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"abscisic acid"

Emel Timucin, Osman Ugur Sezerman
Magnesium deficiency increases susceptibility of plants towards heat stress. The correlation between magnesium levels and stress response has been studied at the physiological level, albeit the molecular explanation to this relationship remains elusive. Among diverse pathways implicated in the heat stress, the abscisic acid (ABA) signal modulates the heat stress response by magnesium dependent phosphatases (PP2Cs). Exclusively, sequestration of PP2Cs by ABA receptors (PYLs) in the heterodimer form activates the stress response through ABA responsive transcription factors...
February 13, 2018: Journal of Chemical Information and Modeling
Fernanda C C Marcos, Neidiquele M Silveira, João B Mokochinski, Alexandra C H F Sawaya, Paulo E R Marchiori, Eduardo C Machado, Gustavo M Souza, Marcos G A Landell, Rafael V Ribeiro
Under field conditions, plants are exposed to cycles of dehydration and rehydration during their lifespan. In this study, we hypothesized that sugarcane plants previously exposed to cycles of water deficits will perform better than plants that have never faced water deficits when both are subjected to low water availability. Sugarcane plants were grown in a nutrient solution and exposed to one (1WD), two (2WD) or three (3WD) water deficit cycles. As the reference, plants were grown in a nutrient solution without adding polyethylene glycol...
February 5, 2018: Journal of Plant Physiology
Yao Cheng, Xiuxiu Zhang, Tianyang Sun, Qiuying Tian, Wen-Hao Zhang
Seed germination is sensitive to salt stress, and abscisic acid (ABA) and Ca2+ are involved in the regulation of seed germination under salt stress. Ca2+ influx mediated by glutamate receptors (GLRs) plays important roles in many physiological processes in plants. Here, we investigated the correlation of GLRs, Ca2+ and ABA during seed germination in response to salt stress by using Arabidopsis thaliana wild-type and T-DNA insertion knockout mutants of glutamate receptors homolog3.4. We demonstrated that atglr3...
February 7, 2018: Plant & Cell Physiology
Iva Pavlović, Aleš Pěnčík, Ondřej Novák, Valerija Vujčić, Sandra Radić Brkanac, Hrvoje Lepeduš, Miroslav Strnad, Branka Salopek-Sondi
Salinity is one of major abiotic stresses affecting Brassica crop production. Here we present investigations into the physiological, biochemical, and hormonal components of the short-term salinity stress response in Chinese cabbage seedlings, with particular emphasis on the biosynthesis and metabolism of auxin indole-3-acetic acid (IAA). Upon salinity treatments (50-200 mM NaCl) IAA level was elevated in a dose dependent manner reaching 1.6-fold increase at the most severe salt treatment in comparison to the control...
February 2, 2018: Plant Physiology and Biochemistry: PPB
Jian-Jun Tao, Wei Wei, Wen-Jia Pan, Long Lu, Qing-Tian Li, Jin-Biao Ma, Wan-Ke Zhang, Biao Ma, Shou-Yi Chen, Jin-Song Zhang
Alfin-like (AL) is a small plant-specific gene family with prominent roles in root growth and abiotic stress response. Here, we aimed to identify novel stress tolerance AL genes from the stress-tolerant species Atriplex hortensis. Totally, we isolated four AhAL genes, all encoding nuclear-localized proteins with cis-element-binding and transrepression activities. Constitutive expression of AhAL1 in Arabidopsis facilitated plants to survive under saline condition, while expressing anyone of the other three AhAL genes led to salt-hypersensitive response, indicating functional divergence of AhAL family...
February 9, 2018: Scientific Reports
Yongqing Wan, Mingzhu Mao, Dongli Wan, Qi Yang, Feiyun Yang, Mandlaa, Guojing Li, Ruigang Wang
BACKGROUND: WRKY transcription factors, one of the largest families of transcriptional regulators in plants, play important roles in plant development and various stress responses. The WRKYs of Caragana intermedia are still not well characterized, although many WRKYs have been identified in various plant species. RESULTS: We identified 53 CiWRKY genes from C. intermedia transcriptome data, 28 of which exhibited complete open reading frames (ORFs). These CiWRKYs were divided into three groups via phylogenetic analysis according to their WRKY domains and zinc finger motifs...
February 9, 2018: BMC Plant Biology
Lanfen Wang, Jifeng Zhu, Xiaoming Li, Shumin Wang, Jing Wu
Mung bean and adzuki bean are warm-season legumes widely cultivated in China. However, bean production in major producing regions is limited by biotic and abiotic stress, such as drought and salt stress. Basic leucine zipper (bZIP) genes play key roles in responses to various biotic and abiotic stresses. However, only several bZIP genes involved in drought and salt stress in legumes, especially Vigna radiata and Vigna angularis, have been identified. In this study, we identified 54 and 50 bZIP proteins from whole-genome sequences of V...
February 6, 2018: Gene
Lulu Liu, Zhigang Wang, Jianlong Liu, Fengxia Liu, Rui Zhai, Chunqin Zhu, Huibin Wang, Fengwang Ma, Lingfei Xu
Phytohormones play crucial roles in fruit set regulation and development. Here, gibberellins (GA4+7), but not GA3, induced pear parthenocarpy. To systematically investigate the changes upon GA4+7 induced pear parthenocarpy, dynamic changes in histology, hormone and transcript levels were observed and identified in unpollinated, pollinated and GA4+7-treated ovaries. Mesocarp cells continued developing in both GA4+7-treated and pollinated ovaries. In unpollinated ovaries, mesocarp cells stopped developing 14 days after anthesis...
2018: Horticulture Research
Elena Cichero, Chiara Fresia, Lucrezia Guida, Valeria Booz, Enrico Millo, Claudia Scotti, Luisa Iamele, Hugo de Jonge, Denise Galante, Antonio De Flora, Laura Sturla, Tiziana Vigliarolo, Elena Zocchi, Paola Fossa
Lanthionine synthetase component C-like protein 2 (LANCL2) has been identified as the mammalian receptor mediating the functional effects of the universal stress hormone abscisic acid (ABA) in mammals. ABA stimulates insulin independent glucose uptake in myocytes and adipocytes via LANCL2 binding in vitro, improves glucose tolerance in vivo and induces brown fat activity in vitro and in vivo. The emerging role of the ABA/LANCL2 system in glucose and lipid metabolism makes it an attractive target for pharmacological interventions in diabetes mellitus and the metabolic syndrome...
February 5, 2018: International Journal of Biochemistry & Cell Biology
Dian-Jun Xiang, Li-Li Man, Chun-Lan Zhang, Peng-Liu, Zhi-Gang Li, Gen-Chang Zheng
Late embryogenesis abundant (LEA) proteins are closely related to abiotic stress tolerance of plants. In the present study, we identified a novel Em-like gene from lettuce, termed LsEm1, which could be classified into group 1 LEA proteins, and shared high homology with Cynara cardunculus Em protein. The LsEm1 protein contained three different 20-mer conserved elements (C-element, N-element, and M-element) in the C-termini, N-termini, and middle-region, respectively. The LsEm1 mRNAs were accumulated in all examined tissues during the flowering and mature stages, with a little accumulation in the roots and leaves during the seedling stage...
February 7, 2018: Protoplasma
Xiaojuan Ran, Jian Liu, Meifang Qi, Yuejun Wang, Jingfei Cheng, Yijing Zhang
Phytohormones regulate diverse aspects of plant growth and environmental responses. Recent high-throughput technologies have promoted a more comprehensive profiling of genes regulated by different hormones. However, these omics data generally result in large gene lists that make it challenging to interpret the data and extract insights into biological significance. With the rapid accumulation of theses large-scale experiments, especially the transcriptomic data available in public databases, a means of using this information to explore the transcriptional networks is needed...
2018: Frontiers in Plant Science
Wenjun Ou, Xiang Mao, Chao Huang, Weiwei Tie, Yan Yan, Zehong Ding, Chunlai Wu, Zhiqiang Xia, Wenquan Wang, Shiyi Zhou, Kaimian Li, Wei Hu
KT/HAK/KUP (KUP) family is responsible for potassium ion (K+) transport, which plays a vital role in the response of plants to abiotic stress by maintaining osmotic balance. However, our understanding of the functions of the KUP family in the drought-resistant crop cassava (Manihot esculenta Crantz) is limited. In the present study, 21 cassava KUP genes (MeKUPs) were identified and classified into four clusters based on phylogenetic relationships, conserved motifs, and gene structure analyses. Transcriptome analysis revealed the expression diversity of cassava KUPs in various tissues of three genotypes...
2018: Frontiers in Physiology
Li Wang, Chen Zhu, Lin Jin, Aihua Xiao, Jie Duan, Luyi Ma
Kalanchoe (K.) daigremontiana is important for studying asexual reproduction under different environmental conditions. Here, we describe a novel KdNOVEL41 (KdN41) gene that may confer drought resistance and could thereby affect K. daigremontiana development. The detected subcellular localization of a KdN41/Yellow Fluorescent Protein (YFP) fusion protein was in the nucleus and cell membrane. Drought, salt, and heat stress treatment in tobacco plants containing the KdN41 gene promoter driving β-glucuronidase (GUS) gene transcription revealed that only drought stress triggered strong GUS staining in the vascular tissues...
February 7, 2018: Scientific Reports
Jinfang Wang, Lei Zhang, Yunyun Cao, Chuandong Qi, Shuangtao Li, Lun Liu, Gongle Wang, Aijun Mao, Shuxin Ren, Yang-Dong Guo
The NAC transcription factors play vital roles in responding to drought stress in plants; however, the molecular mechanisms remain largely unknown in cucumber. Suppression of CsATAF1 via RNA interference (RNAi) weakened drought stress tolerance in cucumber due to higher water loss rate in leaves, higher level of hydrogen peroxide (H2O2) and superoxide (O2-) radicals, increased malondiadehyde (MDA) content, lower Fv/Fm ratios and lower antioxidant enzyme activity. The analysis of root length and stomatal apertures showed that CsATAF1- RNAi cucumber plants were less responsive to abscisic acid (ABA)...
February 5, 2018: Plant & Cell Physiology
M Caviglia, L M Mazorra Morales, A Concellón, G E Gergoff Grozeff, M Wilson, C H Foyer, C G Bartoli
Ascorbic acid (AA) is a major redox buffer in plant cells. The role of ethylene in the redox signaling pathways that influence photosynthesis and growth was explored in two independent AA deficient Arabidopsis thaliana mutants (vtc2-1 and vtc2-4). Both mutants, which are defective in the AA biosynthesis gene GDP-L-galactose phosphorylase, produce higher amounts of ethylene than wt plants. In contrast to the wt, the inhibition of ethylene signaling increased leaf conductance, photosynthesis and dry weight in both vtc2 mutant lines...
February 1, 2018: Free Radical Biology & Medicine
Cassandra L Olds, Elizabeth K K Glennon, Shirley Luckhart
Few biological molecules have as far reaching and dynamic effects as abscisic acid (ABA). In this review, we draw together the often segregated fields of plant, animal, and human biology to highlight ABA biosynthesis, signaling and physiological effects with examples of host-pathogen interactions to emphasize the cross-kingdom biology of this ancient signaling molecule.
January 31, 2018: Microbes and Infection
Jian Chen, Xuehui Chen, Qingfeng Zhang, Yidan Zhang, Xiangli Ou, Lizhe An, Huyuan Feng, Zhiguang Zhao
Plant pectin methyl-esterase (PME) and PME inhibitor (PMEI) belong to large gene families whose members are proposed to be widely involved in growth, development, and stress responses; however, the biological functions of most PMEs and PMEIs have not been characterized. In this study, we studied the roles of CbPMEI1, a cold-induced pectin methyl-esterase inhibitor (PMEI) gene from Chorispora bungeana, under freezing and salt stress. The putative CbPMEI1 peptide shares highest similarity (83%) with AT5G62360 (PMEI13) of Arabidopsis...
January 30, 2018: Journal of Plant Physiology
Fang He, Hou-Ling Wang, Hui-Guang Li, Yanyan Su, Shuang Li, Yanli Yang, Cong-Hua Feng, Weilun Yin, Xinli Xia
Drought, a primary abiotic stress, seriously affects plant growth and productivity. Stomata play a vital role in regulating gas exchange and drought adaptation. However, limited knowledge exists of the molecular mechanisms underlying stomatal movement in trees. Here, PeCHYR1, a ubiquitin E3 ligase, was isolated from Populus euphratica, a model of stress adaptation in forest trees. PeCHYR1 was preferentially expressed in young leaves and was significantly induced by ABA (abscisic acid) and dehydration treatments...
February 6, 2018: Plant Biotechnology Journal
Monavereh Soti, Mehdi Abbasnejad, Razieh Kooshki, Saeed Esmaeili-Mahani
OBJECTIVES: Natural products have a potential role on food intake in mammals. It has been reported that phytohormone abscisic acid (ABA) has a regulatory role on metabolic processes. Here, the effects of ABA on feeding behavior and brain oxidative stress were investigated in male Wistar rats. METHODS: ABA was injected intracerebroventricularly. Experimental groups were included (n = 9): control (received no injection), ABA vehicle (received normal saline), and ABA-treated groups were injected with different doses of ABA (2...
February 6, 2018: Nutritional Neuroscience
Pan-Pan Lu, Tai-Fei Yu, Wei-Jun Zheng, Ming Chen, Yong-Bin Zhou, Jun Chen, You-Zhi Ma, Ya-Jun Xi, Zhao-Shi Xu
Bax inhibitor-1 (BI-1) is an endoplasmic reticulum (ER)-resident cell death suppressor evolutionarily conserved in eukaryotes. The ability of BI-1 to inhibit the biotic and abiotic stresses have been well-studied in Arabidopsis, while the functions of wheat BI-1 are largely unknown. In this study, the wheat BI-1 gene TaBI-1.1 was isolated by an RNA-seq analysis of Fusarium graminearum (Fg)-treated wheat. TaBI-1.1 expression was induced by a salicylic acid (SA) treatment and down-regulated by an abscisic acid (ABA) treatment...
2018: Frontiers in Plant Science
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