A Study The On Cause of Photosynthetic “Widday-nap” of Wheat(IV)-Features of Accumulation of Soluble Carbohydrate of Wheat Organs During Grain Filling Period

doi:10.3321/j.issn:1000-7091.1988.02.002

Abstract

Abstract: On the basis of previous research work daily changes of soluble carbohyrate ut wheatorgans such as blade,sheath,sremp and.ear were studied.The results of experiment indicate:At the time of photosynthetic"midday.nap",the magnitude of accumulation of luble carbohydrate of wheat vegatative organs was highest during grain tilling period.several sugars range in order:can sugar>mono saccharide>starch in terms of magnitude of accumulation.Identical cause of nature of wheat organs such as blade,sheath earstemp was found.Before the heading period the accumulation of soluble carbohydrate was not tound.During the florescence the accumulaoion was found but it was not signittcant yet.then the accumulation of soluble carbohydrate was depressed during grain filling period the photosynthetic"midday.nap"was decreased and the net photosynthetic rate was increased,as a result,higher yield was obtianed.It was further proved that the accumutation of soluble carbohydrate was one of causes of photosynthetic"midday-nap"of wheat during grain filling period.

Key words: Wheat, Pholosynthetic midday nap, Accumulation of carbohydrate

Han Fengshan, Wang Chaojiang, Sun Zhenyuan. A Study The On Cause of Photosynthetic “Widday-nap” of Wheat(IV)-Features of Accumulation of Soluble Carbohydrate of Wheat Organs During Grain Filling Period[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1988, 3(2): 6-11. doi: 10.3321/j.issn:1000-7091.1988.02.002.

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