Benth. (Orobanchaceae), commonly known as striga, is an increasingly important constraint to cereal production in sub-Saharan Africa (SSA), often resulting in total yield losses in maize (Zea mays L.) and substantial losses in sorghum (Sorghum bicolor (L.) Moench). This is further aggravated by soil degradation and drought conditions that are gradually becoming widespread in SSA. Forage legumes in the genus Desmodium (Fabaceae), mainly D. uncinatum and D. intortum, effectively control striga and improve crop productivity in SSA...
August 2017: Crop Protection
https://www.readbyqxmd.com/read/28771348/chemical-analysis-of-fermentable-sugars-and-secondary-products-in-23-sweet-sorghum-cultivars
#19
Minori Uchimiya, Joseph E Knoll, William F Anderson, Karen R Harris-Shultz
Sorghum (Sorghum bicolor (L.) Moench) is a heat- and drought-tolerant crop that has promise to supplement corn (Zea mays L.) for biofuel production from fermentable sugars (for sweet cultivars) and lignocellulosic biomass. Quantitative relationships are lacking to predict the accumulation of primary (stem sugars) and secondary (organic acids, phenolics, and inorganic species) products that could either expand (as the value-added product) or limit (as the fermentation inhibitor) the market value of a cultivar...
August 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28770515/enzymatic-and-non-enzymatic-comparison-of-two-different-industrial-tomato-solanum-lycopersicum-varieties-against-drought-stress
#20
Özge Çelik, Alp Ayan, Çimen Atak
BACKGROUND: The aim of this study is to compare the tolerance mechanisms of two industrial tomato varieties (X5671R and 5MX12956) under drought stress. 14 days-old tomato seedlings were subjected to 7 days-long drought stress by withholding irrigation. The effects of stress were determined by enzymatic and non-enzymatic parameters. The physiological damages were evaluated via lipid peroxidation ratio, total protein content, relative water content, chlorophyll content and proline accumulation...
December 2017: Botanical Studies (Taipei, Taiwan)
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