The Changes of Photosynthetic Properties in Radish Leaves During Leaf Senescence

doi:10.7668/hbnxb.2007.S2.010

Abstract

Abstract: The changes of photosynthetic properties in radish leaves during leaves senescence were studied with two radish cultivars(cv.CR0502 and cv.CR0509).The main results showed that during the whole process of leaves senescence,except slow decline of Ls with leaves growth,chlorophyll contents,Pn,Gs,Tr,Fv/Fm and фPSⅡin the leaves kept consistently in the fluctuation,namely,the trend changed parabolically,attained to apex levels at 25 d,then decined gradually.There are significant difference between the two cultivars,decline rate of cv.CR0502 greatly higher than that of cv.CR0509.During leaves is coming out,stomatal and non-stomatal fators existed simultaneously,and they all affected Pn.While the decline of photosynthetic function mainly depended on the non-stomatal limitation in the course of senescene.

Key words: Radish, Physiology, Leaf senescence, Photosynthetic properties

CLC Number:

S631.1

WANG Ling-ping, MAO Wei-hai, HU Tian-hua, BAO Chong-lai, DAI Dan-li. The Changes of Photosynthetic Properties in Radish Leaves During Leaf Senescence[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(S2): 36-39. doi: 10.7668/hbnxb.2007.S2.010.

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