Physiological and ecological effects of potassium on expansion of crocus corm

Abstract

Abstract: The corm size of Crocus sativus,a well-known medicine,is a key limiting factor for its stigma harvest.A water cultural experiment with four different potassium (K) concentrations showed that the K content,chlorophyll content,relative ATP content and net photosynthetic rate in C.sativus leaves increased with improving K concentration,which enhanced the function of leaves to be metabolic source.On the other hand,the K absorbing ability and the contents of soluble sugars,vitamin C (Vc) and protein in new-born corms were increased with improving K concentration,which also strengthened the function of new-born corms to be metabolic sink.This study also showed that K could promote the new-born corm growth rate of C.sativus through strengthening the function of “source" and “sink".

Key words: Crocus sativus, Potassium, Expansion of corms, Physiological and ecological effects

CLC Number:

Q946.11

LIU Yun, LONG Yun, ZHU Liquan, CAO Guoxing, ZHONG Zhangcheng . Physiological and ecological effects of potassium on expansion of crocus corm[J]. Chinese Journal of Applied Ecology, 2004, (4): 663-666.

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