Study on Relationship Between Drought Resistance and Flag Leaf Photosynthetic Characteristics of Wheat Varieties

doi:10.3321/j.issn:1000-7091.2002.01.001

Abstract

Abstract: Six wheat varieties with different drough resistance were planted in normal irrigation or drought conditions. The drough-resistant abilities of tested wheat varieties were compared,and the relations between the drought resistance and the photosynthetic characteristichs of flag leaf at flowering stage were studied.The results showed that the tested wheat varieties had similar photosynthetic rate(Pn)at flowering stage at normal irrigation condition.Under drought condition,the Pn and the stomatal conductance(gs) were significant different among the tested varieties at flowering stage:Jinmai 33,Henong 859 had high Pn and gs at flowering stage,this was useful to their drought resistance.The Pn and gs of Jimai 3235 and Zhongmai No.9 were greatly influenced at flowering stage,this may be one reason for their bad drought resistance.Changle No.5,Wenmai No. 6 hacl higher Pn and gs at flowering stage, yet their drought resistance was poor.It indictated that the bad drought resistance of Changle No. 5 and Wenmai No.6 were controlled by other physiological metabolism after flowering stage.

Key words: Wheat, Variety, Drought resistance, Photosynthetic characteristics, Flowering stage

CLC Number:

S512.1

Gu Juntao, Qu Ping, Liu Guiru, Xiao Kai. Study on Relationship Between Drought Resistance and Flag Leaf Photosynthetic Characteristics of Wheat Varieties[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2002, 17(1): 1-5. doi: 10.3321/j.issn:1000-7091.2002.01.001.

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