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Iglesias-Moya J, Abreu AC, Alonso S, Torres-García MT, Martínez C, Fernández I, Jamilena M. Physiological and metabolomic responses of the ethylene insensitive squash mutant etr2b to drought. Plant Sci 2023; 336:111853. [PMID: 37659732 DOI: 10.1016/j.plantsci.2023.111853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 07/24/2023] [Accepted: 08/29/2023] [Indexed: 09/04/2023]
Abstract
The squash gain-of-function mutant etr2b disrupts the ethylene-binding domain of ethylene receptor CpETR2B, conferring partial ethylene insensitivity, changes in flower and fruit development, and enhanced salt tolerance. In this paper, we found that etr2b also confers a growth advantage as well as a physiological and metabolomic response that make the mutant better adapted to drought. Mutant plants had a higher root and leaf biomass than WT under both well-watered and drought conditions, but the reduction in growth parameters in response to drought was similar in WT and etr2b. Water deficit reduced all gas-exchange parameters in both WT and etr2b, but under moderate drought the mutant increased photosynthesis rate in comparison with control conditions, and showed a higher leaf CO2 concentration, transpiration rate, and stomata conductance than WT. The response of etr2b to drought indicates that ethylene is a negative regulator of plant growth under both control and drought. Since etr2b increased ABA content in well-watered plant, but prevented the induction of ABA production in response to drought, it is likely that the etr2b response under drought is not mediated by ABA. A 1H NMR metabolomic analysis revealed that etr2b enhances the accumulation of osmolytes (soluble sugars and trigonelline), unsaturated and polyunsaturated fatty acids, and phenolic compounds under drought, concomitantly with a reduction of malic- and fumaric-acid. The role of CpETR2B and ethylene in the regulation of these drought-protective metabolites is discussed.
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Affiliation(s)
- Jessica Iglesias-Moya
- Department of Biology and Geology, CIAIMBITAL Research Centers. University of Almería, 04120 Almería, Spain
| | - Ana Cristina Abreu
- Department of Chemistry and Physics, CAESCG Research Centers. University of Almería, 04120 Almería, Spain
| | - Sonsoles Alonso
- Department of Biology and Geology, CIAIMBITAL Research Centers. University of Almería, 04120 Almería, Spain
| | - María Trinidad Torres-García
- Department of Biology and Geology, CIAIMBITAL Research Centers. University of Almería, 04120 Almería, Spain; CAESCG Research Centers. University of Almería, 04120 Almería, Spain
| | - Cecilia Martínez
- Department of Biology and Geology, CIAIMBITAL Research Centers. University of Almería, 04120 Almería, Spain
| | - Ignacio Fernández
- Department of Chemistry and Physics, CAESCG Research Centers. University of Almería, 04120 Almería, Spain.
| | - Manuel Jamilena
- Department of Biology and Geology, CIAIMBITAL Research Centers. University of Almería, 04120 Almería, Spain.
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2
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Wei J, Wu XT, Li XY, Soppe WJJ, Cao H, Liu YX. Overexpression of Taetr1-1 promotes enhanced seed dormancy and ethylene insensitivity in wheat. Planta 2023; 258:56. [PMID: 37522994 DOI: 10.1007/s00425-023-04211-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Accepted: 07/20/2023] [Indexed: 08/01/2023]
Abstract
MAIN CONCLUSION Taetr1-1 can promote enhanced seed dormancy and ethylene insensitivity in wheat, indicating a conserved function of ETR1 in regulating seed dormancy. Lots of wheat cultivars have weak dormant seed. Weak seed dormancy can cause pre-harvest sprouting (PHS) in grain which significantly reduces grain yield and quality. The mining of causal genes of PHS resistance will serve to enhance breeding selection and cultivar development. In a previous study in Arabidopsis, we identified reduced dormancy 3 as a loss-of-function mutant of the ethylene receptor 1 (ETR1), which can control seed dormancy through the ERF12-TPL-DOG1 pathway. However, it is unknown whether ETR1 also functions in the regulation of wheat seed dormancy. To identify the regulatory role of ETR1 in wheat, we cloned TaETR1 and overexpressed the gain-of-function mutant Taetr1-1. The result indicated that overexpression of Taetr1-1 can promote enhanced seed dormancy and ethylene insensitivity in wheat. This study contributed to our understanding of the molecular basis for the regulation of wheat PHS resistance.
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Affiliation(s)
- Jun Wei
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xing-Ting Wu
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao-Ying Li
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | | | - Hong Cao
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
| | - Yong-Xiu Liu
- Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
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Thanomchit K, Imsabai W, Burns P, McAtee PA, Schaffer RJ, Allan AC, Ketsa S. Differential expression of ethylene biosynthetic and receptor genes in pollination-induced senescence of Dendrobium flowers. Plant Physiol Biochem 2022; 188:38-46. [PMID: 35981438 DOI: 10.1016/j.plaphy.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 07/29/2022] [Accepted: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Following successful pollination, Dendrobium orchid flowers rapidly undergo senescence. In Dendrobium cv. Khao Chaimongkol, compatible pollination resulted in faster ethylene production and more rapid development of senescence symptoms, such as drooping, epinasty, venation and yellowing, compared with non-pollinated controls or pollination with incompatible pollinia. The DenACS1 and DenACO1 genes in the perianth of florets that had been pollinated with compatible pollinia were expressed more highly than those in non-pollinated open florets. Incompatible pollinia reduced the expression of DenACS1 and DenACO1 genes in the perianth. Transcript levels of the ethylene receptor gene DenERS1 and signaling genes DenEIL1 and DenERF1 showed differential spatial regulation with greater expression in the perianth than in the column plus ovary following compatible pollination. Compatible pollinia increased ethylene production concomitant with premature senescence and the increased expression of the DenACS1 and DenACO1 genes, and suppressed the ethylene receptor gene DenERS1, whereas incompatible pollinia did not stimulate ethylene production nor induce premature senescence but induced higher expression of DenERS1 both in the perianth and in the column plus ovary. These results suggest that the increased ethylene production in open florets pollinated with compatible pollen was partially due to an increase in the expression of DenACS1 and DenACO1 genes. The compatible pollinia induced a negative regulation of DenERS1 which may play an important role in ethylene perception and in modulating ethylene signaling transduction during pollinia-induced flower senescence.
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Affiliation(s)
- Kanokwan Thanomchit
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand
| | - Wachiraya Imsabai
- Department of Horticulture, Faculty of Agriculture at Kamphaeng Saen Campus, Kasetsart University, Nakhon Pathom, 73140, Thailand
| | - Parichart Burns
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, PathumThani, 12120, Thailand
| | - Peter A McAtee
- Plant and Food Research Institute, Mt Albert Research Center, Private Bag 92019, Auckland, 1142, New Zealand
| | - Robert J Schaffer
- Plant and Food Research Institute, Mt Albert Research Center, Private Bag 92019, Auckland, 1142, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Andrew C Allan
- Plant and Food Research Institute, Mt Albert Research Center, Private Bag 92019, Auckland, 1142, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - Saichol Ketsa
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok, 10900, Thailand; Academy of Science, The Royal Society of Thailand, Dusit, Bangkok, 10300, Thailand.
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Cai G, Wang Y, Yan W, Luan S, Lan W. Choline transporter-like 1 (CTL1) positively regulates apical hook development in etiolated Arabidopsis seedlings. Biochem Biophys Res Commun 2020; 525:491-497. [PMID: 32111354 DOI: 10.1016/j.bbrc.2020.02.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 02/19/2020] [Indexed: 11/30/2022]
Abstract
Ethylene is a gaseous phytohormone that is perceived by two-component histidine kinase-type receptors. Recent studies identified choline transporter-like 1 (CTL1) essential for Arabidopsis growth and development, including apical hook development in the etiolated seedlings. Here, we report that CTL1 contributes to apical hook development by enhancing ethylene response. The expression of CTL1 was highly correlated with the intensity of ethylene response and was enriched in the apical hook, cotyledon tip and hypocotyl. Genetic analysis showed that the dark-grown ctl1 mutant displayed a defect in ethylene-induced apical hook development as compared with the wild type. Accordingly, the expression of ethylene signaling reporter EBS::GUS in ctl1 mutant was greatly reduced in leaves, apical hook, hypocotyl and root, suggesting that the disruption of CTL1 impairs the ethylene signaling. Furthermore, protein-protein interaction assays demonstrated that CTL1 may interact with ethylene receptors, including ETR1, ETR2, ERS1, ERS2. Importantly, the abundance of CTL1 was diminished when ETR1 was disrupted upon ethylene response. Taken together, our results suggest that CTL1 functions as a positive regulator in ethylene signaling which in turn contributes to apical hook development of etiolated plant seedlings.
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Affiliation(s)
- Guohua Cai
- State Key Laboratory for Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210093, PR China
| | - Yuan Wang
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai, 201602, PR China
| | - Wenwen Yan
- State Key Laboratory for Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210093, PR China
| | - Sheng Luan
- Department of Plant and Microbial Biology, University of California, Berkeley, CA, 94720, USA.
| | - Wenzhi Lan
- State Key Laboratory for Pharmaceutical Biotechnology, College of Life Sciences, Nanjing University, Nanjing, 210093, PR China.
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Liu H, Hao N, Jia Y, Liu X, Ni X, Wang M, Liu W. The ethylene receptor regulates Typha angustifolia leaf aerenchyma morphogenesis and cell fate. Planta 2019; 250:381-390. [PMID: 31062160 DOI: 10.1007/s00425-019-03177-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 04/26/2019] [Indexed: 05/14/2023]
Abstract
Ethylene receptor is crucial for PCD and aerenchyma formation in Typha angustifolia leaves. Not only does it receive and deliver the ethylene signal, but it probably can determine the cell fate during aerenchyma morphogenesis, which is due to the receptor expression quantity. Aquatic plant oxygen delivery relies on aerenchyma, which is formed by a programmed cell death (PCD) procedure. However, cells in the outer edge of the aerenchyma (palisade cells and septum cells) remain intact, and the mechanism is unclear. Here, we offer a hypothesis: cells that have a higher content of ethylene receptors do not undergo PCD. In this study, we investigated the leaf aerenchyma of the aquatic plant Typha angustifolia. Ethephon and pyrazinamide (PZA, an inhibitor of ACC oxidase) were used to confirm that ethylene is an essential hormone for PCD of leaf aerenchyma cells in T. angustifolia. That the ethylene receptor was an indispensable factor in this PCD was confirmed by 1-MCP (an inhibitor of the ethylene receptor) treatment. Although PCD can be avoided by blocking the ethylene receptor, excessive ethylene receptors also protect cells from PCD. TaETR1, TaETR2 and TaEIN4 in the T. angustifolia leaf were detected by immunofluorescence (IF) using polyclonal antibodies. The result showed that the content of ethylene receptors in PCD-unsusceptible cells was 4-14 times higher than that one in PCD-susceptible cells, suggesting that PCD-susceptible cells undergo the PCD programme, while PCD-unsusceptible cells do not due to the content difference in the ethylene receptor in different cells. A higher level of ethylene receptor content makes the cells insensitive to ethylene, thereby avoiding cell death and degradation.
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Affiliation(s)
- Huidong Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, 710069, China
| | - Nan Hao
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, 710069, China
| | - Yuhuan Jia
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, 710069, China
| | - Xingqian Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, 710069, China
| | - Xilu Ni
- State Key Laboratory of Seedling Bioengineering, Ningxia Forestry Institute, Yinchuan, 750004, China
| | - Meng Wang
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, 710069, China
| | - Wenzhe Liu
- Key Laboratory of Resource Biology and Biotechnology in Western China, Northwest University, Ministry of Education, Xi'an, 710069, China.
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6
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Mubarok S, Hoshikawa K, Okabe Y, Yano R, Tri MD, Ariizumi T, Ezura H. Evidence of the functional role of the ethylene receptor genes SlETR4 and SlETR5 in ethylene signal transduction in tomato. Mol Genet Genomics 2018; 294:301-313. [PMID: 30382349 DOI: 10.1007/s00438-018-1505-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 10/21/2018] [Indexed: 12/24/2022]
Abstract
Ethylene receptors are key factors for ethylene signal transduction. In tomato, six ethylene receptor genes (SlETR1-SlETR6) have been identified. Mutations in different ethylene receptor genes result in different phenotypes that are useful for elucidating the roles of each gene. In this study, we screened mutants of two ethylene receptor genes, SLETR4 and SLETR5, from a Micro-Tom mutant library generated by TILLING. We identified two ethylene receptor mutants with altered phenotypes and named them Sletr4-1 and Sletr5-1. Sletr4-1 has a mutation between the transmembrane and GAF domains, while Sletr5-1 has a mutation within the GAF domain. Sletr4-1 showed increased hypocotyl and root lengths, compared to those of wild type plants, under ethylene exposure. Moreover, the fruit shelf life of this mutant was extended, titratable acidity was increased and total soluble solids were decreased, suggesting a reduced ethylene sensitivity. In contrast, in the absence of exogenous ethylene, the hypocotyl and root lengths of Sletr5-1 were shorter than those of the wild type, and the fruit shelf life was shorter, suggesting that these mutants have increased ethylene sensitivity. Gene expression analysis showed that SlNR was up-regulated in the Sletr5-1 mutant line, in contrast to the down-regulation observed in the Sletr4-1 mutant line, while the down-regulation of SlCTR1, SlEIN2, SlEIL1, SlEIL3, and SlERF.E4 was observed in Sletr4-1 mutant allele, suggesting that these two ethylene receptors have functional roles in ethylene signalling and demonstrating, for the first time, a function of the GAF domain of ethylene receptors. These results suggest that the Sletr4-1 and Sletr5-1 mutants are useful for elucidating the complex mechanisms of ethylene signalling through the analysis of ethylene receptors in tomato.
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Affiliation(s)
- Syariful Mubarok
- Department of Agronomy, Faculty of Agriculture, Padjadjaran University, Bandung, 45363, Indonesia.,Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan
| | - Ken Hoshikawa
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan.,Tsukuba Plant Innovation Research Center, University of Tsukuba, Tsukuba, 305-8572, Japan
| | - Yoshihiro Okabe
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan.,Tsukuba Plant Innovation Research Center, University of Tsukuba, Tsukuba, 305-8572, Japan
| | - Ryoichi Yano
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan
| | | | - Tohru Ariizumi
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan.,Tsukuba Plant Innovation Research Center, University of Tsukuba, Tsukuba, 305-8572, Japan
| | - Hiroshi Ezura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Tsukuba, 305-8572, Japan. .,Tsukuba Plant Innovation Research Center, University of Tsukuba, Tsukuba, 305-8572, Japan.
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7
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Li C, Li C, Wang B, Zhang R, Fu K, Gale WJ, Li C. Programmed cell death in wheat (Triticum aestivum L.) endosperm cells is affected by drought stress. Protoplasma 2018; 255:1039-1052. [PMID: 29380071 DOI: 10.1007/s00709-018-1203-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 01/08/2018] [Indexed: 05/28/2023]
Abstract
Drought frequently occurs during wheat (Triticum aestivum L.) grain filling. The objectives of this study were (i) to investigate the effect of post-anthesis drought on programmed cell death (PCD) in wheat endosperm cells and (ii) to examine the role of ethylene (ETH) receptors and abscisic acid (ABA) in regulating wheat endosperm PCD. Two winter wheat cultivars ('Xindong 18' and 'Xindong 22') were used in this study. Grain samples were collected from normal and drought stressed plants at 5-day intervals between 5 and 35 days post-anthesis. The samples were then compared with respect to cell viability, nuclear morphometry, cell ultrastructure, DNA integrity, nucleic acid content, and nuclease activity. Analysis was also conducted about gene transcripts related to PCD, ETH receptors, and ABA biosynthesis and degradation. Drought stress reduced cell viability, accelerated nuclear deformation, and increased mitochondrial dissolution. The activity of nucleic acid hydrolase was greater, and the nucleic acid concentrations were less in the drought treatments than in the control. As a result, the peak in DNA fragmentation occurred earlier in the drought treatment. Drought stress significantly increased the expression of four genes related to ABA (nced1, nced2, ao1, ao2). In contrast, drought significantly reduced the expression of four genes related to ETH receptors (ers1, ers2 etr1, etr2) and one gene related to PCD (dad1). In summary, the results indicated that drought stress caused PCD to occur earlier in the endosperm of winter wheat.
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Affiliation(s)
- Chao Li
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China
| | - Cheng Li
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China
| | - Bingbing Wang
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China
| | - Runqi Zhang
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China
| | - Kaiyong Fu
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China
| | - William J Gale
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China
| | - Chunyan Li
- College of Agriculture/The Key Laboratory of Oasis Eco-agriculture, Xinjiang Production and Construction Group, Shihezi University, Shihezi, Xinjiang, 832000, People's Republic of China.
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8
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Thongkum M, Imsabai W, Burns P, McAtee PA, Schaffer RJ, Allan AC, Ketsa S. The effect of 1-methylcyclopropene (1-MCP) on expression of ethylene receptor genes in durian pulp during ripening. Plant Physiol Biochem 2018; 125:232-238. [PMID: 29475089 DOI: 10.1016/j.plaphy.2018.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/03/2018] [Accepted: 02/05/2018] [Indexed: 05/11/2023]
Abstract
Rapid fruit ripening is a significant problem that limits the shelf life of durian, with ethylene having a major impact on the regulation of this event. Durian treated with ethephon ripened 3 d after treatment with increased pulp total soluble solids, ethylene production of the whole fruit and decreased pulp firmness compared to the control fruit. 1-MCP treatment delayed ripening by up to 9 d with inhibited accumulation of total soluble solids, color change, softening and ethylene production. Genes related to ethylene perception (DzETR1 and DzETR2) and the signaling pathway (DzCTR1, DzEIL1 and DzEIL2) in the pulp were investigated during this process, using qPCR to quantify changes in gene transcription. All candidate genes were significantly up-regulated in ripening durian pulp. Ethephon treatment increased the expression of DzETR1 and DzETR2 genes, while expression of DzCTR1, DzEIL1 and DzEIL2 were slightly affected. 1-MCP treatment significantly inhibited the expression of the DzETR2 and DzEIL1 genes. The promoters of DzETR2 genes were isolated and their activation by fruit transcription factors studied using transient expression in tobacco leaves. It was found that members of the kiwifruit and apple EIL1, EIL2 and EIL3 genes strongly activated the DzETR2 promoter. These results suggest that ethylene-induced ripening of durian is via the regulation of DzETR2 by EIL transcription factors.
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Affiliation(s)
- Monthathip Thongkum
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand
| | - Wachiraya Imsabai
- Department of Horticulture, Faculty of Agriculture at Kamphaeng Saen Campus, Kasetsart University, Nakhon Pathom 73140, Thailand
| | - Parichart Burns
- National Center for Genetic Engineering and Biotechnology (BIOTEC), Thailand Science Park, PathumThani 12120, Thailand
| | - Peter A McAtee
- Plant and Food Research Institute, Mt Albert Research Centre, Private Bag 92169, Auckland, New Zealand
| | - Robert J Schaffer
- Plant and Food Research Institute, Mt Albert Research Centre, Private Bag 92169, Auckland, New Zealand
| | - Andrew C Allan
- Plant and Food Research Institute, Mt Albert Research Centre, Private Bag 92169, Auckland, New Zealand; School of Biological Sciences, University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Saichol Ketsa
- Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand; Academy of Science, The Royal Society, Dusit, Bangkok 10300, Thailand.
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9
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Gao Z, Schaller GE. Analysis of Ethylene Receptor Interactions by Co-immunoprecipitation Assays. Methods Mol Biol 2017; 1573:101-12. [PMID: 28293843 DOI: 10.1007/978-1-4939-6854-1_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Ethylene receptors are predominantly localized to the endoplasmic reticulum (ER) membrane, and coordinate ethylene signal output through protein-protein interactions with each other and additional signaling components. Here, we describe a co-immunoprecipitation (Co-IP) assay based on the use of the Tandem Affinity Purification (TAP) tag to examine the interactions of ethylene receptors in plant extracts. Human IgG-agarose beads are used to pull down TAP-tagged versions of the protein of interest from detergent extracts of Arabidopsis membranes, and the precipitate then is analyzed immunologically for co-purification of the ethylene receptors. This method has been successfully used to examine interactions of the receptors with each other as well as with the Raf-like kinase CTR1.
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10
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Abstract
Plant ethylene receptors bind ethylene with high affinity. Most of the characterization of ethylene binding to the receptors has been carried out using a radioligand-binding assay on functional receptors expressed in yeast. In this chapter, we describe methods for expressing ethylene receptors in yeast and conducting ethylene-binding assays on intact yeast and yeast membranes. The ethylene-binding assays can be modified to analyze ethylene binding to intact plants and other organisms as well as membranes isolated from any biological source.
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Affiliation(s)
- Brad M Binder
- Department of Biochemistry & Cellular and Molecular Biology, University of Tennessee, M407 Walters Life Sciences, 1414 Cumberland Ave., Knoxville, TN, 37996, USA.
| | - G Eric Schaller
- Department of Biological Sciences, Dartmouth College, Hanover, NH, 03755, USA
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Cao YR, Chen HW, Li ZG, Tao JJ, Ma B, Zhang WK, Chen SY, Zhang JS. Tobacco ankyrin protein NEIP2 interacts with ethylene receptor NTHK1 and regulates plant growth and stress responses. Plant Cell Physiol 2015; 56:803-18. [PMID: 25634961 DOI: 10.1093/pcp/pcv009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 01/18/2015] [Indexed: 12/16/2023]
Abstract
Ethylene is a gaseous hormone that regulates many processes involved in plant growth, development and stress responses. Previously, we found that the tobacco ethylene receptor NTHK1 (Nicotiana tabacum histidine kinase 1) promotes seedling growth and affects plant salt stress responses. In this study, NTHK1 ethylene receptor-interacting protein 2 (NEIP2) was identified and further characterized in relation to these processes. NEIP2 contains three ankyrin repeats that mediate an interaction with NTHK1 as demonstrated by yeast two-hybrid, glutathione S-transferase (GST) pull-down and co-immunoprecipitation assays. NTHK1 phosphorylates NEIP2 in vitro. Salt stress and ethylene treatment induce NEIP2 accumulation in the first few hours and then the NEIP2 can be phosphorylated in planta. The overexpression of NTHK1 enhances NEIP2 accumulation in the presence of ethylene and salt stress. NEIP2 overexpression promotes plant growth but reduces ethylene responses, which is consistent with the functions of NTHK1. Additionally, NEIP2 improves plant performance under salt and oxidative stress. These results suggest that ethylene-induced NEIP2 probably acts as a brake to reduce ethylene response but resumes growth through interaction with NTHK1. Manipulation of NEIP2 may be beneficial for crop improvement.
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Affiliation(s)
- Yang-Rong Cao
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China These authors contributed equally to this work. Present address: Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Hao-Wei Chen
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China These authors contributed equally to this work
| | - Zhi-Gang Li
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China These authors contributed equally to this work
| | - Jian-Jun Tao
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Biao Ma
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Wan-Ke Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Shou-Yi Chen
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jin-Song Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
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Thongkum M, Burns P, Bhunchoth A, Warin N, Chatchawankanphanich O, van Doorn WG. Ethylene and pollination decrease transcript abundance of an ethylene receptor gene in Dendrobium petals. J Plant Physiol 2015; 176:96-100. [PMID: 25590685 DOI: 10.1016/j.jplph.2014.12.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 12/09/2014] [Accepted: 12/10/2014] [Indexed: 05/08/2023]
Abstract
We studied the expression of a gene encoding an ethylene receptor, called Ethylene Response Sensor 1 (Den-ERS1), in the petals of Dendrobium orchid flowers. Transcripts accumulated during the young floral bud stage and declined by the time the flowers had been open for several days. Pollination or exposure to exogenous ethylene resulted in earlier flower senescence, an increase in ethylene production and a lower Den-ERS1 transcript abundance. Treatment with 1-methylcyclopropene (1-MCP), an inhibitor of the ethylene receptor, decreased ethylene production and resulted in high transcript abundance. The literature indicates two kinds of ethylene receptor genes with regard to the effects of ethylene. One group shows ethylene-induced down-regulated transcription, while the other has ethylene-induced up-regulation. The present gene is an example of the first group. The 5' flanking region showed binding sites for Myb and myb-like, homeodomain, MADS domain, NAC, TCP, bHLH and EIN3-like transcription factors. The binding site for the EIN3-like factor might explain the ethylene effect on transcription. A few other transcription factors (RAV1 and NAC) seem also related to ethylene effects.
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Affiliation(s)
- Monthathip Thongkum
- Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand; Center of Excellence on Agricultural Biotechnology (AG-BIO/PERDO-CHE), Bangkok 10900, Thailand.
| | - Parichart Burns
- Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand; Center of Excellence on Agricultural Biotechnology (AG-BIO/PERDO-CHE), Bangkok 10900, Thailand; National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Anjana Bhunchoth
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Nuchnard Warin
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Orawan Chatchawankanphanich
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Thanon Phahonyothin, Tambon Khlong Nueng, Amphoe Khlong Luang, Pathum Thani 12120, Thailand
| | - Wouter G van Doorn
- Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA
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