EXTENSION-GROWTH RESPONSES AND EXPRESSION OF FLAVONOID BIOSYNTHESIS GENES IN THE ARABIDOPSIS HY4 MUTANT

被引:5
作者
JACKSON, JA [1 ]
JENKINS, GI [1 ]
机构
[1] UNIV GLASGOW,INST BIOMED & LIFE SCI,DIV BIOCHEM & MOLEC BIOL,PLANT MOLEC SCI GRP,GLASGOW G12 8QQ,LANARK,SCOTLAND
关键词
ARABIDOPSIS (HY4 MUTANT); BLUE-LIGHT; MUTANT (ARABIDOPSIS); PHOTOMORPHOGENESIS; FLAVONOID BIOSYNTHESIS;
D O I
暂无
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The hy4 mutant of Ar Arabidopsos thaliana (L.) Heynh. was previously shown to be impaired in the suppression of hypocotyl extension specifically by blue light. We report here that hy4 is altered in a range of blue-light-mediated extension-growth responses in various organs in seedlings and mature plants: it shows greater length of bolted stems, increased petiole extension and increased leaf width and area in blue light compared to the wild type. The hy4 mutant shows decreased cotyledon expansion in both red and blue light compared to the wild type. Anthocyanin formation and the expression of several flavonoid biosynthesis genes is stimulated by blue light in the wild type but to a much lower extent in hy4. The results indicate that the HY4 gene product is concerned with the perception of blue light in a range of extension-growth and gene-expression responses in Arabidopsis.
引用
收藏
页码:233 / 239
页数:7
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