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https://www.readbyqxmd.com/read/28618117/itraq-based-proteomics-of-sunflower-cultivars-differing-in-resistance-to-parasitic-weed-orobanche-cumana
#1
Chong Yang, Ling Xu, Na Zhang, Faisal Islam, Wenjian Song, Luyang Hu, Dan Liu, Xiaonan Xie, Weijun Zhou
Orobanche cumana is an obligate root parasite causing severe damage to many economically important crops, including sunflowers worldwide. For efficient control measures, it is necessary to understand the resistant mechanism during interaction at molecular level. The present study emphasizes on comparative proteomics to investigate the mechanistic basis of compatible and incompatible interaction of O. cumana with resistant (JY207) and susceptible (TK0409) sunflowers. More than 3500 proteins were identified from two cultivars by iTRAQ analysis...
June 15, 2017: Proteomics
https://www.readbyqxmd.com/read/28600178/a-novel-ghbee1-like-gene-of-cotton-causes-anther-indehiscence-in-transgenic-arabidopsis-under-uncontrolled-transcription-level
#2
Eryong Chen, Xiaoqian Wang, Qian Gong, Hamama Islam Butt, Yanli Chen, Chaojun Zhang, Zuoren Yang, Zhixia Wu, Xiaoyang Ge, Xianlong Zhang, Fuguang Li, Xueyan Zhang
Male-sterile lines are very important for selective breeding, and anther dehiscence defect is an effective way to generate male-sterile lines. Although several bHLH-family proteins in Arabidopsis have been characterized, little is known about the role of bHLH-family proteins in cotton. Here, we isolated a novel bHLH protein from cotton (Gossypium hirsutum), named GhBEE1-Like. Protein domain analysis showed that GhBEE1-Like contained a basic domain and an HLH domain. Subcellular localization analysis revealed that GhBEE1-Like was a nuclear-localized protein...
June 6, 2017: Gene
https://www.readbyqxmd.com/read/28586421/fruitfull-controls-saur10-expression-and-regulates-arabidopsis-growth-and-architecture
#3
Marian Bemer, Hilda van Mourik, Jose M Muiño, Cristina Ferrándiz, Kerstin Kaufmann, Gerco C Angenent
MADS-domain transcription factors are well known for their roles in plant development and regulate sets of downstream genes that have been uncovered by high-throughput analyses. A considerable number of these targets are predicted to function in hormone responses or responses to environmental stimuli, suggesting that there is a close link between developmental and environmental regulators of plant growth and development. Here, we show that the Arabidopsis MADS-domain factor FRUITFULL (FUL) executes several functions in addition to its noted role in fruit development...
June 6, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28584713/transcriptome-analysis-reveals-the-regulation-of-brassinosteroids-on-petal-growth-in-gerbera-hybrida
#4
Gan Huang, Meixiang Han, Wei Yao, Yaqin Wang
Gerbera hybrida is a cut-flower crop of global importance, and an understanding of the mechanisms underlying petal development is vital for the continued commercial development of this plant species. Brassinosteroids (BRs), a class of phytohormones, are known to play a major role in cell expansion, but their effect on petal growth in G. hybrida is largely unexplored. In this study, we found that the brassinolide (BL), the most active BR, promotes petal growth by lengthening cells in the middle and basal regions of petals, and that this effect on petal growth was greater than that of gibberellin (GA)...
2017: PeerJ
https://www.readbyqxmd.com/read/28576847/arabidopsis-wrky46-wrky54-and-wrky70-transcription-factors-are-involved-in-brassinosteroid-regulated-plant-growth-and-drought-response
#5
Jiani Chen, Trevor Nolan, Huaxun Ye, Mingcai Zhang, Hongning Tong, Peiyong Xin, Jinfang Chu, Chengcai Chu, Zhaohu Li, Yanhai Yin
Plant steroid hormones, brassinosteroids (BRs), play important roles in growth and development. BR signaling controls the activities of BRASSINOSTERIOD INSENSITIVE1-EMS-SUPPRESSOR 1/ BRASSINAZOLE-RESISTANT 1 (BES1/BZR1) family transcription factors. Besides the role in promoting growth, BRs are also implicated in plant responses to drought stress. However, the molecular mechanisms by which BRs regulate drought response have just begun to be revealed. However, the functions of WRKY transcription factors in BR-regulated plant growth have not been established, although their roles in stress responses are well documented...
June 2, 2017: Plant Cell
https://www.readbyqxmd.com/read/28575660/the-f-box-protein-kib1-mediates-brassinosteroid-induced-inactivation-and-degradation-of-gsk3-like-kinases-in-arabidopsis
#6
Jia-Ying Zhu, Yuyao Li, Dong-Mei Cao, Hongjuan Yang, Eunkyoo Oh, Yang Bi, Shengwei Zhu, Zhi-Yong Wang
The glycogen synthase kinase-3 (GSK3) family kinases are central cellular regulators highly conserved in all eukaryotes. In Arabidopsis, the GSK3-like kinase BIN2 phosphorylates a range of proteins to control broad developmental processes, and BIN2 is degraded through unknown mechanism upon receptor kinase-mediated brassinosteroid (BR) signaling. Here we identify KIB1 as an F-box E3 ubiquitin ligase that promotes the degradation of BIN2 while blocking its substrate access. Loss-of-function mutations of KIB1 and its homologs abolished BR-induced BIN2 degradation and caused severe BR-insensitive phenotypes...
June 1, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28567047/brassinosteroid-mediated-cell-wall-remodeling-in-grasses-under-abiotic-stress
#7
REVIEW
Xiaolan Rao, Richard A Dixon
Unlike animals, plants, being sessile, cannot escape from exposure to severe abiotic stresses such as extreme temperature and water deficit. The dynamic structure of plant cell wall enables them to undergo compensatory changes, as well as maintain physical strength, with changing environments. Plant hormones known as brassinosteroids (BRs) play a key role in determining cell wall expansion during stress responses. Cell wall deposition differs between grasses (Poaceae) and dicots. Grass species include many important food, fiber, and biofuel crops...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28559475/interplay-of-plasma-membrane-and-vacuolar-ion-channels-together-with-bak1-elicits-rapid-cytosolic-calcium-elevations-in-arabidopsis-during-aphid-feeding
#8
Thomas R Vincent, Marieta Avramova, James Canham, Peter Higgins, Natasha Bilkey, Sam T Mugford, Marco Pitino, Masatsugu Toyota, Simon Gilroy, Tony J Miller, Saskia Hogenhout, Dale Sanders
A transient rise in cytosolic calcium ion concentration is one of the main signals used by plants in perception of their environment. The role of calcium in the detection of abiotic stress is well documented; however, its role during biotic interactions remains unclear. Here, we use a fluorescent calcium biosensor (GCaMP3) in combination with the green peach aphid (Myzus persicae) as a tool to study Arabidopsis thaliana calcium dynamics in vivo and in real time during a live biotic interaction. We demonstrate rapid and highly-localised plant calcium elevations around the feeding sites of M...
May 30, 2017: Plant Cell
https://www.readbyqxmd.com/read/28545052/brl3-and-atrgs1-cooperate-to-fine-tune-growth-inhibition-and-ros-activation
#9
Meral Tunc-Ozdemir, Alan M Jones
Plasma membrane-localized leucine-rich repeat receptor-like kinases directly activates G protein complex via interaction with seven transmembrane domain Regulator of G-protein Signaling 1 (AtRGS1) protein. Brassinosteroid insensitive 1 (BRI1) LIKE3 (BRL3) phosphorylates AtRGS1 in vitro. FRET analysis showed that BRL3 and AtRGS1 interaction dynamics change in response to glucose and flg22. Both BRL3 and AtRGS1 function in glucose sensing and brl3 and rgs1-2 single mutants are hyposensitive to high glucose as well as the brl3/rgs1 double mutant...
2017: PloS One
https://www.readbyqxmd.com/read/28540949/structure-based-in-silico-identification-of-potentially-non-steroidal-brassinosteroids-mimics
#10
Beilei Lei, Ningjuan Heng, Xiaoxue Dang, Jiyuan Liu, Xiaojun Yao, Cunli Zhang
Brassinosteroids (BRs) are a class of plant steroid hormones that play indispensable roles in cell elongation, division and plant development. To date, the numerous synthesis of BRs analogs and structure-activity relationship investigations have clearly revealed the key substituent groups relevant to the steroidal activity of BRs. However, due to the limited chemical space studied, the efforts for alternative non-steroidal compounds have produced no remarkable results. To identify potentially non-steroidal BR mimics in this study, vital interacting pharmacophore features were extracted starting from several complex structures of BRs that bound with the receptor Brassinosteroid-Insentive 1 (BRI1) and co-receptor BRI1-associated kinase 1 (BAK1), which were characterized and merged into one comprehensive pharmacophore model...
May 25, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28540554/understanding-brassinosteroid-regulated-mechanisms-to-improve-stress-tolerance-in-plants-a-critical-review
#11
Fahim Nawaz, Muhammad Naeem, Bilal Zulfiqar, Asim Akram, Muhammad Yasin Ashraf, Muhammad Raheel, Rana Nauman Shabbir, Rai Altaf Hussain, Irfan Anwar, Muhammad Aurangzaib
Brassinosteroids (BRs) are steroidal plant hormones involved in regulation of physiological and molecular processes to ameliorate various biotic and abiotic stresses. Exogenous application of BRs to improve stress tolerance in plants has recently become a high research priority. Several studies have revealed the involvement of these steroidal hormones in upregulation of stress-related defense genes and their cross talk with other metabolic pathways. This is likely to stimulate research on many unanswered questions regarding their role in enhancing the ability of plants to tolerate adverse environmental conditions...
May 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28516384/a-mutant-in-the-csdet2-gene-leads-to-a-systemic-brassinosteriod-deficiency-and-super-compact-phenotype-in-cucumber-cucumis-sativus-l
#12
Shanshan Hou, Huanhuan Niu, Qianyi Tao, Shenhao Wang, Zhenhui Gong, Sen Li, Yiqun Weng, Zheng Li
A novel dwarf cucumber mutant, scp-2, displays a typical BR biosynthesis-deficient phenotype, which is due to a mutation in CsDET2 for a steroid 5-alpha-reductase. Brassinosteroids (BRs) are a group of plant hormones that play important roles in the development of plant architecture, and extreme dwarfism is a typical outcome of BR-deficiency. Most cucumber (Cucumis sativus L.) varieties have an indeterminate growth habit, and dwarfism may have its value in manipulation of plant architecture and improve production in certain production systems...
May 17, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28507175/a-mutation-in-the-bhlh-domain-of-the-spch-transcription-factor-uncovers-a-br-dependent-mechanism-for-stomatal-development
#13
Alberto de Marcos, Anaxi Houbaert, Magdalena Triviño, Dolores Delgado, Mar Martín-Trillo, Eugenia Russinova, Carmen Fenoll, Montaña Mena
The asymmetric cell divisions necessary for stomatal lineage initiation and progression in Arabidopsis (Arabidopsis thaliana) require the function of the basic helix-loop-helix (bHLH) transcription factor SPEECHLESS (SPCH). Mutants lacking SPCH do not produce stomata or lineages. Here, we isolated a new spch-5 allele carrying a point mutation in the bHLH domain that displayed normal growth, but had an extremely low number of sometimes clustered stomata in the leaves, whereas the hypocotyls did not have any stomata...
June 2017: Plant Physiology
https://www.readbyqxmd.com/read/28507137/arabidopsis-glycosylphosphatidylinositol-anchored-protein-llg1-associates-with-and-modulates-fls2-to-regulate-innate-immunity
#14
Qiujing Shen, Gildas Bourdais, Huairong Pan, Silke Robatzek, Dingzhong Tang
Plants detect and respond to pathogen invasion with membrane-localized pattern recognition receptors (PRRs), which recognize pathogen-associated molecular patterns (PAMPs) and activate downstream immune responses. Here we report that Arabidopsis thaliana LORELEI-LIKE GPI-ANCHORED PROTEIN 1 (LLG1), a coreceptor of the receptor-like kinase FERONIA, regulates PRR signaling. In a forward genetic screen for suppressors of enhanced disease resistance 1 (edr1), we identified the point mutation llg1-3, which suppresses edr1 disease resistance but does not affect plant growth and development...
May 30, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28502860/structure-activity-relationship-of-brassinosteroids-and-their-agricultural-practical-usages
#15
REVIEW
Jinna Liu, Di Zhang, Xiaoyu Sun, Tingle Ding, Beilei Lei, Cunli Zhang
Brassinosteroids (BRs) control several important agronomic traits, such as strengthening resistance to diverse adversity, improving the quality, and increasing crop yield. Their chemical structures and varieties, specific methods for the evaluation of bioactivities, structure-activity relationships, potential novel compounds, and practical agricultural uses were summarized. The findings allow the examination of brassinosteroids in two important issues: 1) Do the results of different bioevaluation protocols provide similar activities for BRs? and 2) which bioevaluated compounds would proof to have a greater potential for application in agricultural usages?...
May 11, 2017: Steroids
https://www.readbyqxmd.com/read/28501193/immunoaffinity-chromatography-combined-with-tandem-mass-spectrometry-a-new-tool-for-the-selective-capture-and-analysis-of-brassinosteroid-plant-hormones
#16
Jana Oklestkova, Danuše Tarkowská, Luděk Eyer, Tomáš Elbert, Aleš Marek, Zora Smržová, Ondřej Novák, Milan Fránek, Vladimir N Zhabinskii, Miroslav Strnad
Brassinosteroids (BRs) are plant-specific steroid hormones that play essential roles in the regulation of many important physiological processes in plant life. Their extremely low concentrations (~pmoles/g FW) in plant tissue and huge differences in polarity of individual members within the BR family hamper their detection and quantification. To address this problem, an immunoaffinity sorbent with broad specificity and high capacity for different BR metabolites containing a monoclonal antibody (mAb) against a BR spacer (20S)-2α,3α-dihydroxy-7-oxa-7α-homo-5α-pregnane-6-one-20 carboxylic acid (BR4812) was used for the rapid and highly selective isolation of endogenous BRs containing a 2α,3α-diol in ring A from minute plant samples...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28500704/meta-analysis-of-the-transcriptome-reveals-a-core-set-of-shade-avoidance-genes-in-arabidopsis
#17
Romina Sellaro, Manuel Pacín, Jorge J Casal
The presence of neighboring vegetation modifies the light input perceived by photo-sensory receptors, initiating a signaling cascade that adjusts plant growth and physiology. Thousands of genes can change their expression during this process, but the structure of the transcriptional circuit is poorly understood. Here we present a meta-analysis of transcriptome data from Arabidopsis thaliana exposed to neighbor signals in different contexts, including organs where growth is promoted or inhibited by these signals...
May 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28500288/light-perception-in-aerial-tissues-enhances-dwf4-accumulation-in-root-tips-and-induces-root-growth
#18
Jun Sakaguchi, Yuichiro Watanabe
Many attempts have been made to characterize the activities of brassinosteroids (BRs), which are important plant hormones. The crosstalk between light perception and the BR signalling pathway has been extensively studied regarding its effects on photomorphogenesis, especially in elongating etiolated hypocotyls. In contrast, how and where the light induces BR biosynthesis remain uncharacterized. DWF4 is one of the main enzymes involved in the BR biosynthesis pathway in Arabidopsis thaliana. We established DWF4-GUS A...
May 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28497809/receptor-like-protein-elt1-promotes-brassinosteroid-signaling-through-interacting-with-and-suppressing-the-endocytosis-mediated-degradation-of-receptor-bri1
#19
Bao-Jun Yang, Wen-Hui Lin, Fang-Fang Fu, Zhi-Hong Xu, Hong-Wei Xue
No abstract text is available yet for this article.
May 12, 2017: Cell Research
https://www.readbyqxmd.com/read/28487714/both-light-induced-sa-accumulation-and-eti-mediators-contribute-to-the-cell-death-regulated-by-bak1-and-bkk1
#20
Yang Gao, Yujun Wu, Junbo Du, Yanyan Zhan, Doudou Sun, Jianxin Zhao, Shasha Zhang, Jia Li, Kai He
Receptor-like kinases BAK1 and BKK1 modulate multiple cellular processes including brassinosteroid signaling and PRR-mediated PTI in Arabidopsis. Our previous reports also demonstrated that bak1 bkk1 double mutants exhibit a spontaneous cell death phenotype under normal growth condition. With an unknown mechanism, the cell death in bak1 bkk1 is significantly suppressed when grown in dark but can be quickly induced by light. Furthermore, little is known about intrinsic components involved in BAK1 and BKK1-regulated cell death pathway...
2017: Frontiers in Plant Science
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