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heat stress plant

Glaucia M S Pinheiro, Carlos H I Ramos
Chaperones belonging to the small heat shock protein (sHSP) family are ubiquitous and exhibit elevated expression under stresses conditions to protect proteins against aggregation, thereby contributing to the stress tolerance of the organism. Tropical plants are constantly exposed to high temperatures, and the mechanisms by which these plants tolerate heat stress are of foremost importance to basic science as well as applied agrobiotechnology. Therefore, this study aims to characterize sHSPs from different organelles from sugarcane, an important crop that is associated with sugar and bioenergy production...
June 4, 2018: Plant Physiology and Biochemistry: PPB
Waleed S Albihlal, André P Gerber
RNA-binding proteins play essential roles in the post-transcriptional regulation of gene expression. While hundreds of RNA-binding proteins can be predicted computationally, the recent introduction of proteome-wide approaches has dramatically expanded the repertoire of proteins interacting with RNA. Besides canonical RNA-binding proteins that contain characteristic RNA-binding domains, many proteins that lack such domains but have other well-characterised cellular functions were identified; including metabolic enzymes, heat shock proteins, kinases, as well as transcription factors and chromatin-associated proteins...
June 16, 2018: FEBS Letters
Sung Hyun Hong, Bhumi Nath Tripathi, Moon-Soo Chung, Chuloh Cho, Sungbeom Lee, Jin-Hong Kim, Hyoung-Woo Bai, Hyeun-Jong Bae, Jae-Young Cho, Byung Yeoup Chung, Seung Sik Lee
Ascorbate peroxidase (APX) is a class I haem-containing peroxidase, which catalyses the conversion of H2 O2 to H2 O and O2 using ascorbate as the specific electron donor. APX plays a central role in the elimination of intracellular reactive oxygen species (ROS) and protects plants from the oxidative damage that can occur as a result of biotic and abiotic stresses. At present, the only known function of APX is as a peroxidase. However, in this study, we demonstrate that Oryza sativa APX2 also operates as a molecular chaperone in rice...
June 15, 2018: Scientific Reports
Nisha Govender, Siju Senan, Zeti-Azura Mohamed-Hussein, Ratnam Wickneswari
The plant shoot system consists of reproductive organs such as inflorescences, buds and fruits, and the vegetative leaves and stems. In this study, the reproductive part of the Jatropha curcas shoot system, which includes the aerial shoots, shoots bearing the inflorescence and inflorescence were investigated in regard to gene-to-gene interactions underpinning yield-related biological processes. An RNA-seq based sequencing of shoot tissues performed on an Illumina HiSeq. 2500 platform generated 18 transcriptomes...
June 15, 2018: Scientific Reports
Jianhua Xiang, Xiaoyun Zhou, Xianwen Zhang, Ailing Liu, Yanci Xiang, Mingli Yan, Yan Peng, Xinbo Chen
Potassium (K+ ) is one of the essential macronutrients required for plant growth and development, and the maintenance of cellular K+ homeostasis is important for plants to adapt to abiotic stresses and growth. However, the mechanism involved has not been understood clearly. In this study, we demonstrated that AtUNC-93 plays a crucial role in this process under the control of abscisic acid (ABA). AtUNC-93 was localized to the plasma membrane and mainly expressed in the vascular tissues in Arabidopsis thaliana ...
2018: Frontiers in Plant Science
Genaina A DE Souza, Denise C F S Dias, Thaline M Pimenta, Amanda Á Cardoso, Raquel M O Pires, Antônio P Alvarenga, Edgard A T Pícoli
The physical, physiological and biochemical changes during the development until the dispersal of rubber tree seeds were evaluated with the purpose of estimating the point at physiological maturity. A total of 30 plants were selected at different points in a commercial planting area and had their flowers marked during the anthesis and every 15 days after marking. Fruits and seeds were collected for analysis of moisture content, dry matter, diameter and length. Details of the anatomy ultra-structure of the seeds were evaluated...
April 2018: Anais da Academia Brasileira de Ciências
Kayla Thomason, Md Ali Babar, John E Erickson, Michael Mulvaney, Chris Beecher, Greg MacDonald
Genetic improvement for stress tolerance requires a solid understanding of biochemical processes involved with different physiological mechanisms and their relationships with different traits. The objective of this study was to demonstrate genetic variability in altered metabolic levels in a panel of six wheat genotypes in contrasting temperature regimes, and to quantify the correlation between those metabolites with different traits. In a controlled environment experiment, heat stress (35:28 ± 0.08°C) was initiated 10 days after anthesis...
2018: PloS One
He Zhang, Hao Kang, Chulian Su, Yanxiang Qi, Xiaomei Liu, Jinji Pu
The NAC transcription factors involved plant development and response to various stress stimuli. However, little information is available concerning the NAC family in the woodland strawberry. Herein, 37 NAC genes were identified from the woodland strawberry genome and were classified into 13 groups based on phylogenetic analysis. And further analyses of gene structure and conserved motifs showed closer relationship of them in every subgroup. Quantitative real-time PCR evaluation different tissues revealed distinct spatial expression profiles of the FvNAC genes...
2018: PloS One
Hayoung Song, Xiangshu Dong, Hankuil Yi, Ju Young Ahn, Keunho Yun, Myungchul Song, Ching-Tack Han, Yoonkang Hur
For sustainable crop cultivation in the face of global warming, it is important to unravel the genetic mechanisms underlying plant adaptation to a warming climate and apply this information to breeding. Thermomorphogenesis and ambient temperature signaling pathways have been well studied in model plants, but little information is available for vegetable crops. Here, we investigated genes responsive to warming conditions from two Brassica rapa inbred lines with different geographic origins: subtropical (Kenshin) and temperate (Chiifu)...
June 11, 2018: International Journal of Molecular Sciences
Rishi Prasad, Stephan Kpoti Gunn, Clarence Alan Rotz, Heather Karsten, Greg Roth, Anthony Buda, Anne M K Stoner
Corn has been a pillar of American agriculture for decades and continues to receive much attention from the scientific community for its potential to meet the food, feed and fuel needs of a growing human population in a changing climate. By midcentury, global temperature increase is expected to exceed 2°C where local effects on heat, cold and precipitation extremes will vary. The Northeast United States is a major dairy producer, corn consumer, and is cited as the fastest warming region in the contiguous U...
2018: PloS One
Krzysztof Brzezinka, Simone Altmann, Isabel Bäurle
Plants encounter biotic and abiotic stresses many times during their life cycle and this limits their productivity. Moderate heat stress (HS) primes a plant to survive higher temperatures that are lethal in the naïve state. Once temperature stress subsides, the memory of the priming event is actively retained for several days preparing the plant to better cope with recurring HS. Recently, chromatin regulation at different levels has been implicated in HS memory. Here we report that the chromatin protein BRUSHY1/TONSOKU/MGOUN3 (BRU1/TSK/MGO3) plays a role in the HS memory in Arabidopsis thaliana...
June 8, 2018: Plant, Cell & Environment
Mario Keller, Stefan Simm
BACKGROUND: Pollen development is central for plant reproduction and is assisted by changes of the transcriptome and proteome. At the same time, pollen development and viability is largely sensitive to stress, particularly to elevated temperatures. The transcriptomic and proteomic changes during pollen development and of different stages in response to elevated temperature was targeted to define the underlying molecular principles. RESULTS: The analysis of the transcriptome and proteome of Solanum lycopersicum pollen at tetrad, post-meiotic and mature stage before and after heat stress yielded a decline of the transcriptome but an increase of the proteome size throughout pollen development...
June 8, 2018: BMC Genomics
Jibiao Fan, Yan Xie, Zaichao Zhang, Liang Chen
Melatonin ( N -acetyl-5-methoxy-tryptamine) is a universal molecule that is present in animals and plants. It has been detected in different kinds of plants and organs in different levels. Melatonin in plants shares the same initial biosynthesis compound with auxin, and therefore functions as indole-3-acetic acid like hormones. Moreover, melatonin is involved in regulating plant growth and development, protecting plants against biotic and abiotic stresses, such as salt, drought, cold, heat and heavy metal stresses...
May 21, 2018: International Journal of Molecular Sciences
Halina I Falfushynska, Lesya L Gnatyshyna, Anna V Ivanina, Inna M Sokolova, Oksana B Stoliar
Bivalve mollusks from the cooling reservoirs of fuel power plants (PP) are acclimated to the chronic heating and chemical pollution. We investigated stress responses of the mussels from these ponds to determine their tolerance to novel environmental pollutant, zinc oxide nanoparticles (nZnO). Male Unio tumidus from the reservoirs of Dobrotvir and Burschtyn PPs (DPP and BPP), Ukraine were exposed for 14 days to nZnO (3.1 μM), Zn2+ (3.1 μM) at 18 °C, elevated temperature (T, 25 °C), or nZnO at 25 °C (nZnO + T)...
February 2018: Chemosphere
Junming Zhao, Shuangrong Yuan, Man Zhou, Ning Yuan, Zhigang Li, Qian Hu, Frank G Bethea, Haibo Liu, Shigui Li, Hong Luo
MicroRNA393 (miR393) has been implicated in plant growth, development, and multiple stress responses in annual species such as Arabidopsis and rice. However, the role of miR393 in perennial grasses remains unexplored. Creeping bentgrass (Agrostis stolonifera L.) is an environmentally and economically important C3 cool-season perennial turfgrass. Understanding how miR393 functions in this representative turf species would allow the development of novel strategies in genetically engineering grass species for improved abiotic stress tolerance...
June 6, 2018: Plant Biotechnology Journal
Fang Ding, Victoria Allen, Weiqi Luo, Shouan Zhang, Yongping Duan
Huanglongbing (HLB), a destructive plant bacterial disease, severely impedes worldwide citrus production. In our previous reports, we revealed the molecular mechanisms of host plant responses that underlie thermotherapy against HLB. In this study, we investigated the molecular mechanism underlying heat or tetracycline treatments on the HLB bacterium, ' Candidatus Liberibacter asiaticus' (Las) by focusing on Las prophage/phage conversion under stress conditions. By comparing the prophage FP1 and FP2 copy number to the copy number of 16S rDNA in HLB-affected plants, we found that the relative copy number of both FP1 and FP2 increased significantly, ranging from 3...
2018: Horticulture Research
Xin Li, Hao Feng, JiangQi Wen, Jiangli Dong, Tao Wang
Symbiotic nitrogen fixation (SNF) in legume root nodules injects millions of tons of nitrogen into agricultural lands and provides ammonia to non-legume crops under N-deficient conditions. During plant growth and development, environmental stresses, such as drought, salt, cold, and heat stress are unavoidable. This raises an interesting question as to how the legumes cope with the environmental stress along with SNF. Under drought stress, dehydrin proteins are accumulated, which function as protein protector and osmotic substances...
2018: Frontiers in Plant Science
Zhou Li, Yan Peng, Bingru Huang
Gamma-aminobutyric acid (GABA) may play a positive role in regulating plant tolerance to drought or heat stress. The objectives of this study were to investigate the physiological effects of GABA on tolerance of creeping bentgrass ( Agrostis stolonifera ) to heat and drought stress and to determine whether enhanced heat and drought tolerance due to GABA treatment was associated with the up-regulation of selected genes and transcriptional factors involved in stress protection. Creeping bentgrass (cultivar "Penncross") plants were treated with 0...
May 31, 2018: International Journal of Molecular Sciences
Maria N Danilova, Natalia V Kudryakova, Alexandra A Andreeva, Anastasia S Doroshenko, Elena S Pojidaeva, Victor V Kusnetsov
Heat shock is one of the major abiotic factors that causes severe retardation in plant growth and development. To dissect the principal effects of hyperthermia on chloroplast gene expression, we studied the temporal dynamics of transcript accumulation for chloroplast-encoded genes in Arabidopsis thaliana and genes for the chloroplast transcription machinery against a background of changes in physiological parameters. A marked reduction in the transcript amounts of the majority of the genes at the early phases of heat shock (HS) was followed by a return to the baseline levels of rbcL and the housekeeping genes clpP, accD, rps14 and rrn16...
May 23, 2018: Plant Physiology and Biochemistry: PPB
Mintao Sun, Fangling Jiang, Benjian Cen, Junqin Wen, Yanzhao Zhou, Zhen Wu
Thermotolerance is improved by heat stress (HS) acclimation, and the thermotolerance level is 'remembered' by plants. However, the underlying signalling mechanisms remain largely unknown. Here, we showed NADPH-oxidase-mediated H2 O2 (NADPH-H2 O2 ) and chloroplast-H2 O2 promoted the sustained expression of HS-responsive genes and programmed cell death (PCD) genes, respectively, during recovery after HS-acclimation. When spraying the NADPH-oxidase inhibitor, diphenylene iodonium (DPI), after HS-acclimation, the NADPH-H2 O2 level significantly decreased, resulting in a decrease in the expression of HS-responsive genes and the loss of maintenance of acquired thermotolerance (MAT)...
May 31, 2018: Plant, Cell & Environment
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