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https://www.readbyqxmd.com/read/28448201/cellular-polyamines-modulate-mrna-stability
#1
Haoxi Chai, Wannian Yang, Huazhong Shi
Polyamines (PAs) are polycationic compounds found in all living organisms and play crucial roles in growth and survival. PAs interact with and modulate the functions of anionic macromolecules such as DNA, RNA and proteins. LHR1/PUT3 is a polyamine influx transporter localized in the plasma membrane in Arabidopsis. In our recent paper in The Plant Journal, (1) we demonstrated that LHR1/PUT3 has a pivotal role in stabilizing the mRNAs of several important heat stress responsive genes under high temperature. In this short communication, we discuss about a putative pathway for modulating the PUT3 transport activity and the significance of evolutionary variations in PUT3 in Arabidopsis...
April 27, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28444544/methylglyoxal-detoxification-by-a-dj-1-family-protein-provides-dual-abiotic-and-biotic-stress-tolerance-in-transgenic-plants
#2
Prasad Melvin, Kondalarao Bankapalli, Patrick D'Silva, P V Shivaprasad
Methylglyoxal (MG) is a key signaling molecule resulting from glycolysis and other metabolic pathways. During abiotic stress, MG levels accumulate to toxic levels in affected cells. However, MG is routinely detoxified through the action of DJ1/PARK7/Hsp31 proteins that are highly conserved across kingdoms and mutations in such genes are associated with neurodegenerative diseases. Here, we report for the first time that, similar to abiotic stresses, MG levels increase during biotic stresses in plants, likely contributing to enhanced susceptibility to a wide range of stresses...
April 25, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28442596/tissue-specific-transcriptomics-reveals-an-important-role-of-the-unfolded-protein-response-in-maintaining-fertility-upon-heat-stress-in-arabidopsis
#3
Shuang-Shuang Zhang, Hongxing Yang, Lan Ding, Ze-Ting Song, Hong Ma, Fang Chang, Jian-Xiang Liu
Elevated temperatures have a great impact on plant reproductive development and subsequent fruit and seed set, but the underlying molecular mechanisms are not well understood. We used transcriptome profiling to investigate the effect of heat stress on reproductive development of Arabidopsis (Arabidopsis thaliana) seedlings and observed distinct response patterns in vegetative vs. reproductive tissues. Exposure to heat stress affected reproductive developmental programs including early phases of anther/ovule development and meiosis, Also, genes participating in the unfolded protein response (UPR) were enriched in the reproductive tissue-specific genes that were up-regulated by heat...
April 24, 2017: Plant Cell
https://www.readbyqxmd.com/read/28439286/snp-discovery-and-genetic-variation-of-candidate-genes-relevant-to-heat-tolerance-and-agronomic-traits-in-natural-populations-of-sand-rice-agriophyllum-squarrosum
#4
Pengshan Zhao, Jiwei Zhang, Chaoju Qian, Qin Zhou, Xin Zhao, Guoxiong Chen, Xiao-Fei Ma
The extreme stress tolerance and high nutritional value of sand rice (Agriophyllum squarrosum) make it attractive for use as an alternative crop in response to concerns about ongoing climate change and future food security. However, a lack of genetic information hinders understanding of the mechanisms underpinning the morphological and physiological adaptations of sand rice. In the present study, we sequenced and analyzed the transcriptomes of two individuals representing semi-arid [Naiman (NM)] and arid [Shapotou (SPT)] sand rice genotypes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28434155/nitrogen-fertility-and-abiotic-stresses-management-in-cotton-crop-a-review
#5
Aziz Khan, Daniel Kean Yuen Tan, Muhammad Zahir Afridi, Honghai Luo, Shahbaz Atta Tung, Mir Ajab, Shah Fahad
This review outlines nitrogen (N) responses in crop production and potential management decisions to ameliorate abiotic stresses for better crop production. N is a primary constituent of the nucleotides and proteins that are essential for life. Production and application of N fertilizers consume huge amounts of energy, and excess is detrimental to the environment. Therefore, increasing plant N use efficiency (NUE) is important for the development of sustainable agriculture. NUE has a key role in crop yield and can be enhanced by controlling loss of fertilizers by application of humic acid and natural polymers (hydrogels), having high water-holding capacity which can improve plant performance under field conditions...
April 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28426278/hop3-a-new-regulator-of-the-er-stress-response-in-arabidopsis-with-possible-implications-in-plant-development-and-response-to-biotic-and-abiotic-stresses
#6
Nuria Fernández-Bautista, Lourdes Fernández-Calvino, Alfonso Muñoz, M Mar Castellano
HOPs (heat shock protein 70 (HSP70)-heat shock protein 90 (HSP90) organizing proteins) are a highly conserved family of cytosolic cochaperones. In a recent study we showed that HOP3, one member of the HOP family in Arabidopsis, plays an essential role during endoplasmic reticulum (ER) stress in plants. Interestingly, we also demonstrated that AtHOP3 interacts with binding immunoglobulin protein (BiP), a major ER-resident chaperone. All these data suggest that HOP3 could assist BiP in protein folding in the ER...
April 20, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28425127/manipulation-of-glyoxalase-pathway-confers-tolerance-to-multiple-stresses-in-rice
#7
Brijesh K Gupta, Khirod K Sahoo, Ajit Ghosh, Amit K Tripathi, Khalid Anwar, Priyanka Das, Anil K Singh, Ashwani Pareek, Sudhir K Sopory, Sneh L Singla-Pareek
Crop plants face a multitude of diverse abiotic and biotic stresses in the farmers' fields. Although there now exists a considerable knowledge of the underlying mechanisms of response to individual stresses, the cross-talk between response pathways to various abiotic and biotic stresses remains enigmatic. Here, we investigated if the cytotoxic metabolite methylglyoxal (MG), excess of which is generated as a common consequence of many abiotic and biotic stresses, may serve as a key molecule linking responses to diverse stresses...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28416696/zeaxanthin-dependent-nonphotochemical-quenching-does-not-occur-in-photosystem-i-in-the-higher-plant-arabidopsis-thaliana
#8
Lijin Tian, Pengqi Xu, Volha U Chukhutsina, Alfred R Holzwarth, Roberta Croce
Nonphotochemical quenching (NPQ) is the process that protects the photosynthetic apparatus of plants and algae from photodamage by dissipating as heat the energy absorbed in excess. Studies on NPQ have almost exclusively focused on photosystem II (PSII), as it was believed that NPQ does not occur in photosystem I (PSI). Recently, Ballottari et al. [Ballottari M, et al. (2014) Proc Natl Acad Sci USA 111:E2431-E2438], analyzing PSI particles isolated from an Arabidopsis thaliana mutant that accumulates zeaxanthin constitutively, have reported that this xanthophyll can efficiently induce chlorophyll fluorescence quenching in PSI...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28414129/the-arabidopsis-endoplasmic-reticulum-associated-degradation-pathways-are-involved-in-the-regulation-of-heat-stress-response
#9
Lin-Mao Li, Shi-You Lü, Rong-Jun Li
The Cytosolic Protein Response (CPR) in the cytosol and the Unfolded Protein Response (UPR) and ER-associated degradation (ERAD) in the endoplasmic reticulum are major pathways of the cellular proteostasis network. However, despite years of effort, how these protein quality control systems coordinated in vivo remains largely unknown, particularly in plants. In this study, the roles of two evolutionarily conserved ERAD pathways (DOA10 and HRD1) in heat stress response were investigated through reverse genetic approaches in Arabidopsis...
April 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28411550/nature-based-solutions-to-mitigate-soil-sealing-in-urban-areas-results-from-a-4-year-study-comparing-permeable-porous-and-impermeable-pavements
#10
A Fini, P Frangi, J Mori, D Donzelli, F Ferrini
Soil sealing is one of the most pervasive forms of soil degradation that follows urbanization and, despite innovative pavements (i.e. pervious) are being installed in urban areas to mitigate it, there is little research on the effects of pervious pavements on soil water and carbon cycle and on the physiology of urban trees. The aim of this 4-year experiment was to assess the effects of three pavements, differing in permeability to water and gases, on some soil physical parameters, and on growth and physiology of newly planted Celtis australis and Fraxinus ornus...
April 12, 2017: Environmental Research
https://www.readbyqxmd.com/read/28401337/rrm-domain-of-arabidopsis-splicing-factor-sf1-is-important-for-pre-mrna-splicing-of-a-specific-set-of-genes
#11
Keh Chien Lee, Yun Hee Jang, Soon-Kap Kim, Hyo-Young Park, May Phyo Thu, Jeong Hwan Lee, Jeong-Kook Kim
The RNA recognition motif of Arabidopsis splicing factor SF1 affects the alternative splicing of FLOWERING LOCUS M pre-mRNA and a heat shock transcription factor HsfA2 pre-mRNA. Splicing factor 1 (SF1) plays a crucial role in 3' splice site recognition by binding directly to the intron branch point. Although plant SF1 proteins possess an RNA recognition motif (RRM) domain that is absent in its fungal and metazoan counterparts, the role of the RRM domain in SF1 function has not been characterized. Here, we show that the RRM domain differentially affects the full function of the Arabidopsis thaliana AtSF1 protein under different experimental conditions...
April 11, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28400748/short-term-exposure-of-paddy-soil-microbial-communities-to-salt-stress-triggers-different-transcriptional-responses-of-key-taxonomic-groups
#12
Jingjing Peng, Carl-Eric Wegner, Werner Liesack
Soil salinization due to seawater intrusion along coastal areas is an increasing threat to rice cultivation worldwide. While the detrimental impact on rice growth and yield has been thoroughly studied, little is known about how severe salinity affects structure and function of paddy soil microbial communities. Here, we examined their short-term responses to half- and full-strength seawater salinity in controlled laboratory experiments. Slurry microcosms were incubated under anoxic conditions, with rice straw added as carbon source...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28400323/arabidopsis-transcription-factors-spl1-and-spl12-confer-plant-thermotolerance-at-reproductive-stage
#13
Lu-Men Chao, Yao-Qian Liu, Dian-Yang Chen, Xue-Yi Xue, Ying-Bo Mao, Xiao-Ya Chen
Plant reproductive organs are vulnerable to heat, but regulation of heat shock responses (HSRs) in inflorescence is largely uncharacterized. Here, we report that two of the SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) transcriptional factors in Arabidopsis, SPL1 and SPL12, act redundantly in thermotolerance at reproductive stage. The spl1-1 spl12-1 inflorescences displayed hypersensitivity to heat stress, whereas overexpression of SPL1 or SPL12 enhanced the thermotolerance in both Arabidopsis and tobacco. RNA-seq revealed 1,939 upregulated and 1,479 downregulated genes in wild-type inflorescence upon heat stress, among which one quarter (1,040) was misregulated in spl1-1 spl12-1, indicating that the two SPLs contribute greatly to the heat-triggered transcriptional reprogramming in inflorescence...
April 8, 2017: Molecular Plant
https://www.readbyqxmd.com/read/28399214/an-e3-ubiquitin-ligase-from-brassica-napus-induces-a-typical-heat-shock-response-in-its-own-way-in-escherichia-coli
#14
Fei Huang, Yulong Niu, Zhibin Liu, Weifeng Liu, Xufeng Li, Hong Tan, Yi Yang
Previously, we have identified a novel E3 ubiquitin ligase, BNTR1, which plays a key role in heat stress response in Brassica napus. In this study, we accidentally found that BNTR1 can also improve thermal tolerance and reduce growth inhibition at 42°C in Escherichia coli, in a manner different from that in plant. We show that BNTR1 activates E. coli heat-shock response at low concentration in soluble form instead of in inclusion body, but BNTR1 is not functioning as a heat-shock protein (HSP) because deficient temperature-sensitive mutants of HSP genes display unconspicuous thermal tolerance in the presence of BNTR1...
March 1, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28391379/heat-stress-induced-effects-of-photosystem-i-an-overview-of-structural-and-functional-responses
#15
REVIEW
Alexander G Ivanov, Maya Y Velitchkova, Suleyman I Allakhverdiev, Norman P A Huner
Temperature is one of the main factors controlling the formation, development, and functional performance of the photosynthetic apparatus in all photoautotrophs (green plants, algae, and cyanobacteria) on Earth. The projected climate change scenarios predict increases in air temperature across Earth's biomes ranging from moderate (3-4 °C) to extreme (6-8 °C) by the year 2100 (IPCC in Climate change 2007: The physical science basis: summery for policymakers, IPCC WG1 Fourth Assessment Report 2007; Climate change 2014: Mitigation of Climate Change, IPCC WG3 Fifth Assessment Report 2014)...
April 8, 2017: Photosynthesis Research
https://www.readbyqxmd.com/read/28389176/identification-of-the-abiotic-stress-related-transcription-in-little-neptune-grass-cymodocea-nodosa-with-rna-seq
#16
E E Malandrakis, O Dadali, M Kavouras, T Danis, P Panagiotaki, H Miliou, F C Kuepper, A Exadactylos
Seagrasses exhibit vital ecological roles in the marine environment. Nevertheless, the genomic resources available for seagrasses are still scarce. In the present study, the transcriptome of Cymodocea nodosa was sequenced with a view to study the molecular mechanisms underlying abiotic stress responses. The sequenced transcriptome for the species was near-complete and a high percentage of the transcripts was computationally annotated. An experimental simulation of marine plant exposure to extreme temperature (34°C), salinity (50psu) and their combination was conducted...
April 4, 2017: Marine Genomics
https://www.readbyqxmd.com/read/28388488/genome-wide-identification-of-heat-stress-responsive-small-rnas-in-tall-fescue-festuca-arundinacea-by-high-throughput-sequencing
#17
Huiying Li, Tao Hu, Erick Amombo, Jinmin Fu
MicroRNAs (miRNAs) play vital roles in the adaptive response of plants to various abiotic and biotic stresses. Tall fescue (Festuca arundinacea Schreb.) is a major cool-season forage and turf grass species which is severely influenced by heat stress. To unravel possible heat stress-responsive miRNAs, high-throughput sequencing was employed for heat-tolerant PI578718 and heat-sensitive PI234881 genotypes growing in presence and absence of heat stress (40°C for 36h). By searching against the miRBase database, among 1421 reference monocotyledon miRNAs, more than 850 were identified in all samples...
March 10, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28386551/overexpression-of-caapx-induces-orchestrated-reactive-oxygen-scavenging-and-enhances-cold-and-heat-tolerances-in-tobacco
#18
Jiangying Wang, Bin Wu, Hengfu Yin, Zhengqi Fan, Xinlei Li, Sui Ni, Libo He, Jiyuan Li
Ascorbate peroxidase (APX) acts indispensably in synthesizing L-ascorbate (AsA) which is pivotal to plant stress tolerance by detoxifying reactive oxygen species (ROS). Enhanced activity of APX has been shown to be a key step for genetic engineering of improving plant tolerance. However it needs a deeper understanding on the maintenance of cellular ROS homeostasis in response to stress. In this study, we identified and characterized an APX (CaAPX) gene from Camellia azalea. Quantitative real-time PCR (qRT-PCR) analysis showed that CaAPX was expressed in all tissues and peaked in immature green fruits; the expression levels were significantly upregulated upon cold and hot stresses...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28381503/pectin-methylesterase34-contributes-to-heat-tolerance-through-its-role-in-promoting-stomatal-movement
#19
Ya-Chen Huang, Hui-Chen Wu, Yin-Da Wang, Chia-Hung Liu, Ching-Chih Lin, Dan-Li Luo, Tsung-Luo Jinn
Pectin, a major component of the primary cell wall, is synthesized in the Golgi apparatus and exported to the cell wall in a highly methylesterified form, then is partially demethylesterified by pectin methylesterases (PMEs, EC 3.1.1.11). PMEs activity on the status of pectin methylesterification profoundly affects the properties of pectin, and thereby is critical for plant development and plant defense response, although the roles of PMEs under heat stress (HS) are poorly understood. Functional genome annotation predicts that at least 66 potential PME genes are contained in Arabidopsis (Arabidopsis thaliana)...
April 5, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28377746/genome-guided-insights-into-the-plant-growth-promotion-capabilities-of-the-physiologically-versatile-bacillus-aryabhattai-strain-ab211
#20
Chandrima Bhattacharyya, Utpal Bakshi, Ivy Mallick, Shayantan Mukherji, Biswajit Bera, Abhrajyoti Ghosh
Bacillus aryabhattai AB211 is a plant growth promoting, Gram-positive firmicute, isolated from the rhizosphere of tea (Camellia sinensis), one of the oldest perennial crops and a major non-alcoholic beverage widely consumed all over the world. The whole genome of B. aryabhattai AB211 was sequenced, annotated and evaluated with special focus on genomic elements related to plant microbe interaction. It's genome sequence reveals the presence of a 5,403,026 bp chromosome. A total of 5226 putative protein-coding sequences, 16 rRNA, 120 tRNA, 8 ncRNAs, 58 non-protein coding genes, and 11 prophage regions were identified...
2017: Frontiers in Microbiology
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