Mycorrhizal symbiosis alters root H+ effluxes and root system architecture of trifoliate orange seedlings under salt stress.

摘要: H fluxes are important for exchange of nutrients and regulation cytosolic pH cell wall plasticity. Root system architecture (RSA) is a deciding factor in waterand nutrient-uptaked efficiency plant. Four-month-old trifoliate orange (Poncirus trifoliata L. Raf.) seedlings inoculated with or without an arbuscular mycorrhizal fungus (Funneliformis mosseae) were conducted to analyze root effluxes RSA under the conditions 100 mM NaCl, KCl, NaNO3. Although salt stress partly inhibited growth performance (plant height, stem diameter, leaf number) variables (length, projected area, surface volume, average diameter), inoculation generally significantly increased these traits. There was more acid environment rhizosphere than non-mycorrhizal seedlings, based on bromocresol purple dyeing. The efflux rates by treatments. On other hand, F. mosseae 14.3%, 31.7%, 10.3%, 16.7% NaNO3 non-salt conditions, respectively. It concluded that symbiosis improved stress, which might enhance tolerance host