摘要： 研究用砂培盆栽法,选用抗旱性较强的621及抗旱性较弱的中麦9,在正常水分供应条件下,对不同施肥水平处理,整株水平的不同叶位间,叶片衰老的时空规律进行了研究。结果表明:小麦叶片的自然衰老具有明显的时空顺序特点,符合细胞调亡的特征。本研究为冬小麦叶片自然衰老是细胞凋亡类型的推断提供了间接证据。

关键词: 冬小麦, 叶片, 衰老, 凋亡

Abstract: In this paper,several morphological and physiologic parameters of leaf senescence of w inter wheatw ere studied under different levels of nut rition supply and normal condition of w ater. Garden pot s (20 cm value 20cm) filled with clean sand w ere used to culture the seedlings. Two varieties (No. 621,drought resistance,andZhong Mai No. 9,droug ht sensit ivity) were used. It could be concluded that de- green of leaf happened ordervaluely. The death initiated from older leaf and senescence began from t ip of leaf. In senile leaf the photosynthet icrate decreased sig nificant ly and content of chlorophyll and protein reduced at the same t ime. But w ater contentof leaf still remained a higher level. The evidence revealed the senescence of wheat leaf show ed the morpholog icand physionlog ic feature of programmed cell death in this study.

Key words: Winter wheat, Leaf, Senescence, Apoptosis

中图分类号: 

• S512.01