Relationship of the Alteration of Morphology and Physiology with the Variety and Nutrition Level During Leaf Senescence of Winter Wheat

doi:10.3321/j.issn:1000-7091.2003.z1.012

Abstract

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

CLC Number:

S512.01

CUI Si-ping, LIU Yi-qian, WANG Chun-xiang, WEI Jian-kun, GUO Xiu-lin, MA Chun-hong, YU Shu-chi. Relationship of the Alteration of Morphology and Physiology with the Variety and Nutrition Level During Leaf Senescence of Winter Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.3321/j.issn:1000-7091.2003.z1.012.

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