欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
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．
英文摘要：
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.
同期刊论文项目
同项目期刊论文
Cascade transduction and production of the light-nitric oxide signal from shoots to roots in maize s
Relation of several antioxidant enzymes to rapid freezing resistance in suspension cultured cells fr
Low temperature-induced accumulation of anthocyanin, cycles ascorbate–glutathione and xanthophyll po
期刊信息
位置：