光敏色素
生物
突变体
异位表达
拟南芥
细胞生物学
基因
植物
拟南芥
遗传学
红灯
作者
Takeshi Izawa,Tetsuo Oikawa,Satoru Tokutomi,Kazutoshi Okuno,Ko Shimamoto
出处
期刊:Plant Journal
[Wiley]
日期:2000-06-01
卷期号:22 (5): 391-399
被引量:245
标识
DOI:10.1046/j.1365-313x.2000.00753.x
摘要
Summary The photoperiodic sensitivity 5 ( se5 ) mutant of rice, a short‐day plant, has a very early flowering phenotype and is completely deficient in photoperiodic response. We have cloned the SE5 gene by candidate cloning and demonstrated that it encodes a putative heme oxygenase. Lack of responses of coleoptile elongation by light pulses and photoreversible phytochromes in crude extracts of se5 indicate that SE5 may function in phytochrome chromophore biosynthesis. Ectopic expression of SE5 cDNA by the CaMV 35S promoter restored the photoperiodic response in the se5 mutant. Our results indicate that phytochromes confer the photoperiodic control of flowering in rice. Comparison of se5 with hy1 , a counterpart mutant of Arabidopsis , suggests distinct roles of phytochromes in the photoperiodic control of flowering in these two species.
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