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Lee, Sichul
식물 노화·수명 연구단
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OsASN1 Overexpression in Rice Increases Grain Protein Content and Yield under Nitrogen-Limiting Conditions

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Title
OsASN1 Overexpression in Rice Increases Grain Protein Content and Yield under Nitrogen-Limiting Conditions
Author(s)
Sichul Lee; Joonheum Park; Jinwon Lee; Dongjin Shin; Anne Marmagne; Pyung Ok Lim; Céline Masclaux-Daubresse; Gynheung An; Hong Gil Nam
Subject
Asparagine synthetase 1, ; Grain quality and yield, ; Knockout, ; Nitrogen use efficiency, ; Overexpression, ; Rice
Publication Date
2020-07
Journal
Plant & cell physiology, v.61, no.7, pp.1309 - 1320
Publisher
OXFORD UNIV PRESS
Abstract
© The Author(s) 2020. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.Nitrogen (N) is a major limiting factor affecting crop yield in unfertilized soil. Thus, cultivars with a high N use efficiency (NUE) and good grain protein content (GPC) are needed to fulfill the growing food demand and to reduce environmental burden. This is especially true for rice (Oryza sativa L.) that is cultivated with a high input of N fertilizer and is a primary staple food crop for more than half of the global population. Here, we report that rice asparagine synthetase 1 (OsASN1) is required for grain yield and grain protein contents under both N-sufficient (conventional paddy fields) and N-limiting conditions from analyses of knockout mutant plants. In addition, we show that overexpression (OX) of OsASN1 results in better nitrogen uptake and assimilation, and increased tolerance to N limitation at the seedling stage. Under field conditions, the OsASN1 OX rice plants produced grains with increased N and protein contents without yield reduction compared to wild-type (WT) rice. Under N-limited conditions, the OX plants displayed increased grain yield and protein content with enhanced photosynthetic activity compared to WT rice. Thus, OsASN1 can be an effective target gene for the development of rice cultivars with higher grain protein content, NUE, and grain yield under N-limiting conditions
URI
https://pr.ibs.re.kr/handle/8788114/7754
DOI
10.1093/pcp/pcaa060
ISSN
1471-9053
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > 1. Journal Papers (저널논문)
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