Shoot growth and changes in the mesophyll cell structure in the biennial needles of Abies sibirica Ledeb.

被引：1
|
作者：
Zagirova, SV [1 ]
机构：
[1] Russian Acad Sci, Urals Div, Komi Res Ctr, Inst Biol, Syktyvkar 167982, Russia
来源：
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY | 2003年 / 50卷 / 01期
关键词：
Abies sibirica; needles; mesophyll; ultrastructure; photosynthesis; dark respiration;
D O I：
10.1023/A:1021928216235
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Structural aspects of source-sink relations in current-year and second-year shoots of Siberian fir were investigated. The period of linear growth of current-year shoots was accompanied by a decrease in the size of starch granules in chloroplasts and the number of mitochondria, as well as by the disappearance of lipid inclusions in the mesophyll cells of second-year needles. Growth processes did not affect seasonal changes in the structure of chloroplast grana in these cells. After the termination of shoot growth, large polysaccharide globules appeared in the cytoplasm of mesophyll cells in second-year needles. It is possible that the formation of these inclusions prevents the inhibition of the photosynthesis by starch, which was accumulated in chloroplasts.
引用
收藏
页码：36 / 40
页数：5
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