| 摘要: |
| 与对照矮变1号相比,返白过程中返白系叶片内叶绿素(Chl)和类胡萝卜素(Caro)含量降低,复绿过程中,两种色素的含量都升高,但在整个返白阶段中,返白系Chl/Caro比值始终低于对照矮变1号,说明类胡萝卜素含量的降低不是造成叶片变白的原因。对叶绿素生物合成中的两个关键中间产物δ-氨基乙酰丙酸(ALA)和原叶绿素(酸酯)[Pchl(ide)]的分析发现,在返白过程中,ALA相对积累,而Pchl(ide)含量降低,推测在返白过程中叶绿素合成受阻,这可能是返白系叶色在返白过程中褪绿变白的原因之一。 |
| 关键词: 叶绿素代谢,突变体,小麦 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助课题 |
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| Studies on the Albrescent Mechanism in Mutant "Stage Albinism Line of Winter Wheat" I.Changes in the Chlorophyll Metabolism During the Albescent Stage |
|
Su Xiaojing Wang Peihong chen Yuquan
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| Abstract: |
| Compared with “Aibian No.l”,the content of Chl(chlorophyll)
and Caro (carotinoid) in the leaves of albinism line decreased in the albescent
process,but increased in the regreening process.And the ratio between Chl /
Caro in the mutant leaves was always lower than that in the control
——Aibian No.1”during the albescent stage,thus,indicating that the decrease in the conent of Caro is not the main reason to cause the leaves become white or albescent.t has been found through an analysis of the content of ALA (符号一aminolevulinic acid) and Pchl (ide) (protochlorophyll (ide)) two precursors of the
biosynthesis of Chl. that the content of ALA relatively accumulated,but that
of pchl(ide) decreased during the albescent process.Thus,it can be deduced
that the biosynthesis of Chl was blocked in the albescent process.This might
be one reason that the leaf color of the albinism line of winter wheat can turn
from green to white in the albescent process. |
| Key words: chlorophyll metabolism, mutant, wheat |
