Chang Wei, Sui Xin, Fan Xiao-Xu, Jia Ting-Ting, Song Fu-Qiang
College of Forestry, Northeast Forestry University, Harbin, China.
College of Life Sciences, Heilongjiang University, Harbin, China.
Front Microbiol. 2018 Apr 5;9:652. doi: 10.3389/fmicb.2018.00652. eCollection 2018.
L. is a drought-resistant species. Arbuscular mycorrhizal symbiosis is considered to be a bio-ameliorator of saline soils that can improve salinity tolerance in plants. The present study investigated the effects of inoculation with the arbuscular mycorrhizal fungus on the biomass, antioxidant enzyme activities, and root, stem, and leaf ion accumulation of seedlings grown during salt stress conditions. Salt-stressed mycorrhizal seedlings produced greater root, stem, and leaf biomass than the uninoculated stressed seedlings. In addition, the seedlings colonized by showed notably higher activities of superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) in the leaves of the mycorrhizal seedlings in response to salinity compared to those of the non-mycorrhizal seedlings. Mycorrhizal seedlings not only significantly increased their ability to acquire K, Ca, and Mg, but also maintained higher K:Na ratios in the leaves and lower Ca:Mg ratios than non-mycorrhizal seedlings during salt stress. These results suggest that the salt tolerance of seedlings could be enhanced by The arbuscular mycorrhizal symbiosis could be a promising method to restore and utilize salt-alkaline land in northern China.
L.是一种抗旱物种。丛枝菌根共生被认为是盐碱土的生物改良剂，能够提高植物的耐盐性。本研究调查了接种丛枝菌根真菌对盐胁迫条件下生长的幼苗的生物量、抗氧化酶活性以及根、茎和叶离子积累的影响。盐胁迫下的菌根幼苗比未接种的胁迫幼苗产生了更多的根、茎和叶生物量。此外，与非菌根幼苗相比，接种菌根的幼苗在应对盐胁迫时，叶片中的超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和抗坏血酸过氧化物酶（APX）活性显著更高。菌根幼苗不仅显著提高了获取钾、钙和镁的能力，而且在盐胁迫期间，其叶片中的钾钠比高于非菌根幼苗，钙镁比低于非菌根幼苗。这些结果表明，接种菌根可增强L.幼苗的耐盐性。丛枝菌根共生可能是中国北方盐碱地恢复和利用的一种有前景的方法。
