逆境中沙冬青叶片细胞叶绿体的结构(简报)

THE SPECIAL STRUCTURE OF CHLOROPLASTS IN THE LEAF CELLS OF MONGOLIAN AMMOPIPTANTHUS UNDER ADVERSE CIRCUMSTANCES

沙冬青(Ammopiptanthus mongolicus)是亚洲中部一种超旱生植物,生长在荒漠、半荒漠地带,主要分布于我国内蒙古、宁夏、甘肃等地,是北方地区极少有的常绿阔叶植物,也是国家二级保护植物。沙冬青体内含有黄花木素、拟黄花木素等强生物碱,是重要的药用植物,也是极好的固沙、绿化荒丘植物。它耐热、旱、盐碱,更耐寒,能抵抗-30℃至-40℃的低温,所以也是植物抗逆性研究的理想材料。

The observation results with electron microscopy indicated that under extreme adverse circumstances, the chloroplasts in the leaf cells of the mongolian Ammopi-ptanthus manifested some special fine structures which can be summarized as follows: in summer, most of cell chloroplasts were short of granum-thylakoids and thy-lakoids were vesiculated, in winter, the chloroplasts occurred to gather and fuse each other, consequently lost their individualities. And in the same time, some membranes of chloroplast thylakoids have disintegrated and formed lipid granules. The authors discussed the significance of the structure alterations mentioned above to the adaptivity of the mongolian Am-mopiptanthus to harsh living environment.