Designing synthetic consortia of Trichoderma strains that improve antagonistic activities against pathogens and cucumber seedling growth
Designing synthetic consortia of Trichoderma strains that improve antagonistic activities against pathogens and cucumber seedling growth
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DOI：
10.1186/s12934-022-01959-2
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发表时间：
2022
影响因子：
6.4
通讯作者：
Jie Chen
中科院分区：
文献类型：
--
作者：
Dazhi Hao;Bo Lang;Yongkun Wang;Xinhua Wang;Tong Liu;Jie Chen
First, 15 Trichoderma strains were screened in terms of mycelium growth rate, antagonistic activity to a.variety of pathogens, stress tolerance to high temperature and salt stress, and cucumber seedling growth promotion.level. Then, the combinations of Trichoderma asperellum GDSF1009 (CGMCC NO. 9512), Trichoderma asperelloides Z4-1.(CGMCC NO. 40245), Trichoderma harzianum 10569 (CGMCC NO. 40246), and T. asperellum 10264 (CGMCC NO. 22404).were finally screened as an optimal consortium for co-culture underlying the levels of plant growth-promoting and.antagonistic activity to Fusarium oxysporum and seed germination promotion relative to the monoculture of a single.strain. Consortia with multiple co-cultured strains were found to generate larger amounts of free amino acids than.those from the monoculture of a single strain, and a pot assay also indicated that metabolites of co-cultures were.able to promote cucumber seedling growth superior to that with monoculture of a single strain, even though the.promotion was better than from simply mixed cultures from each of the four Trichoderma strains. Taken together, the.co-culture consortia composed of the four compatible interactive Trichoderma strains was a potential novel multiple.strain biocontrol agent based on the combination of synthetic consortia design and co-culture. In the field experiment, we found that the growth-promoting effect of the co-culture fermentation filtrate was better than that of the.single culture fermentation filtrate. Compared with T-Z4-1, T-1009, T-10264 and T-10569, the plant height of cucumber.was increased by 22.99%, 42.06%, 24.18% and 30.09%, respectively, and the stem diameter was increased by 16.59%,.18.83%, 13.65% and 14.70%, respectively.
