Effects of temperature,pH and drought stresses on ectomycorrhizal fungi growth in a Pinus sylvestris varmongolica plantation on sandy land

Abstract

Abstract: In this paper,ectomycorrhizal fungi(ECM fungi)Boletus sp.(BL),Lactarius sp.(LC) and Macrolepiota procera(MP) were collected from the sandy land Pinus sylvestris var. mongolica plantation in southeastern Keerqin in 2003 and 2004,and the growth of their pure culture was studied under simulated temperature,pH and drought stresses.The results showed that within the range of pH 3～7,the growth of the three test fungi was significantly different(P<0.05),with the optimum pH value being 5 for BL,6 for MP,and 7 for LC.The fungi could not grow at <5 ℃ or >37 ℃,and the optimum temperature was 25 ℃,25～28 ℃ and 25～30 ℃ for BL,MP and LC,respectively.The fungi could not grow when the PEG concentration was 30%((-1.53) MPa),but tended to increase when the PEG concentration was 10%(-0.20MPa).For LC,its growth was not influenced till the PEG concentration was 25%(-1.35MPa).With the real conditions considered,it could be deduced that the soil pH of the sandy land might fit the three test fungi,while the temperature and drought stresses during the growth season of P.sylvestris var.mongolica plantation might affect the growth and development of the fungi.Therefore,the decrease of ECM fungi should be one of the causes inducing the decline of P.sylvestris var.mongolica plantations on sandy land.

Key words: Lead, Uptake, Distribution, Rice (Oryza sativa L.)

CLC Number:

Q939.5

ZHU Jiaojun, XU Meiling, KANG Hongzhang, XU Hui, YAN Junjie. Effects of temperature,pH and drought stresses on ectomycorrhizal fungi growth in a Pinus sylvestris varmongolica plantation on sandy land[J]. cje, 2005, (12): 1375-1379.

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