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heat stress plant

Wenlei Wang, Fei Teng, Yinghui Lin, Dehua Ji, Yan Xu, Changsheng Chen, Chaotian Xie
Pyropia haitanensis, a high-yield commercial seaweed in China, is currently undergoing increasing levels of high-temperature stress due to gradual global warming. The mechanisms of plant responses to high temperature stress vary with not only plant type but also the degree and duration of high temperature. To understand the mechanism underlying thermal tolerance in P. haitanensis, gene expression and regulation in response to short- and long-term temperature stresses (SHS and LHS) was investigated by performing genome-wide high-throughput transcriptomic sequencing for a high temperature tolerant strain (HTT)...
2018: PloS One
Bo Wang, Huihui Du, Zhengpei Yao, Cai Ren, Li Ma, Jiao Wang, Hua Zhang, Hao Ma
Haloxylon ammodendron plays an important role in maintaining the structure and function of the entire ecosystem where it grows. No suitable reference genes have been reported in H. ammodendron plants to date. In this study, a total of 8 reference genes ( 18S , ACT1 , ACT7 , UBC18 , TUA5 , GAPDH , EF - 1α and UBQ10 ) were selected from the available trancriptome database, and the expression stability of these 8 candidate genes was validated under different abiotic stress with three different statistical algorithms (geNorm, NormFinder and BestKeeper)...
May 2018: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
Julie E Chaves, Anastasios Melis
The renewable production of isoprene hydrocarbons, to serve as fuel and synthetic chemistry feedstock, has attracted interest in the field recently. Isoprene (C5 H8 ) is naturally produced from sunlight, CO2 and H2 O photosynthetically in terrestrial plant chloroplasts via the terpenoid biosynthetic pathway and emitted in the atmosphere as a response to heat stress. Efforts to institute a high-capacity continuous and renewable process have included heterologous expression of the isoprene synthesis pathway in photosynthetic microorganisms...
April 24, 2018: FEBS Letters
Barbara Hawrylak-Nowak, Sławomir Dresler, Katarzyna Rubinowska, Renata Matraszek-Gawron, Weronika Woch, Mirza Hasanuzzaman
We examined the possibility to enhance the growth and the physiological tolerance of lamb's lettuce (Valerianella locusta L.) grown under heat stress (HS) by biofortification with selenium (Se). The plants were grown at optimal (22/19 °C; day/night) or high (35/22 °C; day/night) temperature and Se was applied via foliar or soil treatment. The HS reduced plant biomass and photosynthetic pigment concentration and impaired some parameters of chlorophyll a fluorescence. The lamb's lettuce grown under HS accumulated large amounts of H2 O2 in the leaves, especially in younger ones...
April 18, 2018: Plant Physiology and Biochemistry: PPB
William Edward Dyer
Herbicide-resistant weeds, especially those with resistance to multiple herbicides, represent a growing worldwide threat to agriculture and food security. Natural selection for resistant genotypes may act on standing genetic variation, or on a genetic and physiological background that is fundamentally altered because of stress responses to sublethal herbicide exposure. Stress-induced changes include DNA mutations, epigenetic alterations, transcriptional remodeling, and protein modifications, all of which can lead to herbicide resistance and a wide range of pleiotropic effects...
April 24, 2018: Pest Management Science
Lovely Mae F Lawas, Ellen Zuther, Sv Krishna Jagadish, Dirk K Hincha
Global climate change leads to increased temperatures and decreased precipitation in many parts of the world. The simultaneous occurrence of high temperature and water deficit results in heat stress damage in plants. Cereals provide the majority of calories for human consumption, making this stress scenario particularly threatening for global food security. Several studies in both dicots and cereals indicate that the molecular reactions of plants to combined stresses cannot be predicted from reactions to single stresses...
April 16, 2018: Current Opinion in Plant Biology
Shuang-Shuang Chen, Jing Jiang, Xiao-Jiao Han, Yun-Xing Zhang, Ren-Ying Zhuo
Sedum alfredii Hance, a cadmium (Cd)/zinc (Zn)/lead (Pb) co-hyperaccumulating species, is a promising phytoremediation candidate because it accumulates substantial amounts of heavy metal ions without showing any obvious signs of poisoning. The heat shock transcription factor (Hsf) family plays crucial roles in plant growth, development, and stress responses. Although the roles of some Hsfs in abiotic stress have been well studied in model plants, the Hsf family has not been systematically investigated in heavy metal hyperaccumulators...
April 17, 2018: International Journal of Molecular Sciences
Reiofeli A Salas-Perez, Christopher A Saski, Rooksana E Noorai, Subodh K Srivastava, Amy L Lawton-Rauh, Robert L Nichols, Nilda Roma-Burgos
Amaranthus palmeri (Amaranthaceae) is a noxious weed in several agroecosystems and in some cases seriously threatens the sustainability of crop production in North America. Glyphosate-resistant Amaranthus species are widespread, prompting the use of alternatives to glyphosate such as glufosinate, in conjunction with glufosinate-resistant crop cultivars, to help control glyphosate-resistant weeds. An experiment was conducted to analyze the transcriptome of A. palmeri plants that survived exposure to 0.55 kg ha-1 glufosinate...
2018: PloS One
Mohamed A Farag, Achim Meyer, Sara E Ali, Mohamed A Salem, Patrick Giavalisco, Hildegard Westphal, Ludger A Wessjohann
Chronic exposure to ocean acidification and elevated sea-surface temperatures pose significant stress to marine ecosystems. This in turn necessitates costly acclimation responses in corals in both the symbiont and host, with a re-organization of cell metabolism and structure. A large-scale untargeted metabolomics approach comprising gas chromatography mass spectrometry (GC-MS) and ultra performance liquid chromatography coupled to high resolution mass spectrometry (UPLC-MS) was applied to profile the metabolite composition of the soft coral Sarcophyton ehrenbergi and its dinoflagellate symbiont...
April 19, 2018: Journal of Proteome Research
Matthew Haworth, Claire M Belcher, Dilek Killi, Rebecca A Dewhirst, Alessandro Materassi, Antonio Raschi, Mauro Centritto
Global warming events have coincided with turnover of plant species at intervals in Earth history. As mean global temperatures rise, the number, frequency and duration of heat-waves will increase. Ginkgo biloba was grown under controlled climatic conditions at two different day/night temperature regimes (25/20 °C and 35/30 °C) to investigate the impact of heat stress. Photosynthetic CO2 -uptake and electron transport were reduced at the higher temperature, while rates of respiration were greater; suggesting that the carbon balance of the leaves was adversely affected...
April 18, 2018: Scientific Reports
Yulia Yarkhunova, Carmela R Guadagno, Matthew J Rubin, Seth J Davis, Brent E Ewers, Cynthia Weinig
The circadian clock regulates many aspects of leaf gas supply and biochemical demand for CO2 , and is hypothesized to improve plant performance. Yet the extent to which the clock may regulate the efficiency of photosystem II (PSII) and photoprotective mechanisms such as heat dissipation is less explored. Based on measurements of chlorophyll a fluorescence, we estimated the maximum efficiency of photosystem II in light (Fv'/Fm') and heat dissipation by non-photochemical quenching (NPQ). We further dissected total NPQ into its main components, qE (pH-dependent quenching), qT (state-transition quenching) and qI (quenching related to photoinhibition), in clock mutant genotypes of Arabidopsis thaliana, the cognate wild-type genotypes, and a panel of recombinant inbred lines (RILs) expressing quantitative variation in clock period...
April 17, 2018: Plant, Cell & Environment
Aurore Palud, Hélène Scornec, Jean-François Cavin, Hélène Licandro
Lactic acid bacteria (LAB) are associated with various plant, animal, and human niches and are also present in many fermented foods and beverages. Thus, they are subjected to several stress conditions and have developed advanced response mechanisms to resist, adapt, and grow. This work aimed to identify the genes involved in some stress adaptation mechanisms in LAB. For this purpose, global reverse genetics was applied by screening a library of 1287 Lactobacillus paracasei transposon mutants for mild monofactorial stresses...
2018: Frontiers in Microbiology
Margaret Gruber, Ushan Alahakoon, Ali Taheri, Nayidu Nagubushana, Rong Zhou, Banyar Aung, Andrew Sharpe, Abdelali Hannoufa, Peta Bonham-Smith, Dwayne D Hegedus D
BACKGROUND: Previously, transgenic trichome-bearing (hairy leaf) Brassica napus lines expressing either the Arabidopsis thaliana GL3 gene (line AtGL3+) [1] or the AtGL3 gene in combination with an RNAi construct to down-regulate TTG1 (line K-5-8) [2] were developed. The leaves of these lines exhibited altered insect feeding (flea beetle) and oviposition (diamondback moth) behaviour compared to the non-transgenic semi-glabrous leaves of B. napus cv. Westar. Interestingly, the cotyledons of these lines remained glabrous, but also showed reduced feeding by flea beetles...
April 16, 2018: BMC Plant Biology
Yunxie Wei, Guoyin Liu, Yanli Chang, Chaozu He, Haitao Shi
As the terminal components of signal transduction, heat stress transcription factors (Hsfs) mediate the activation of multiple genes responsive to various stresses. However, the information and functional analysis are very limited in non-model plants, especially in cassava (Manihot esculenta), one of the most important crops in the tropical area. In this study, 32 MeHsfs were identified from cassava genome, the evolutionary tree, gene structures and motifs were also analyzed. Gene expression analysis found that MeHsfs were commonly regulated by Xanthomonas axonopodis pv manihotis (Xam)...
April 16, 2018: Molecular Plant Pathology
Ghazala Nawaz, Kwanuk Lee, Su Jung Park, Yeon-Ok Kim, Hunseung Kang
Although the roles of many DEAD-box RNA helicases (RHs) have been determined in the nucleus as well as in cytoplasm during stress responses, the importance of chloroplast-targeted DEAD-box RHs in stress response remains largely unknown. In this study, we determined the function of BrRH22, a chloroplast-targeted DEAD-box RH in cabbage (Brassica rapa), in abiotic stress responses. The expression of BrRH22 was markedly increased by drought, heat, salt, or cold stress and by ABA treatment, but was largely decreased by UV stress...
April 7, 2018: Plant Physiology and Biochemistry: PPB
Ambika Dudhate, Harshraj Shinde, Daisuke Tsugama, Shenkui Liu, Tetsuo Takano
Pearl millet is a cereal crop known for its high tolerance to drought, heat and salinity stresses as well as for its nutritional quality. The molecular mechanism of drought tolerance in pearl millet is unknown. Here we attempted to unravel the molecular basis of drought tolerance in two pearl millet inbred lines, ICMB 843 and ICMB 863 using RNA sequencing. Under greenhouse condition, ICMB 843 was found to be more tolerant to drought than ICMB 863. We sequenced the root transcriptome from both lines under control and drought conditions using an Illumina Hi-Seq platform, generating 139...
2018: PloS One
Xin Cui, Yong-Xin Wang, Zhi-Wei Liu, Wen-Li Wang, Hui Li, Jing Zhuang
The tea plant is an important commercial horticulture crop cultivated worldwide. Yield and quality of this plant are influenced by abiotic stress. The bHLH family transcription factors play a pivotal role in the growth and development, including abiotic stress response, of plants. A growing number of bHLH proteins have been functionally characterized in plants. However, few studies have focused on the bHLH proteins in tea plants. In this study, 120 CsbHLH TFs were identified from tea plants using computational prediction method...
April 12, 2018: Functional & Integrative Genomics
Qiannan Hu, Shuoxin Zhang, Bingru Huang
Strigolactones (SL) have recently been found to play roles in regulating root development. However, it remains unclear how SL may mediate root elongation of perennial grass species under different temperatures that differentially affect root growth. The objectives of this study were to examine effects of SL on root elongation of tall fescue and to examine the interactive effects of SL and auxin in regulating root growth under both non-stress and heat stress conditions. Tall fescue (cv. 'Kentuck-31') plants were treated with GR24 (a synthetic strigolactones), NAA (α-naphthylacetic acid), or NPA (auxin transport inhibitor N-1-naphthylphalamic acid) or their combination under non-stress control and heat stress (35/30 °C) in growth chamber...
June 2018: Plant Science: An International Journal of Experimental Plant Biology
Monika Kosmacz, Marcin Luzarowski, Olga Kerber, Ewa Leniak, Emilio Gutierrez-Beltran, Juan Camilo Moreno Beltran, Michal Gorka, Jagoda Szlachetko, Daniel Veyel, Alexander Graf, Aleksandra Skirycz
2',3'-cyclic adenosine monophosphate (2',3'-cAMP), an intriguing small molecule, is conserved among different kingdoms. This small molecule is presumably produced during RNA degradation, with increased cellular levels especially upon stress conditions. We observed its presence in protein complexes isolated from native Arabidopsis lysate, suggesting that 2',3'-cAMP might have protein partners in plants. Moreover, affinity purification (AP) experiments revealed that 2',3'-cAMP associates with the stress granule (SG) proteome...
April 4, 2018: Plant Physiology
Jérémy Scutenaire, Jean-Marc Deragon, Viviane Jean, Moussa Benhamed, Cécile Raynaud, Jean-Jacques Favory, Rémy Merret, Cécile Bousquet-Antonelli
Methylations at position N6 of internal adenosines (m6As) are the most abundant and widespread mRNA modifications. These modifications play crucial roles in reproduction, growth and development by controlling gene express patterns at the post-transcriptional level. Their function is decoded by readers that share the YTH domain, which forms a hydrophobic pocket that directly accommodates the m6A residues. While the physiological and molecular functions of YTH readers have been extensively studied in animals, little is known about plant readers, even though m6As are crucial for plant survival and development...
April 4, 2018: Plant Cell
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