接种ERM真菌对桃叶杜鹃幼苗的促生效应及生理生化影响

doi:10.11707/j.1001-7488.20130707

Abstract

Abstract:

Twelve ericoid mycorrhiza (ERM) fungal isolates were used to inoculate 2-year-old Rhododendron annae Franch. seedlings to study effects of the inoculations on the plant growth potential, biomass and endogenous hormones contents and enzyme activity. The results showed that the inoculations with ERM significantly increased height, diameter, leaf area, mainroot length and biomass of the seedlings. The height increased by 29.47%-73.68% than that control, and diameter increased by 11.16%~70.09%. The total biomass increased by 3.86%-61.22%, of which the highest increase in shoot dry weight was 99.69%, and and the highest increase in underground part dry weight was 27.27%. The contents of indole acetic acid(IAA), gibberellin (GA₃), zeatin riboside (ZR), abscisic acid (ABA) and the activity of superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) in the inoculated seedlings with ERM were significantly higher than those in non-inoculated plants, while the malondialdehyde (MDA) content was less than that of control. ERM fungi might promote the growth of R. annae seedlings through secreting hormone or stimulating the secretion of plant hormones, or coordinating several hormones. As for the comprehensive effects of the inoculations, strains TY35, TY18, TY29, TY19, TY02, and TY12 were selected as optimum ERM isolates for seedlings of R. annae.

Key words: ericoid mycorrhiza fungi, growth promoting effects, endogenous hormone, oxidase activity, Rhododendron annae

CLC Number:

S718.43

Ou Jing, Wei Xiaoli, He Yuejun, Liu Renyang, Chen Xun. Effects of Inoculation with ERM Fungi Isolates on the Growth and Physio-biochemical Properties of Rhododendron annae seedlings[J]. Scientia Silvae Sinicae, 2013, 49(7): 48-56.

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Effects of Inoculation with ERM Fungi Isolates on the Growth and Physio-biochemical Properties of Rhododendron annae seedlings

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