title: Amelioration of Salt Stress on Bermudagrass by the Fungus Aspergillus aculeatus.
abstract: There is considerable evidence that plant abiotic-stress tolerance can be evoked by the exploitation of a globally abundant microbe. A. aculeatus, which was initially isolated from the rhizosphere of bermudagrass, has been shown to increase heavy metal tolerance in turfgrasses. Here, we report on the potential of A. aculeatus to induce tolerance to salt stress in bermudagrass. Physiological markers for salt stress, such as plant growth rate, lipid peroxidation, photosynthesis, and ionic homeostasis were assessed. Results indicated that strain A. aculeatus produced indole-3-acetic acid (IAA) and siderophores and exhibited a greater capacity for Na+absorption under salt stress. The plant inoculation by A. aculeatus increased plant growth and attenuated the NaCl-induced lipid peroxidation in roots and leaves of bermudagrass. The fungus significantly elevated the amount of IAA and glutathione and slightly enhanced photosynthetic efficiency of salt-treated bermudagrass. Tissues of inoculated plants had significantly increased concentrations of K+but lower Na+concentrations than those of uninoculated regimes. It appears that the role of A. aculeatus in alleviating bermudagrass salt stress is partly to produce IAA, to increase the activity of antioxidases, to absorb Na+by fungal hyphae, and to prevent the plant from ionic homeostasis disruption.
authors.affiliation: 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei, 430074, P.R. China; and.
authors.forename: Yan
authors.initials: Y
authors.lastname: Xie
authors.affiliation: 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei, 430074, P.R. China; and.|2 Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R. China.
authors.forename: Shijuan
authors.initials: S
authors.lastname: Han
authors.affiliation: 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei, 430074, P.R. China; and.|2 Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R. China.
authors.forename: Xiaoning
authors.initials: X
authors.lastname: Li
authors.affiliation: 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei, 430074, P.R. China; and.|2 Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R. China.
authors.forename: Erick
authors.initials: E
authors.lastname: Amombo
authors.affiliation: 1 Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan City, Hubei, 430074, P.R. China; and.
authors.forename: Jinmin
authors.initials: J
authors.lastname: Fu
mesh_terms: D001230:Aspergillus / Q000187:drug effects / Q000502:physiology*; D018533:Biomass; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D031744:Cynodon / Q000187:drug effects / Q000254:growth & development / Q000382:microbiology* / Q000502:physiology*; D005453:Fluorescence; D005978:Glutathione / Q000378:metabolism; D006706:Homeostasis / Q000187:drug effects; D006861:Hydrogen Peroxide / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007210:Indoleacetic Acids / Q000378:metabolism; D007477:Ions; D015227:Lipid Peroxidation / Q000187:drug effects; D008315:Malondialdehyde / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects; D018517:Plant Roots / Q000187:drug effects / Q000254:growth & development; D018520:Plant Shoots / Q000187:drug effects / Q000254:growth & development; D012965:Sodium Chloride / Q000494:pharmacology*; D013312:Stress, Physiological / Q000187:drug effects*
chemical_list: D007210:Indoleacetic Acids; D007477:Ions; D002734:Chlorophyll; D012965:Sodium Chloride; D008315:Malondialdehyde; C030737:indoleacetic acid; D006861:Hydrogen Peroxide; D005978:Glutathione; D000077194:Chlorophyll A