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Banpu Ruan,Zhenyu Gao,Juan Zhao,Bin Zhang,Anpeng Zhang,Kai Hong,Shenglong Yang,Hongzhen Jiang,Chaolei Liu,Guang Chen,Youlin Peng,Guojun Dong,Longbiao Guo,Zhengjin Xu,Qian Qian 한국식물학회 2017 Journal of Plant Biology Vol.60 No.4
Leaf color-related mutants are important materialsto study the chlorophyll biosynthesis and chloroplastdevelopment. Here, we isolated and characterized a thermosensitiveyellow-green leaf mutant, ygl, through mutagenizedJaponica rice cultivar Zhonghua11 by EMS. The mutantshowed yellow-green leaves only at the seedling stage. Genetic and molecular analyses uncovered that YGL encodean Mg2+-chelatase ChlD subunit, which was a new allele ofChl1/YGL7. Quantitative PCR and GUS staining showedthat the YGL transcripts expressed in all tested organs andsubcellular localization detected YGL protein in the chloroplasts. The mutant displayed yellow-green leaves at 20°C andnormal green leaves at 34°C during the seedling stage. Transcript level of YGL in the ygl mutant was significantlyreduced at 20°C, and increased at 34°C compared with thewild-type plant. Furthermore, the expression of chlorophyllbiosynthesis and chloroplast development related genes wereinfluenced by the mutation of YGL at different temperature. These findings suggested that the YGL gene not only play akey role in chlorophyll biosynthesis, but is affected attranscript level by temperature in rice.