作者
Sophia Biemelt, Henning Tschiersch, Uwe Sonnewald
发表日期
2004/5/1
期刊
Plant Physiology
卷号
135
期号
1
页码范围
254-265
出版商
American Society of Plant Biologists
简介
Gibberellins (GAs) are involved in regulation of many aspects during plant development. To investigate the impact of altered GA levels on plant growth and metabolism, transgenic tobacco (Nicotiana tabacum) plants have been engineered to express either a GA20-oxidase (AtGA20-ox) or a GA2-oxidase (AtGA2-ox) gene from Arabidopsis under control of the cauliflower mosaic virus 35S promoter. Resulting plants were characterized by elongated or stunted shoot growth, respectively, indicating changes in the content of bioactive GAs. In accordance with the effect on plant growth, biomass production was increased or decreased in AtGA20-ox or AtGA2-ox plants, respectively, and was found to be positively correlated with the rate of photosynthesis as determined at the whole plant level. Differences in dry matter accumulation were most likely due to changes in lignin deposition as indicated by histochemical …
引用总数
学术搜索中的文章
S Biemelt, H Tschiersch, U Sonnewald - Plant Physiology, 2004