Regulation of gibberellin biosynthesis by light.
Phytochromes regulate transcript levels of gibberellin biosynthesis enzymes, GA 20-oxidases and/or GA 3beta-hydroxylases, in germinating lettuce and Arabidopsis seeds and in de-etiolating pea seedlings. Feedback regulation of GA biosynthesis by active GA is well established, but other mechanisms for regulation of these biosynthetic genes also exist, as this feedback does not operate on a GA 3beta-hydroxylase gene of Arabidopsis during seed germination.
Kamiya
Y
Y
Frontier Research Program, The Institute of Physical and Chemical Research, Wako-shi, Saitama, 351-0198, Japan. ykamiya@postman.riken.go.jp
García-Martínez
J L
JL
D017360:Arabidopsis / Q000378:metabolism; D018506:Gene Expression Regulation, Plant / Q000528:radiation effects*; D005875:Gibberellins / Q000096:biosynthesis*; D018545:Lactuca / Q000378:metabolism; D008027:Light; D006899:Mixed Function Oxygenases / Q000235:genetics / Q000378:metabolism; D008956:Models, Chemical; D018532:Pisum sativum / Q000378:metabolism; D010944:Plants / Q000235:genetics / Q000378:metabolism* / Q000528:radiation effects
D005875:Gibberellins; D006899:Mixed Function Oxygenases; C108186:gibberellin 3beta-hydroxylase