丛枝菌根接种对黄檀的抗旱性影响

Effects of AM Fungal Inoculation on the Growth and Physiology of Dalbergia hupeana under Drought Stress

丛枝菌根真菌(AMF)是一种可以通过与植物共生来增强植物抗性的微生物。为探究丛枝菌根真菌对黄檀(Dalbergia hupeana)的生长及抗旱性的影响,本研究设置了接种摩西斗管囊霉(Funneliformis mosseae,MX)、幼套近明囊霉(Claroideoglomus etunicatum, YT)、根内根孢囊霉(Rhizophagus intraradices, GN)、三个菌种等量混合接种(MIX)和不接种(CK)共5个处理,模拟自然干旱条件下,探究丛枝菌根对黄檀幼苗的生长及生理生化指标的影响。研究结果表明:(1)接种丛枝菌根真菌能显著提高黄檀的总生物量、株高和根系生长;(2)接种丛枝菌根真菌能显著提高植物的超氧化物歧化酶(superoxide dismutase, SOD)、过氧化物酶(peroxidase,POD)、可溶性蛋白(soluble protein, SP)含量,降低丙二醛(malondialdehyde, MDA)含量;(3)综合评价各个菌根处理的黄檀抗旱性为MIX>GN>YT>MX>CK。从而表明,接种丛枝菌根真菌能够增强黄檀的抗旱性。

Arbuscular mycorrhizal fungi(AMF) are microorganisms that can enhance plant resistance through symbiosis with plants. In this study, in order to explore the effect of arbuscular mycorrhizal fungi on the growth and drought resistance of Dalbergia hupeana, five treatments were set up, including inoculation of Funneliformis mosseae(MX), Claroideoglomus etunicatum(YT), Rhizophagus intraradices(GN), three strains of mixed inoculation(MIX),and no inoculation(CK), under the simulated natural drought conditions, to explore the effect of arbuscular mycorrhiza on the growth and physiological and biochemical indexes of D. hupeana seedlings. The results showed that:(1) the inoculation of arbuscular mycorrhizal fungi could significantly increase the total biomass, plant height and root length of D. hupeana.(2) Inoculation of arbuscular mycorrhizal fungi could significantly increase the content of SOD, POD, SP and reduce the content of MDA in plants.(3) The comprehensive evaluation of the drought resistance of D. hupeana. under each mycorrhizal treatment was MIX>GN>YT>MX>CK. Thus it was shown that the inoculation of arbuscular mycorrhizal fungi could enhance the drought resistance of D. hupeana.