Mycobiology.  2021 Aug;49(4):396-405. 10.1080/12298093.2021.1938803.

Two Arbuscular Mycorrhizal Fungi Alleviates Drought Stress and Improves Plant Growth inCinnamomum migao Seedlings

Affiliations
  • 1Guizhou Academy of Sciences, Guizhou Province Institute of Mountain Resources, Guiyang, China
  • 2College of Forestry, Guizhou University, Guiyang, China
  • 3College of Pharmacy, Guizhou University of Traditional Chinese Medicine, Guiyang, China

Abstract

Cinnamomum migao plants often face different degrees of drought in karst habitats, which can lead to plants’ death, especially in the seedling stage. Widespread of arbuscular mycorrhizal (AM) fungi in karst soils have the potential to address this drought, which is a threat to C. migao seedlings. We inoculated C. migao seedlings with spores from Glomus lamellosum and Glomus etunicatum, two AM fungi widely distributed in karst soils, to observe seedling growth response after simulated drought. Our results showed that 40 g of G. lamellosum and G. etunicatum significantly promoted the growth of C. migao seedlings, 120 days after inoculation. Following a 15-day drought treatment, root colonization of the seedlings with G. lamellosum or G. etunicatum had lower the accumulation of malondialdehyde (MDA) and increased the accumulation of enzymes and osmotic substances in the seedlings. The relative water content in different organs (roots, stems, and leaves) of the drought-stressed seedlings was higher in plants with G. lamellosum or G. etunicatum than in plants without AM fungi colonization. Our results showed that inoculation with AM fungi was an effective means to improve the drought resistance of C. migao seedlings.

Keyword

AM fungi; Cinnamomum migao; drought; enzyme; osmoreceptor
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