ROOT-SHOOT INTERACTION IN THE GREENING OF WHEAT SEEDLINGS CROWN UNDER RED-LIGHT

被引:100
作者
TRIPATHY, BC [1 ]
BROWN, CS [1 ]
机构
[1] DYNAMAC CORP,KENNEDY SPACE CTR,FL 32899
关键词
D O I
10.1104/pp.107.2.407
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Wheat seedlings grown with roots exposed to constant red light (300-500 mu mol m(-2) s(-1)) did not accumulate chlorophyll in the leaves. In contrast, seedlings grown with their roots shielded from light accumulated chlorophylls. Chlorophyll biosynthesis could be induced in red-light-grown chlorophyll-deficient yellow plants by either reducing the red-light intensity at the root surface to 100 mu mol m(-2) s(-1) or supplementing with 6% blue light. The inhibition of chlorophyll biosynthesis was due to impairment of the Mg-chelatase enzyme working at the origin of the Mg-tetrapyrrole pathway. The root-perceived photomorphogenic inhibition of shoot greening demonstrates root-shoot interaction in the greening process.
引用
收藏
页码:407 / 411
页数:5
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