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SONG Yinping, MIAO Fengping, LIU Xianghong, JI Naiyun. Responses of marine-derived Trichoderma fungi to seawater and their potential antagonistic behaviour[J]. HaiyangYuHuZhao, 2019, 37(2): 525-534

Responses of marine-derived Trichoderma fungi to seawater and their potential antagonistic behaviour

SONG Yinping1,2, MIAO Fengping1, LIU Xianghong1, JI Naiyun1
1 Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China
To explore the metabolic responses of marine-derived Trichoderma fungi to environmental stresses, the survivability, metabolism, and antagonism of ten marine isolates have been examined. Their survival in both freshwater and seawater indicates them to be facultative marine fungi, but they are more adaptable to marine environment. Most of them feature strain-specific and positive metabolic responses to seawater, which also usually result in the higher proportions of heteroatom-bearing and unsaturated units in mycelial constituents. Seawater factors can promote many strains to produce bioactive metabolites, including plant pathogen-and marine phytoplankton-inhibitory and marine animal-toxic ones, but the effects of NaCl are often weak or negative. The inhibition of marine phytoplankton corresponds to the intracellular accumulation of heteroatom-bearing and unsaturated units under seawater condition, and the varied toxicities to marine animals further signify the divergences of lipophilic exudates under different conditions. The results may contribute to further understanding and mining the structural diversity and biological activity of secondary metabolites from marine-derived Trichoderma fungi.
Key words:    Trichoderma|fungus|metabolic response|seawater|antagonistic potential   
Received: 2018-03-25   Revised: 2018-05-24
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