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https://www.readbyqxmd.com/read/28647758/a-meta-analysis-of-quantitative-trait-loci-for-abiotic-and-biotic-stress-resistance-in-tetraploid-cotton
#1
Abdelraheem Abdelraheem, Feng Liu, Mingzhou Song, Jinfa F Zhang
The number and location of mapped quantitative trait loci (QTL) depend on genetic populations and testing environments. The identification of consistent QTL across genetic backgrounds and environments is a pre-requisite to marker-assisted selection. This study analyzed a total of 661 abiotic and biotic stress resistance QTL based on our previous work and other publications using the meta-analysis software Biomercator. It identified chromosomal regions containing QTL clusters for different resistance traits and hotspots for a particular resistance trait in cotton from 98 QTL for drought tolerance under greenhouse (DT) and 150 QTL in field conditions (FDT), 80 QTL for salt tolerance in the greenhouse conditions (ST), 201 QTL for resistance to Verticillium wilt (VW, Verticillium dahliae), 47 QTL for resistance to Fusarium wilt (FW, Fusarium oxysporum f...
June 24, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/28647119/in-vitro-pgpr-properties-and-osmotic-tolerance-of-different-azospirillum-native-strains-and-their-effects-on-growth-of-maize-under-drought-stress
#2
Julia E García, Guillermo Maroniche, Cecilia Creus, Ramón Suárez-Rodríguez, José Augusto Ramirez-Trujillo, María D Groppa
Osmotic variations in the soil can affect bacterial growth diminishing the number of inoculated bacteria. In a scenario of water deficit having tolerant bacteria would be beneficial to achieve a better response of the plant to stress. Thus, selection of more resistant bacteria could be useful to design new inoculants to be used in arid zones. In this sense, a group of Azospirillum isolates deposited in INTA collection was characterized in order to select strains tolerant to osmotic stress. The results obtained demonstrated that Az19 strain has similar in vitro PGPR characteristics to Az39, the most used strain in Argentina for inoculants industries, with the advantage of a better tolerance to osmotic and salt stress...
September 2017: Microbiological Research
https://www.readbyqxmd.com/read/28646139/genome-wide-identification-of-major-intrinsic-proteins-in-glycine-soja-and-characterization-of-gmtip2-1-function-under-salt-and-water-stress
#3
Da-Yong Zhang, Manoj Kumar, Ling Xu, Qun Wan, Yi-Hong Huang, Zhao-Long Xu, Xiao-Lan He, Jin-Biao Ma, Girdhar K Pandey, Hong-Bo Shao
In different plant species, aquaporins (AQPs) facilitate water movement by regulating root hydraulic conductivity under diverse stress conditions such as salt and water stresses. To improve survival and yield of crop plants, a detailed understanding of stress responses is imperative and required. We used Glycine soja genome as a tool to study AQPs, considering it shows abundant genetic diversity and higher salt environment tolerance features and identified 62 Gs AQP genes. Additionally, this study identifies major aquaporins responsive to salt and drought stresses in soybean and elucidates their mode of action through yeast two-hybrid assay and BiFC...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28642782/genes-of-acyl-carrier-protein-family-show-different-expression-profiles-and-overexpression-of-acyl-carrier-protein-5-modulates-fatty-acid-composition-and-enhances-salt-stress-tolerance-in-arabidopsis
#4
Jiexue Huang, Caiwen Xue, Han Wang, Lisai Wang, Wolfgang Schmidt, Renfang Shen, Ping Lan
Acyl carrier proteins (ACPs) are a group of small acidic proteins functioning as important cofactors in the de novo synthesis of fatty acids. In Arabidopsis, ACPs are encoded by a small gene family comprising five plastid members, AtACP1 to AtACP5, and three mitochondrial members. The biological functions and the transcriptional responses to abiotic stresses of most AtACPs have yet to be elucidated. The present study extends previous findings and provides new knowledge on the function of ACPs by examining the responses of AtACP-encoding genes to several abiotic stresses and, in particular, the role of AtACP5 in the adaptation to salt stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642778/characterization-of-salt-induced-epigenetic-segregation-by-genome-wide-loss-of-heterozygosity-and-its-association-with-salt-tolerance-in-rice-oryza-sativa-l
#5
Min Li, Wen-Sheng Wang, Yun-Long Pang, Jessica R Domingo, Jauhar Ali, Jian-Long Xu, Bin-Ying Fu, Elec B Venus, Zhi-Kang Li
In a breeding effort to develop salt tolerant (ST) rice varieties by designed QTL pyramiding, large numbers of progenies derived from four crosses between salt- or drought- tolerant BC2F5 IR64 introgression lines, were subjected to severe salt stress, resulting in 422 ST plants. The progeny testing of the selected F3 lines under more severe salt stress resulted in identification of 16 promising homozygous lines with high levels of ST. Genetic characterization of the 422 ST F3 progeny and 318 random F2 plants from the same four crosses using 105 segregating SSR markers lead to three interesting discoveries: (1) salt stress can induce genome-wide epigenetic segregation (ES) characterized by complete loss of heterozygosity (LOH) and nearly complete loss of an allele (LOA) in the F3 progenies of four rice populations in a single generation; (2) ∼25% of the stress-induced ES loci were transgenerational and inherited from their salt- and drought- selected parents; and (3) the salt-induced LOH and LOA loci (regions) appeared to contain genes/alleles associated with ST and/or drought tolerance...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642765/genome-wide-identification-of-ap2-erf-transcription-factors-in-cauliflower-and-expression-profiling-of-the-erf-family-under-salt-and-drought-stresses
#6
Hui Li, Yu Wang, Mei Wu, Lihong Li, Cong Li, Zhanpin Han, Jiye Yuan, Chengbin Chen, Wenqin Song, Chunguo Wang
The AP2/ERF transcription factors (TFs) comprise one of the largest gene superfamilies in plants. These TFs perform vital roles in plant growth, development, and responses to biotic and abiotic stresses. In this study, 171 AP2/ERF TFs were identified in cauliflower (Brassica oleracea L. var. botrytis), one of the most important horticultural crops in Brassica. Among these TFs, 15, 9, and 1 TFs were classified into the AP2, RAV, and Soloist family, respectively. The other 146 TFs belong to ERF family, which were further divided into the ERF and DREB subfamilies...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28640975/nac-transcription-factor-jungbrunnen1-enhances-drought-tolerance-in-tomato
#7
Venkatesh P Thirumalaikumar, Vikas Devkar, Nikolay Mehterov, Shawkat Ali, Rengin Ozgur, Ismail Turkan, Bernd Mueller-Roeber, Salma Balazadeh
Water deficit (drought stress) massively restricts plant growth and the yield of crops; reducing the deleterious effects of drought is therefore of high agricultural relevance. Drought triggers diverse cellular processes including the inhibition of photosynthesis, the accumulation of cell-damaging reactive oxygen species, and gene expression reprogramming, besides others. Transcription factors (TF) are central regulators of transcriptional reprogramming and expression of many TF genes is affected by drought, including members of the NAC family...
June 22, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28640834/overexpression-of-gmfdl19-enhances-tolerance-to-drought-and-salt-stresses-in-soybean
#8
Yuanyuan Li, Quanzhen Chen, Haiyang Nan, Xiaoming Li, Sijia Lu, Xiaohui Zhao, Baohui Liu, Changhong Guo, Fanjiang Kong, Dong Cao
The basic leucine zipper (bZIP) family of transcription factors plays an important role in the growth and developmental process as well as responds to various abiotic stresses, such as drought and high salinity. Our previous work identified GmFDL19, a bZIP transcription factor, as a flowering promoter in soybean, and the overexpression of GmFDL19 caused early flowering in transgenic soybean plants. Here, we report that GmFDL19 also enhances tolerance to drought and salt stress in soybean. GmFDL19 was determined to be a group A member, and its transcription expression was highly induced by abscisic acid (ABA), polyethylene glycol (PEG 6000) and high salt stresses...
2017: PloS One
https://www.readbyqxmd.com/read/28639116/integration-of-transcriptomic-and-metabolic-data-reveals-hub-transcription-factors-involved-in-drought-stress-response-in-sunflower-helianthus-annuus-l
#9
Sebastián Moschen, Julio A Di Rienzo, Janet Higgins, Takayuki Tohge, Mutsumi Watanabe, Sergio González, Máximo Rivarola, Francisco García-García, Joaquin Dopazo, H Esteban Hopp, Rainer Hoefgen, Alisdair R Fernie, Norma Paniego, Paula Fernández, Ruth A Heinz
By integration of transcriptional and metabolic profiles we identified pathways and hubs transcription factors regulated during drought conditions in sunflower, useful for applications in molecular and/or biotechnological breeding. Drought is one of the most important environmental stresses that effects crop productivity in many agricultural regions. Sunflower is tolerant to drought conditions but the mechanisms involved in this tolerance remain unclear at the molecular level. The aim of this study was to characterize and integrate transcriptional and metabolic pathways related to drought stress in sunflower plants, by using a system biology approach...
June 21, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28638833/isolation-and-abiotic-stress-resistance-analyses-of-a-catalase-gene-from-ipomoea-batatas-l-lam
#10
Bin Yong, Xiaoyan Wang, Pan Xu, Haiyan Zheng, Xueting Fei, Zixi Hong, Qinqin Ma, Yuzhi Miao, Xianghua Yuan, Yusong Jiang, Huanhuan Shao
As an indicator of the antioxidant capability of plants, catalase can detoxify reactive oxygen species (ROS) generated by environmental stresses. Sweet potato is one of the top six most important crops in the world. However, its catalases remain largely unknown. In this study, a catalase encoding gene, IbCAT2 (accession number: KY615708), was identified and cloned from sweet potato cv. Xushu 18. It contained a 1479 nucleotides' open reading frame (ORF). S-R-L, Q-K-L, and a putative calmodulin binding domain were located at the C-terminus of IbCAT2, which suggests that IbCAT2 could be a peroxisomal catalase...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28638395/modulation-of-antioxidant-defense-system-is-associated-with-combined-drought-and-heat-stress-tolerance-in-citrus
#11
Sara I Zandalinas, Damián Balfagón, Vicent Arbona, Aurelio Gómez-Cadenas
Drought and high temperatures are two major abiotic stress factors that often occur simultaneously in nature, affecting negatively crop performance and yield. Moreover, these environmental challenges induce oxidative stress in plants through the production of reactive oxygen species (ROS). Carrizo citrange and Cleopatra mandarin are two citrus genotypes with contrasting ability to cope with the combination of drought and heat stress. In this work, a direct relationship between an increased antioxidant activity and stress tolerance is reported...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28638069/global-profiling-of-phytohormone-dynamics-during-combined-drought-and-pathogen-stress-in-arabidopsis-thaliana-reveals-aba-and-ja-as-major-regulators
#12
Aarti Gupta, Hiroshi Hisano, Yuko Hojo, Takakazu Matsuura, Yoko Ikeda, Izumi C Mori, Muthappa Senthil-Kumar
Global transcriptome studies demonstrated the existence of unique plant responses under combined stress which are otherwise not seen during individual stresses. In order to combat combined stress plants use signaling pathways and 'cross talk' mediated by hormones involved in stress and growth related processes. However, interactions among hormones' pathways in combined stressed plants are not yet known. Here we studied dynamics of different hormones under individual and combined drought and pathogen infection in Arabidopsis thaliana by liquid chromatography-mass spectrometry (LC-MS) based profiling...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637347/mechanisms-underlying-the-long-term-survival-of-the-monocot-dracaena-marginata-under-drought-conditions
#13
Radek Jupa, Roman Plichta, Zuzana Paschová, Nadezhda Nadezhdina, Roman Gebauer
Efficient water management is essential for the survival of vascular plants under drought stress. While interrelations among drought stress, plant anatomy and physiological functions have been described in woody dicots, similar research is very limited for non-palm arborescent and shrubby monocots despite their generally high drought tolerance. In this study, potted transplants of Dracaena marginata Lam. in primary growth stage were exposed to several short- and long-term drought periods. Continuous measurements of sap flow and stem diameter, the evaluation of capacitance and leaf conductance, the quantification of non-structural carbohydrates (NSC), and organ-specific anatomical analyses were performed to reveal the mechanisms promoting plant resistance to limited soil moisture...
June 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28637218/genome-wide-characterization-and-expression-analysis-enables-identification-of-abiotic-stress-responsive-myb-transcription-factors-in-cassava-manihot-esculenta
#14
Meng-Bin Ruan, Xin Guo, Bin Wang, Yi-Ling Yang, Wen-Qi Li, Xiao-Ling Yu, Peng Zhang, Ming Peng
The myeloblastosis (MYB) transcription factor superfamily is the largest transcription factor family in plants, playing different roles during stress response. However, abiotic stress-responsive MYB transcription factors have not been systematically studied in cassava (Manihot esculenta), an important tropical tuber root crop. In this study, we used a genome-wide transcriptome analysis to predict 299 putative MeMYB genes in the cassava genome. Under drought and cold stresses, many MeMYB genes exhibited different expression patterns in cassava leaves, indicating that these genes might play a role in abiotic stress responses...
June 20, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28634483/elicitor-induced-biochemical-and-molecular-manifestations-to-improve-drought-tolerance-in-rice-oryza-sativa-l-through-seed-priming
#15
Mahesh K Samota, Minnu Sasi, Monika Awana, Om P Yadav, S V Amitha Mithra, Aruna Tyagi, Suresh Kumar, Archana Singh
Rice (Oryza sativa L.) is one of the major grain cereals of the Indian subcontinent which face water-deficit stress for their cultivation. Seed-priming has been reported to be a useful approach to complement stress responses in plants. In the present study, seed-priming with hormonal or chemical elicitor [viz. methyl jasmonate (MJ), salicylic acid (SA), paclobutrazol (PB)] showed significant increase in total phenolic content, antioxidant activity and expression of Rice Drought-responsive (RD1 and RD2) genes (of AP2/ERF family) in contrasting rice genotypes (Nagina-22, drought-tolerant and Pusa Sugandh-5, drought-sensitive) under drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28633427/genotypic-variation-in-tolerance-to-drought-stress-is-highly-coordinated-with-hydraulic-conductivity-photosynthesis-interplay-and-aquaporin-expression-in-field-grown-mulberry-morus-spp
#16
Kanubothula Sitarami Reddy, Kalva Madhana Sekhar, Attipalli Ramachandra Reddy
Hydraulic conductivity quantifies the efficiency of a plant to transport water from root to shoot and is a major constriction on leaf gas exchange physiology. Mulberry (Morus spp.) is the most economically important crop for sericulture industry. In this study, we demonstrate a finely coordinated control of hydraulic dynamics on leaf gas exchange characteristics in 1-year-old field-grown mulberry genotypes (Selection-13 (S13); Kollegal Local (KL) and Kanva-2 (K2)) subjected to water stress by withholding water for 20 days and subsequent recovery for 7 days...
June 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28633111/drought-avoiding-plants-with-low-water-use-can-achieve-high-rainfall-retention-without-jeopardising-survival-on-green-roofs
#17
Christopher Szota, Claire Farrell, Nicholas S G Williams, Stefan K Arndt, Tim D Fletcher
Green roofs are increasingly being used among the suite of tools designed to reduce the volume of surface water runoff generated by cities. Plants provide the primary mechanism for restoring the rainfall retention capacity of green roofs, but selecting plants with high water use is likely to increase drought stress. Using empirically-derived plant physiological parameters, we used a water balance model to assess the trade-off between rainfall retention and plant drought stress under a 30-year climate scenario...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28633087/in-field-study-on-traditional-italian-tomato-landraces-the-constitutive-activation-of-the-ros-scavenging-machinery-reduces-effects-of-drought-stress
#18
Simone Landi, Alessia De Lillo, Roberta Nurcato, Stefania Grillo, Sergio Esposito
The involvement and the efficiency of the antioxidants scavenging system upon drought were examined by comparing traditional tomato landraces with respect to an industrial commercial genotype (Red Setter); for the first time, comprehensive analyses of physiological, biochemical and molecular parameters were investigated directly under real field conditions, in a typical agricultural environment of Southern Italy. The characterization of the responses upon drought evidenced peculiar changes in stomatal conductance, ascorbate peroxidase and catalase activities and expression in drought tolerant tomato landraces, with respect to the industrial genotype...
June 13, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28633086/beneficial-effects-of-melatonin-in-overcoming-drought-stress-in-wheat-seedlings
#19
Guibin Cui, Xiaoxiao Zhao, Shudong Liu, Fengli Sun, Chao Zhang, Yajun Xi
Melatonin plays an important role in abiotic stress in plant, but its role in wheat drought tolerance is less known. To verify its role, wheat seedlings (Triticum aestivum L. 'Yan 995') at 60% and 40% of field capacity were treated with 500 μM melatonin in this study. Melatonin treatment significantly enhanced the drought tolerance of wheat seedlings, as demonstrated by decreased membrane damage, more intact grana lamella of chloroplast, higher photosynthetic rate, and maximum efficiency of photosystem II, as well as higher cell turgor and water holding capacity in melatonin-treated seedlings...
June 15, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28630801/characterization-of-the-transcriptome-and-est-ssr-development-in-boea-clarkeana-a-desiccation-tolerant-plant-endemic-to-china
#20
Ying Wang, Kun Liu, De Bi, Shoubiao Zhou, Jianwen Shao
BACKGROUND: Desiccation-tolerant (DT) plants can recover full metabolic competence upon rehydration after losing most of their cellular water (>95%) for extended periods of time. Functional genomic approaches such as transcriptome sequencing can help us understand how DT plants survive and respond to dehydration, which has great significance for plant biology and improving the drought tolerance of crops. Boea clarkeana Hemsl. (Gesneriaceae) is a DT dicotyledonous herb. Its genomic sequences characteristics remain unknown...
2017: PeerJ
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