A mutation in <I>UVI4</I> gene, which promotes the progression of endoreduplication, confers an increased tolerance against UV-B light
-
- Hase Yoshihiro
- Japan Atomic Energy Agency
-
- Trung Khuat Huu
- Japan Atomic Energy Agency Agricultural Genetics Institute
-
- Matsunaga Tsukasa
- Graduate School of Natural Science & Technology, Kanazawa Univ.
-
- Tanaka Atsushi
- Japan Atomic Energy Agency
Bibliographic Information
- Other Title
-
- UV-Bに超耐性を示す<I>uvi4</I>変異体の解析と遺伝子の単離
Abstract
We have isolated and characterized an ultraviolet-B resistant mutant, uvi4, of Arabidopsis. The fresh weight of uvi4 plants grown under supplemental UV-B light was more than twice of that of the wild type. No significant difference was found in the ability to repair the UV-B-induced cyclobutane pyrimidine dimmers or in the amount of UV-B absorptive compounds, both of which are well known factors that contribute to UV sensitivity. Positional cloning revealed that the UVI4 gene encodes a novel basic protein of unknown function. The UVI4 gene is expressed mainly in actively dividing cells. We found that the hypocotyls cells in uvi4 undergo one extra round of endoreduplication. The uvi4 mutation also promoted the progression of endoreduplication during leaf development. Tetraploid Arabidopsis was hyperresistant to UV-B than diploid Arabidopsis. These results suggest that the enhanced polyploidization is responsible for the increased UV-B tolerance of the uvi4.
Journal
-
- Plant and Cell Physiology Supplement
-
Plant and Cell Physiology Supplement 2006 (0), 746-746, 2006
The Japanese Society of Plant Physiologists
- Tweet
Details 詳細情報について
-
- CRID
- 1390001205631997952
-
- NII Article ID
- 130006993464
-
- Data Source
-
- JaLC
- CiNii Articles
-
- Abstract License Flag
- Disallowed