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abiotic stress

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https://www.readbyqxmd.com/read/29232718/an-arabidopsis-nucleoporin-nup85-modulates-plant-responses-to-aba-and-salt-stress
#1
Yingfang Zhu, Bangshing Wang, Kai Tang, Chuan-Chih Hsu, Shaojun Xie, Hai Du, Yuting Yang, Weiguo Andy Tao, Jian-Kang Zhu
Several nucleoporins in the nuclear pore complex (NPC) have been reported to be involved in abiotic stress responses in plants. However, the molecular mechanism of how NPC regulates abiotic stress responses, especially the expression of stress responsive genes remains poorly understood. From a forward genetics screen using an abiotic stress-responsive luciferase reporter (RD29A-LUC) in the sickle-1 (sic-1) mutant background, we identified a suppressor caused by a mutation in NUCLEOPORIN 85 (NUP85), which exhibited reduced expression of RD29A-LUC in response to ABA and salt stress...
December 12, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29231846/the-discrepant-and-similar-responses-of-genome-wide-transcriptional-profiles-between-drought-and-cold-stresses-in-cassava
#2
Changying Zeng, Zehong Ding, Fang Zhou, Yufei Zhou, Ruiju Yang, Zi Yang, Wenquan Wang, Ming Peng
Background: Cassava, an important tropical crop, has remarkable drought tolerance, but is very sensitive to cold. The growth, development, and root productivity of cassava are all adversely affected under cold and drought. Methods: To profile the transcriptional response to cold and drought stresses, cassava seedlings were respectively subjected to 0, 6, 24, and 48 h of cold stress and 0, 4, 6, and 10 days of drought stress. Their folded leaves, fully extended leaves, and roots were respectively investigated using RNA-seq...
December 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29230823/decreasing-fructose-1-6-bisphosphate-aldolase-activity-reduces-plant-growth-and-tolerance-to-chilling-stress-in-tomato-seedlings
#3
Bingbing Cai, Qiang Li, Fengjiao Liu, Huangai Bi, Xizhen Ai
In northern China, low temperatures are the most common abiotic stresses for tomato plants cultivated in solar-greenhouse in winter. We recently found that the expression and enzyme activity of fructose 1,6-bisphosphate aldolases in tomato (FBAs), which are important enzymes in the Calvin-Benson cycle (CBC), were significantly altered in tomato seedlings subjected to heat/cold stresses. In order to study the role of FBA in photosynthesis and in regulating cold stress responses of tomato seedlings (Solanum lycopersicum), we transformed a tomato inbred line (FF) with RNA interference (RNAi) vector containing SlFBA7 reverse tandem repeat sequence...
December 12, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29230609/comparative-assessment-of-chloroplast-transcriptional-responses-highlights-conserved-and-unique-patterns-across-triticeae-members-under-salt-stress
#4
Saeid Mirzaei, Mehdi Mansouri, Ghasem Mohammadi-Nejad, Gaurav Sablok
Chloroplast functional genomics, in particular understanding the chloroplast transcriptional response is of immense importance mainly due to its role in oxygenic photosynthesis. As a photosynthetic unit, its efficiency and transcriptional activity is directly regulated by reactive oxygen species during abiotic and biotic stress and subsequently affects carbon assimilation, and plant biomass. In crops, understanding photosynthesis is crucial for crop domestication by identifying the traits that could be exploited for crop improvement...
December 11, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/29229911/comparative-genome-analysis-of-the-vineyard-weed-endophyte-pseudomonas-viridiflava-cdrtc14-showing-selective-herbicidal-activity
#5
Abdul Samad, Livio Antonielli, Angela Sessitsch, Stéphane Compant, Friederike Trognitz
Microbes produce a variety of secondary metabolites to be explored for herbicidal activities. We investigated an endophyte Pseudomonas viridiflava CDRTc14, which impacted growth of its host Lepidium draba L., to better understand the possible genetic determinants for herbicidal and host-interaction traits. Inoculation tests with a variety of target plants revealed that CDRTc14 shows plant-specific effects ranging from beneficial to negative. Its herbicidal effect appeared to be dose-dependent and resembled phenotypically the germination arrest factor of Pseudomonas fluorescens WH6...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29229750/profiling-of-accessible-chromatin-regions-across-multiple-plant-species-and-cell-types-reveals-common-gene-regulatory-principles-and-new-control-modules
#6
Kelsey A Maher, Marko Bajic, Kaisa Kajala, Mauricio Reynoso, Germain Pauluzzi, Donnelly West, Kristina Zumstein, Margaret Woodhouse, Kerry L Bubb, Michael W Dorrity, Christine Queitsch, Julia Bailey-Serres, Neelima Sinha, Siobhan M Brady, Roger Deal
The transcriptional regulatory structure of plant genomes remains poorly defined relative to animals. It is unclear how many cis-regulatory elements exist, where these elements lie relative to promoters, and how these features are conserved across plant species. We employed the Assay for Transposase-Accessible Chromatin (ATAC-seq) in four plant species (Arabidopsis thaliana, Medicago truncatula, Solanum lycopersicum, and Oryza sativa) to delineate open chromatin regions and transcription factor (TF) binding sites across each genome...
December 11, 2017: Plant Cell
https://www.readbyqxmd.com/read/29228032/genome-wide-identification-of-wrky-genes-and-their-expression-profiles-under-different-abiotic-stresses-in-elaeis-guineensis
#7
Yong Xiao, Lixia Zhou, Xintao Lei, Hongxing Cao, Yong Wang, Yajing Dou, Wenqi Tang, Wei Xia
African oil palm (Elaeis guineensis) is an important oil crop grown in tropical region and sensitive to low temperature along with high tolerance to salt and drought stresses. Since the WRKY transcription factor family plays central roles in the regulation of plant stress tolerance, 95 genes belonging to the WRKY family were identified and characterized in oil palm genome. Gene structure analysis showed that EgWRKY genes have considerable variation in intron number (0 to 12) and gene length (477bp to 89,167 bp)...
2017: PloS One
https://www.readbyqxmd.com/read/29227949/a-cbl-interacting-protein-kinase-tacipk27-confers-drought-tolerance-and-exogenous-aba-sensitivity-in-transgenic-arabidopsis
#8
Yan Wang, Tingting Li, Shanita Judith John, Mingjie Chen, Junli Chang, Guangxiao Yang, Guangyuan He
Drought is one of the major environmental stresses to plants. The calcium sensor, calcineurin B-like (CBL) proteins, and their interacting protein kinases (CIPK) play important roles in responding to abiotic stresses. In this study, we functionally characterized a CIPK gene from Triticum aestivum designated TaCIPK27. The transcriptional levels of TaCIPK27 were increased both in roots and leaves after treatment with polyethylene glycol 8000, abscisic acid and H2O2. Besides, TaCIPK27 interacted with AtCBL1, AtCBL3, AtCBL4, AtCBL5 and AtCBL9 in yeast two-hybrid assays...
December 1, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29225611/overexpression-of-tawrky146-increases-drought-tolerance-through-inducing-stomatal-closure-in-arabidopsis-thaliana
#9
Jianhui Ma, Xiaolong Gao, Qing Liu, Yun Shao, Daijing Zhang, Lina Jiang, Chunxi Li
As a superfamily of transcription factors, the tryptophan-arginine-lysine-tyrosine (WRKY) transcription factors have been found to be essential for abiotic and biotic stress responses in plants. Currently, only 76 WRKY transcription factors in wheat could be identified in the NCBI database, among which only a few have been functionally analyzed. Herein, a total of 188 WRKY transcription factors were identified from the wheat genome database, which included 123 full-length coding sequences, and all of them were used for detailed evolution studies...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29225607/alternative-splicing-of-cipk3-results-in-distinct-target-selection-to-propagate-aba-signaling-in-arabidopsis
#10
Sibaji K Sanyal, Poonam Kanwar, Harsha Samtani, Kanwaljeet Kaur, Saroj K Jha, Girdhar K Pandey
Calcium (Ca2+) signaling is pivotal in transmission of information in the cell. Various Ca2+ sensing molecules work to sense and relay the encrypted messages to the intended targets in the cell to maintain this signal transduction. CBL-interacting protein kinases (CIPKs) are crucial components of Ca2+ signal transduction during various abiotic stresses. Although there are intron rich CIPKs in the plant genome but very little has been reported about their alternative splicing. Moreover the physiological significance of this event in the Ca2+ signaling is still elusive...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29224117/heated-communities-large-inter-and-intraspecific-variation-in-heat-tolerance-across-trophic-levels-of-a-soil-arthropod-community
#11
Oscar Franken, Milou Huizinga, Jacintha Ellers, Matty P Berg
Temperature extremes are predicted to increase in frequency, intensity and duration under global warming and are believed to significantly affect community composition and functioning. However, the effect of extreme climatic events on communities remains difficult to predict, especially because species can show dissimilar responses to abiotic changes, which may affect the outcome of species interactions. To anticipate community responses we need knowledge on within and among species variation in stress tolerance...
December 9, 2017: Oecologia
https://www.readbyqxmd.com/read/29223850/genome-wide-analysis-of-carotenoid-cleavage-oxygenase-genes-and-their-responses-to-various-phytohormones-and-abiotic-stresses-in-apple-malus-domestica
#12
Hongfei Chen, Xiya Zuo, Hongxia Shao, Sheng Fan, Juanjuan Ma, Dong Zhang, Caiping Zhao, Xiangyan Yan, Xiaojie Liu, Mingyu Han
Carotenoid cleavage oxygenases (CCOs) are able to cleave carotenoids to produce apocarotenoids and their derivatives, which are important for plant growth and development. In this study, 21 apple CCO genes were identified and divided into six groups based on their phylogenetic relationships. We further characterized the apple CCO genes in terms of chromosomal distribution, structure and the presence of cis-elements in the promoter. We also predicted the cellular localization of the encoded proteins. An analysis of the synteny within the apple genome revealed that tandem, segmental, and whole-genome duplication events likely contributed to the expansion of the apple carotenoid oxygenase gene family...
December 5, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29223339/microrna396a-5p-and-3p-induce-tomato-disease-susceptibility-by-suppressing-target-genes-and-upregulating-salicylic-acid
#13
Lei Chen, Jun Meng, Junmiao Zhai, Pinsan Xu, Yushi Luan
Plants have evolved a variety of mechanisms to perceive and resist the assault of pathogens. The biotrophs, necrotrophs and hemibiotrophs are types of plant pathogens that activate diverse salicylic acid (SA) and jasmonic acid (JA) signaling pathways. In this study we showed that the expressions of miR396a-5p and -3p in Solanum lycopersicum (S. lycopersicum) were both down-regulated after infection by hemibiotroph Phytophthora infestans (P. infestans) and necrotroph Botrytis cinerea (B. cinerea) infection. Overexpression of miR396a-5p and -3p in transgenic tomato enhanced the susceptibility of S...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223337/an-erf-transcription-factor-from-tamarix-hispida-thcrf1-can-adjust-osmotic-potential-and-reactive-oxygen-species-scavenging-capability-to-improve-salt-tolerance
#14
Liping Qin, Liuqiang Wang, Yong Guo, Yan Li, Halik Ümüt, Yucheng Wang
Ethylene-Responsive Factors (ERFs) are plant-specific transcription factors (TFs) involved in multiple biological processes, especially in abiotic stress tolerance. However, the ERFs from woody halophytes that are involved in salt stress have been little studied. In the present investigation, we characterized a subfamily member of ERF TFs from Tamarix hispida, ThCRF1, which responds to salt stress. ThCRF1 is a nuclear protein that binds to the motifs including TTG, DRE and GCC-box. Transient transformation was performed to generate T...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223333/constitutive-expression-of-brassica-juncea-annexin-annbj2-confers-salt-tolerance-and-glucose-and-aba-insensitivity-in-mustard-transgenic-plants
#15
Israr Ahmed, Deepanker Yadav, Pawan Shukla, T V Vineeth, P C Sharma, P B Kirti
Annexins belong to a plasma membrane binding (in a calcium dependent manner), multi-gene family of proteins, which play ameliorating roles in biotic and abiotic stresses. The expression of annexin AnnBj2 of Indian mustard is tissue specific with higher expression in roots and under treatments with sodium chloride and abscisic acid (ABA) at seedling stage. The effect of constitutive expression of AnnBj2 in mustard was analyzed in detail. AnnBj2 OE (over expression) plants exhibited insensitivity to ABA, glucose and sodium chloride...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223332/a-wheat-myb-transcriptional-repressor-tamyb1d-regulates-phenylpropanoid-metabolism-and-enhances-tolerance-to-drought-and-oxidative-stresses-in-transgenic-tobacco-plants
#16
Qiuhui Wei, Fan Zhang, Fusheng Sun, Qingchen Luo, Ruibin Wang, Rui Hu, Mingjie Chen, Junli Chang, Guangxiao Yang, Guangyuan He
MYB transcription factors are involved in the regulation of plant development and response to biotic and abiotic stress. In this study, TaMyb1D, a novel subgroup 4 gene of the R2R3-MYB subfamily, was cloned from wheat (Triticum aestivum L.). TaMyb1D was localized in the nucleus and functioned as a transcriptional repressor. The overexpression of TaMyb1D in tobacco (Nicotiana tabacum) plants repressed the expression of genes related to phenylpropanoid metabolism and down-regulated the accumulation of lignin in stems and flavonoids in leaves...
December 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/29223068/comprehensive-analysis-and-transcript-profiling-of-arabidopsis-thaliana-and-oryza-sativa-catalase-gene-family-suggests-their-specific-roles-in-development-and-stress-responses
#17
Nazmir Binta Alam, Ajit Ghosh
Stress induces the generation of Reactive Oxygen Species (ROS) that ultimately hampers the growth, development, and productivity of the plant. As an antioxidant enzyme, catalase converts hydrogen peroxide to water and keeps ROS level down to protect cells from stress-induced apoptosis. Here, a genome-wide analysis of catalase gene family has been performed in two model plants- Arabidopsis thaliana and Oryza sativa. Both Arabidopsis and rice has a small family of three and four genes, respectively; that code for seven proteins each...
December 1, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29223066/overexpression-of-the-maize-e3-ubiquitin-ligase-gene-zmairp4-enhances-drought-stress-tolerance-in-arabidopsis
#18
Liang Yang, Lintao Wu, Wei Chang, Zhi Li, Mingjun Miao, Yuejian Li, Junpin Yang, Zhibin Liu, Jun Tan
Ubiquitin-mediated protein degradation plays a crucial role in enabling plants to effectively and efficiently cope with environmental stresses. The E3 ligases have emerged as a central component of the ubiquitination pathway and modulate plant response to abiotic stresses. However, few such studies have been reported in maize. In this study, a C3HC4-type RING finger E3 ligase in maize, ZmAIRP4 (Zea mays Abscisic acid [ABA]-Insensitive RING Protein 4), which is an ortholog of AtAIRP4, was isolated by reverse transcription polymerase chain reaction with specific primers, and its functions in tolerance to drought stress were described...
December 5, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29222952/accumulation-of-the-coumarin-scopolin-under-abiotic-stress-conditions-is-mediated-by-the-arabidopsis-thaliana-tho-trex-complex
#19
Stefanie Döll, Markus Kuhlmann, Twan Rutten, Michael Florian Mette, Sarah Scharfenberg, Antonios Petridis, Dorothee-Carina Berreth, Hans-Peter Mock
Secondary metabolites are involved in plant stress response. Among these are scopolin and its active form scopoletin, which are coumarin-derivatives associated with reactive oxygen species scavenging and pathogen defence. Here we show that scopolin accumulation can be induced in the root by osmotic stress and in the leaf by low temperature stress in Arabidopsis thaliana. A genetic screen for altered scopolin levels in A. thaliana revealed a mutant compromised in scopolin accumulation in response to stress; the lesion was present in a homologue of THO1 coding for a subunit of the THO/TREX complex...
December 9, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29220745/identification-and-characterization-of-six-peroxiredoxin-transcripts-from-mud-crab-scylla-paramamosain-the-first-evidence-of-peroxiredoxin-gene-family-in-crustacean-and-their-expression-profiles-under-biotic-and-abiotic-stresses
#20
Dan-Dan Tu, Yi-Lian Zhou, Wen-Bin Gu, Qi-Hui Zhu, Bin-Peng Xu, Zhong-Kai Zhou, Ze-Peng Liu, Cong Wang, Yu-Yin Chen, Miao-An Shu
The peroxiredoxins (Prxs) define a novel and evolutionarily conserved superfamily of peroxidases able to protect cells from oxidative damage by catalyzing the reduction of a wide range of cellular peroxides. Prxs have been identified in prokaryotes as well as in eukaryotes, however, the composition and number of Prxs family members vary in different species. In this study, six Prxs were firstly identified from the mud crab Scylla paramamosain by RT-PCR and RACE methods. Six SpPrxs can be subdivided into three classes: (a) three typical 2-Cys enzymes denominated as Prx1/2, 3, 4, (b) two atypical 2-Cys enzymes known as Prx5-1 and Prx5-2, and (c) a 1-Cys isoform named Prx6...
December 4, 2017: Molecular Immunology
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