摘要
墨兰叶肉没有海绵组织和栅栏组织的分化 ,但在叶的不同部分的叶脉附近叶肉细胞有不同的形态变化 .叶尖和叶中部中脉附近的叶肉细胞排列紧密 ,细胞明显伸长 ,似栅栏组织 ,叶基部中脉附近的叶肉细胞没有伸长 .叶尖部叶绿体周径大 ,叶绿素含量高 ,光合速率亦较高 ,且Fv Fm、PSⅡ和qp
The mesophyll in leaves of Cymibidium sinense does not differentiate into spong and palisade tissue. Morphological changes have taken place in the mesophyll near midrib for the different parts of leaves. The cells of mesophyll near midrib in the apex and the middle part of leaves enlongated in length and differentiated into palisade-like tissue, whereas the cells of mesophyll in the base were not enlongated in length. The size of chloroplast in the apex of leaves is the biggest one in comparison with other parts of leaves, and it has higher content of chlorophyll. The apex parts of leaves have higher photosynthetic rate, and its Fv/Fm, ΦPSⅡ and q p are also higher than other parts of leaves.
出处
《生命科学研究》
CAS
CSCD
2002年第1期68-73,共6页
Life Science Research
基金
广东省自然科学基金资助项目 ( 96 0 46 7)
中国科学院院长基金资助项目 ( 76 7)
