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https://www.readbyqxmd.com/read/28428794/fine-mapping-of-a-novel-defective-glume-1-dg1-mutant-which-affects-vegetative-and-spikelet-development-in-rice
#1
Haiping Yu, Banpu Ruan, Zhongwei Wang, Deyong Ren, Yu Zhang, Yujia Leng, Dali Zeng, Jiang Hu, Guangheng Zhang, Li Zhu, Zhenyu Gao, Guang Chen, Longbiao Guo, Wenfu Chen, Qian Qian
In cereal crops, vegetative and spikelet development play important roles in grain yield and quality, but the genetic mechanisms that control vegetative and spikelet development remain poorly understood in rice. Here, we identified a new rice mutant, defective glume 1 (dg1) mutant from cultivar Zhonghua11 after ethyl methanesulfonate treatment. The dg1 mutant displayed the dwarfism with small, rolled leaves, which resulted from smaller cells and more bulliform cells. The dg1 mutant also had an enlarged leaf angle and defects in brassinosteroid signaling...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28407091/brassinosteroid-involvement-in-arabidopsis-thaliana-stomatal-opening
#2
Shin-Ichiro Inoue, Nozomi Iwashita, Yohei Takahashi, Eiji Gotoh, Eiji Okuma, Maki Hayashi, Ryohei Tabata, Atsushi Takemiya, Yoshiyuki Murata, Michio Doi, Toshinori Kinoshita, Ken-Ichiro Shimazaki
Stomata within the plant epidermis regulate CO2 uptake for photosynthesis and water loss through transpiration. Stomatal opening in Arabidopsis thaliana is determined by various factors, including blue light as a signal and multiple phytohormones. Plasma membrane transporters, including H+-ATPase, K+ channels, and anion channels in guard cells mediate these processes, and the activities and expression levels of these components determine stomatal aperture. However, the regulatory mechanisms involved in these processes are not fully understood...
April 12, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28406933/transcriptomic-profiling-of-taproot-growth-and-sucrose-accumulation-in-sugar-beet-beta-vulgaris-l-at-different-developmental-stages
#3
Yong-Feng Zhang, Guo-Long Li, Xue-Feng Wang, Ya-Qing Sun, Shao-Ying Zhang
In sugar beet (Beta vulgaris L.), taproot weight and sucrose content are the important determinants of yield and quality. However, high yield and low sucrose content are two tightly bound agronomic traits. The advances in next-generation sequencing technology and the publication of sugar beet genome have provided a method for the study of molecular mechanism underlying the regulation of these two agronomic traits. In this work, we performed comparative transcriptomic analyses in the high taproot yield cultivar SD13829 and the high sucrose content cultivar BS02 at five developmental stages...
2017: PloS One
https://www.readbyqxmd.com/read/28402719/ospra2-fine-tunes-rice-brassinosteroid-receptor
#4
Xiaoguang Song, Hongyan Guo, Ge Zhang, Yao Wu, Guiling Wang, Xiaoying Chen, Rongxiang Fang
Brassinosteroids (BRs) are a kind of plant hormones that regulate many important agronomic traits. Although the framework of the BR signaling pathway has been outlined, detailed working mechanisms at several steps of this pathway, especially at the BR receptor level, need to be further elucidated. Recently we have reported that a rice small G protein, OsPRA2, bound to the BR receptor OsBRI1 at the plasma membrane (PM) and inhibited its kinase activity and its interaction with the co-receptor OsBAK1, leading to a lower sensitivity to BR treatment and dephosphorylation of OsBZR1...
March 4, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28399399/sinat-e3-ligases-control-the-light-mediated-stability-of-the-brassinosteroid-activated-transcription-factor-bes1-in-arabidopsis
#5
Mengran Yang, Chengxiang Li, Zhenying Cai, Yinmeng Hu, Trevor Nolan, Feifei Yu, Yanhai Yin, Qi Xie, Guiliang Tang, Xuelu Wang
The plant hormones brassinosteroids (BRs) participate in light-mediated regulation of plant growth, although the underlying mechanisms are far from being fully understood. In addition, the function of the core transcription factor in the BR signaling pathway, BRI1-EMS-SUPPRESSOR 1 (BES1), largely depends on its phosphorylation status and its protein stability, but the regulation of BES1 is not well understood. Here, we report that SINA of Arabidopsis thaliana (SINATs) specifically interact with dephosphorylated BES1 and mediate its ubiquitination and degradation...
April 10, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28399398/selective-autophagy-of-bes1-mediated-by-dsk2-balances-plant-growth-and-survival
#6
Trevor M Nolan, Benjamin Brennan, Mengran Yang, Jiani Chen, Mingcai Zhang, Zhaohu Li, Xuelu Wang, Diane C Bassham, Justin Walley, Yanhai Yin
Plants encounter a variety of stresses and must fine-tune their growth and stress-response programs to best suit their environment. BES1 functions as a master regulator in the brassinosteroid (BR) pathway that promotes plant growth. Here, we show that BES1 interacts with the ubiquitin receptor protein DSK2 and is targeted to the autophagy pathway during stress via the interaction of DSK2 with ATG8, a ubiquitin-like protein directing autophagosome formation and cargo recruitment. Additionally, DSK2 is phosphorylated by the GSK3-like kinase BIN2, a negative regulator in the BR pathway...
April 10, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28399194/interactions-between-plant-hormones-and-heavy-metals-responses
#7
Lauro Bücker-Neto, Ana Luiza Sobral Paiva, Ronei Dorneles Machado, Rafael Augusto Arenhart, Marcia Margis-Pinheiro
Heavy metals are natural non-biodegradable constituents of the Earth's crust that accumulate and persist indefinitely in the ecosystem as a result of human activities. Since the industrial revolution, the concentration of cadmium, arsenic, lead, mercury and zinc, amongst others, have increasingly contaminated soil and water resources, leading to significant yield losses in plants. These issues have become an important concern of scientific interest. Understanding the molecular and physiological responses of plants to heavy metal stress is critical in order to maximize their productivity...
April 10, 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28396515/light-involved-regulation-of-bzr1-stability-andphosphorylation-statusto-coordinate-plant-growth-in-arabidopsis
#8
Qian-Feng Li, Li-Chun Huang, Ke Wei, Jia-Wen Yu, Chang-Quan Zhang, Qiao-Quan Liu
Light and Brassinosteroid (BR) are master environmental stimulus and endogenous cue for plant growth and development, respectively. Great progress has been made in elucidating the molecular mechanisms on the crosstalk between light and BR. However, little is known about how BZR1, the pivotal integration node, is regulated by light and dark. Here, we demonstrated that an intact BR signaling pathway is essential for dark-induced hypocotyl elongation. Consequent expression assay showed that light-dark switch affected BZR1 phosphorylation and accumulation...
April 10, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28394310/gw5-acts-in-the-brassinosteroid-signalling-pathway-to-regulate-grain-width-and-weight-in-rice
#9
Jiafan Liu, Jun Chen, Xiaoming Zheng, Fuqing Wu, Qibing Lin, Yueqin Heng, Peng Tian, ZhiJun Cheng, Xiaowen Yu, Kunneng Zhou, Xin Zhang, Xiuping Guo, Jiulin Wang, Haiyang Wang, Jianmin Wan
Grain size is a major determinant of grain yield in cereal crops. qSW5/GW5, which exerts the greatest effect on rice grain width and weight, was fine-mapped to a 2,263-bp/21-kb genomic region containing a 1,212-bp deletion, respectively. Here, we show that a gene encoding a calmodulin binding protein, located ∼5 kb downstream of the 1,212-bp deletion, corresponds to qSW5/GW5. GW5 is expressed in various rice organs, with highest expression level detected in young panicles. We provide evidence that the 1,212-bp deletion affects grain width most likely through influencing the expression levels of GW5...
April 10, 2017: Nature Plants
https://www.readbyqxmd.com/read/28386988/a-new-proteinaceous-pathogen-associated-molecular-pattern-pamp-identified-in-ascomycete-fungi-induces-cell-death-in-solanaceae
#10
Barbara Franco-Orozco, Adokiye Berepiki, Olaya Ruiz, Louise Gamble, Lucie L Griffe, Shumei Wang, Paul R J Birch, Kostya Kanyuka, Anna Avrova
Pathogen-associated molecular patterns (PAMPs) are detected by plant pattern recognition receptors (PRRs), which gives rise to PAMP-triggered immunity (PTI). We characterized a novel fungal PAMP, Cell Death Inducing 1 (RcCDI1), identified in the Rhynchosporium commune transcriptome sampled at an early stage of barley (Hordeum vulgare) infection. The ability of RcCDI1 and its homologues from different fungal species to induce cell death in Nicotiana benthamiana was tested following agroinfiltration or infiltration of recombinant proteins produced by Pichia pastoris...
April 7, 2017: New Phytologist
https://www.readbyqxmd.com/read/28370079/brassinosteroids-act-as-a-positive-regulator-for-resistance-against-root-knot-nematode-involving-respiratory-burst-oxidase-homolog-dependent-activation-of-mapks-in-tomato
#11
Liu-Xia Song, Xue-Chen Xu, Fa-Nan Wang, Yu Wang, Xiao-Jian Xia, Kai Shi, Yan-Hong Zhou, Jie Zhou, Jing-Quan Yu
Interplay of hormones with reactive oxygen species (ROS) fine-tunes the response of plants to stress, however, the crosstalk between brassinosteroids (BRs) and ROS in nematode resistance is unclear. In this study, we found that low BR biosynthesis or lack of BR receptor increased whilst exogenous BR decreased the susceptibility of tomato plants to Meloidogyne incognita. Hormone quantification coupled with hormone mutant complementation experiments revealed that BR did not induce the defense response by triggering salicylic acid (SA), jasmonic acid/ethylene (JA/ET) or abscisic acid (ABA) signaling pathway...
March 29, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28369122/molecular-actions-of-two-synthetic-brassinosteroids-iso-carbabl-and-6-deoxobl-which-cause-altered-physiological-activities-between-arabidopsis-and-rice
#12
Ayako Nakamura, Naoya Tochio, Shozo Fujioka, Shinsaku Ito, Takanori Kigawa, Yukihisa Shimada, Makoto Matsuoka, Shigeo Yoshida, Toshinori Kinoshita, Tadao Asami, Hideharu Seto, Takeshi Nakano
Brassinosteroid (BR) is an important plant hormone that is perceived by the BRASSINOSTEROID INSENSITIVE 1 (BRI1) receptor. BRI1 is conserved among dicot and monocot species; however, the molecular mechanism underlying BR perception in monocots is not fully understood. We synthesised two BRs, iso-carbabrassinolide (iso-carbaBL) and 6-deoxoBL, which have different BR activities in Arabidopsis thaliana (Arabidopsis) and rice. Our bioassay indicated that iso-carbaBL has relatively strong BR activity in Arabidopsis, but is inactive in rice and competitively inhibits BR activity...
2017: PloS One
https://www.readbyqxmd.com/read/28357791/role-of-brassinosteroids-in-alleviating-toxin-induced-stress-of-verticillium-dahliae-on-cotton-callus-growth
#13
Noreen Bibi, Imrul Mosaddek Ahmed, Kai Fan, Muhammad Dawood, Feng Li, Shuna Yuan, Xuede Wang
Brassinosteroids are well known to mitigate biotic stresses; however, their role to induce tolerance against Verticillium dahliae is unknown. The current study employed V. dahliae (Vd) toxin as pathogen-free model system to induce stress on cotton callus growth, and its amelioration was investigated using 24-epibrassinolide (EBR). Results revealed that EBR has ameliorative effects against Vd toxin with greater seen effect when callus was treated with EBR prior to its exposure to Vd toxin (pre-EBR treatment) than EBR applied along with Vd toxin simultaneously (co-EBR treatment)...
March 29, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28349986/spatial-transcriptome-analysis-provides-insights-of-key-gene-s-involved-in-steroidal-saponin-biosynthesis-in-medicinally-important-herb-trillium-govanianum
#14
Pradeep Singh, Gagandeep Singh, Abhishek Bhandawat, Gopal Singh, Rajni Parmar, Romit Seth, Ram Kumar Sharma
Trillium govanianum, an endangered medicinal herb native to the Himalaya, is less studied at the molecular level due to the non-availability of genomic resources. To facilitate the basic understanding of the key genes and regulatory mechanism of pharmaceutically important biosynthesis pathways, first spatial transcriptome sequencing of T. govanianum was performed. 151,622,376 (~11.5 Gb) high quality reads obtained using paired-end Illumina sequencing were de novo assembled into 69,174 transcripts. Functional annotation with multiple public databases identified array of genes involved in steroidal saponin biosynthesis and other secondary metabolite pathways including brassinosteroid, carotenoid, diterpenoid, flavonoid, phenylpropanoid, steroid and terpenoid backbone biosynthesis, and important TF families (bHLH, MYB related, NAC, FAR1, bZIP, B3 and WRKY)...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28328971/mapping-the-n-linked-glycosites-of-rice-oryza-sativa-l-germinating-embryos
#15
Jiezheng Ying, Juan Zhao, Yuxuan Hou, Yifeng Wang, Jiehua Qiu, Zhiyong Li, Xiaohong Tong, Zhaomei Shi, Jun Zhu, Jian Zhang
Germination is a key event in the angiosperm life cycle. N-glycosylation of proteins is one of the most common post-translational modifications, and has been recognized to be an important regulator of the proteome of the germinating embryo. Here, we report the first N-linked glycosites mapping of rice embryos during germination by using a hydrophilic interaction chromatography (HILIC) glycopeptides enrichment strategy associated with high accuracy mass spectrometry identification. A total of 242 glycosites from 191 unique proteins was discovered...
2017: PloS One
https://www.readbyqxmd.com/read/28326087/arabidopsis-nac-transcription-factor-jungbrunnen1-exerts-conserved-control-over-gibberellin-and-brassinosteroid-metabolism-and-signaling-genes-in-tomato
#16
Sara Shahnejat-Bushehri, Annapurna D Allu, Nikolay Mehterov, Venkatesh P Thirumalaikumar, Saleh Alseekh, Alisdair R Fernie, Bernd Mueller-Roeber, Salma Balazadeh
The Arabidopsis thaliana NAC transcription factor JUNGBRUNNEN1 (AtJUB1) regulates growth by directly repressing GA3ox1 and DWF4, two key genes involved in gibberellin (GA) and brassinosteroid (BR) biosynthesis, respectively, leading to GA and BR deficiency phenotypes. AtJUB1 also reduces the expression of PIF4, a bHLH transcription factor that positively controls cell elongation, while it stimulates the expression of DELLA genes, which are important repressors of growth. Here, we extend our previous findings by demonstrating that AtJUB1 induces similar GA and BR deficiency phenotypes and changes in gene expression when overexpressed in tomato (Solanum lycopersicum)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28320734/topless-mediates-brassinosteroid-control-of-shoot-boundaries-and-root-meristem-development-in-arabidopsis-thaliana
#17
Ana Espinosa-Ruiz, Cristina Martínez, Miguel de Lucas, Norma Fàbregas, Nadja Bosch, Ana I Caño-Delgado, Salomé Prat
The transcription factor bri1-EMS-SUPRESSOR1 (BES1) is a master regulator of brassinosteroid (BR)-regulated gene expression. BES1 together with BRASSINAZOLE-RESISTANT1 (BZR1) drive activated or repressed expression of several genes, and have a prominent role in negative regulation of BR synthesis. Here, we report that BES1 interaction with TOPLESS (TPL), via its ERF-associated amphiphilic repression EAR motif, is essential for BES1-mediated control of organ boundary formation in the SAM and the regulation of the quiescent center (QC) cell division in roots...
March 20, 2017: Development
https://www.readbyqxmd.com/read/28314933/major-genes-determining-yield-related-traits-in-wheat-and-barley
#18
REVIEW
Anna Nadolska-Orczyk, Izabela K Rajchel, Wacław Orczyk, Sebastian Gasparis
Current development of advanced biotechnology tools allows us to characterize the role of key genes in plant productivity. The implementation of this knowledge in breeding strategies might accelerate the progress in obtaining high-yielding cultivars. The achievements of the Green Revolution were based on a specific plant ideotype, determined by a single gene involved in gibberellin signaling or metabolism. Compared with the 1950s, an enormous increase in our knowledge about the biological basis of plant productivity has opened new avenues for novel breeding strategies...
March 17, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28314132/rhizobial-symbiosis-alleviates-polychlorinated-biphenyls-induced-systematic-oxidative-stress-via-brassinosteroids-signaling-in-alfalfa
#19
Xiaomi Wang, Ying Teng, Ning Zhang, Peter Christie, Zhengao Li, Yongming Luo, Jun Wang
The role of symbiotic rhizobia in the alleviation of polychlorinated biphenyl (PCB)-induced phytotoxicity in alfalfa and the brassinosteroid (BR) hormone signaling involved were investigated during phytoremediation. The association between alfalfa and Sinorhizobium meliloti was adopted as a remediation model. Phytotoxicity due to PCB 77 (3,3',4,4'-tetrachlorobiphenyl) exerted adverse impacts on plant performance (biomass accumulation and photosynthesis) and elicited cellular oxidative stress (overproduction of reactive oxygen species, lipid peroxidation, and cell necrosis) which was largely attenuated by pre-inoculation with S...
March 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28303144/the-cytochrome-p450-gene-cscyp85a1-is-a-putative-candidate-for-super-compact-1-scp-1-plant-architecture-mutation-in-cucumber-cucumis-sativus-l
#20
Hui Wang, Wanqing Li, Yaguang Qin, Yupeng Pan, Xiaofeng Wang, Yiqun Weng, Peng Chen, Yuhong Li
The dwarf or compact plant architecture is an important trait in plant breeding. A number of genes controlling plant height have been cloned and functionally characterized which often involve in biosynthesis or signaling of plant hormones such as brassinosteroids (BRs). No genes for plant height or vine length have been cloned in cucurbit crops (family Cucurbitaceae). From an EMS-induced mutagenesis population, we identified a super compact (SCP) mutant C257 which was extremely dwarf due to practically no internode elongation...
2017: Frontiers in Plant Science
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