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https://www.readbyqxmd.com/read/28542212/proteome-dynamics-of-cold-acclimating-rhododendron-species-contrasting-in-their-freezing-tolerance-and-thermonasty-behavior
#1
Jose V Die, Rajeev Arora, Lisa J Rowland
To gain a better understanding of cold acclimation in rhododendron and in woody perennials in general, we used the 2D-DIGE technique to analyze the rhododendron proteome during the seasonal development of freezing tolerance. We selected two species varying in their cold acclimation ability as well as their thermonasty response (folding of leaves in response to low temperature). Proteins were extracted from leaves of non-acclimated (NA) and cold acclimated (CA) plants of the hardier thermonastic species, R. catawbiense (Cata...
2017: PloS One
https://www.readbyqxmd.com/read/28536596/sorghum-landrace-collections-from-cooler-regions-of-the-world-exhibit-magnificent-genetic-differentiation-and-early-season-cold-tolerance
#2
Frank Maulana, Dilooshi Weerasooriya, Tesfaye Tesso
Cold temperature is an important abiotic stress affecting sorghum production in temperate regions. It reduces seed germination, seedling emergence and seedling vigor thus limiting the production of the crop both temporally and spatially. The objectives of this study were (1) to assess early season cold temperature stress response of sorghum germplasm from cooler environments and identify sources of tolerance for use in breeding programs, (2) to determine population structure and marker-trait association among these germplasms for eventual development of marker tools for improving cold tolerance...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28536593/molecular-characterization-and-expression-profiling-of-brachypodium-distachyon-l-cystatin-genes-reveal-high-evolutionary-conservation-and-functional-divergence-in-response-to-abiotic-stress
#3
Saminathan Subburaj, Dong Zhu, Xiaohui Li, Yingkao Hu, Yueming Yan
Cystatin is a class of proteins mainly involved in cysteine protease inhibition and plant growth and development, as well as tolerance under various abiotic stresses. In this study, we performed the first comprehensive analysis of the molecular characterization and expression profiling in response to various abiotic stresses of the cystatin gene family in Brachypodium distachyon, a novel model plant for Triticum species with huge genomes. Comprehensive searches of the Brachypodium genome database identified 25 B...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28533787/genome-wide-analysis-of-gene-expression-provides-new-insights-into-cold-responses-in-thellungiella-salsuginea
#4
Jiangshan Wang, Quan Zhang, Feng Cui, Lei Hou, Shuzhen Zhao, Han Xia, Jingjing Qiu, Tingting Li, Ye Zhang, Xingjun Wang, Chuanzhi Zhao
Low temperature is one of the major environmental stresses that affects plant growth and development, and leads to decrease in crop yield and quality. Thellungiella salsuginea (salt cress) exhibits high tolerance to chilling, is an appropriate model to investigate the molecular mechanisms of cold tolerance. Here, we compared transcription changes in the roots and leaves of T. salsuginea under cold stress using RNA-seq. We identified 2,782 and 1,430 differentially expressed genes (DEGs) in leaves and roots upon cold treatment, respectively...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28527975/the-reaumuria-trigyna-transcription-factor-rtwrky1-confers-tolerance-to-salt-stress-in-transgenic-arabidopsis
#5
Chao Du, Pingping Zhao, Huirong Zhang, Ningning Li, Linlin Zheng, Yingchun Wang
Reaumuria trigyna (R. trigyna) is an endangered small shrub endemic to the Eastern Alxa-Western Ordos area in Inner Mongolia, China. Based on R. trigyna transcriptome data, the Group I WRKY transcription factor gene RtWRKY1 was cloned from R. trigyna. The full-length RtWRKY1 gene was 2100bp, including a 1261-bp open reading frame (ORF) encoding 573 amino acids. RtWRKY1 was mainly expressed in the stem and was induced by salt, cold stress, and ABA treatment. Overexpression of RtWRKY1 in Arabidopsis significantly enhanced the chlorophyll content, root length, and fresh weight of the transgenic lines under salt stress...
May 4, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28523013/genome-analysis-of-conserved-dehydrin-motifs-in-vascular-plants
#6
Ahmad A Malik, Michael Veltri, Kelly F Boddington, Karamjeet K Singh, Steffen P Graether
Dehydrins, a large family of abiotic stress proteins, are defined by the presence of a mostly conserved motif known as the K-segment, and may also contain two other conserved motifs known as the Y-segment and S-segment. Using the dehydrin literature, we developed a sequence motif definition of the K-segment, which we used to create a large dataset of dehydrin sequences by searching the Pfam00257 dehydrin dataset and the Phytozome 10 sequences of vascular plants. A comprehensive analysis of these sequences reveals that lysine residues are highly conserved in the K-segment, while the amino acid type is often conserved at other positions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28523010/beneficial-soil-bacterium-pseudomonas-frederiksbergensis-os261-augments-salt-tolerance-and-promotes-red-pepper-plant-growth
#7
Poulami Chatterjee, Sandipan Samaddar, Rangasamy Anandham, Yeongyeong Kang, Kiyoon Kim, Gopal Selvakumar, Tongmin Sa
Soil salinity, being a part of natural ecosystems, is an increasing problem in agricultural soils throughout the world. Pseudomonas frederiksbergensis OS261 has already been proved to be an effective bio-inoculant for enhancing cold stress tolerance in plants, however, its effect on salt stress tolerance is unknown. The main aim of the present study was to elucidate P. frederiksbergensis OS261 mediated salt stress tolerance in red pepper. The plants were exposed to a salt stress using NaCl at the concentrations of 50, 100, and 150 mM after 12 days of transplantation, while plant growth and enzyme activity were estimated 50 days after sowing...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28523004/selection-of-suitable-reference-genes-for-quantitative-real-time-pcr-in-sapium-sebiferum
#8
Xue Chen, Yingji Mao, Shengwei Huang, Jun Ni, Weili Lu, Jinyan Hou, Yuting Wang, Weiwei Zhao, Minghao Li, Qiaojian Wang, Lifang Wu
Chinese tallow (Sapium sebiferum L.) is a promising landscape and bioenergy plant. Measuring gene expression by quantitative real-time polymerase chain reaction (qRT-PCR) can provide valuable information on gene function. Stably expressed reference genes for normalization are a prerequisite for ensuring the accuracy of the target gene expression level among different samples. However, the reference genes in Chinese tallow have not been systematically validated. In this study, 12 candidate reference genes (18S, GAPDH, UBQ, RPS15, SAND, TIP41, 60S, ACT7, PDF2, APT, TBP, and TUB) were investigated with qRT-PCR in 18 samples, including those from different tissues, from plants treated with sucrose and cold stresses...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28510716/phosphorylation-of-the-transcriptional-repressor-myb15-by-mitogen-activated-protein-kinase-6-is-required-for-freezing-tolerance-in-arabidopsis
#9
Sun Ho Kim, Ho Soo Kim, Sunghwa Bahk, Jonguk An, Yeji Yoo, Jae-Yean Kim, Woo Sik Chung
The expression of CBF (C-repeat-binding factor) genes is required for freezing tolerance in Arabidopsis thaliana. CBFs are positively regulated by INDUCER OF CBF EXPRESSION1 (ICE1) and negatively regulated by MYB15. These transcription factors directly interact with specific elements in the CBF promoters. Mitogen-activated protein kinase (MAPK/MPK) cascades function upstream to regulate CBFs. However, the mechanism by which MPKs control CBF expression during cold stress signaling remains unknown. This study showed that the activity of MYB15, a transcriptional repressor of cold signaling, is regulated by MPK6-mediated phosphorylation...
May 16, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28510204/microarray-meta-analysis-to-explore-abiotic-stress-specific-gene-expression-patterns-in-arabidopsis
#10
Po-Chih Shen, Ai-Ling Hour, Li-Yu Daisy Liu
BACKGROUND: Abiotic stresses are the major limiting factors that affect plant growth, development, yield and final quality. Deciphering the underlying mechanisms of plants' adaptations to stresses using few datasets might overlook the different aspects of stress tolerance in plants, which might be simultaneously and consequently operated in the system. Fortunately, the accumulated microarray expression data offer an opportunity to infer abiotic stress-specific gene expression patterns through meta-analysis...
December 2017: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28505092/molecular-characterization-and-expression-profiling-of-tomato-grf-transcription-factor-family-genes-in-response-to-abiotic-stresses-and-phytohormones
#11
Khadiza Khatun, Arif Hasan Khan Robin, Jong-In Park, Ujjal Kumar Nath, Chang Kil Kim, Ki-Byung Lim, Ill Sup Nou, Mi-Young Chung
Growth regulating factors (GRFs) are plant-specific transcription factors that are involved in diverse biological and physiological processes, such as growth, development and stress and hormone responses. However, the roles of GRFs in vegetative and reproductive growth, development and stress responses in tomato (Solanum lycopersicum) have not been extensively explored. In this study, we characterized the 13 SlGRF genes. In silico analysis of protein motif organization, intron-exon distribution, and phylogenetic classification conīŦrmed the presence of GRF proteins in tomato...
May 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28495891/trimethylguanosine-synthase-1-tgs1-is-essential-for-chilling-tolerance
#12
Jinpeng Gao, James G Wallis, Jeremy Burke Jewell, John Browse
Chilling stress is a major factor limiting plant development and crop productivity. Because the plant response to chilling is so complex, we are far from understanding the genes important in the response to chilling. To identify new genes important in chilling tolerance we conducted a novel mutant screen, combining a confirmed SALK T-DNA insertion collection with traditional forward genetics. We screened a pool of more than 3700 confirmed homozygous SALK T-DNA insertion lines for visible defects under prolonged growth at 5{degree sign}C...
May 11, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28486617/vppub24-a-novel-gene-from-chinese-grapevine-vitis-pseudoreticulata-targets-vpice1-to-enhance-cold-tolerance
#13
Wenkong Yao, Lei Wang, Jie Wang, Fuli Ma, Yazhou Yang, Chen Wang, Weihuo Tong, Jianxia Zhang, Yan Xu, Xiping Wang, Chaohong Zhang, Yuejin Wang
The ubiquitination system plays important roles in the degradation and modification of substrate proteins. In this study, we characterize a putative U-box type E3 ubiquitin ligase gene, VpPUB24 (plant U-box protein 24), from Chinese wild grapevine, Vitis pseudoreticulata accession Baihe-35-1. We show that VpPUB24 is induced by a number of stresses, especially cold treatment. Real-time PCR analysis indicated that the PUB24 transcripts were increased after cold stress in different grapevine species, although the relative expression level was different...
May 9, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28486137/cloning-and-characterization-of-a-novel-gigantea-gene-in-sweet-potato
#14
Wei Tang, Hui Yan, Zai-Xing Su, Sung-Chul Park, Ya-Ju Liu, Yun-Gang Zhang, Xin Wang, Meng Kou, Dai-Fu Ma, Sang-Soo Kwak, Qiang Li
The transition from vegetative to reproductive growth, a key event in the lifecycle of a plant, is affected by environmental stresses. The flowering-time regulator GIGANTEA (GI) may be contributing to susceptibility of the regulation of photoperiodic flowering, circadian rhythm control, and abiotic stress resistance in Arabidopsis. However, the role of GI in sweet potato remains unknown. Here, we isolated and characterized a GI gene (IbGI) from sweet potato (Ipomoea batatas [L.] Lam). The IbGI cDNA sequence was isolated based on information from a sweet potato transcriptome database...
April 27, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28483057/long-chain-base-kinase1-affects-freezing-tolerance-in-arabidopsis-thaliana
#15
Xiaozhen Huang, Yao Zhang, Xiaoyan Zhang, Yiting Shi
Long-chain base kinases (LCBKs) phosphorylate sphingolipid-derived long-chain base lipids and participate in the regulation of stress responses in plants. Here, we isolated a novel Arabidopsis thaliana mutant, lcbk1-2, which was extremely sensitive to freezing temperatures with or without cold acclimation. Physiological assays revealed that concentrations of osmolytes (proline and soluble sugars) and the activity of superoxide dismutase were significantly decreased in the lcbk1-2 mutant, compared with wild type...
June 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28483054/a-novel-class-i-chitinase-from-hippophae-rhamnoides-indications-for-participating-in-ice-cbf-cold-stress-signaling-pathway
#16
Prakriti Kashyap, Renu Deswal
Plant chitinases are the members of PR (Pathogenesis related) proteins family and protect plants from biotic and abiotic stress. A novel chitinase HrCHI1 (Accession number JQ289153) of 954bp ORF encoding 317 amino acids protein was cloned, expressed and characterized from seabuckthorn, a cold/freeze tolerant shrub. The 3D structure (predicted with I-TASSER server) showed highest homology with Oryza sativa class I chitinase (PDB 2dkvA). Putative promoter region (obtained by genome walking) showed GCC box, E-boxes, the binding site for bHLH proteins and DRE elements, the CBF (C-repeat binding factor) binding site besides TATA and CAAT boxes...
June 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28474472/analysis-of-brassica-oleracea-early-stage-abiotic-stress-responses-reveals-tolerance-in-multiple-crop-types-and-for-multiple-sources-of-stress
#17
Andrew M Beacham, Paul Hand, David A C Pink, James M Monaghan
BACKGROUND: Brassica oleracea includes a number of important crop types such as cabbage, cauliflower, broccoli and kale. Current climate conditions and weather patterns are causing significant losses in these crops, meaning that new cultivars with improved tolerance of one or more abiotic stress types must be sought. We assayed genetically fixed B. oleracea lines belonging to a Diversity Fixed Foundation Set (DFFS) for their response to seedling stage-imposed drought, flood, salinity, heat and cold stress...
May 5, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28466470/an-osmotin-from-the-resurrection-plant-tripogon-loliiformis-tlosm-confers-tolerance-to-multiple-abiotic-stresses-in-transgenic-rice
#18
Thi Thuy Trang Le, Brett Williams, Sagadevan Mundree
Osmotin is a key protein associated with abiotic and biotic stress response in plants. In this study, an osmotin from the resurrection plant Tripogon loliiformis (TlOsm) was characterized and functionally analyzed under abiotic stress conditions in T. loliiformis as well as in transgenic Nicotiana tabacum (tobacco) and Oryza sativa (rice) plants. Real-time PCR analysis on mixed elicitor cDNA libraries from T. loliiformis showed that TlOsm was upregulated a thousand-fold during the early stages of osmotic stresses (cold, drought, and salinity) in both shoots and roots but down-regulated in shoots during heat stress...
May 3, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/28464070/genome-wide-analysis-of-soybean-containing-genes-a-functional-investigation-of
#19
Hui Yang, Guixia Shi, Hongyang Du, Hong Wang, Zhenzhen Zhang, Dezhou Hu, Jiao Wang, Fang Huang, Deyue Yu
Plant-specific () genes play critical roles in various plant growth and development processes. However, the number and characteristics of genes in soybean [ (L.) Merr.] remain unknown. Here, we identified 90 homologous genes in the soybean genome that phylogenetically clustered into two classes (I and II). The majority of the genes were evenly distributed across all 20 soybean chromosomes, and 77 (81.11%) of them were detected in segmental duplicated regions. Furthermore, the exon-intron organization and motif composition for each were analyzed...
March 2017: Plant Genome
https://www.readbyqxmd.com/read/28461726/insights-into-a-key-sulfite-scavenger-enzyme-sulfite-oxidase-sox-gene-in-plants
#20
Ertugrul Filiz, Recep Vatansever, Ibrahim Ilker Ozyigit
Sulfite oxidase (SOX) is a crucial molybdenum cofactor-containing enzyme in plants that re-oxidizes the sulfite back to sulfate in sulfite assimilation pathway. However, studies of this crucial enzyme are quite limited hence this work was attempted to understand the SOXs in four plant species namely, Arabidopsis thaliana, Solanum lycopersicum, Populus trichocarpa and Brachypodium distachyon. Herein studied SOX enzyme was characterized with both oxidoreductase molybdopterin binding and Mo-co oxidoreductase dimerization domains...
April 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
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