Changes in photosynthetic capacity and antioxidant enzymatic systems in micropropagated Zingiber officinale plantlets during their acclimation

被引：11
|
作者：
Guan, Q. Z. [1 ]
Guo, Y. H. [1 ]
Sui, X. L. [1 ]
Li, W. [1 ]
Zhang, Z. X. [1 ]
机构：
[1] China Agr Univ, Coll Agron & Biotechnol, Beijing 100094, Peoples R China
来源：
PHOTOSYNTHETICA | 2008年 / 46卷 / 02期
基金：
中国国家自然科学基金;
关键词：
antioxidative enzymes; chlorophyll content and fluorescence; chloroplast ultrastructure; ginger; dry mass; net photosynthetic rate; photochemical quenching; plant height;
D O I：
10.1007/s11099-008-0031-y
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Ginger (Zingiber officinale Rosc.) plantlets were propagated in vitro and acclimated under different photosynthetic photon flux densities (60 and 250 mu mol m(-2) s(-1) = LI and HI, respectively). Increases in chlorophyll (Chl) content and Chl a/b ratio were found under both irradiances. In vitro plantlets (day 0) exhibited a low photosynthesis, but chloroplasts from in vitro leaves contained well developed grana and osmiophillic globules. Photoinhibition in leaves formed in vitro was characterized by decrease of photochemical efficiency and quantum efficiency of photosystem 2 photochemistry in HI treatment during acclimation. The new leaves formed during acclimation in both treatments showed a higher photosynthetic capacity than the leaves formed in vitro. Also activities of antioxidant enzymes of micropropagated ginger plantlets changed during acclimation.
引用
收藏
页码：193 / 201
页数：9
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