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Characterization and Map-Based Cloning of the Novel Rice Yellow Leaf Mutant yl3

한국식물학회지 2021년 64권 1호 p.35 ~ 44
Liu Xi, Huang Qian Qian, Yang Yan Rong, Tang Jiayu, Zhao Yanan, Zhang Ji,
소속 상세정보
 ( Liu Xi ) - Huaiyin Normal University Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake
 ( Huang Qian Qian ) - Huaiyin Normal University Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake
 ( Yang Yan Rong ) - Huaiyin Normal University Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake
 ( Tang Jiayu ) - Huaiyin Normal University Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake
 ( Zhao Yanan ) - Huaiyin Normal University Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake
 ( Zhang Ji ) - Huaiyin Normal University Jiangsu Key Laboratory for Eco-Agricultural Biotechnology Around Hongze Lake

Abstract


Chlorophyll (Chl) is an essential molecule for harvesting light energy in photosynthetic organisms. We isolated yellow leaf 3 (yl3), a rice Chl-deficient mutant, which showed yellow leaves with decreased Chl content and abnormal chloroplast development. Positional cloning revealed that YL3 encodes OsCHLH, a subunit of magnesium-chelatase. In yl3, one amino acid substitution occurs at the C-terminal region of a highly conserved amino acid residue. YL3 is constitutively expressed in all tissues. Compared with the wild type, yl3 was found to be sensitive to low temperature. The expression levels of genes for Chl biosynthesis, photosynthesis and chloroplast development were strongly reduced in yl3. These results provide novel insights regarding how rice chloroplast development and Chl synthesis are regulated by YL3.

키워드

Chlorophyll biosynthesis; YL3; Temperature sensitive; Rice

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