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https://www.readbyqxmd.com/read/29134788/thermal-acclimation-in-arabidopsis-lyrata-genotypic-costs-and-transcriptional-changes
#1
Guillaume Wos, Yvonne Willi
Frost and heat events can be challenging for sessile organisms that cannot escape thermal extremes. However, adverse effects of thermal stress on fitness may be reduced by pre-exposure to cold or heat, a process known as acclimation. To understand the ecological and evolutionary implications of acclimation, we investigated (1) the reduction in performance due to stress pre-exposure, (2) the magnitude of increased leaf resistance to subsequent stress, (3) the costs of acclimation, and (4) the genes differing in expression due to stress pre-exposure...
November 13, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29132315/comprehensive-genomic-analysis-of-the-cngc-gene-family-in-brassica-oleracea-novel-insights-into-synteny-structures-and-transcript-profiles
#2
Kaleem U Kakar, Zarqa Nawaz, Khadija Kakar, Essa Ali, Abdulwareth A Almoneafy, Raqeeb Ullah, Xue-Liang Ren, Qing-Yao Shu
BACKGROUND: The cyclic nucleotide-gated ion channel (CNGC) family affects the uptake of cations, growth, pathogen defence, and thermotolerance in plants. However, the systematic identification, origin and function of this gene family has not been performed in Brassica oleracea, an important vegetable crop and genomic model organism. RESULTS: In present study, we identified 26 CNGC genes in B. oleracea genome, which are non-randomly localized on eight chromosomes, and classified into four major (I-IV) and two sub-groups (i...
November 13, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29123463/switchgrass-pvdreb1c-plays-opposite-roles-in-plant-cold-and-salt-tolerance-in-transgenic-tobacco
#3
Wuwu Wen, Zheni Xie, Guohui Yu, Chengliang Zhao, Jing Zhang, Linkai Huang, Bin Xu, Bingru Huang
Background: The C-repeat-binding factors/DRE-binding factors (CBF/DREBs) comprise a key transcription factor family involved in plant stress tolerance. Yet, there is limited information about switchgrass DREB genes and their functional roles. Results: In this study, four cold-inducible PvDREB1s were identified from switchgrass (Panicum virgatum), among which PvDREB1C was the one responded to cold stress later than the other three PvDREB1s. Yet, ectopic overexpression of PvDREB1C led to significantly compromised, instead of improved cold tolerance in transgenic tobacco...
2018: Hereditas
https://www.readbyqxmd.com/read/29121866/the-roles-of-call-wall-invertase-inhibitor-in-regulating-chilling-tolerance-in-tomato
#4
Xiao-Xia Xu, Qin Hu, Wan-Nian Yang, Ye Jin
BACKGROUND: Hexoses are important metabolic signals that respond to abiotic and biotic stresses. Cold stress adversely affects plant growth and development, limiting productivity. The mechanism by which sugars regulate plant cold tolerance remains elusive. RESULTS: We examined the function of INVINH1, a cell wall invertase inhibitor, in tomato chilling tolerance. Cold stress suppressed the transcription of INVINH1 and increased that of cell wall invertase genes, Lin6 and Lin8 in tomato seedlings...
November 9, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29119268/gene-structure-expression-pattern-and-interaction-of-nuclear-factor-y-family-in-castor-bean-ricinus-communis
#5
Yue Wang, Wei Xu, Zexi Chen, Bing Han, Mohammad E Haque, Aizhong Liu
Nuclear Factor-Y transcription factors, which function in regulating seed development (including storage reservoir accumulation) and responding to abiotic stresses, were identified and characterized in castor bean. Nuclear Factor-Y (NF-Y) transcription factors in plants contain three subunits (NF-YA, NF-YB and NF-YC), and function as a heterodimer or heterotrimer complex in regulating plant growth, development and response to stresses. Castor bean (Ricinus communis, Euphorbiaceae) one of the most economically important non-edible oilseed crops, able to grow in diverse soil conditions and displays high tolerance to abiotic stresses...
November 8, 2017: Planta
https://www.readbyqxmd.com/read/29107244/phytoremediation-of-azoxystrobin-and-its-degradation-products-in-soil-by-p-major-l-under-cold-and-salinity-stress
#6
Ahmed Ali Ali Romeh
Azoxystrobin is a broad-spectrum, systemic and soil-applied fungicide used for crop protection against the four major classes of pathogenic fungi. The use of azoxystrobin use has induced water pollution and ecotoxicological effects upon aquatic organisms, long half-life in soils, as well as heath issues. Such issues may be solved by phytoremediation. Here, we tested the uptake and translocation of azoxystrobin and its degradation products by Plantago major, under cold stress and salt stress. The result demonstrated that azoxystrobin significantly accumulated in P...
October 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29104579/high-ambient-temperature-represses-anthocyanin-biosynthesis-through-degradation-of-hy5
#7
Sara Kim, Geonhee Hwang, Seulgi Lee, Jia-Ying Zhu, Inyup Paik, Thom Thi Nguyen, Jungmook Kim, Eunkyoo Oh
Anthocyanins are flavonoid compounds that protect plant tissues from many environmental stresses including high light irradiance, freezing temperatures, and pathogen infection. Regulation of anthocyanin biosynthesis is intimately associated with environmental changes to enhance plant survival under stressful environmental conditions. Various factors, such as UV, visible light, cold, osmotic stress, and pathogen infection, can induce anthocyanin biosynthesis. In contrast, high temperatures are known to reduce anthocyanin accumulation in many plant species, even drastically in the skin of fruits such as grape berries and apples...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29103092/stress-induced-oryza-sativa-ruvbl1a-is-dna-independent-atpase-and-unwinds-dna-duplex-in-3-to-5-direction
#8
Shabnam K Saifi, Nishat Passricha, Renu Tuteja, Narendra Tuteja
RuvB, a member of AAA+ (ATPases Associated with diverse cellular Activities) superfamily of proteins, is essential, highly conserved and multifunctional in nature as it is involved in DNA damage repair, mitotic assembly, switching of histone variants and assembly of telomerase core complex. RuvB family is widely studied in various systems such as Escherichia coli, yeast, human, Drosophila, Plasmodium falciparum and mouse, but not well studied in plants. We have studied the transcript level of rice homologue of RuvB gene (OsRuvBL1a) under various abiotic stress conditions, and the results suggest that it is upregulated under salinity, cold and heat stress...
November 4, 2017: Protoplasma
https://www.readbyqxmd.com/read/29100789/the-rice-cold-responsive-calcium-dependent-protein-kinase-oscpk17-is-regulated-by-alternative-splicing-and-post-translational-modifications
#9
M Cecília Almadanim, Nuno M Gonçalves, Margarida T G Rosa, Bruno M Alexandre, André M Cordeiro, Mafalda Rodrigues, Nelson J M Saibo, Cláudio M Soares, Célia V Romão, M Margarida Oliveira, Isabel A Abreu
Plant calcium-dependent protein kinases (CDPKs) are key proteins implicated in calcium-mediated signaling pathways of a wide range of biological events in the organism. The action of each particular CDPK is strictly regulated by many mechanisms in order to ensure an accurate signal translation and the activation of the adequate response processes. In this work, we investigated the regulation of a CDPK involved in rice cold stress response, OsCPK17, to better understand its mode of action. We identified two new alternative splicing (AS) mRNA forms of OsCPK17 encoding truncated versions of the protein, missing the CDPK activation domain...
October 31, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29099800/the-tyrosyl-dna-phosphodiesterase-1%C3%AE-tdp1%C3%AE-gene-discloses-an-early-response-to-abiotic-stresses
#10
Maria Elisa Sabatini, Andrea Pagano, Susana Araùjo, Alma Balestrazzi, Anca Macovei
Tyrosyl-DNA phosphodiesterase 1 (Tdp1) is involved in DNA repair pathways as it mends the topoisomerase I-DNA covalent complexes. In plants, a small Tdp1 gene family, composed by Tdp1α and Tdp1β genes, was identified, but the roles of these genes in abiotic stress responses are not fully understood. To investigate their specific stress response patterns, the present study made use of bioinformatic and molecular tools to look into the Tdp1β gene function, so far described only in the plant kingdom, and compare it with Tdp1α gene coding for the canonical, highly conserved α isoform...
November 3, 2017: Genes
https://www.readbyqxmd.com/read/29097722/the-mapkkk-gene-family-in-cassava-genome-wide-identification-and-expression-analysis-against-drought-stress
#11
Jianqiu Ye, Hai Yang, Haitao Shi, Yunxie Wei, Weiwei Tie, Zehong Ding, Yan Yan, Ying Luo, Zhiqiang Xia, Wenquan Wang, Ming Peng, Kaimian Li, He Zhang, Wei Hu
Mitogen-activated protein kinase kinase kinases (MAPKKKs), an important unit of MAPK cascade, play crucial roles in plant development and response to various stresses. However, little is known concerning the MAPKKK family in the important subtropical and tropical crop cassava. In this study, 62 MAPKKK genes were identified in the cassava genome, and were classified into 3 subfamilies based on phylogenetic analysis. Most of MAPKKKs in the same subfamily shared similar gene structures and conserved motifs. The comprehensive transcriptome analysis showed that MAPKKK genes participated in tissue development and response to drought stress...
November 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29096083/gene-network-underlying-the-response-of-harvested-pepper-to-chilling-stress
#12
Sun-Young Shin, Me-Hea Park, Ji-Weon Choi, Ji-Gang Kim
Cold storage is an effective postharvest control strategy to maintain the freshness of vegetables by suppressing respiration. However, subtropical plants including pepper (Capsicum annuum L.) undergo chilling injury. To better understand the molecular mechanisms involved in preventing chilling injury, transcriptome profiling analysis of peppers stored in a cold chamber and treated with 50μM methyl jasmonate (MeJA) and 1μLL(-1) 1-methylcyclopropene as an ethylene reaction inhibitor was performed. A total of 240, 470, and 290 genes were upregulated and 184, 291, and 219 genes down-regulated in cold-, MeJA- and 1-methylcyclopropene-treated peppers, respectively...
October 28, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29093726/the-fad2-gene-in-plants-occurrence-regulation-and-role
#13
REVIEW
Aejaz A Dar, Abhikshit R Choudhury, Pavan K Kancharla, Neelakantan Arumugam
Vegetable oils rich in oleic acid are more desirable than oils rich in polyunsaturated and saturated fatty acids. The biological switch of oleic acid to linoleic acid is facilitated by fatty acid desaturase 2 enzyme that is further classified into FAD2-1, FAD2-2, FAD2-3, and FAD2-4. The genes coding these enzymes have high sequence similarity, but differ mostly in their expression patterns. The seed-type FAD2 genes had evolved independently after segregation by duplication from constitutively expressed FAD2 genes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29091285/successive-evolutionary-steps-drove-pooideae-grasses-from-tropical-to-temperate-regions
#14
Jinshun Zhong, Meghan Robbett, Alfonso Poire, Jill C Preston
Angiosperm adaptations to seasonally cold climates have occurred multiple times independently. However, the observation that less than half of all angiosperm families are represented in temperate latitudes suggests internal constraints on the evolution of cold tolerance/avoidance strategies. Similar to angiosperms as a whole, grasses are primarily tropical, but one major clade, subfamily Pooideae, radiated extensively within temperate regions. It is posited that this Pooideae niche transition was facilitated by an early origin of long-term cold responsiveness around the base of the subfamily, and that a set of more ancient pathways enabled evolution of seasonal cold tolerance...
November 1, 2017: New Phytologist
https://www.readbyqxmd.com/read/29081783/overexpression-of-pyrabactin-resistance-like-abscisic-acid-receptors-enhances-drought-osmotic-and-cold-tolerance-in-transgenic-poplars
#15
Jingling Yu, Haiman Ge, Xiaokun Wang, Renjie Tang, Yuan Wang, Fugeng Zhao, Wenzhi Lan, Sheng Luan, Lei Yang
Abscisic acid (ABA) has been known participate in a wider range of adaptive responses to diverse environmental abiotic stresses such as drought, osmosis, and low temperatures. ABA signaling is initiated by its receptors PYR/PYL/RCARs, a type of soluble proteins with a conserved START domain which can bind ABA and trigger the downstream pathway. Previously, we discovered that poplar (Populus trichocarpa) genome encodes 14 PYR/PYL/RCAR orthologs (PtPYRLs), and two of them, PtPYRL1 and PtPYRL5 have been functionally characterized to positively regulate drought tolerance...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29081782/aba-is-involved-in-regulation-of-cold-stress-response-in-bermudagrass
#16
Xuebing Huang, Haiyan Shi, Zhengrong Hu, Ao Liu, Erick Amombo, Liang Chen, Jinmin Fu
As a representative warm-season grass, Bermudagrass [Cynodon dactylon (L). Pers.] is widely used in turf systems. However, low temperature remarkably limits its growth and distribution. ABA is a crucial phytohormone that has been reported to regulate much important physiological and biochemical processes in plants under abiotic stress. Therefore, the objective of this study was to figure out the effects of ABA on the cold-sensitive (S) and cold-resistant (R) Bermudagrass genotypes response to cold stress. In this study, the plants were treated with 100 μM ABA solution and exposed to 4°C temperature...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29079824/wrky43-regulates-polyunsaturated-fatty-acid-content-and-seed-germination-under-unfavourable-growth-conditions
#17
Katja Geilen, Mareike Heilmann, Stefan Hillmer, Maik Böhmer
Seed germination and postgerminative growth of Arabidopsis thaliana and various other plant species are arrested in response to unfavourable environmental conditions by signalling events involving the phytohormone abscisic acid (ABA). In this study, we showed that loss of the seed-specific WRKY DNA-BINDING PROTEIN 43 (WRKY43) conferred increased tolerance towards high salt, high osmolarity and low temperature during seed germination in Arabidopsis. The wrky43 loss of function lines displayed increased inhibition of seed germination in response to exogenous ABA; whereas lines overexpressing WRKY43 were more tolerant towards exogenous ABA...
October 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29075272/overexpression-of-ntwrky50-increases-resistance-to-ralstonia-solanacearum-and-alters-salicylic-acid-and-jasmonic-acid-production-in-tobacco
#18
Qiuping Liu, Ying Liu, Yuanman Tang, Juanni Chen, Wei Ding
WRKY transcription factors (TFs) modulate plant responses to biotic and abiotic stresses. Here, we characterized a WRKY IIc TF, NtWRKY50, isolated from tobacco (Nicotiana tabacum) plants. The results showed that NtWRKY50 is a nuclear-localized protein and that its gene transcript is induced in tobacco when inoculated with the pathogenic bacterium Ralstonia solanacearum. Overexpression of NtWRKY50 enhanced bacterial resistance, which correlated with enhanced SA and JA/ET signaling genes. However, silencing of the NtWRKY50 gene had no obvious effects on plant disease resistance, implying functional redundancy of NtWRKY50 with other TFs...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29069481/enhanced-cold-tolerance-and-tillering-in-switchgrass-panicum-virgatum-l-by-heterologous-expression-of-osa-mir393a
#19
Yanrong Liu, Kexin Wang, Dayong Li, Jianping Yan, Wanjun Zhang
MicroRNA393 (miR393) family is one of the conserved miRNA families in the plant kingdom. MiR393 was reported to positively regulate rice tillering and abiotic stress resistances through auxin signaling pathway. However, little is known about the function of miR393 in switchgrass ( Panicum virgatum L.), an important bioenergy C4 grass plant. We tested the expression level of miR393 and its four putative target genes ( PvAFB1 , PvAFB2 , PvAFB3 and PvTIR1 ) in switchgrass, and found these genes were all responded to cold stress and exogenous NAA treatment...
October 23, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/29063961/genome-wide-identification-and-expression-analysis-of-the-b-box-gene-family-in-the-apple-malus-domestica-borkh-genome
#20
Xin Liu, Rong Li, Yaqing Dai, Xuesen Chen, Xiaoyun Wang
The B-box proteins (BBXs) are a family of zinc finger proteins containing one/two B-box domain(s). Compared with intensive studies of animal BBXs, investigations of the plant BBX family are limited, though some specific plant BBXs have been demonstrated to act as transcription factors in the regulation of flowering and photomorphogenesis. In this study, using a global search of the apple (Malus domestica Borkh.) genome, a total of 64 members of BBX (MdBBX) were identified. All the MdBBXs were divided into five groups based on the phylogenetic relationship, numbers of B-boxes contained and whether there was with an additional CCT domain...
October 24, 2017: Molecular Genetics and Genomics: MGG
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