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https://www.readbyqxmd.com/read/28720789/evolutionarily-conserved-bil4-suppresses-the-degradation-of-brassinosteroid-receptor-bri1-and-regulates-cell-elongation
#1
Ayumi Yamagami, Chieko Saito, Miki Nakazawa, Shozo Fujioka, Tomohiro Uemura, Minami Matsui, Masaaki Sakuta, Kazuo Shinozaki, Hiroyuki Osada, Akihiko Nakano, Tadao Asami, Takeshi Nakano
Brassinosteroids (BRs), plant steroid hormones, play important roles in plant cell elongation and differentiation. To investigate the mechanisms of BR signaling, we previously used the BR biosynthesis inhibitor Brz as a chemical biology tool and identified the Brz-insensitive-long hypocotyl4 mutant (bil4). Although the BIL4 gene encodes a seven-transmembrane-domain protein that is evolutionarily conserved in plants and animals, the molecular function of BIL4 in BR signaling has not been elucidated. Here, we demonstrate that BIL4 is expressed in early elongating cells and regulates cell elongation in Arabidopsis...
July 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28718794/brs1-function-in-facilitating-lateral-root-emergence-in-arabidopsis
#2
Qian Deng, Xue Wang, Dongzhi Zhang, Xiaoming Wang, Cuizhu Feng, Shengbao Xu
The BRS1 (BRI1 Suppressor 1) gene encodes a serine carboxypeptidase that plays a critical role in the brassinosteroid signaling pathway. However, its specific biological function remains unclear. In this study, the developmental role of BRS1 was investigated in Arabidopsis thaliana. We found that overexpressing BRS1 resulted in significantly more lateral roots in different Arabidopsis ecotypes (WS2 and Col-0) and in brassinosteroid mutants (bri1-5 and det2-28). Further research showed that BRS1 facilitates the process whereby lateral root primordia break through the endodermis, cortex, and epidermis...
July 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28701886/overexpression-of-ginseng-ugt72al1-causes-organ-fusion-in-the-axillary-leaf-branch-of-arabidopsis
#3
Ngoc Quy Nguyen, Ok Ran Lee
BACKGROUND: Glycosylation of natural compounds increases the diversity of secondary metabolites. Glycosylation steps are implicated not only in plant growth and development, but also in plant defense responses. Although the activities of uridine-dependent glycosyltransferases (UGTs) have long been recognized, and genes encoding them in several higher plants have been identified, the specific functions of UGTs in planta remain largely unknown. METHODS: Spatial and temporal patterns of gene expression were analyzed by quantitative reverse transcription (qRT)-polymerase chain reaction (PCR) and GUS histochemical assay...
July 2017: Journal of Ginseng Research
https://www.readbyqxmd.com/read/28695957/interactions-among-gibberellins-brassinosteroids-and-genes-regulate-stomatal-development-in-the-arabidopsis-hypocotyl
#4
Diego González, Sonia Fuentes, Laura Serna
Stomata are pores on the plant surface that enable gas exchange with the atmosphere. In Arabidopsis thaliana, brassinosteroids, which function upstream of the TTG/bHLHs/MYBs/GL2 transcriptional network, positively regulate stomatal formation in the hypocotyl. Gibberellins also promote stomatal development in the embryonic stem. Here, we investigated the hypothetical interactions between the gibberellin and brassinosteroid signaling pathways during stomatal formation. By combining genetics and gene expression studies, we found that gibberellins promote stomatal development, functioning upstream of both brassinosteroids and the TTG/bHLHs/MYBs/GL2 network...
2017: International Journal of Developmental Biology
https://www.readbyqxmd.com/read/28680425/osbsk1-2-an-orthologous-of-atbsk1-is-involved-in-rice-immunity
#5
Jing Wang, Hui Shi, Lian Zhou, Chunfang Peng, Dingyou Liu, Xiaogang Zhou, Wenguan Wu, Junjie Yin, Hai Qin, Weiwei Ma, Min He, Weitao Li, Jichun Wang, Shigui Li, Xuewei Chen
The brassinosteroid-SIGNALING KINASE (BSK) belongs to the receptor-like cytoplasmic kinase XII subgroup. BSK1 regulates development and immunity in Arabidopsis. However, the function of rice (Oryza sativa) BSK1 is largely unknown. Here, we report that the expression level of OsBSK1-2 is induced after a chitin or fagellin22 (flg22) treatment. Silencing OsBSK1-2 in rice results in compromised responses to chitin- or flg22-triggered immunity and resistance to Magnaporthe oryzae, but does not alter the plant's architecture nor reduce plant responses to brassinosteroid signaling...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28676808/gibberellins-promote-brassinosteroids-action-and-both-increase-heterosis-for-plant-height-in-maize-zea-mays-l
#6
Songlin Hu, Cuiling Wang, Darlene L Sanchez, Alexander E Lipka, Peng Liu, Yanhai Yin, Michael Blanco, Thomas Lübberstedt
Brassinosteroids (BRs) and Gibberellins (GAs) are two classes of plant hormones affecting plant height (PHT). Thus, manipulation of BR and GA levels or signaling enables optimization of crop grain and biomass yields. We established backcross (BC) families, selected for increased PHT, in two elite maize inbred backgrounds. Various exotic accessions used in the germplasm enhancement in maize project served as donors. BC1-derived doubled haploid lines in the same two elite maize inbred backgrounds established without selection for plant height were included for comparison...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28674542/physiological-mechanism-of-enhancing-salt-stress-tolerance-of-perennial-ryegrass-by-24-epibrassinolide
#7
Wenli Wu, Qiang Zhang, Erik H Ervin, Zhiping Yang, Xunzhong Zhang
Brassinosteroids (BR) regulate plant tolerance to salt stress but the mechanisms underlying are not fully understood. This study was to investigate physiological mechanisms of 24-epibrassinolide (EBR)'s impact on salt stress tolerance in perennial ryegrass (Lolium perenne L.) The grass seedlings were treated with EBR at 0, 10, and 100 nM, and subjected to salt stress (250 mM NaCl). The grass irrigated with regular water without EBR served as the control. Salt stress increased leaf electrolyte leakage (EL), malondialdehyde (MDA), and reduced photosynthetic rate (Pn)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28652362/phosphosite-charge-rather-than-shootward-localization-determines-octopus-activity-in-root-protophloem
#8
Alice S Breda, Ora Hazak, Christian S Hardtke
Polar cellular localization of proteins is often associated with their function and activity. In plants, relatively few polar-localized factors have been described. Among them, the plasma membrane-associated Arabidopsis proteins OCTOPUS (OPS) and BREVIS RADIX (BRX) display shootward and rootward polar localization, respectively, in developing root protophloem cells. Both ops and brx null mutants exhibit defects in protophloem differentiation. Here we show that OPS and BRX act genetically in parallel in this process, although OPS dosage increase mends defects caused by brx loss-of-function...
July 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28618117/itraq-based-proteomics-of-sunflower-cultivars-differing-in-resistance-to-parasitic-weed-orobanche-cumana
#9
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
#10
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
#11
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
#12
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-responses
#13
Jiani Chen, Trevor M 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-SUPPRESSOR1/BRASSINAZOLE-RESISTANT1 (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. 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 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
#14
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
#15
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
#16
Thomas R Vincent, Marieta Avramova, James Canham, Peter Higgins, Natasha Bilkey, Sam T Mugford, Marco Pitino, Masatsugu Toyota, Simon Gilroy, Anthony J Miller, Saskia A 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 localized plant calcium elevations around the feeding sites of M...
June 2017: Plant Cell
https://www.readbyqxmd.com/read/28545052/brl3-and-atrgs1-cooperate-to-fine-tune-growth-inhibition-and-ros-activation
#17
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
#18
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...
June 27, 2017: Molecular BioSystems
https://www.readbyqxmd.com/read/28540554/understanding-brassinosteroid-regulated-mechanisms-to-improve-stress-tolerance-in-plants-a-critical-review
#19
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...
July 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
#20
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...
August 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
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