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https://www.readbyqxmd.com/read/27889482/the-red-light-receptor-phytochrome-b-directly-enhances-substrate-e3-ligase-interactions-to-attenuate-ethylene-responses
#1
Hui Shi, Xing Shen, Renlu Liu, Chang Xue, Ning Wei, Xing Wang Deng, Shangwei Zhong
Plants germinating under subterranean darkness assume skotomorphogenesis, a developmental program strengthened by ethylene in response to mechanical pressure of soil. Upon reaching the surface, light triggers a dramatic developmental transition termed de-etiolation that requires immediate termination of ethylene responses. Here, we report that light activation of photoreceptor phyB results in rapid degradation of EIN3, the master transcription factor in the ethylene signaling pathway. As a result, light rapidly and efficiently represses ethylene actions...
November 16, 2016: Developmental Cell
https://www.readbyqxmd.com/read/27870849/phosphorylation-of-cbp20-links-microrna-to-root-growth-in-the-ethylene-response
#2
Fan Zhang, Likai Wang, Jae Yun Lim, Taewook Kim, Youngjae Pyo, Sibum Sung, Chanseok Shin, Hong Qiao
Ethylene is one of the most important hormones for plant developmental processes and stress responses. However, the phosphorylation regulation in the ethylene signaling pathway is largely unknown. Here we report the phosphorylation of cap binding protein 20 (CBP20) at Ser245 is regulated by ethylene, and the phosphorylation is involved in root growth. The constitutive phosphorylation mimic form of CBP20 (CBP20S245E or CBP20S245D), while not the constitutive de-phosphorylation form of CBP20 (CBP20S245A) is able to rescue the root ethylene responsive phenotype of cbp20...
November 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27848154/jasmonic-acid-and-ethylene-signaling-pathways-regulate-glucosinolate-levels-in-plants-during-rhizobacteria-induced-systemic-resistance-against-a-leaf-chewing-herbivore
#3
Nurmi Pangesti, Michael Reichelt, Judith E van de Mortel, Eleni Kapsomenou, Jonathan Gershenzon, Joop J A van Loon, Marcel Dicke, Ana Pineda
Beneficial soil microbes can promote plant growth and induce systemic resistance (ISR) in aboveground tissues against pathogens and herbivorous insects. Despite the increasing interest in microbial-ISR against herbivores, the underlying molecular and chemical mechanisms of this phenomenon remain elusive. Using Arabidopsis thaliana and the rhizobacterium Pseudomonas simiae WCS417r (formerly known as P. fluorescens WCS417r), we here evaluate the role of the JA-regulated MYC2-branch and the JA/ET-regulated ORA59-branch in modulating rhizobacteria-ISR to Mamestra brassicae by combining gene transcriptional, phytochemical, and herbivore performance assays...
November 15, 2016: Journal of Chemical Ecology
https://www.readbyqxmd.com/read/27847510/molecular-characterization-and-functional-analysis-of-two-petunia-pheils
#4
Feng Liu, Li Hu, Yuanping Cai, Hong Lin, Juanxu Liu, Yixun Yu
Ethylene plays an important role in flower senescence of many plants. Arabidopsis ETHYLENE INSENSITIVE3 (EIN3) and its homolog EIL1 are the downstream component of ethylene signaling transduction. However, the function of EILs during flower senescence remains unknown. Here, a petunia EIL gene, PhEIL2, was isolated. Phylogenetic tree showed that PhEIL1, whose coding gene is previously isolated, and PhEIL2 are the homologs of Arabidopsis AtEIL3 and AtEIL1, respectively. The expression of both PhEIL1 and PhEIL2 is the highest in corollas and increased during corolla senescence...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27831474/ethylene-and-auxin-interaction-in-the-control-of-adventitious-rooting-in-arabidopsis-thaliana
#5
A Veloccia, L Fattorini, F Della Rovere, A Sofo, S D'Angeli, C Betti, G Falasca, M M Altamura
Adventitious roots (ARs) are post-embryonic roots essential for plant survival and propagation. Indole-3-acetic acid (IAA) is the auxin that controls AR formation; however, its precursor indole-3-butyric acid (IBA) is known to enhance it. Ethylene affects many auxin-dependent processes by affecting IAA synthesis, transport and/or signaling, but its role in AR formation has not been elucidated. This research investigated the role of ethylene in AR formation in dark-grown Arabidopsis thaliana seedlings, and its interaction with IAA/IBA...
November 9, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27830829/cellulase-from-trichoderma-harzianum-interacts-with-roots-and-triggers-induced-systemic-resistance-to-foliar-disease-in-maize
#6
Kandasamy Saravanakumar, Lili Fan, Kehe Fu, Chuanjin Yu, Meng Wang, Hai Xia, Jianan Sun, Yaqian Li, Jie Chen
Trichoderma harzianum is well known to exhibit induced systemic resistance (ISR) to Curvularia leaf spot. We previously reported that a C6 zinc finger protein (Thc6) is responsible for a major contribution to the ISR to the leaf disease, but the types of effectors and the signals mediated by Thc6 from Trichoderma are unclear. In this work, we demonstrated that two hydrolases, Thph1 and Thph2, from T. harzianum were regulated by Thc6. Furthermore, an electrophoretic mobility shift assay (EMSA) study revealed that Thc6 regulated mRNA expression by binding to GGCTAA and GGCTAAA in the promoters of the Thph1 and Thph2 genes, respectively...
November 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27829023/constans-like-9-oscol9-interacts-with-receptor-for-activated-c-kinase-1-osrack1-to-regulate-blast-resistance-through-salicylic-acid-and-ethylene-signaling-pathways
#7
Hao Liu, Shuangyu Dong, Dayuan Sun, Wei Liu, Fengwei Gu, Yongzhu Liu, Tao Guo, Hui Wang, Jiafeng Wang, Zhiqiang Chen
In a previous transcriptome analysis of early response genes in rice during Magnaporthe oryzae infection, we identified a CONSTANS-like (COL) gene OsCOL9. In the present study, we investigated the functional roles of OsCOL9 in blast resistance. OsCOL9 belonged to group II of the COL protein family, and it contained a BB-box and a C-terminal CCT (CONSTANS, COL and TOC1) domain. OsCOL9 was found in the nucleus of rice cells, and it exerted transcriptional activation activities through its middle region (MR). Magnaporthe oryzae infection induced OsCOL9 expression, and transgenic OsCOL9 knock-out rice plants showed increased pathogen susceptibility...
2016: PloS One
https://www.readbyqxmd.com/read/27822221/activation-of-hls1-by-mechanical-stress-via-ethylene-stabilized-ein3-is-crucial-for-seedling-soil-emergence
#8
Xing Shen, Yanli Li, Ying Pan, Shangwei Zhong
The seeds of terrestrial flowering plants often start their life cycle in subterranean darkness. To protect the fragile apical meristematic tissues and cotyledons from mechanical injuries during soil penetration, dicotyledonous seedlings form an elegant apical hook at the top of the hypocotyl. The apical hook has been considered as an adaption structure to the subterranean environment. However, the role of the apical hook in seedling emergence and the molecular mechanism of apical hook formation under real-life conditions remain highly speculative...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27799284/multiple-phytohormones-promote-root-hair-elongation-by-regulating-a-similar-set-of-genes-in-the-root-epidermis-in-arabidopsis
#9
Shan Zhang, Linli Huang, An Yan, Yihua Liu, Bohan Liu, Chunyan Yu, Aidong Zhang, John Schiefelbein, Yinbo Gan
Multiple phytohormones, including auxin, ethylene, and cytokinin, play vital roles in regulating cell development in the root epidermis. However, their interactions in specific root hair cell developmental stages are largely unexplored. To bridge this gap, we employed genetic and pharmacological approaches as well as transcriptional analysis in order to dissect their distinct and overlapping roles in root hair initiation and elongation in Arabidopsis thaliana Our results show that among auxin, ethylene, and cytokinin, only ethylene induces ectopic root hair cells in wild-type plants, implying a special role of ethylene in the hair initiation stage...
October 31, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/27739520/ethylene-and-hydrogen-peroxide-are-involved-in-brassinosteroid-induced-salt-tolerance-in-tomato
#10
Tong Zhu, Xingguang Deng, Xue Zhou, Lisha Zhu, Lijuan Zou, Pengxu Li, Dawei Zhang, Honghui Lin
Crosstalk between phytohormone pathways is essential in plant growth, development and stress responses. Brassinosteroids (BRs) and ethylene are both pivotal plant growth regulators, and the interaction between these two phytohormones in the tomato response to salt stress is still unclear. Here, we explored the mechanism by which BRs affect ethylene biosynthesis and signaling in tomato seedlings under salt stress. The activity of 1-aminocyclopropane-1-carboxylate synthase (ACS), an ethylene synthesis enzyme, and the ethylene signaling pathway were activated in plants pretreated with BRs...
October 14, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27716807/local-transcriptional-control-of-yucca-regulates-auxin-promoted-root-growth-inhibition-in-response-to-aluminium-stress-in-arabidopsis
#11
Guangchao Liu, Shan Gao, Huiyu Tian, Wenwen Wu, Hélène S Robert, Zhaojun Ding
Auxin is necessary for the inhibition of root growth induced by aluminium (Al) stress, however the molecular mechanism controlling this is largely unknown. Here, we report that YUCCA (YUC), which encodes flavin monooxygenase-like proteins, regulates local auxin biosynthesis in the root apex transition zone (TZ) in response to Al stress. Al stress up-regulates YUC3/5/7/8/9 in the root-apex TZ, which we show results in the accumulation of auxin in the root-apex TZ and root-growth inhibition during the Al stress response...
October 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27701783/activation-of-ethylene-signaling-pathways-enhances-disease-resistance-by-regulating-ros-and-phytoalexin-production-in-rice
#12
Chao Yang, Wen Li, Jidong Cao, Fanwei Meng, Yongqi Yu, Junkai Huang, Lan Jiang, Muxing Liu, Zhengguang Zhang, Xuewei Chen, Koji Miyamoto, Hisakazu Yamane, Jinsong Zhang, Shouyi Chen, Jun Liu
Ethylene plays diverse roles in plant growth, development and stress responses. However, the roles of ethylene signaling in immune responses remain largely unknown. In this study, we showed that the blast fungus Magnaporthe oryzae infection activated ethylene biosynthesis in rice. Resistant rice cultivars accumulated higher levels of ethylene than susceptible ones. Ethylene signaling components OsEIN2 and the downstream transcription factor OsEIL1 positively regulated disease resistance. Mutation of OsEIN2 led to enhanced disease susceptibility...
October 4, 2016: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/27694846/ein2-dependent-regulation-of-acetylation-of-histone-h3k14-and-non-canonical-histone-h3k23-in-ethylene-signalling
#13
Fan Zhang, Bin Qi, Likai Wang, Bo Zhao, Siddharth Rode, Nathaniel D Riggan, Joseph R Ecker, Hong Qiao
Ethylene gas is essential for many developmental processes and stress responses in plants. EIN2 plays a key role in ethylene signalling but its function remains enigmatic. Here, we show that ethylene specifically elevates acetylation of histone H3K14 and the non-canonical acetylation of H3K23 in etiolated seedlings. The up-regulation of these two histone marks positively correlates with ethylene-regulated transcription activation, and the elevation requires EIN2. Both EIN2 and EIN3 interact with a SANT domain protein named EIN2 nuclear associated protein 1 (ENAP1), overexpression of which results in elevation of histone acetylation and enhanced ethylene-inducible gene expression in an EIN2-dependent manner...
October 3, 2016: Nature Communications
https://www.readbyqxmd.com/read/27681726/global-transcriptomic-analysis-of-targeted-silencing-of-two-paralogous-acc-oxidase-genes-in-banana
#14
Yan Xia, Chi Kuan, Chien-Hsiang Chiu, Xiao-Jing Chen, Yi-Yin Do, Pung-Ling Huang
Among 18 1-aminocyclopropane-1-carboxylic acid (ACC) oxidase homologous genes existing in the banana genome there are two genes, Mh-ACO1 and Mh-ACO2, that participate in banana fruit ripening. To better understand the physiological functions of Mh-ACO1 and Mh-ACO2, two hairpin-type siRNA expression vectors targeting both the Mh-ACO1 and Mh-ACO2 were constructed and incorporated into the banana genome by Agrobacterium-mediated transformation. The generation of Mh-ACO1 and Mh-ACO2 RNAi transgenic banana plants was confirmed by Southern blot analysis...
2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27677986/ethylene-regulated-glutamate-dehydrogenase-fine-tunes-metabolism-during-anoxia-reoxygenation
#15
Kuen-Jin Tsai, Chih-Yu Lin, Chen-Yun Ting, Ming-Che Shih
Ethylene is an essential hormone in plants that is involved in low-oxygen and reoxygenation responses. As a key transcription factor in ethylene signaling, ETHYLENE INSENSITIVE3 (EIN3) activates targets that trigger various responses. However, most of these targets are still poorly characterized. Through analyses of our microarray data and the published Arabidopsis (Arabidopsis thaliana) EIN3 chromatin immunoprecipitation sequencing data set, we inferred the putative targets of EIN3 during anoxia-reoxygenation...
November 2016: Plant Physiology
https://www.readbyqxmd.com/read/27671120/ethylene-biosynthesis-and-signaling-is-required-for-rice-immune-response-and-basal-resistance-against-magnaporthe-oryzae-infection
#16
Emily E Helliwell, Qin Wang, Yinong Yang
Recent studies have suggested that ethylene enhances host resistance to fungal pathogen Magnaporthe oryzae, the causal agent of rice blast disease. Among the six ACS genes in rice, OsACS1 and OsACS2 are induced within 24 hours of inoculation by M. oryzae. This induction occurs simultaneously with an increase in ethylene production that is noticeable 12 hours post inoculation. The purpose of this study was to examine the dynamics of ethylene production and signaling in wild type and RNAi-mediated suppression lines deficient in ethylene production (acs2) or signaling (eil1) after challenge with M...
September 27, 2016: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/27625669/analysis-of-network-topologies-underlying-ethylene-growth-response-kinetics
#17
Aaron M Prescott, Forest W McCollough, Bryan L Eldreth, Brad M Binder, Steven M Abel
Most models for ethylene signaling involve a linear pathway. However, measurements of seedling growth kinetics when ethylene is applied and removed have resulted in more complex network models that include coherent feedforward, negative feedback, and positive feedback motifs. The dynamical responses of the proposed networks have not been explored in a quantitative manner. Here, we explore (i) whether any of the proposed models are capable of producing growth-response behaviors consistent with experimental observations and (ii) what mechanistic roles various parts of the network topologies play in ethylene signaling...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27594858/comprehensive-transcriptome-profiling-reveals-long-noncoding-rna-expression-and-alternative-splicing-regulation-during-fruit-development-and-ripening-in-kiwifruit-actinidia-chinensis
#18
Wei Tang, Yi Zheng, Jing Dong, Jia Yu, Junyang Yue, Fangfang Liu, Xiuhong Guo, Shengxiong Huang, Michael Wisniewski, Jiaqi Sun, Xiangli Niu, Jian Ding, Jia Liu, Zhangjun Fei, Yongsheng Liu
Genomic and transcriptomic data on kiwifruit (Actinidia chinensis) in public databases are very limited despite its nutritional and economic value. Previously, we have constructed and sequenced nine fruit RNA-Seq libraries of A. chinensis "Hongyang" at immature, mature, and postharvest ripening stages of fruit development, and generated over 66.2 million paired-end and 24.4 million single-end reads. From this dataset, here we have identified 7051 long noncoding RNAs (lncRNAs), 29,327 alternative splicing (AS) events and 2980 novel protein-coding genes that were not annotated in the draft genome of "Hongyang...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27588421/gmcyp82a3-a-soybean-cytochrome-p450-family-gene-involved-in-the-jasmonic-acid-and-ethylene-signaling-pathway-enhances-plant-resistance-to-biotic-and-abiotic-stresses
#19
Qiang Yan, Xiaoxia Cui, Shuai Lin, Shuping Gan, Han Xing, Daolong Dou
The cytochrome P450 monooxygenases (P450s) represent a large and important enzyme superfamily in plants. They catalyze numerous monooxygenation/hydroxylation reactions in biochemical pathways, P450s are involved in a variety of metabolic pathways and participate in the homeostasis of phytohormones. The CYP82 family genes specifically reside in dicots and are usually induced by distinct environmental stresses. However, their functions are largely unknown, especially in soybean (Glycine max L.). Here, we report the function of GmCYP82A3, a gene from soybean CYP82 family...
2016: PloS One
https://www.readbyqxmd.com/read/27539720/transcriptomic-changes-in-nicotiana-benthamiana-plants-inoculated-with-the-wild-type-or-an-attenuated-mutant-of-tobacco-vein-banding-mosaic-virus
#20
Chao Geng, Hong-Yan Wang, Jin Liu, Zhi-Yong Yan, Yan-Ping Tian, Xue-Feng Yuan, Rui Gao, Xiang-Dong Li
Tobacco vein banding mosaic virus (TVBMV) is a potyvirus which mainly infects solanaceous crops. The helper component proteinase (HCpro) of a potyvirus is an RNA silencing suppressor protein and determines the severity of disease symptoms caused by different potyviruses, including TVBMV. It has been shown that substitution mutations introduced into the HCpro open reading frame (ORF) in a TVBMV infectious clone result in changes of Asp189 to Lys or Ile250 -Gln251 to Asp-Glu (Asp, aspartic acid; Gln, glutamine; Glu, glutamic acid; Ile, isoleucine)...
August 19, 2016: Molecular Plant Pathology
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