Extended leaf longevity in the ore4-1 mutant of Arabidopsis with a reduced expression of a plastid ribosomal protein gene
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SCOPUS
- Title
- Extended leaf longevity in the ore4-1 mutant of Arabidopsis with a reduced expression of a plastid ribosomal protein gene
- Authors
- Woo, HR; Goh, CH; Park, JH; de la Serve, BT; Kim, JH; Park, YI; Nam, HG
- Date Issued
- 2002-08
- Publisher
- BLACKWELL PUBLISHING LTD
- Abstract
- The longevity of plant leaf organs is genetically determined. However, the molecular mechanisms underlying the control of longevity are still largely unknown. Here, we describe a T-DNA-insertional mutation of Arabidopsis thaliana that confers extended leaf longevity. The mutation, termed ore4-1 , delays a broad spectrum of age-dependent leaf senescence, but has little effect on leaf senescence artificially induced by darkness, abscisic acid (ABA), methyl jasmonate (MeJA), or ethylene. The T-DNA was inserted within the promoter region of the plastid ribosomal small subunit protein 17 (PRPS17 ) gene, and this insertion dramatically reduced PRPS17 mRNA expression. In the ore4-1 mutant, the leaf growth rate is decreased, while the maturation timing is similar to that of wild-type. In addition, the activity of the photosystem I (PSI) is significantly reduced in the ore4-1 mutant, as compared to wild-type. Thus, the ore4-1 mutation results in a deficiency in various chloroplast functions, including photosynthesis, which may decrease leaf growth. Our results suggest a possible link between reduced metabolism and extended longevity of the leaf organs in the ore4-1 mutation.
- Keywords
- Arabidopsis thaliana; ore4; age; leaf senescence; plastid ribosomal protein 17; photosystem I; CAENORHABDITIS-ELEGANS; STRESS RESISTANCE; ABSCISIC-ACID; LIFE-SPAN; SENESCENCE; CHLOROPHYLL; METABOLISM; THALIANA; LEAVES; IDENTIFICATION
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/18956
- DOI
- 10.1046/j.1365-313X.2002.01355.x
- ISSN
- 0960-7412
- Article Type
- Article
- Citation
- PLANT JOURNAL, vol. 31, no. 3, page. 331 - 340, 2002-08
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