Role of root exuded organic acids in mobilization of soil phosphorus and micronutrients

Abstract

Abstract: As a kind of adaptive mechanism, many plants can increase organic acid exudation in response to nutrient stress, especially Pdeficiency. This paper discussed the root exuded organic acids of different ecotype plants under nutrient stress. The kinds and amounts of root exuded organic acids under Pdeficiency were highly related to surrounding soil environment. The organic acids exuded by root under nutrient stress were able to mobilize soil phosphorus and micronutrients, and to relieve aluminum toxicity. The paper also discussed the possible mechanism of soil nutrient mobilization and aluminum detoxification.

Key words: Nutrient stress, Different ecotype plants, Organic acids exudation, Nutrient mobilization, bryophyte, coarse woody debris, gap, alpine forest., nutrient

Lu Wenlong, Cao Yiping, Zhang Fusuo . Role of root exuded organic acids in mobilization of soil phosphorus and micronutrients[J]. Chinese Journal of Applied Ecology, 1999, 10(3): 379-382.

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