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https://www.readbyqxmd.com/read/28736168/light-dependent-degradation-of-pif3-by-scf-ebf1-2-promotes-a-photomorphogenic-response-in-arabidopsis
#1
Jie Dong, Weimin Ni, Renbo Yu, Xing Wang Deng, Haodong Chen, Ning Wei
Plant seedlings emerging from darkness into the light environment undergo photomorphogenesis, which enables autotrophic growth with optimized morphology and physiology. During this transition, plants must rapidly remove photomorphogenic repressors accumulated in the dark. Among them is PHYTOCHROME-INTERACTING FACTOR 3 (PIF3), a key transcription factor promoting hypocotyl growth. Here we report that, in response to light activation of phytochrome photoreceptors, EIN3-BINDING F BOX PROTEINs (EBFs) 1 and 2 mediate PIF3 protein degradation in a manner dependent on light-induced phosphorylation of PIF3...
July 18, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28625764/genome-wide-identification-and-expression-profiling-of-eil-gene-family-in-woody-plant-representative-poplar-populus-trichocarpa
#2
Ertugrul Filiz, Recep Vatansever, Ibrahim Ilker Ozyigit, Mehmet Emin Uras, Ugur Sen, Naser A Anjum, Eduarda Pereira
This study aimed to improve current understanding on ethylene-insensitive 3-like (EIL) members, least explored in woody plants such as poplar (Populus trichocarpa Torr. & Grey). Herein, seven putative EIL members were identified in P. trichocarpa genome and were roughly annotated either as EIN3-like sequence associated with ethylene pathway or EIL3-like sequences related with sulfur (S)-pathway. Motif-distribution pattern of proteins also corroborated this annotation. They were distributed on six chromosomes (chr1, 3, 4 and 8-10), and were revealed to encode a protein of 509-662 residues with nuclear localization...
August 1, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28600557/regulatory-functions-of-cellular-energy-sensor-snf1-related-kinase1-for-leaf-senescence-delay-through-ethylene-insensitive3-repression
#3
Geun-Don Kim, Young-Hee Cho, Sang-Dong Yoo
Aging of living organisms is governed by intrinsic developmental programs, of which progression is often under the regulation of their cellular energy status. For example, calorie restriction is known to slow down aging of heterotrophic organisms from yeasts to mammals. In autotrophic plants cellular energy deprivation by perturbation of photosynthesis or sugar metabolism is also shown to induce senescence delay. However, the underlying molecular and biochemical mechanisms remain elusive. Our plant cell-based functional and biochemical assays have demonstrated that SNF1-RELATED KINASE1 (SnRK1) directly interacts, phosphorylates, and destabilizes the key transcription factor ETHYLENE INSENSITIVE3 (EIN3) in senescence-promoting hormone ethylene signaling...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28584725/genome-wide-analysis-suggests-high-level-of-microsynteny-and-purifying-selection-affect-the-evolution-of-ein3-eil-family-in-rosaceae
#4
Yunpeng Cao, Yahui Han, Dandan Meng, Dahui Li, Qing Jin, Yi Lin, Yongping Cai
The ethylene-insensitive3/ethylene-insensitive3-like (EIN3/EIL) proteins are a type of nuclear-localized protein with DNA-binding activity in plants. Although the EIN3/EIL gene family has been studied in several plant species, little is known about comprehensive study of the EIN3/EIL gene family in Rosaceae. In this study, ten, five, four, and five EIN3/EIL genes were identified in the genomes of pear (Pyrus bretschneideri), mei (Prunus mume), peach (Prunus persica) and strawberry (Fragaria vesca), respectively...
2017: PeerJ
https://www.readbyqxmd.com/read/28584283/phytohormone-ethylene-responsive-arabidopsis-organ-growth-under-light-is-in-the-fine-regulation-of-photosystem-ii-deficiency-inducible-akin10-expression
#5
Geun-Don Kim, Young-Hee Cho, Sang-Dong Yoo
For photoautotrophic plants, light-dependent photosynthesis plays an important role in organismal growth and development. Under light, Arabidopsis hypocotyl growth is promoted by the phytohormone ethylene. Despite well-characterized ethylene signaling pathways, the functions of light in the hormone-inducible growth response still remain elusive. Our cell-based functional and plant-system-based genetic analyses with biophysical and chemical tools showed that a chemical blockade of photosystem (PS) II activity affects ethylene-induced hypocotyl response under light...
June 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28458678/comprehensive-transcriptome-analyses-reveal-differential-gene-expression-profiles-of-camellia-sinensis-axillary-buds-at-para-endo-ecodormancy-and-bud-flush-stages
#6
Xinyuan Hao, Yajun Yang, Chuan Yue, Lu Wang, David P Horvath, Xinchao Wang
Winter dormancy is an important biological feature for tea plant to survive cold winters, and it also affects the economic output of tea plant, one of the few woody plants in the world whose leaves are harvested and one of the few non-conifer evergreen species with characterized dormancies. To discover the bud dormancy regulation mechanism of tea plant in winter, we analyzed the global gene expression profiles of axillary buds at the paradormancy, endodormancy, ecodormancy, and bud flush stages by RNA-Seq analysis...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28300216/ein3-and-sos2-synergistically-modulate-plant-salt-tolerance
#7
Ruidang Quan, Juan Wang, Dexin Yang, Haiwen Zhang, Zhijin Zhang, Rongfeng Huang
Ethylene biosynthesis and the ethylene signaling pathway regulate plant salt tolerance by activating the expression of downstream target genes such as those related to ROS and Na(+)/K(+) homeostasis. The Salt Overly Sensitive (SOS) pathway regulates Na(+)/K(+) homeostasis in Arabidopsis under salt stress. However, the connection between these two pathways is unclear. Through genetic screening, we identified two sos2 alleles as salt sensitive mutants in the ein3-1 background. Neither Ethylene-Insensitive 2 (EIN2) nor EIN3 changed the expression patterns of SOS genes including SOS1, SOS2, SOS3 and SOS3-like Calcium Binding Protein 8 (SCaBP8), but SOS2 activated the expression of one target gene of EIN3, Ethylene and Salt-inducible ERF 1 (ESE1)...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28286514/ethylene-improves-root-system-development-under-cadmium-stress-by-modulating-superoxide-anion-concentration-in-arabidopsis-thaliana
#8
Ann Abozeid, Zuojia Ying, Yingchao Lin, Jia Liu, Zhonghua Zhang, Zhonghua Tang
This work aims at identifying the effects of ethylene on the response of Arabidopsis thaliana root system to cadmium chloride (CdCl2) stress. Two ethylene-insensitive mutants, ein2-5 and ein3-1eil1-1, were subjected to (25, 50, 75, and 100 μM) CdCl2 concentrations, from which 75 μM concentration decreased root growth by 40% compared with wild type Col-0 as a control. Ethylene biosynthesis increased in response to CdCl2 treatment. The length of primary root and root tip in ein2-5 and ein3-1eil1-1 decreased compared with wild type after CdCl2 treatment, suggesting that ethylene play a role in root system response to Cd stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28168848/ora59-and-ein3-interaction-couples-jasmonate-ethylene-synergistic-action-to-antagonistic-salicylic-acid-regulation-of-pdf-expression
#9
Xiang He, Jishan Jiang, Chang-Quan Wang, Katayoon Dehesh
Hormonal crosstalk is central for tailoring plant responses to the nature of challenges encountered. The role of antagonism between the two major defense hormones, salicylic acid (SA) and jasmonic acid (JA), and modulation of this interplay by ethylene (ET) in favor of JA signaling pathway in plant stress responses is well recognized, but the underlying mechanism is not fully understood. Here, we show the opposing function of two transcription factors, ethylene insensitive3 (EIN3) and EIN3-Like1 (EIL1), in SA-mediated suppression and JA-mediated activation of PLANT DEFENSIN1...
April 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28112257/ethylene-response-pathway-modulates-attractiveness-of-plant-roots-to-soybean-cyst-nematode-heterodera-glycines
#10
Yanfeng Hu, Jia You, Chunjie Li, Valerie M Williamson, Congli Wang
Plant parasitic nematodes respond to root exudates to locate their host roots. In our studies second stage juveniles of Heterodera glycines, the soybean cyst nematode (SCN), quickly migrated to soybean roots in Pluronic F-127 gel. Roots of soybean and non-host Arabidopsis treated with the ethylene (ET)-synthesis inhibitor aminoethoxyvinylglycine (AVG) were more attractive to SCN than untreated roots, and significantly more nematodes penetrated into roots. Moreover, Arabidopsis ET insensitive mutants (ein2, ein2-1, ein2-5, ein3-1, ein5-1, and ein6) were more attractive than wild-type plants...
January 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/27968996/ein3-interferes-with-the-sulfur-deficiency-signaling-in-arabidopsis-thaliana-through-direct-interaction-with-the-slim1-transcription-factor
#11
Anna Wawrzyńska, Agnieszka Sirko
Sulfur deficiency in plants leads to metabolic reprogramming through changes of gene expression. SLIM1 is so far the only characterized transcription factor associated strictly with sulfur deficiency stress in Arabidopsis thaliana. It belongs to the same protein family as EIN3, a major positive switch of ethylene signaling pathway. It binds to the specific cis sequence called UPE-box. Here we show that SLIM1 interacts with UPE-box as a homodimer. Interestingly, the same region of the protein is used for heterodimerization with EIN3; however, the heterodimer is not able to recognize UPE-box...
December 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27923118/cutting-out-the-middle-man-in-light-hormone-interactions
#12
COMMENT
Anna N Stepanova, Jose M Alonso
In this issue of Developmental Cell, Shi et al. (2016a) show that red-light-activated phytochrome B interacts with transcriptional regulators of ethylene signaling, EIN3/EIL1, triggering their degradation by bringing the F-box proteins EBF1 and 2 to the complex. These findings provide a paradigm for crosstalk between light and hormone signaling pathways.
December 5, 2016: Developmental Cell
https://www.readbyqxmd.com/read/27889482/the-red-light-receptor-phytochrome-b-directly-enhances-substrate-e3-ligase-interactions-to-attenuate-ethylene-responses
#13
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...
December 5, 2016: Developmental Cell
https://www.readbyqxmd.com/read/27847510/molecular-characterization-and-functional-analysis-of-two-petunia-pheils
#14
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
#15
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
#16
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...
February 2017: 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
#17
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
#18
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
#19
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
#20
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...
November 2016: Plant Molecular Biology
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