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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/27847510/molecular-characterization-and-functional-analysis-of-two-petunia-pheils
#2
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/27822221/activation-of-hls1-by-mechanical-stress-via-ethylene-stabilized-ein3-is-crucial-for-seedling-soil-emergence
#3
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/27817120/identification-of-anthocyanin-biosynthesis-related-micrornas-in-a-distinctive-chinese-radish-raphanus-sativus-l-by-high-throughput-sequencing
#4
Yuyan Sun, Yang Qiu, Mengmeng Duan, Jinglei Wang, Xiaohui Zhang, Haiping Wang, Jiangping Song, Xixiang Li
Anthocyanins are widely distributed water-soluble phytochemical pigments belonging to the flavonoid group. To date, limited knowledge is available about the regulatory roles of miRNAs in anthocyanin biosynthesis in plants. To identify the miRNAs associated with anthocyanin biosynthesis in radish, five small RNA (sRNA) libraries constructed from 'Xinlimei' radish roots at 11, 21, 44, 56 and 73 days (d) were examined using high-throughput sequencing technology. A total of 102.02 million (M) clean reads were generated, from which 483 known and 1415 novel miRNAs were identified...
November 5, 2016: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/27716807/local-transcriptional-control-of-yucca-regulates-auxin-promoted-root-growth-inhibition-in-response-to-aluminium-stress-in-arabidopsis
#5
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/27694846/ein2-dependent-regulation-of-acetylation-of-histone-h3k14-and-non-canonical-histone-h3k23-in-ethylene-signalling
#6
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/27677986/ethylene-regulated-glutamate-dehydrogenase-fine-tunes-metabolism-during-anoxia-reoxygenation
#7
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/27586543/transcriptome-profiling-of-developmental-leaf-senescence-in-sorghum-sorghum-bicolor
#8
Xiao-Yuan Wu, Wei-Juan Hu, Hong Luo, Yan Xia, Yi Zhao, Li-Dong Wang, Li-Min Zhang, Jing-Chu Luo, Hai-Chun Jing
This piece of the submission is being sent via mail. Leaf senescence is essential for the nutrient economy of crops and is executed by so-called senescence-associated genes (SAGs). Here we explored the monocot C4 model crop Sorghum bicolor for a holistic picture of SAG profiles by RNA-seq. Leaf samples were collected at four stages during developmental senescence, and in total, 3396 SAGs were identified, predominantly enriched in GO categories of metabolic processes and catalytic activities. These genes were enriched in 13 KEGG pathways, wherein flavonoid and phenylpropanoid biosynthesis and phenylalanine metabolism were overrepresented...
September 1, 2016: Plant Molecular Biology
https://www.readbyqxmd.com/read/27486469/phytochrome-and-ethylene-signaling-integration-in-arabidopsis-occurs-via-the-transcriptional-regulation-of-genes-co-targeted-by-pifs-and-ein3
#9
Jinkil Jeong, Keunhwa Kim, Mi E Kim, Hye G Kim, Gwi S Heo, Ohkmae K Park, Youn-Il Park, Giltsu Choi, Eunkyoo Oh
Plant seedlings germinating under the soil are challenged by rough soil grains that can induce physical damage and sudden exposure to light, which can induce photobleaching. Seedlings overcome these challenges by developing apical hooks and by suppressing chlorophyll precursor biosynthesis. These adaptive responses are, respectively, regulated by the phytochrome and ethylene signaling pathways via the PHYTOCHROME-INTERACTING FACTORs (PIFs) and the ETHYLENE INSENSITIVE 3 (EIN3)/EIN3-LIKE transcription factors...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27435661/ethylene-response-factor-terf1-regulated-by-ethylene-insensitive3-like-factors-functions-in-reactive-oxygen-species-ros-scavenging-in-tobacco-nicotiana-tabacum-l
#10
Hongbo Zhang, Ang Li, Zhijin Zhang, Zejun Huang, Pingli Lu, Dingyu Zhang, Xinmin Liu, Zhong-Feng Zhang, Rongfeng Huang
The phytohormone ethylene plays a crucial role in the production and accumulation of reactive oxygen species (ROS) in plants under stress conditions. Ethylene response factors (ERFs) are important ethylene-signaling regulators functioning in plant defense responses against biotic and abiotic stresses. However, the roles of ERFs during plant adapting to ROS stress have not yet been well documented. Our studies previously reported that a tomato ERF transcription factor TERF1 functions in the regulation of plant ethylene responses and stress tolerance...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27427911/the-molecular-mechanism-of-ethylene-mediated-root-hair-development-induced-by-phosphate-starvation
#11
Li Song, Haopeng Yu, Jinsong Dong, Ximing Che, Yuling Jiao, Dong Liu
Enhanced root hair production, which increases the root surface area for nutrient uptake, is a typical adaptive response of plants to phosphate (Pi) starvation. Although previous studies have shown that ethylene plays an important role in root hair development induced by Pi starvation, the underlying molecular mechanism is not understood. In this work, we characterized an Arabidopsis mutant, hps5, that displays constitutive ethylene responses and increased sensitivity to Pi starvation due to a mutation in the ethylene receptor ERS1...
July 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27335353/l-histidine-induces-resistance-in-plants-to-the-bacterial-pathogen-ralstonia-solanacearum-partially-through-the-activation-of-ethylene-signaling
#12
Shigemi Seo, Kazuhiro Nakaho, Si Won Hong, Hideki Takahashi, Hideyuki Shigemori, Ichiro Mitsuhara
Wilt disease in plants, which is caused by the soil-borne bacterial pathogen Ralstonia solanacearum, is one of the most devastating plant diseases. We previously detected bacterial wilt disease-inhibiting activity in an extract from yeast cells. In the present study, we purified this activity and identified one of the substances responsible for the activity as the amino acid histidine. The exogenous application of l-histidine, but not d-histidine, inhibited wilt disease in tomato and Arabidopsis plants without exhibiting any antibacterial activity...
September 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/27242886/ethylene-antagonizes-salt-induced-growth-retardation-and-cell-death-process-via-transcriptional-controlling-of-ethylene-bag-and-senescence-associated-genes-in-arabidopsis
#13
Ya-Jie Pan, Ling Liu, Ying-Chao Lin, Yuan-Gang Zu, Lei-Peng Li, Zhong-Hua Tang
The existing question whether ethylene is involved in the modulation of salt-induced cell death to mediate plant salt tolerance is important for understanding the salt tolerance mechanisms. Here, we employed Arabidopsis plants to study the possible role of ethylene in salt-induced growth inhibition and programmed cell death (PCD) profiles. The root length, DNA ladder and cell death indicated by Evan's blue detection were measured by compared to the control or salt-stressed seedlings. Secondly, the protoplasts isolated from plant leaves and dyed with Annexin V-FITC were subjected to flow cytometric (FCM) assay...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27230755/transgenic-studies-reveal-the-positive-role-of-leeil-1-in-regulating-shikonin-biosynthesis-in-lithospermum-erythrorhizon-hairy-roots
#14
Rongjun Fang, Ailan Zou, Hua Zhao, Fengyao Wu, Yu Zhu, Hu Zhao, Yonghui Liao, Ren-Jie Tang, Yanjun Pang, Rongwu Yang, Xiaoming Wang, Jinliang Qi, Guihua Lu, Yonghua Yang
BACKGROUND: The phytohormone ethylene (ET) is a key signaling molecule for inducing the biosynthesis of shikonin and its derivatives, which are secondary metabolites in Lithospermum erythrorhizon. Although ETHYLENE INSENSITIVE3 (EIN3)/EIN3-like proteins (EILs) are crucial transcription factors in ET signal transduction pathway, the possible function of EIN3/EIL1 in shikonin biosynthesis remains unknown. In this study, by targeting LeEIL-1 (L. erythrorhizon EIN3-like protein gene 1) at the expression level, we revealed the positive regulatory effect of LeEIL-1 on shikonin formation...
2016: BMC Plant Biology
https://www.readbyqxmd.com/read/26864878/serotonin-modulates-arabidopsis-root-growth-via-changes-in-reactive-oxygen-species-and-jasmonic-acid-ethylene-signaling
#15
Ramón Pelagio-Flores, León Francisco Ruiz-Herrera, José López-Bucio
Serotonin (5-hydroxytryptamine) is a bioactive indoleamine with neurotransmitter function in vertebrates, which represents an emerging signaling molecule in plants, playing key roles in the development and defense. In this study, the role of reactive oxygen species (ROS) and jasmonic acid (JA)-ethylene (Et) signaling in root developmental alterations induced by serotonin was investigated. An Arabidopsis thaliana mutant defective at the RADICAL-INDUCED CELL DEATH1 (RCD1) locus was resistant to paraquat-induced ROS accumulation in primary roots and showed decreased inhibition or root growth in response to serotonin...
September 2016: Physiologia Plantarum
https://www.readbyqxmd.com/read/26850275/salt-stress-and-ethylene-antagonistically-regulate-nucleocytoplasmic-partitioning-of-cop1-to-control-seed-germination
#16
Yanwen Yu, Juan Wang, Hui Shi, Juntao Gu, Jingao Dong, Xing Wang Deng, Rongfeng Huang
Seed germination, a critical stage initiating the life cycle of a plant, is severely affected by salt stress. However, the underlying mechanism of salt inhibition of seed germination (SSG) is unclear. Here, we report that the Arabidopsis (Arabidopsis thaliana) CONSTITUTIVE PHOTOMORPHOGENESIS1 (COP1) counteracts SSG Genetic assays provide evidence that SSG in loss of function of the COP1 mutant was stronger than this in the wild type. A GUS-COP1 fusion was constitutively localized to the nucleus in radicle cells...
April 2016: Plant Physiology
https://www.readbyqxmd.com/read/26813794/the-wheat-mediator-subunit-tamed25-interacts-with-the-transcription-factor-taeil1-to-negatively-regulate-disease-resistance-against-powdery-mildew
#17
Jie Liu, Tianren Zhang, Jizeng Jia, Jiaqiang Sun
Powdery mildew, caused by the biotrophic fungal pathogen Blumeria graminis f. sp. tritici, is a major limitation for the production of bread wheat (Triticum aestivum). However, to date, the transcriptional regulation of bread wheat defense against powdery mildew remains largely unknown. Here, we report the function and molecular mechanism of the bread wheat Mediator subunit 25 (TaMED25) in regulating the bread wheat immune response signaling pathway. Three homoalleles of TaMED25 from bread wheat were identified and mapped to chromosomes 5A, 5B, and 5D, respectively...
March 2016: Plant Physiology
https://www.readbyqxmd.com/read/26648954/links-between-ethylene-and-sulfur-nutrition-a-regulatory-interplay-or-just-metabolite-association
#18
REVIEW
Anna Wawrzynska, Grzegorz Moniuszko, Agnieszka Sirko
Multiple reports demonstrate associations between ethylene and sulfur metabolisms, however the details of these links have not yet been fully characterized; the links might be at the metabolic and the regulatory levels. First, sulfur-containing metabolite, methionine, is a precursor of ethylene and is a rate limiting metabolite for ethylene synthesis; the methionine cycle contributes to both sulfur and ethylene metabolism. On the other hand, ethylene is involved in the complex response networks to various stresses and it is known that S deficiency leads to photosynthesis and C metabolism disturbances that might be responsible for oxidative stress...
2015: Frontiers in Plant Science
https://www.readbyqxmd.com/read/26596766/synergistic-action-of-histone-acetyltransferase-gcn5-and-receptor-clavata1-negatively-affects-ethylene-responses-in-arabidopsis-thaliana
#19
Stylianos Poulios, Konstantinos E Vlachonasios
GENERAL CONTROL NON-REPRESSIBLE 5 (GCN5) is a histone acetyltransferase (HAT) and the catalytic subunit of several multicomponent HAT complexes that acetylate lysine residues of histone H3. Mutants in AtGCN5 display pleiotropic developmental defects including aberrant meristem function. Shoot apical meristem (SAM) maintenance is regulated by CLAVATA1 (CLV1), a receptor kinase that controls the size of the shoot and floral meristems. Upon activation through CLV3 binding, CLV1 signals to the transcription factor WUSCHEL (WUS), restricting WUS expression and thus the meristem size...
February 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/26507893/mitogen-activated-protein-kinase-6-mediates-nuclear-translocation-of-ore3-to-promote-ore9-gene-expression-in-methyl-jasmonate-induced-leaf-senescence
#20
Yushan Zhang, Jian Liu, Jinyu Chai, Da Xing
Methyl jasmonate (MeJA) is a potent promoter of plant senescence. ORESARA3 (ORE3)/ETHYLENE INSENSITIVE2 (EIN2), a protein similar to the members of the disease-related Nramp metal transporter family, is involved in cross-talk among several senescence processes related to abscisic acid, ethylene, MeJA, age and darkness. Nevertheless, the mechanism involved in the regulation of ORE3/EIN2 in exogenous MeJA-induced leaf senescence remains unclear. The C-terminal end of ORE3/EIN2 (CEND) was cleaved from ORE3/EIN2 located in the endoplasmic reticulum and then transferred to the nucleus during MeJA-induced senescence...
January 2016: Journal of Experimental Botany
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