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"ethylene signaling"

Wei Zhang, Li-Ying Lu, Li-Yan Hu, Wei Cao, Kai Sun, Qi-Biao Sun, Md Ashaduzzaman Siddikee, Run-Han Shi, Chuan-Chao Dai
Allelopathy is mediated by plant-derived secondary metabolites (allelochemicals), which are released by donor plants, and affect the growth and development of receptor plants. The plant root is the first organ sensing soil allelochemicals that produces shorter primary root, but the mechanisms underlying this process remain elusive. Here, we reported that a model allelochemical benzoic acid (BA) inhibited primary root elongation of Arabidopsis seedlings by reducing the sizes of both the meristem and elongation zones and that auxin signaling affected this process...
June 8, 2018: Plant & Cell Physiology
Xiaohui Yang, Xiao Guo, Yu Yang, Pei Ye, Xingyao Xiong, Jun Liu, Daofeng Dong, Guangcun Li
Late blight caused by the oomycete fungus Phytophthora infestans ( Pi ) is the most serious obstacle to potato ( Solanum tuberosum ) production in the world. A super race isolate, CN152, which was identified from Sichuan Province, China, could overcome nearly all known late blight resistance genes and caused serious damage in China. The potato genotype SD20 was verified to be highly resistant to CN152; however, the molecular regulation network underlying late blight resistance pathway remains unclear in SD20...
June 11, 2018: International Journal of Molecular Sciences
Jinhua Zuo, Yunxiang Wang, Benzhong Zhu, Yunbo Luo, Qing Wang, Lipu Gao
DNA methylation is an essential feature of epigenetic regulation and plays a role in various physiological and biochemical processes at CG, CHG, and CHH sites in plants. LeERF1 is an ethylene response factor (ERF) found in tomatoes which plays an important role in ethylene signal transduction. To explore the characteristics of DNA methylation in the ethylene pathway, sense-/antisense-LeERF1 transgenic tomato fruit were chosen for deep sequencing and bioinformatics parsing. The methylation type with the greatest distribution was CG, (71...
May 21, 2018: Genes
Srivignesh Sundaresan, Sonia Philosoph-Hadas, Chao Ma, Cai-Zhong Jiang, Joseph Riov, Raja Mugasimangalam, Betina Kochanek, Shoshana Salim, Michael S Reid, Shimon Meir
The Tomato Hybrid Proline-rich Protein ( THyPRP ) gene was specifically expressed in the tomato ( Solanum lycopersicum ) flower abscission zone (FAZ), and its stable antisense silencing under the control of an abscission zone (AZ)-specific promoter, Tomato Abscission Polygalacturonase4 , significantly inhibited tomato pedicel abscission following flower removal. For understanding the THyPRP role in regulating pedicel abscission, a transcriptomic analysis of the FAZ of THyPRP -silenced plants was performed, using a newly developed AZ-specific tomato microarray chip...
2018: Horticulture Research
Xiangpei Kong, Cuiling Li, Feng Zhang, Qianqian Yu, Shan Gao, Maolin Zhang, Huiyu Tian, Jian Zhang, Xianzheng Yuan, Zhaojun Ding
Cadmium (Cd) stress is one of the most serious heavy metal stresses limiting plant growth and development. However, the molecular mechanisms underlying Cd-induced root growth inhibition remain unclear. Here, we found that ethylene signaling positively regulates Cd-induced root growth inhibition. Arabidopsis seedlings pretreated with the ethylene precursor 1-aminocyclopropane-1-carboxylic acid exhibited enhanced Cd-induced root growth inhibition; while the addition of the ethylene biosynthesis inhibitor aminoethoxyvinyl glycine decreased Cd-induced root growth inhibition...
June 5, 2018: Plant, Cell & Environment
Miyuki Kusajima, Shuhei Shima, Moeka Fujita, Kiwamu Minamisawa, Fang-Sik Che, Hiromoto Yamakawa, Hideo Nakashita
A bacterial endophyte Azospirillum sp. B510 induces systemic disease resistance in the host without accompanying defense-related gene expression. To elucidate molecular mechanism of this induced systemic resistance (ISR), involvement of ethylene (ET) was examined using OsEIN2-knockdown mutant rice. Rice blast inoculation assay and gene expression analysis indicated that ET signaling is required for endophyte-mediated ISR in rice. ABBREVIATIONS: ACC: 1-aminocyclopropane-1-carboxylic acid; EIN2: ethylene-insensitive protein 2; ET: ethylene; ISR: induced systemic resistance; JA: jasmonic acid; RNAi: RNA interference; SA: salicylic acid; SAR: systemic acquired resistance...
May 30, 2018: Bioscience, Biotechnology, and Biochemistry
Xiaokun Guo, Yong Zhang, Yun Tu, Yongzhong Wang, Wenjing Cheng, Yingwu Yang
Ethylene signaling converges on the ETHYLENE-INSENSITIVE3 (EIN3)/EIN3-like (EIL) transcription factors to regulate a wide range of developmental processes in plants. EBF1/2 (EIN3-binding F-box protein 1 and 2) negatively regulate the ethylene signaling pathway by mediating the degradation of EIN3/EIL proteins. We uncovered previously that SlEBF1 and SlEBF2 are involved in ethylene response, plant senescence, and fruit ripening in tomato. The present study reports on the identification of a novel tomato F-box gene, designated as SlEBF2-like due that its encoded protein is greater similarity to SlEBF2...
July 2018: Plant Science: An International Journal of Experimental Plant Biology
Heng Deng, Julien Pirrello, Yao Chen, Nan Li, Sihua Zhu, Ximena Chirinos, Mondher Bouzayen, Yongsheng Liu, Mingchun Liu
Ethylene is instrumental to climacteric fruit ripening and EIN3 BINDING F-BOX (EBF) proteins have been assigned a central role in mediating ethylene responses by regulating EIN3/EIL degradation in Arabidopsis. However, the role and mode of action of tomato EBFs in ethylene-dependent processes like fruit ripening remains unclear. Two novel EBF genes, SlEBF3 and SlEBF4, were identified in the tomato genome and SlEBF3 displayed a ripening-associated expression pattern suggesting its potential involvement in controlling ethylene response during fruit ripening...
May 23, 2018: Plant Journal: for Cell and Molecular Biology
Rafael Garcia Tavares, Prakash Lakshmanan, Edgar Peiter, Anthony O'Connell, Camila Caldana, Renato Vicentini, José Sérgio Soares, Marcelo Menossi
Sugarcane contributes to more than 70 percent of sugar production and is the second largest feedstock for ethanol production globally. Since sugar accumulates in sugarcane culm, culm biomass and sucrose content are the most commercially important traits. Despite extensive breeding, progress in both cane yield and sugar content remains very slow in most countries. We hypothesize that manipulating the genetic elements controlling culm growth will alter source-sink regulation and help break down the yield barriers...
May 15, 2018: Journal of Experimental Botany
De Peng Yuan, Chong Zhang, Zi Yuan Wang, Li Tian Ya, Xiao Feng Zhu, Yuan Hu Xuan
Rhizoctonia solani causes sheath blight disease in rice; however, the defense mechanism of rice plants against R. solani remains elusive. To analyze the roles of brassinosteroid (BR) and ethylene signaling on rice defense to R. solani, wild-type (WT) rice and several mutants and over-expressing (OX) lines were inoculated with R. solani. Mutants d61-1 and d2 were less susceptible to sheath blight disease, bri1-D was more susceptible, and ravl1 and d61-1/EIL1 Ri5 were similarly susceptible compared to WT. The double mutant ravl1/d61-1 was phenotypically similar to the ravl1 mutant...
May 16, 2018: Phytopathology
Sergi Munné-Bosch, Bárbara Simancas, Maren Müller
Ethylene signaling plays a major role in the regulation of plant growth, but its cross-talk with other phytohormones is still poorly understood. Here, we investigated whether or not a defect in ethylene signaling, particularly in the ETHYLENE INSENSITIVE3 (EIN3) transcription factor, alters plant growth and influences the contents of other phytohormones. With this aim, a hormonal profiling approach using ultrahigh performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS) was used to unravel organ-specific responses (in roots, leaves and fruits) in the ein3-1 mutant and wild-type A...
May 4, 2018: Journal of Plant Physiology
Yichuan Wang, Yusi Ji, Ying Fu, Hongwei Guo
Microtubule reorientation is a long-standing observation that has been implicated in regulating the inhibitory effect of ethylene on axial elongation of plant cells. However, the signaling mechanism underlying ethylene-induced microtubule reorientation has remained elusive. Here, we reveal, by live confocal imaging and kinetic root elongation assays, that the time courses of ethylene-induced microtubule reorientation and root elongation inhibition are highly correlated, and that microtubule reorientation is required for the full responsiveness of root elongation to ethylene treatment...
May 12, 2018: Journal of Integrative Plant Biology
Jinbo Li, Kaixuan Zhang, Yu Meng, Jianping Hu, Mengqi Ding, Jiahui Bian, Mingli Yan, Jianming Han, Meiliang Zhou
Hydroxycinnamic acid amides (HCAAs) are a class of antimicrobial metabolites involved in plant defense against necrotrophic pathogens, including Alternaria brassicicola and Botrytis cinerea. The agmatine coumaroyl transferase (AtACT) is the key enzyme to catalyze the last reaction in the biosynthesis of HCAAs, including p-coumaroylagmatine (CouAgm) and feruloylagmatine in Arabidopsis thaliana. However, it is currently unknown about the regulatory mechanism of the AtACT gene expression. Yeast one-hybrid screening using the AtACT promoter as bait isolated the key positive regulator ORA59 that is involved in jasmonic acid/ethylene (JA/ET) mediated plant defense responses...
May 11, 2018: Plant Journal: for Cell and Molecular Biology
Fred A L Brito, Lucas C Costa, Karla Gasparini, Thaline M Pimenta, Wagner L Araújo, Agustín Zsögön, Dimas M Ribeiro
The tropical forage legume Stylosanthes humilis is naturally distributed in the acidic soils of the tropics. However, data concerning the role of low soil pH in the control of S. humilis seed germination remains limited. Recently, we have demonstrated that acidic soil triggers increased ethylene production during germination of S. humilis seeds, concomitantly with higher root penetration into the soil. Our finding points an important role of low soil pH as a signal allowing penetration of root in the soil through interaction with the ethylene signalling pathway...
May 10, 2018: Plant Signaling & Behavior
Ningxiao Li, Wenzhao Wang, Vasileios Bitas, Krishna Subbarao, Xingzhong Liu, Seogchan Kang
Some volatile compounds (VCs) play critical roles in intra- and inter-species interactions. To investigate roles of VCs in fungal ecology, we characterized how VCs produced by Verticillium, a group of broad host range soilborne fungal pathogens, affect plant growth and development. VCs produced by 19 strains corresponding to 10 species significantly enhanced the growth of Arabidopsis thaliana and Nicotiana benthamiana. Analysis of VCs produced by four species revealed the presence of diverse compounds, including those previously shown to affect plant growth...
May 9, 2018: Molecular Plant-microbe Interactions: MPMI
Jing Dai, Wei Qiu, Nanqi Wang, Hiromi Nakanishi, Yuanmei Zuo
Intercropping is a vital technology in resource-limited agricultural systems with low inputs. Peanut/maize intercropping enhances iron (Fe) nutrition in calcareous soil. In this study, the transcriptome of peanut and maize roots was analyzed by suppression subtractive hybridization (SSH) and microarray analysis separately. We constructed four SSH libraries using the cDNA of peanut roots based on two cropping patterns: monocropping and intercropping, and two growth stages: vegetative stage and reproductive stage...
April 23, 2018: Plant Physiology and Biochemistry: PPB
Kenichi Shibuya
Flower longevity is one of the most important traits for ornamental plants. Ethylene plays a crucial role in flower senescence in some plant species. In several species that show ethylene-dependent flower senescence, genetic modification targeting genes for ethylene biosynthesis or signaling has improved flower longevity. Although little is known about regulatory mechanisms of petal senescence in flowers that show ethylene-independent senescence, a recent study of Japanese morning glory revealed that a NAC transcription factor, EPHEMERAL1 (EPH1), is a key regulator in ethylene-independent petal senescence...
January 2018: Breeding Science
Yueli Tang, Ling Li, Tingxiang Yan, Xueqing Fu, Pu Shi, Qian Shen, Xiaofen Sun, Kexuan Tang
Artemisinin is an important drug for malaria treatment, which is exclusively produced in Artemisia annua . It's important to dissect the regulatory mechanism of artemisinin biosynthesis by diverse plant hormones and transcription factors. Our study shows ethylene, a plant hormone which accelerates flower and leaf senescence and fruit ripening, suppressed the expression of genes encoding three key enzymes ADS, DBR2, CYP71AV1, and a positive regulator AaORA involved in artemisinin biosynthesis. Then we isolated the gene encoding ETHYLENE-INSENSITIVE3 (EIN3), a key transcription factor in ethylene signaling pathway, by screening the transcriptome and genome database from Artemisia annua , named AaEIN3 ...
2018: Frontiers in Plant Science
Fathi Berrabah, Thierry Balliau, El Hosseyn Aït-Salem, Jeoffrey George, Michel Zivy, Pascal Ratet, Benjamin Gourion
Massive intracellular populations of symbiotic bacteria, referred to as rhizobia, are housed in legume root nodules. Little is known about the mechanisms preventing the development of defense in these organs although genes such as SymCRK and DNF2 of the model legume Medicago truncatula are required for this control after rhizobial internalization in host nodule cells. Here we investigated the molecular basis of the symbiotic control of immunity. Proteomic analysis was performed to compare functional (wild-type) and defending nodules (symCRK)...
July 2018: New Phytologist
Qianyi Tao, Huanhuan Niu, Zhongyuan Wang, Wenhui Zhang, Hu Wang, Shenhao Wang, Xian Zhang, Zheng Li
In plants, unisexual flowers derived from developmental sex determination form separate stamens and pistils that facilitate cross pollination. In cucumber and melon, ethylene plays a key role in sex determination. Six sex determination-related genes have been identified in ethylene biosynthesis in these Cucumis species. The interactions among these genes are thought to involve ethylene signaling; however, the underlying mechanism of regulation remains unknown. In this study, hormone treatment and qPCR assays were used to confirm expression of these sex determination-related genes in cucumber and melon is ethylene sensitive...
May 25, 2018: Journal of Experimental Botany
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