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Sarangle Y, Bamel K, Purty RS. Role of acetylcholine and acetylcholinesterase in improving abiotic stress resistance/tolerance. Commun Integr Biol 2024; 17:2353200. [PMID: 38827581 PMCID: PMC11141473 DOI: 10.1080/19420889.2024.2353200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 05/06/2024] [Indexed: 06/04/2024] Open
Abstract
Abiotic stress that plants face may impact their growth and limit their productivity. In response to abiotic stress, several endogenous survival mechanisms get activated, including the synthesis of quaternary amines in plants. Acetylcholine (ACh), a well-known quaternary amine, and its components associated with cholinergic signaling are known to contribute to a variety of physiological functions. However, their role under abiotic stress is not well documented. Even after several studies, there is a lack of a comprehensive understanding of how cholinergic components mitigate abiotic stress in plants. Acetylcholine hydrolyzing enzyme acetylcholinesterase (AChE) belongs to the GDSL lipase/acylhydrolase protein family and has been found in several plant species. Several studies have demonstrated that GDSL members are involved in growth, development, and abiotic stress. This review summarizes all the possible mitigating effects of the ACh-AChE system on abiotic stress tolerance and will try to highlight all the progress made so far in this field.
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Affiliation(s)
- Yashika Sarangle
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, New Delhi, India
| | - Kiran Bamel
- Department of Botany, Shivaji College, University of Delhi, New Delhi, India
| | - Ram Singh Purty
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, New Delhi, India
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Xue P, Chen YY, Wen XX, Wang BF, Yang QQ, Gong K, Kang YW, Sun LP, Yu P, Cao LY, Zhang YX, Zhan XD, Cheng SH. Dissection of Closely Linked Quantitative Trait Locis Controlling Grain Size in Rice. FRONTIERS IN PLANT SCIENCE 2022; 12:804444. [PMID: 35126429 PMCID: PMC8810522 DOI: 10.3389/fpls.2021.804444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/06/2021] [Indexed: 06/14/2023]
Abstract
Grain size is a key constituent of grain weight and appearance in rice. However, insufficient attention has been paid to the small-effect quantitative trait loci (QTLs) on the grain size. In the present study, residual heterozygous populations were developed for mapping two genetically linked small-effect QTLs for grain size. After the genotyping and the phenotyping of five successive generations, qGS7.1 was dissected into three QTLs and two were selected for further analysis. The qTGW7.2a was finally mapped into a 21.10 kb interval containing four annotated candidate genes. Transcript levels assay showed that the expression of the candidates LOC_Os07g39490 and the LOC_Os07g39500 were significantly reduced in the NIL-qTGW7.2aBG1 . The cytological observation indicated that qTGW7.2a regulated the grain width through controlling the cell expansion. Using the same strategy, qTGW7.2b was fine-mapped into a 52.71 kb interval containing eight annotated candidate genes, showing a significant effect on the grain length and width with opposite allelic directions, but little on the grain weight. Our study provides new genetic resources for yield improvement and for fine-tuning of grain size in rice.
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Affiliation(s)
- Pao Xue
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Yu-yu Chen
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
- Department of Resource and Environment, Moutai Institute, Renhuai, China
| | - Xiao-xia Wen
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Bei-fang Wang
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Qin-qin Yang
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Ke Gong
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Yi-wei Kang
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Lian-ping Sun
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Ping Yu
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Li-yong Cao
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Ying-xin Zhang
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Xiao-deng Zhan
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
| | - Shi-hua Cheng
- Zhejiang Key Laboratory of Super Rice Research, State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, China
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Yamamoto K, Momonoki YS. Identification and molecular characterization of propionylcholinesterase, a novel pseudocholinesterase in rice. PLANT SIGNALING & BEHAVIOR 2021; 16:1961062. [PMID: 34334124 PMCID: PMC8525928 DOI: 10.1080/15592324.2021.1961062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 07/21/2021] [Accepted: 07/23/2021] [Indexed: 06/13/2023]
Abstract
Cholinesterase is consisting of acetylcholinesterase (AChE) and pseudocholinesterase in vertebrates and invertebrates. AChE gene has been identified in several plant species, while pseudocholinesterase gene has not yet been found in any plant species. In this study, we report that the AChE gene paralog encodes propionylcholinesterase (PChE), a pseudocholinesterase in rice. PChE was found to be located adjacent to AChE (Os07g0586200) on rice chromosome 7 and designated as Os07g0586100. Phylogenetic tree analysis showed a close relationship between rice AChE and PChE. PChE-overexpressing rice had higher hydrolytic activity toward propionylthiocholine than acetylthiocholine and showed extremely low activity against butyrylthiocholine. Therefore, the PChE gene product was characterized as a propionylcholinesterase, a pseudocholinesterase. The rice PChE displayed lower sensitivity to the cholinesterase inhibitor, neostigmine bromide, than electric eel, maize, and rice AChEs. The recombinant PChE functions as a 171 kDa homotetramer. PChE was expressed during the later developmental stage, and it was found be localized in the extracellular spaces of the rice leaf tissue. These results suggest that the rice plant possesses PChE, which functions in the extracellular spaces at a later developmental stage. To the best of our knowledge, this study provides the first direct evidence and molecular characterization of PChE in plants.
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Affiliation(s)
- Kosuke Yamamoto
- Department of Molecular Microbiology, Faculty of Life Sciences, Tokyo University of Agriculture, Tokyo, Japan
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Sepčić K, Sabotič J, A. Ohm R, Drobne D, Jemec Kokalj A. First evidence of cholinesterase-like activity in Basidiomycota. PLoS One 2019; 14:e0216077. [PMID: 31039204 PMCID: PMC6490906 DOI: 10.1371/journal.pone.0216077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 04/13/2019] [Indexed: 11/28/2022] Open
Abstract
Cholinesterases (ChE), the enzymes whose primary function is the hydrolysis of choline esters, are widely expressed throughout the nature. Although they have already been found in plants and microorganisms, including ascomycete fungi, this study is the first report of ChE-like activity in fungi of the phylum Basidiomycota. This activity was detected in almost a quarter of the 45 tested aqueous fungal extracts. The ability of these extracts to hydrolyse acetylthiocholine was about ten times stronger than the hydrolytic activity towards butyrylthiocholine and propionylthiocholine. In-gel detection of ChE-like activity with acetylthiocholine indicated a great variability in the characteristics of these enzymes which are not characterized as vertebrate-like based on (i) differences in inhibition by excess substrate, (ii) susceptibility to different vertebrate acetylcholinesterase and butyrylcholinesterase inhibitors, and (iii) a lack of orthologs using phylogenetic analysis. Limited inhibition by single inhibitors and multiple activity bands using in-gel detection indicate the presence of several ChE-like enzymes in these aqueous extracts. We also observed inhibitory activity of the same aqueous mushroom extracts against insect acetylcholinesterase in 10 of the 45 samples tested; activity was independent of the presence of ChE-like activity in extracts. Both ChE-like activities with different substrates and the ability of extracts to inhibit insect acetylcholinesterase were not restricted to any fungal family but were rather present across all included Basidiomycota families. This study can serve as a platform for further research regarding ChE activity in mushrooms.
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Affiliation(s)
- Kristina Sepčić
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Jerica Sabotič
- Department of Biotechnology, Jožef Stefan Institute, Ljubljana, Slovenia
| | - Robin A. Ohm
- Department of Biology, Faculty of Science, Utrecht University, Padualaan, Utrecht, The Netherlands
| | - Damjana Drobne
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Anita Jemec Kokalj
- Department of Biology, Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia
- * E-mail:
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Yamamoto K, Sakamoto H, Momonoki YS. Altered expression of acetylcholinesterase gene in rice results in enhancement or suppression of shoot gravitropism. PLANT SIGNALING & BEHAVIOR 2016; 11:e1163464. [PMID: 26979939 PMCID: PMC4883896 DOI: 10.1080/15592324.2016.1163464] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 03/03/2016] [Accepted: 03/04/2016] [Indexed: 05/23/2023]
Abstract
Acetylcholinesterase (AChE), an acetylcholine-hydrolyzing enzyme, exists widely in plants, although its role in plant signal transduction is still unclear. We have hypothesized that the plant AChE regulates asymmetric distribution of hormones and substrates due to gravity stimulus, based on indirect pharmacological experiments using an AChE inhibitor. As a direct evidence for this hypothesis, our recent study has shown that AChE overexpression causes an enhanced gravitropic response in rice seedlings and suggested that the function of the rice AChE relates to the promotion of shoot gravitropism in the seedlings. Here, we report that AChE suppression inhibited shoot gravitropism in rice seedlings, as supportive evidence demonstrating the role of AChE as a positive regulator of shoot gravitropic response in plants.
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Affiliation(s)
- Kosuke Yamamoto
- Faculty of Bioindustry, Tokyo University of Agriculture, Yasaka, Abashiri, Hokkaido, Japan
| | - Hikaru Sakamoto
- Faculty of Bioindustry, Tokyo University of Agriculture, Yasaka, Abashiri, Hokkaido, Japan
| | - Yoshie S. Momonoki
- Faculty of Bioindustry, Tokyo University of Agriculture, Yasaka, Abashiri, Hokkaido, Japan
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