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https://www.readbyqxmd.com/read/28649263/survey-of-high-throughput-rna-seq-data-reveals-potential-roles-for-lncrnas-during-development-and-stress-response-in-bread-wheat
#1
Shumayla, Shailesh Sharma, Mehak Taneja, Shivi Tyagi, Kashmir Singh, Santosh K Upadhyay
Long non-coding RNAs (lncRNAs) are a family of regulatory RNAs that play essential role in the various developmental processes and stress responses. Recent advances in sequencing technology and computational methods enabled identification and characterization of lncRNAs in certain plant species, but they are less known in Triticum aestivum (bread wheat). Herein, we analyzed 52 RNA seq data (>30 billion reads) and identified 44,698 lncRNAs in T. aestivum genome, which were characterized in comparison to the coding sequences (mRNAs)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28649260/tomato-udp-glucose-sterol-glycosyltransferases-a-family-of-developmental-and-stress-regulated-genes-that-encode-cytosolic-and-membrane-associated-forms-of-the-enzyme
#2
Karla Ramirez-Estrada, Nídia Castillo, Juan A Lara, Monserrat Arró, Albert Boronat, Albert Ferrer, Teresa Altabella
Sterol glycosyltransferases (SGTs) catalyze the glycosylation of the free hydroxyl group at C-3 position of sterols to produce sterol glycosides. Glycosylated sterols and free sterols are primarily located in cell membranes where in combination with other membrane-bound lipids play a key role in modulating their properties and functioning. In contrast to most plant species, those of the genus Solanum contain very high levels of glycosylated sterols, which in the case of tomato may account for more than 85% of the total sterol content...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28649255/overexpression-of-the-peat1-elicitor-gene-from-alternaria-tenuissima-improves-drought-tolerance-in-rice-plants-via-interaction-with-a-myo-inositol-oxygenase
#3
Fachao Shi, Yijie Dong, Yi Zhang, Xiufeng Yang, Dewen Qiu
Abiotic stresses, especially drought, seriously threaten cereal crops yields and quality. In this study, we observed that the rice plants of overexpression the Alternariatenuissima PeaT1 gene showed enhanced drought stress tolerance and increased the survival rate following a drought treatment. In PeaT1-overexpressing (PeaT1OE) plants, abscisic acid and chlorophyll content significantly increased, while the malondialdehyde (MDA) content decreased compared with the wild-type plants. Additionally, we confirmed that the transcript levels of drought-responsive genes, including OsAM1, OsLP2, and OsDST, were prominently lower in the PeaT1OE plants...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642773/infestation-of-broad-bean-vicia-faba-by-the-green-stink-bug-nezara-viridula-decreases-shoot-abscisic-acid-contents-under-well-watered-and-drought-conditions
#4
Luisa Ederli, Cecilia Brunetti, Mauro Centritto, Stefano Colazza, Francesca Frati, Francesco Loreto, Giovanni Marino, Gianandrea Salerno, Stefania Pasqualini
The response of broad bean (Vicia faba) plants to water stress alone and in combination with green stink bug (Nezara viridula) infestation was investigated through measurement of: (1) leaf gas exchange; (2) plant hormone titres of abscisic acid (ABA) and its metabolites, and of salicylic acid (SA); and (3) hydrogen peroxide (H2O2) content. Furthermore, we evaluated the effects of experimentally water-stressed broad-bean plants on N. viridula performance in terms of adult host-plant preference, and nymph growth and survival...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642770/interplay-between-carotenoids-abscisic-acid-and-jasmonate-guides-the-compatible-rice-meloidogyne-graminicola-interaction
#5
Tina Kyndt, Kamrun Nahar, Ashley Haeck, Ruben Verbeek, Kristof Demeestere, Godelieve Gheysen
In this study, we have characterized the role of carotenoids and chlorophyll in the compatible interaction between the sedentary root knot nematode (RKN) Meloidogyne graminicola and the monocot model plant rice (Oryza sativa). Previous transcriptome data showed a differential expression of carotenoid and chlorophyll biosynthesis genes in nematode-induced giant cells and gall tissue. Metabolite measurement showed that galls indeed accumulate chlorophyll a, b and carotenoids, as well as the hormone abscisic acid (ABA)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28642254/redox-regulation-of-a-guard-cellsnf1-relatedprotein-kinase-in-brassica-napus-%C3%A2-an-oilseed-crop
#6
Menmeng Zhu, Tong Zhang, Wei Ji, Cecilia Silva-Sanchez, Wenyuan Song, Sarah M Assmann, Alice C Harmon, Sixue Chen
Kinase-mediated phosphorylation is a pivotal regulatory process in stomatal responses to stresses. Through a redox proteomics study, a sucrose non-fermenting 1-related protein kinase (SnRK2.4) was identified to be redox regulated in Brassica napus guard cells upon abscisic acid (ABA) treatment. There are six genes encoding SnRK2.4 paralogs in B. napus Here we show that recombinant BnSnRK2.4-1C exhibited autophosphorylation activity and preferentially phosphorylated the N-terminal region of B. napus slow anion channel (BnSLAC1-NT) over generic substrates...
June 22, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28640834/overexpression-of-gmfdl19-enhances-tolerance-to-drought-and-salt-stresses-in-soybean
#7
Yuanyuan Li, Quanzhen Chen, Haiyang Nan, Xiaoming Li, Sijia Lu, Xiaohui Zhao, Baohui Liu, Changhong Guo, Fanjiang Kong, Dong Cao
The basic leucine zipper (bZIP) family of transcription factors plays an important role in the growth and developmental process as well as responds to various abiotic stresses, such as drought and high salinity. Our previous work identified GmFDL19, a bZIP transcription factor, as a flowering promoter in soybean, and the overexpression of GmFDL19 caused early flowering in transgenic soybean plants. Here, we report that GmFDL19 also enhances tolerance to drought and salt stress in soybean. GmFDL19 was determined to be a group A member, and its transcription expression was highly induced by abscisic acid (ABA), polyethylene glycol (PEG 6000) and high salt stresses...
2017: PloS One
https://www.readbyqxmd.com/read/28638398/discovery-of-putative-herbicide-resistance-genes-and-its-regulatory-network-in-chickpea-using-transcriptome-sequencing
#8
Mir A Iquebal, Khela R Soren, Priyanka Gangwar, P S Shanmugavadivel, K Aravind, Deepak Singla, Sarika Jaiswal, Rahul S Jasrotia, Sushil K Chaturvedi, Narendra P Singh, Rajeev K Varshney, Anil Rai, Dinesh Kumar
Background: Chickpea (Cicer arietinum L.) contributes 75% of total pulse production. Being cheaper than animal protein, makes it important in dietary requirement of developing countries. Weed not only competes with chickpea resulting into drastic yield reduction but also creates problem of harboring fungi, bacterial diseases and insect pests. Chemical approach having new herbicide discovery has constraint of limited lead molecule options, statutory regulations and environmental clearance. Through genetic approach, transgenic herbicide tolerant crop has given successful result but led to serious concern over ecological safety thus non-transgenic approach like marker assisted selection is desirable...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28638069/global-profiling-of-phytohormone-dynamics-during-combined-drought-and-pathogen-stress-in-arabidopsis-thaliana-reveals-aba-and-ja-as-major-regulators
#9
Aarti Gupta, Hiroshi Hisano, Yuko Hojo, Takakazu Matsuura, Yoko Ikeda, Izumi C Mori, Muthappa Senthil-Kumar
Global transcriptome studies demonstrated the existence of unique plant responses under combined stress which are otherwise not seen during individual stresses. In order to combat combined stress plants use signaling pathways and 'cross talk' mediated by hormones involved in stress and growth related processes. However, interactions among hormones' pathways in combined stressed plants are not yet known. Here we studied dynamics of different hormones under individual and combined drought and pathogen infection in Arabidopsis thaliana by liquid chromatography-mass spectrometry (LC-MS) based profiling...
June 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28637218/genome-wide-characterization-and-expression-analysis-enables-identification-of-abiotic-stress-responsive-myb-transcription-factors-in-cassava-manihot-esculenta
#10
Meng-Bin Ruan, Xin Guo, Bin Wang, Yi-Ling Yang, Wen-Qi Li, Xiao-Ling Yu, Peng Zhang, Ming Peng
The myeloblastosis (MYB) transcription factor superfamily is the largest transcription factor family in plants, playing different roles during stress response. However, abiotic stress-responsive MYB transcription factors have not been systematically studied in cassava (Manihot esculenta), an important tropical tuber root crop. In this study, we used a genome-wide transcriptome analysis to predict 299 putative MeMYB genes in the cassava genome. Under drought and cold stresses, many MeMYB genes exhibited different expression patterns in cassava leaves, indicating that these genes might play a role in abiotic stress responses...
June 20, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28636198/actin-filament-reorganisation-controlled-by-the-scar-wave-complex-mediates-stomatal-response-to-darkness
#11
Jean-Charles Isner, Zaoxu Xu, Joaquim Miguel Costa, Fabien Monnet, Thomas Batstone, Xiaobin Ou, Michael J Deeks, Bernard Genty, Kun Jiang, Alistair M Hetherington
Stomata respond to darkness by closing to prevent excessive water loss during the night. Although the reorganisation of actin filaments during stomatal closure is documented, the underlying mechanisms responsible for dark-induced cytoskeletal arrangement remain largely unknown. We used genetic, physiological and cell biological approaches to show that reorganisation of the actin cytoskeleton is required for dark-induced stomatal closure. The opal5 mutant does not close in response to darkness but exhibits wild-type (WT) behaviour when exposed to abscisic acid (ABA) or CaCl2 ...
June 21, 2017: New Phytologist
https://www.readbyqxmd.com/read/28634481/genome-wide-analysis-of-the-rav-family-in-soybean-and-functional-identification-of-gmrav-03-involvement-in-salt-and-drought-stresses-and-exogenous-aba-treatment
#12
Shu-Ping Zhao, Zhao-Shi Xu, Wei-Jun Zheng, Wan Zhao, Yan-Xia Wang, Tai-Fei Yu, Ming Chen, Yong-Bin Zhou, Dong-Hong Min, You-Zhi Ma, Shou-Cheng Chai, Xiao-Hong Zhang
Transcription factors play vital roles in plant growth and in plant responses to abiotic stresses. The RAV transcription factors contain a B3 DNA binding domain and/or an APETALA2 (AP2) DNA binding domain. Although genome-wide analyses of RAV family genes have been performed in several species, little is known about the family in soybean (Glycine max L.). In this study, a total of 13 RAV genes, named as GmRAVs, were identified in the soybean genome. We predicted and analyzed the amino acid compositions, phylogenetic relationships, and folding states of conserved domain sequences of soybean RAV transcription factors...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28633353/modulating-role-of-ros-in-re-establishing-desiccation-tolerance-in-germinating-seeds-of-caragana-korshinskii-kom
#13
Long Peng, Sirui Lang, Yu Wang, Hugh W Pritchard, Xiaofeng Wang
In close agreement with visible germination, orthodox seeds lose desiccation tolerance (DT). This trait can be regained under osmotic stress, but the mechanisms are poorly understood. In this study, germinating seeds of Caragana korshinskii Kom. were investigated, focusing on the potential modulating roles of reactive oxygen species (ROS) in the re-establishment of DT. Germinating seeds with 2 mm long radicles can be rendered tolerant to desiccation by incubation in a polyethylene glycol (PEG) solution (-1...
June 15, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28626890/transcriptomic-analysis-of-rice-aleurone-cells-identified-a-novel-abscisic-acid-response-element
#14
Kenneth A Watanabe, Arielle Homayouni, Lingkun Gu, Kuan-Ying Huang, Tuan-Hua David Ho, Qingxi J Shen
Seeds serve as a great model to study plant responses to drought stress, which is largely mediated by abscisic acid (ABA). The ABA responsive element (ABRE) is a key cis-regulatory element in ABA signaling. However, its consensus sequence, (ACGTG(G/T)C), is present in the promoters of only about 40% of ABA induced genes in rice aleurone cells, suggesting other ABREs may exist. To identify novel ABREs, RNA-sequencing was performed on aleurone cells of rice seeds treated with 20 μM ABA. Gibbs sampling was used to identify enriched elements and particle bombardment-mediated transient expression studies were performed to verify the function...
June 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28626614/identification-of-two-cigads-from-caragana-intermedia-and-their-transcriptional-responses-to-abiotic-stresses-and-exogenous-abscisic-acid
#15
Jing Ji, Lingyu Zheng, Jianyun Yue, Xiamei Yao, Ermei Chang, Tiantian Xie, Nan Deng, Lanzhen Chen, Yuwen Huang, Zeping Jiang, Shengqing Shi
BACKGROUND: Glutamate decarboxylase (GAD), as a key enzyme in the γ -aminobutyric acid (GABA) shunt, catalyzes the decarboxylation of L-glutamate to form GABA. This pathway has attracted much interest because of its roles in carbon and nitrogen metabolism, stress responses, and signaling in higher plants. The aim of this study was to isolate and characterize genes encoding GADs from Caragana intermedia, an important nitrogen-fixing leguminous shrub. METHODS: Two full-length cDNAs encoding GADs (designated as CiGAD1 and CiGAD2) were isolated and characterized...
2017: PeerJ
https://www.readbyqxmd.com/read/28622672/physiological-effects-of-single-and-multi-walled-carbon-nanotubes-on-rice-seedlings
#16
Hao Zhang, Mengxia Yue, Xueke Zheng, Chengshen Xie, Hong Zhou, Lijia Li
In this paper, single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) were found to accelerate leaf growth and development of rice seedlings at a low concentration (20 mg/L), accompanied with the increased chlorophyll content and net photosynthetic rate (PN). Quantitative real-time polymerase chain reaction (RT-PCR) results indicated that both SWCNTs and MWCNTs significantly increased expression of genes associated with chloroplast development and cell sizes. Further analysis revealed that the abscisic acid (ABA) content decreased and the gibberellin (GA) content increased while the content of O2 and H2O2 was slightly elevated and the activities of antioxidative enzymes (SOD, EC 1...
June 14, 2017: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28620951/persistent-negative-temperature-response-of-mesophyll-conductance-in-red-raspberry-rubus-idaeus-l-leaves-under-both-high-and-low-vapour-pressure-deficits-a-role-for-abscisic-acid
#17
Changpeng Qiu, Gilbert Ethier, Steeve Pepin, Pascal Dubé, Yves Desjardins, André Gosselin
The temperature dependence of mesophyll conductance (gm ) was measured in well-watered red raspberry (Rubus idaeus L.) plants acclimated to leaf-to-air vapour pressure deficit (VPDL) daytime differentials of contrasting amplitude, keeping a fixed diurnal leaf temperature (Tleaf ) rise from 20°C to 35°C. Contrary to the great majority of gm temperature responses published to date, we found a pronounced reduction of gm with increasing Tleaf irrespective of leaf chamber O2 level and diurnal VPDL regime. Leaf hydraulic conductance was greatly enhanced during the warmer afternoon periods under both low (0...
June 15, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28620915/gas-exchange-recovery-following-natural-drought-is-rapid-unless-limited-by-loss-of-leaf-hydraulic-conductance-evidence-from-an-evergreen-woodland
#18
Robert P Skelton, Timothy J Brodribb, Scott A M McAdam, Patrick J Mitchell
Drought can cause major damage to plant communities, but species damage thresholds and postdrought recovery of forest productivity are not yet predictable. We used an El Niño drought event as a natural experiment to test whether postdrought recovery of gas exchange could be predicted by properties of the water transport system, or if metabolism, primarily high abscisic acid concentration, might delay recovery. We monitored detailed physiological responses, including shoot sapflow, leaf gas exchange, leaf water potential and foliar abscisic acid (ABA), during drought and through the subsequent rehydration period for a sample of eight canopy and understory species...
June 16, 2017: New Phytologist
https://www.readbyqxmd.com/read/28617153/pectin-methylesterase-is-required-for-guard-cell-function-in-response-to-heat
#19
Hui-Chen Wu, Ya-Chen Huang, Lynne Stracovsky, Tsung-Luo Jinn
Pectin is an important cell wall polysaccharide required for cellular adhesion, extension, and plant growth. The pectic methylesterification status of guard cell walls influences the movement of stomata in response to different stimuli. Pectin methylesterase (PME) has a profound effect on cell wall modification, especially on the degree of pectic methylesterification during heat response. The Arabidopsis thaliana PME34 gene is highly expressed in guard cells and in response to the phytohormone abscisic acid...
June 15, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28616192/sex-specific-floral-morphology-biomass-and-phytohormones-associated-with-altitude-in-dioecious-populus-cathayana-populations
#20
Jundong He, Tingfa Dong, Kechao Huang, Yanxia Yang, Dadong Li, Xiao Xu, Xinhua He
Relationships between sex-specific floral traits and endogenous phytohormones associated with altitude are unknown particularly in dioecious trees. We thus examined the relationships between floral morphology or biomass and phytohormones in male and female flowers of dioecious Populus cathayana populations along an altitudinal gradient (1,500, 1,600, and 1,700 m above sea level) in the Xiaowutai Nature Reserve in northern China. The female and male flowers had the most stigma and pollen at 1,700 m, the largest ovaries and least pollen at 1,500 m, and the smallest ovaries and greater numbers of anthers at 1,600 m altitude...
June 2017: Ecology and Evolution
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