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https://www.readbyqxmd.com/read/29666352/quantitative-trait-loci-mapping-for-stomatal-traits-in-interspecific-hybrids-of-eucalyptus
#1
M Sumathi, V K W Bachpai, B Deeparaj, A Mayavel, Modhumita Ghosh Dasgupta, B Nagarajan, D Rajasugunasekar, V Sivakumar, R Yasodha
Eucalyptus is an important industrial species with tolerance to drought and salt stress. Genetic improvement activities including quantitative trait loci (QTL) mapping for pulping and adventitious rooting traits are in progress, but no information is available on the genomic regions on adaptive traits such as stomatal characteristics. In this study, an interspecific cross between Eucalyptus tereticornis and E. grandis was generated for the development of genetic map and QTL identification for stomatal traits...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29666338/identification-of-ssr-and-retrotransposon-based-molecular-markers-linked-to-morphological-characters-in-oily-sunfl-ower-helianthus-annuus-l-under-natural-and-water-limited-states
#2
Soleimani Gezeljeh Ali, Reza Darvishzadeh, Asa Ebrahimi, Mohammad Reza Bihamta
Sunflower is an important source of edible oil. Drought is known as an important factor limiting the growth and productivity of field crops in most parts of the world. Agricultural biotechnology mainly aims at developing crops with higher tolerance to the challenging environmental conditions, such as drought. This study examined a number of morphological characters, along with relative water content (RWC) in 100 inbred sunflower lines. A 10 × 10 simple lattice design with two replications was employed to measure the mentioned parameters under natural and water-limited states during two successive years...
March 2018: Journal of Genetics
https://www.readbyqxmd.com/read/29661842/accounting-for-genotype-by-environment-interactions-and-residual-genetic-variation-in-genomic-selection-for-water-soluble-carbohydrate-concentration-in-wheat
#3
Ben Ovenden, Andrew Milgate, Len J Wade, Greg J Rebetzke, James B Holland
Abiotic stress tolerance traits are often complex and recalcitrant targets for conventional breeding improvement in many crop species. This study evaluated the potential of genomic selection to predict water-soluble carbohydrate concentration (WSCC), an important drought tolerance trait, in wheat under field conditions. A panel of 358 varieties and breeding lines constrained for maturity was evaluated under rainfed and irrigated treatments across two locations and two years. Whole-genome marker profiles and factor analytic mixed models were used to generate genomic estimated breeding values (GEBVs) for specific environments and environment groups...
April 16, 2018: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29659577/transcription-factor-hat1-is-a-substrate-of-snrk2-3-kinase-and-negatively-regulates-aba-synthesis-and-signaling-in-arabidopsis-responding-to-drought
#4
Wenrong Tan, Dawei Zhang, Huapeng Zhou, Ting Zheng, Yanhai Yin, Honghui Lin
Drought is a major threat to plant growth and crop productivity. The phytohormone abscisic acid (ABA) plays a critical role in plant response to drought stress. Although ABA signaling-mediated drought tolerance has been widely investigated in Arabidopsis thaliana, the feedback mechanism and components negatively regulating this pathway are less well understood. Here we identified a member of Arabidopsis HD-ZIP transcription factors HAT1 which can interacts with and be phosphorylated by SnRK2s. hat1hat3, loss-of-function mutant of HAT1 and its homolog HAT3, was hypersensitive to ABA in primary root inhibition, ABA-responsive genes expression, and displayed enhanced drought tolerance, whereas HAT1 overexpressing lines were hyposensitive to ABA and less tolerant to drought stress, suggesting that HAT1 functions as a negative regulator in ABA signaling-mediated drought response...
April 16, 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29656008/identification-of-mirnas-linked-with-the-drought-response-of-tef-eragrostis-tef-zucc-trotter
#5
Federico Martinelli, Gina Cannarozzi, Bipin Balan, Fredy Siegrist, Annett Weichert, Regula Blösch, Zerihun Tadele
Tef [Eragrostis tef (Zucc.) Trotter], a staple food crop in the Horn of Africa and particularly in Ethiopia, has several beneficial agronomical and nutritional properties, including waterlogging and drought tolerance. In this study, we performed microRNA profiling of tef using the Illumina HiSeq 2500 platform, analyzing both shoots and roots of two tef genotypes, one drought-tolerant (Tsedey) and one drought-susceptible (Alba). We obtained more than 10 million filtered reads for each of the 24 sequenced small cDNA libraries...
March 29, 2018: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29653436/a-chloroplast-targeted-cabbage-dead-box-rna-helicase-brrh22-confers-abiotic-stress-tolerance-to-transgenic-arabidopsis-plants-by-affecting-translation-of-chloroplast-transcripts
#6
Ghazala Nawaz, Kwanuk Lee, Su Jung Park, Yeon-Ok Kim, Hunseung Kang
Although the roles of many DEAD-box RNA helicases (RHs) have been determined in the nucleus as well as in cytoplasm during stress responses, the importance of chloroplast-targeted DEAD-box RHs in stress response remains largely unknown. In this study, we determined the function of BrRH22, a chloroplast-targeted DEAD-box RH in cabbage (Brassica rapa), in abiotic stress responses. The expression of BrRH22 was markedly increased by drought, heat, salt, or cold stress and by ABA treatment, but was largely decreased by UV stress...
April 7, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29652907/transcriptomic-analysis-reveals-the-differentially-expressed-genes-and-pathways-involved-in-drought-tolerance-in-pearl-millet-pennisetum-glaucum-l-r-br
#7
Ambika Dudhate, Harshraj Shinde, Daisuke Tsugama, Shenkui Liu, Tetsuo Takano
Pearl millet is a cereal crop known for its high tolerance to drought, heat and salinity stresses as well as for its nutritional quality. The molecular mechanism of drought tolerance in pearl millet is unknown. Here we attempted to unravel the molecular basis of drought tolerance in two pearl millet inbred lines, ICMB 843 and ICMB 863 using RNA sequencing. Under greenhouse condition, ICMB 843 was found to be more tolerant to drought than ICMB 863. We sequenced the root transcriptome from both lines under control and drought conditions using an Illumina Hi-Seq platform, generating 139...
2018: PloS One
https://www.readbyqxmd.com/read/29651660/comparative-analysis-of-transcriptome-in-two-wheat-genotypes-with-contrasting-levels-of-drought-tolerance
#8
Jitendra Kumar, Samatha Gunapati, Shahryar F Kianian, Sudhir P Singh
Drought tolerance is a complex trait that is governed by multiple genes. The study presents differential transcriptome analysis between drought-tolerant (Triticum aestivum Cv. C306) and drought-sensitive (Triticum aestivum Cv. WL711) genotypes, using Affymetrix GeneChip® Wheat Genome Array. Both genotypes exhibited diverse global transcriptional responses under control and drought conditions. Pathway analysis suggested significant induction or repression of genes involved in secondary metabolism, nucleic acid synthesis, protein synthesis, and transport in C306, as compared to WL711...
April 12, 2018: Protoplasma
https://www.readbyqxmd.com/read/29650161/molecular-and-functional-characterization-of-shnac1-an-nac-transcription-factor-from-solanum-habrochaites
#9
Hui Liu, Yuhong Zhou, Hanxia Li, Taotao Wang, Junhong Zhang, Bo Ouyang, Zhibiao Ye
NAC transcription factors (TFs) are important regulators of plant adaptation to abiotic stress. In this study, we functionally characterized an NAC TF, ShNAC1, from Solanum habrochaites. ShNAC1 was up-regulated by drought, cold, and salt stresses, and it displayed lower expression at the late stage of stress treatments than its orthologous gene in S. lycopersicum. Overexpression of ShNAC1 in tomato resulted in reduced cold, drought, and salt tolerance. Additionally, ShNAC1 displayed the highest expression in senescent leaf, and overexpressing ShNAC1 accelerated salt- and dark-induced leaf senescence...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29650152/the-antagonistic-basic-helix-loop-helix-partners-bee-and-ibh1-contribute-to-control-plant-tolerance-to-abiotic-stress
#10
Javier E Moreno, Guillermo Moreno-Piovano, Raquel L Chan
The bHLH family is composed by canonical and non-canonical transcription factors (TFs) that differ in the presence or absence of their DNA-binding domain, respectively. Since both types of bHLH proteins are able to dimerize, their relative abundance impacts their biological activity. Among this TF family BEE and IBH are canonical and non-canonical bHLHs, respectively and previous reports indicated that BEE2 and IBH1 dimerize. Wondering whether BEE TFs participate in the abiotic stress response and how the dimerization with IBH1 could regulate their role in Arabidopsis, double bee1/bee2 and triple bee1/bee2/bee3 mutants were tested under salinity and drought stresses...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29642585/mitochondrial-biogenesis-in-diverse-cauliflower-cultivars-under-mild-and-severe-drought-impaired-coordination-of-selected-transcript-and-proteomic-responses-and-regulation-of-various-multifunctional-proteins
#11
Michał Rurek, Magdalena Czołpińska, Tomasz Andrzej Pawłowski, Aleksandra Maria Staszak, Witold Nowak, Włodzimierz Krzesiński, Tomasz Spiżewski
Mitochondrial responses under drought within Brassica genus are poorly understood. The main goal of this study was to investigate mitochondrial biogenesis of three cauliflower ( Brassica oleracea var. botrytis ) cultivars with varying drought tolerance. Diverse quantitative changes (decreases in abundance mostly) in the mitochondrial proteome were assessed by two-dimensional gel electrophoresis (2D PAGE) coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS). Respiratory (e.g., complex II, IV (CII, CIV) and ATP synthase subunits), transporter (including diverse porin isoforms) and matrix multifunctional proteins (e...
April 10, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29628919/fungal-endophytes-beyond-herbivore-management
#12
REVIEW
Bamisope S Bamisile, Chandra K Dash, Komivi S Akutse, Ravindran Keppanan, Liande Wang
The incorporation of entomopathogenic fungi as biocontrol agents into Integrated Pest Management (IPM) programs without doubt, has been highly effective. The ability of these fungal pathogens such as Beauveria bassiana and Metarhizium anisopliae to exist as endophytes in plants and protect their colonized host plants against the primary herbivore pests has widely been reported. Aside this sole role of pest management that has been traditionally ascribed to fungal endophytes, recent findings provided evidence of other possible functions as plant yield promoter, soil nutrient distributor, abiotic stress and drought tolerance enhancer in plants...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29627732/responses-of-grapevine-rootstocks-to-drought-through-altered-root-system-architecture-and-root-transcriptomic-regulations
#13
Kubilay Yıldırım, Adem Yağcı, Seda Sucu, Sümeyye Tunç
Roots are the major interface between the plant and various stress factors in the soil environment. Alteration of root system architecture (RSA) (root length, spread, number and length of lateral roots) in response to environmental changes is known to be an important strategy for plant adaptation and productivity. In light of ongoing climate changes and global warming predictions, the breeding of drought-tolerant grapevine cultivars is becoming a crucial factor for developing a sustainable viticulture. Root-trait modeling of grapevine rootstock for drought stress scenarios, together with high-throughput phenotyping and genotyping techniques, may provide a valuable background for breeding studies in viticulture...
March 31, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29626705/biosynthetic-pathways-of-glycinebetaine-in-thalassiosira-pseudonana-functional-characterization-of-enzyme-catalyzing-three-step-methylation-of-glycine
#14
Hakuto Kageyama, Yoshito Tanaka, Teruhiro Takabe
Betaine (trimethylglycine) is an important compatible solute that accumulates in response to abiotic stresses such as drought and salinity. Biosynthetic pathways of betaine have been extensively studied, but it remains to be clarified on algae. A diatom Thalassiosira pseudonana CCMP1335 is an important component of marine ecosystems. Here we show that the genome sequence of Thalassiosira suggests the presence of two biosynthetic pathways for betaine, via three step methylation of glycine and via two step oxidation of choline...
March 30, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29626230/multiple-filters-affect-tree-species-assembly-in-mid-latitude-forest-communities
#15
Y Kubota, B Kusumoto, T Shiono, W Ulrich
Species assembly patterns of local communities are shaped by the balance between multiple abiotic/biotic filters and dispersal that both select individuals from species pools at the regional scale. Knowledge regarding functional assembly can provide insight into the relative importance of the deterministic and stochastic processes that shape species assembly. We evaluated the hierarchical roles of the α niche and β niches by analyzing the influence of environmental filtering relative to functional traits on geographical patterns of tree species assembly in mid-latitude forests...
April 6, 2018: Oecologia
https://www.readbyqxmd.com/read/29623182/metabolic-responses-to-drought-stress-in-the-tissues-of-drought-tolerant-and-drought-sensitive-wheat-genotype-seedlings
#16
Rui Guo, LianXuan Shi, Yang Jiao, MingXia Li, XiuLi Zhong, FengXue Gu, Qi Liu, Xu Xia, HaoRu Li
An in-depth understanding of the effects of drought stress on plant metabolism is necessary to improve the drought tolerance of wheat and to utilize genetic resources for the development of drought stress-tolerant wheat varieties. In this study, the profiles of 58 key metabolites produced by wheat seedlings in response to drought stress were investigated to determine various physiological processes related to drought tolerance between drought-tolerant and drought-sensitive wheat genotypes. Results showed that the wheat metabolome was dominated by sugars, organic acids and amino acids; the wheat metabolome played important roles to enhance the drought tolerance of shoots...
April 2018: AoB Plants
https://www.readbyqxmd.com/read/29621424/oxidative-and-genotoxic-damages-in-plants-in-response-to-heavy-metal-stress-and-maintenance-of-genome-stability
#17
Subhajit Dutta, Mehali Mitra, Puja Agarwal, Kalyan Mahapatra, Sayanti De, Upasana Sett, Sujit Roy
Plants, being sessile in nature, are constantly exposed to various environmental stresses, such as solar UV radiations, soil salinity, drought and desiccation, rehydration, low and high temperatures and other vast array of air and soil borne chemicals, industrial waste products, metals and metalloids. These agents, either directly or indirectly via the induction of oxidative stress and overproduction of reactive oxygen species (ROS), frequently perturb the chemical or physical structures of DNA and induce both cytotoxic or genotoxic stresses...
April 5, 2018: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/29618772/phosphorous-fertilization-alleviates-drought-effects-on-alnus-cremastogyne-by-regulating-its-antioxidant-and-osmotic-potential
#18
Akash Tariq, Kaiwen Pan, Olusanya Abiodun Olatunji, Corina Graciano, Zilong Li, Feng Sun, Lin Zhang, Xiaogang Wu, Wenkai Chen, Dagang Song, Dan Huang, Tan Xue, Aiping Zhang
Alnus cremastogyne, a broad-leaved tree endemic to south-western China, has both commercial and restoration importance. However, little is known of its morphological, physiological and biochemical responses to drought and phosphorous (P) application. A randomized experimental design was used to investigate how drought affected A. cremastogyne seedlings, and the role that P applications play in these responses. Drought had significant negative effects on A. cremastogyne growth and metabolism, as revealed by reduced biomass (leaf, shoot and root), leaf area, stem diameter, plant height, photosynthetic rate, leaf relative water content, and photosynthetic pigments, and a weakened antioxidative defence mechanism and high lipid peroxidation level...
April 4, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29617413/intraspecific-differences-in-long-term-drought-tolerance-in-perennial-ryegrass
#19
Daliya Cyriac, Rainer W Hofmann, Alan Stewart, P Sathish, Christopher S Winefield, Derrick J Moot
Lolium perenne L. (perennial ryegrass) is the most important pasture grass species in temperate regions of the world. However, its growth is restricted in summer dry environments. Germplasm screening can be used to identify accessions or individual plants for incorporation into breeding programs for drought tolerance. We selected nine perennial ryegrass accessions from different global origins and from a range of climatic and environmental conditions. In addition, the perennial ryegrass cultivar 'Grasslands Impact' was chosen as a reference...
2018: PloS One
https://www.readbyqxmd.com/read/29616395/expression-of-tagf14b-a-14-3-3-adaptor-protein-gene-from-wheat-enhances-drought-and-salt-tolerance-in-transgenic-tobacco
#20
Yang Zhang, Hongyan Zhao, Shiyi Zhou, Yuan He, Qingchen Luo, Fan Zhang, Ding Qiu, Jialu Feng, Qiuhui Wei, Lihong Chen, Mingjie Chen, Junli Chang, Guangxiao Yang, Guangyuan He
TaGF14b enhances tolerance to multiple stresses through ABA signaling pathway by altering physiological and biochemical processes, including ROS-scavenging system, stomatal closure, compatible osmolytes, and stress-related gene expressions in tobaccos. The 14-3-3 proteins are involved in plant growth, development, and in responding to abiotic stresses. However, the precise functions of 14-3-3s in responding to drought and salt stresses remained unclear, especially in wheat. In this study, a 14-3-3 gene from wheat, designated TaGF14b, was cloned and characterized...
April 3, 2018: Planta
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