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https://www.readbyqxmd.com/read/28650654/evaluation-of-a-rapid-method-for-screening-heat-stress-tolerance-using-three-korean-wheat-triticum-aestivum-l-cultivars
#1
Hai An Truong, Chan Young Jeong, Won Je Lee, Byung Cheon Lee, Namhyun Chung, Chon-Sik Kang, Young-Keun Cheong, Suk-Whan Hong, Hojoung Lee
Thermotolerance in plants is a topic of concern given the current trends in global warming. Here, we aimed to develop a rapid and reproducible screening method for selection of heat stress- tolerant wheat varieties to expedite the breeding process. We tested the robustness of the screen in three Korean wheat cultivars, 'BackJung', 'KeumKang', and 'ChoKyeong'. We showed that 4-day-old seedlings of 'KeumKang' had the highest survival rates after a 45C treatment for 20 h. Moreover, the ability to retain chlorophyll and antioxidant activity was also highest in 'KeumKang'...
June 26, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28649918/molecular-analysis-of-hsp70-mechanisms-in-plants-and-their-function-in-response-to-stress
#2
Magaji G Usman, Mohd Y Rafii, Mohammad Y Martini, Oladosu A Yusuff, Mohd R Ismail, Gous Miah
Studying the strategies of improving abiotic stress tolerance is quite imperative and research under this field will increase our understanding of response mechanisms to abiotic stress such as heat. The Hsp70 is an essential regulator of protein having the tendency to maintain internal cell stability like proper folding protein and breakdown of unfolded proteins. Hsp70 holds together protein substrates to help in movement, regulation, and prevent aggregation under physical and or chemical pressure. However, this review reports the molecular mechanism of heat shock protein 70 kDa (Hsp70) action and its structural and functional analysis, research progress on the interaction of Hsp70 with other proteins and their interaction mechanisms as well as the involvement of Hsp70 in abiotic stress responses as an adaptive defense mechanism...
June 25, 2017: Biotechnology & Genetic Engineering Reviews
https://www.readbyqxmd.com/read/28649264/genome-wide-analysis-of-the-pvhsp20-family-in-switchgrass-motif-genomic-organization-and-identification-of-stress-or-developmental-related-hsp20s
#3
Haidong Yan, Ailing Zhang, Jing Chen, Xiaoyan He, Bin Xu, Guanqi Xie, Zhiming Miao, Xinquan Zhang, Linkai Huang
Hsp20 proteins exist in all plant species and represent the most abundant small heat shock proteins (sHSPs) in plants. Hsp20s were known as chaperones maintaining cellular homeostasis during heat or other kinds of abiotic stresses. The objective of this study was to understand the phylogenetic relationship, genomic organization, diversification of motif modules, genome localization, expression profiles, and interaction networks of switchgrass (Panicum virgatum L.) Hsp20s (PvHsp20s). A total of 63 PvHsp20s were identified with their consensus as well as unique ACD motifs and gene structures analyzed...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28649263/survey-of-high-throughput-rna-seq-data-reveals-potential-roles-for-lncrnas-during-development-and-stress-response-in-bread-wheat
#4
Shumayla, Shailesh Sharma, Mehak Taneja, Shivi Tyagi, Kashmir Singh, Santosh K Upadhyay
Long non-coding RNAs (lncRNAs) are a family of regulatory RNAs that play essential role in the various developmental processes and stress responses. Recent advances in sequencing technology and computational methods enabled identification and characterization of lncRNAs in certain plant species, but they are less known in Triticum aestivum (bread wheat). Herein, we analyzed 52 RNA seq data (>30 billion reads) and identified 44,698 lncRNAs in T. aestivum genome, which were characterized in comparison to the coding sequences (mRNAs)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28644899/new-insights-in-dehydration-stress-behavior-of-two-maize-hybrids-using-advanced-distributed-reactivity-model-drm-responses-to-the-impact-of-24-epibrassinolide
#5
Hadi Waisi, Bojan Janković, Marija Janković, Bogdan Nikolić, Ivica Dimkić, Blažo Lalević, Vera Raičević
Proposed distributed reactivity model of dehydration for seedling parts of two various maize hybrids (ZP434, ZP704) was established. Dehydration stresses were induced thermally, which is also accompanied by response of hybrids to heat stress. It was found that an increased value of activation energy counterparts within radicle dehydration of ZP434, with a high concentration of 24-epibrassinolide (24-EBL) at elevated operating temperatures, probably causes activation of diffusion mechanisms in cutin network and may increases likelihood of formation of free volumes, large enough to accommodate diffusing molecule...
2017: PloS One
https://www.readbyqxmd.com/read/28642783/ibor-regulates-photosynthesis-under-heat-stress-by-stabilizing-ibpsbp-in-sweetpotato
#6
Le Kang, Ho S Kim, Young S Kwon, Qingbo Ke, Chang Y Ji, Sung-Chul Park, Haeng-Soon Lee, Xiping Deng, Sang-Soo Kwak
The Orange (Or) protein regulates carotenoid biosynthesis and environmental stress in plants. Previously, we reported that overexpression of the sweetpotato [Ipomoea batatas (L.) Lam] Or gene (IbOr) in transgenic Arabidopsis (referred to as IbOr-OX/At) increased the efficiency of photosystem II (PSII) and chlorophyll content after heat shock. However, little is known about the role of IbOr in PSII-mediated protection against abiotic stress. In this study, comparative proteomics revealed that expression of PsbP (an extrinsic subunit of PSII) is up-regulated in heat-treated IbOr-OX/At plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642478/a-novel-plant-e3-ligase-stabilizes-escherichia-coli-heat-shock-factor-%C3%AF-32
#7
Yulong Niu, Xibing Xu, Chengcheng Liu, Tao Wang, Ke Liang, Jianmei Wang, Zhibin Liu, Xufeng Li, Yi Yang
The heat shock response is crucial for organisms against heat-damaged proteins and maintaining homeostasis at a high temperature. Heterologous expression of eukaryotic molecular chaperones protects Escherichia coli from heat stress. Here we report that expression of the plant E3 ligase BnTR1 significantly increases the thermotolerance of E. coli. Different from eukaryotic chaperones, BnTR1 expression induces the accumulation of heat shock factor σ(32) and heat shock proteins. The active site of BnTR1 in E...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28638395/modulation-of-antioxidant-defense-system-is-associated-with-combined-drought-and-heat-stress-tolerance-in-citrus
#8
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/28626614/identification-of-two-cigads-from-caragana-intermedia-and-their-transcriptional-responses-to-abiotic-stresses-and-exogenous-abscisic-acid
#9
Jing Ji, Lingyu Zheng, Jianyun Yue, Xiamei Yao, Ermei Chang, Tiantian Xie, Nan Deng, Lanzhen Chen, Yuwen Huang, Zeping Jiang, Shengqing Shi
BACKGROUND: Glutamate decarboxylase (GAD), as a key enzyme in the γ -aminobutyric acid (GABA) shunt, catalyzes the decarboxylation of L-glutamate to form GABA. This pathway has attracted much interest because of its roles in carbon and nitrogen metabolism, stress responses, and signaling in higher plants. The aim of this study was to isolate and characterize genes encoding GADs from Caragana intermedia, an important nitrogen-fixing leguminous shrub. METHODS: Two full-length cDNAs encoding GADs (designated as CiGAD1 and CiGAD2) were isolated and characterized...
2017: PeerJ
https://www.readbyqxmd.com/read/28622347/rna-guided-transcriptional-activation-via-crispr-dcas9-mimics-overexpression-phenotypes-in-arabidopsis
#10
Jong-Jin Park, Emma Dempewolf, Wenzheng Zhang, Zeng-Yu Wang
Clustered regularly interspaced short palindromic repeats (CRISPR) and the CRISPR associated protein 9 (Cas9) system allows effective gene modification through RNA-guided DNA targeting. The Cas9 has undergone a series of functional alterations from the original active endonuclease to partially or completely deactivated Cas9. The catalytically deactivated Cas9 (dCas9) offers a platform to regulate transcriptional expression with the addition of activator or repressor domains. We redesigned a CRISPR/Cas9 activation system by adding the p65 transactivating subunit of NF-kappa B and a heat-shock factor 1 (HSF) activation domain to dCas9 bound with the VP64 (tetramer of VP16) activation domain for application in plants...
2017: PloS One
https://www.readbyqxmd.com/read/28615006/brief-temperature-stress-during-reproductive-stages-alters-meiotic-recombination-and-somatic-mutation-rates-in-the-progeny-of-arabidopsis
#11
Ramswaroop Saini, Amit Kumar Singh, Shanmuhapreya Dhanapal, Thoufeequl Hakeem Saeed, Geoffrey J Hyde, Ramamurthy Baskar
BACKGROUND: Plants exposed to environmental stresses draw upon many genetic and epigenetic strategies, with the former sometimes modulated by the latter. This can help the plant, and its immediate progeny, at least, to better endure the stress. Some evidence has led to proposals that (epi) genetic changes can be both selective and sustainably heritable, while other evidence suggests that changes are effectively stochastic, and important only because they induce genetic variation. One type of stress with an arguably high level of stochasticity in its effects is temperature stress...
June 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28614601/genome-wide-transcriptional-reprogramming-in-the-seagrass-cymodocea-nodosa-under-experimental-ocean-acidification
#12
Miriam Ruocco, Francesco Musacchia, Irene Olivé, Monya M Costa, Isabel Barrote, Rui Santos, Remo Sanges, Gabriele Procaccini, João Silva
Here we report the first use of massive scale RNA-Sequencing to explore seagrass response to CO2 -driven ocean acidification (OA). Large-scale gene expression changes in the seagrass Cymodocea nodosa occurred at CO2 levels projected by the end of the century. C. nodosa transcriptome was obtained using Illumina RNA-Seq technology and de novo assembly, and differential gene expression was explored in plants exposed to short-term high CO2 / low pH conditions. At high pCO2 , there was a significant increased expression of transcripts associated to photosynthesis, including light reaction functions and CO2 fixation, and also to respiratory pathways, specifically for enzymes involved in glycolysis, in the tricarboxylic acid cycle and in the energy metabolism of the mitochondrial electron transport...
June 14, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28608391/the-chloroplast-localized-small-heat-shock-protein-hsp21-associates-with-the-thylakoid-membranes-in-heat-stressed-plants
#13
Katja Bernfur, Gudrun Rutsdottir, Cecilia Emanuelsson
The small heat shock protein (sHsp) chaperones are crucial for cell survival and can prevent aggregation of client proteins that partially unfold under destabilizing conditions. Most investigations on the chaperone activity sHsps are based on a limited set of thermosensitive model substrate client proteins since the endogenous targets are often not known. There is a high diversity among sHsps, with a single conserved β-sandwich fold domain defining the family, the α-crystallin domain, whereas the N-terminal and C-terminal regions are highly variable in length and sequence among various sHsps and conserved only within orthologues...
June 12, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28603666/in-silico-analysis-reveals-widespread-presence-of-three-gene-families-mapk-mapkk-and-mapkkk-of-the-mapk-cascade-from-crop-plants-of-solanaceae-in-comparison-to-the-distantly-related-syntenic-species-from-rubiaceae-coffee
#14
Hira Iftikhar, Nayab Naveed, Nasar Virk, Muhammad Faraz Bhatti, Fengming Song
Mitogen-activated protein kinases (MAPKs) are an important family of genes which play roles in vital plant processes, and they also help in coping against various kinds of environmental stresses including abiotic as well as biotic factors. The advancement of genomics calls for the annotation, identification, and detailed processing of the essential gene families in plants in order to provide insights into the importance of their central roles as well as for providing the basis for making their growth vigorous even under stressed conditions and, ultimately, to benefit from them by foreseeing the potential threats to their growth...
2017: PeerJ
https://www.readbyqxmd.com/read/28596782/chloroplast-or-mitochondria-targeted-dead-box-rna-helicases-play-essential-roles-in-organellar-rna-metabolism-and-abiotic-stress-responses
#15
REVIEW
Ghazala Nawaz, Hunseung Kang
The yields and productivity of crops are greatly diminished by various abiotic stresses, including drought, cold, heat, and high salinity. Chloroplasts and mitochondria are cellular organelles that can sense diverse environmental stimuli and alter gene expression to cope with adverse environmental stresses. Organellar gene expression is mainly regulated at posttranscriptional levels, including RNA processing, intron splicing, RNA editing, RNA turnover, and translational control, during which a variety of nucleus-encoded RNA-binding proteins (RBPs) are targeted to chloroplasts or mitochondria where they play essential roles in organellar RNA metabolism...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28593746/long-term-measurements-of-chlorophyll-a-fluorescence-using-the-jip-test-show-that-combined-abiotic-stresses-influence-the-photosynthetic-performance-of-the-perennial-ryegrass-lolium-perenne-in-a-managed-temperate-grassland
#16
Anthony Digrado, Aurélie Bachy, Ahsan Mozaffar, Niels Schoon, Filippo Bussotti, Crist Amelynck, Anne-Catherine Dalcq, Marie-Laure Fauconnier, Marc Aubinet, Bernard Heinesch, Patrick du Jardin, Pierre Delaplace
Several experiments have highlighted the complexity of stress interactions involved in plant response. The impact in field conditions of combined environmental constraints on the mechanisms involved in plant photosynthetic response, however, remains understudied. In a long-term field study performed in a managed grassland, we investigated the photosynthetic apparatus response of the perennial ryegrass (Lolium perenne) to environmental constraints and its ability to recover and acclimatize. Frequent field measurements of chlorophyll ɑ fluorescence (ChlF) were made in order to determine the photosynthetic performance response of a population of L...
June 8, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28587227/photoreceptor-phyb-involved-in-arabidopsis-temperature-perception-and-heat-tolerance-formation
#17
Junyi Song, Qijun Liu, Biru Hu, Wenjian Wu
The influence of temperature on plants is essential. However, our knowledge on the intricate regulation process underlying heat stress (HS) response in plants is limited. Recently, information about thermal sensors in vivo has begun to emerge. In this study, another primary environmental stimulus, light, was verified once again to work with temperature synergistically on plants, through the modulation of numerous biological processes. With the application of transcriptomic analysis, a substantial number of heat-responsive genes were detected involved in both light- and phytohormone-mediated pathways in Arabidopsis...
June 5, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28584974/high-resolution-mapping-of-qtls-for-heat-tolerance-in-rice-using-a-5k-snp-array
#18
Shanmugavadivel Ps, Amitha Mithra Sv, Chandra Prakash, Ramkumar Mk, Ratan Tiwari, Trilochan Mohapatra, Nagendra Kumar Singh
BACKGROUND: Heat stress is one of the major abiotic threats to rice production, next to drought and salinity stress. Incidence of heat stress at reproductive phase of the crop results in abnormal pollination leading to floret sterility, low seed set and poor grain quality. Identification of QTLs and causal genes for heat stress tolerance at flowering will facilitate breeding for improved heat tolerance in rice. In the present study, we used 272 F8 recombinant inbred lines derived from a cross between Nagina22, a well-known heat tolerant Aus cultivar and IR64, a heat sensitive popular Indica rice variety to map the QTLs for heat tolerance...
December 2017: Rice
https://www.readbyqxmd.com/read/28580238/rapid-breeding-and-varietal-replacement-are-critical-to-adaptation-of-cropping-systems-in-the-developing-world-to-climate-change
#19
REVIEW
Gary N Atlin, Jill E Cairns, Biswanath Das
Plant breeding is a key mechanism for adaptation of cropping systems to climate change. Much discussion of breeding for climate change focuses on genes with large effects on heat and drought tolerance, but phenology and stress tolerance are highly polygenic. Adaptation will therefore mainly result from continually adjusting allele frequencies at many loci through rapid-cycle breeding that delivers a steady stream of incrementally improved cultivars. This will require access to elite germplasm from other regions, shortened breeding cycles, and multi-location testing systems that adequately sample the target population of environments...
March 2017: Global Food Security
https://www.readbyqxmd.com/read/28579997/physiological-effect-of-cutting-height-and-high-temperature-on-regrowth-vigor-in-orchardgrass
#20
Gordon B Jones, Jasper B Alpuerto, Benjamin F Tracy, Takeshi Fukao
Producers of orchardgrass (Dactylis glomerata L.) hay in the Mid-Atlantic US have experienced a reduction in regrowth vigor and a decline in the persistence of their swards. The common management practice for the region is to harvest the first growth of hay by cutting at 2.5-7.5 cm height in May or June. We hypothesize that high temperature and low cutting height interact to limit the regrowth rate. To test this, orchardgrass plants were cut to either 2.5 or 7.5 cm and then placed into environmentally controlled chambers with a constant temperature of 20 or 35°C...
2017: Frontiers in Plant Science
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