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两种圆柏属植物不同季节显微和超微结构变化与耐寒性的关系

张有福1;陈银萍2,3;张满效1,4;陈拓1;安黎哲1,2   

  1. 1中国科学院寒区旱区环境与工程研究所, 兰州 730000; 2兰州大学生命科学学院, 兰州 730000; 3兰州交通大学环境与市政工程学院, 兰州 730070; 4兰州石化职业技术学院, 兰州 730060
  • 收稿日期:2005-07-11 修回日期:2006-06-04 出版日期:2006-08-18 发布日期:2006-08-18

Seasonal changes in foliar micro-and ultra structure of two Sabina species and their relationships with cold tolerance

ZHANG Youfu1; CHEN Yinping2,3; ZHANG Manxiao1,4; CHEN Tuo1; AN Lizhe1,2   

  1. 1Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China; 2 School of Life Science, Lanzhou University, Lanzhou 730000, China; 3School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; 4Lanzhou College of Petrochemical Technology, Lanzhou 730060, China
  • Received:2005-07-11 Revised:2006-06-04 Online:2006-08-18 Published:2006-08-18

摘要: 以祁连圆柏和圆柏为材料,研究了圆柏属植物的抗寒性与解剖结构变化,以及淀粉与可溶性糖粉转化的关系.结果表明,祁连圆柏和圆柏叶片的上下表皮细胞外覆盖一层角质膜,叶肉细胞间隙大,形成发达的通气组织.在生长季节,二者叶绿体内均积累了很多淀粉粒,在冷冻休眠季节淀粉粒消失或变小,同时叶片可溶性糖分含量增加,祁连圆柏的可溶性糖分增幅高于圆柏;而休眠季节圆柏叶绿体受到低温伤害,脂质球数目增多,出现脂质小滴,部分叶绿体变形,祁连圆柏类囊体的结构受到影响较小,脂质球数量少,叶绿体形状没有发生明显的变化.因此,祁连圆柏和圆柏抗寒性与发达的通气组织和淀粉粒生长季节的积累有关,在低温胁迫下祁连圆柏叶绿体表现出高的稳定性,通过可溶性糖分的调节力强,耐寒性增强.

关键词: 温带阔叶红松林, 总初级生产量, 通量观测, 3PG模型, 模型结构优化

Abstract: In this paper, the foliar micro-and ultra structure of Sabina przewalskii and S. chinensis during growth and dormancy seasons was observed under microscope and transmission electron microscope, and the foliar soluble sugar content was measured, aimed to probe into their relationships with cold tolerance. The results showed that the foliar surface cells of these two Sabina species were covered with thick cuticular membrane, and the welldeveloped arenchyma appeared in the mesophyll. In growth season, starch grains accumulated in chloroplasts, but in dormancy season, the accumulated starch grains disappeared or diminished, while soluble sugar content had a larger increase. In wintertime, the chloroplasts of S. chinensis were injured, with some abnormal chloroplasts, increased plastoglobuli and some lipid drops, while those of S. przewalskii were not obviously injured. It was suggested that the cold tolerance of the two Sabina species was related to their well-developed arenchyma, accumulation of starch grains in growth season, and increase of soluble sugar content in dormancy season. S. przewalskii had more marked increase of soluble sugar content, and its chloroplasts were more stable than S. chinensis.

Key words: temperate broadleaved Korean pine forest., gross primary productivity, flux observation, physiological principles in predicting growth model, model structure optimization