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- W1964426223 abstract "SUMMARY Evidence for the role of chitinases, proteases and β‐1,3‐ and β‐1,6‐glucanases in mycoparasitism by Trichoderma species has been well documented. Moreover, constitutive over‐expression of genes encoding individual cell‐wall‐degrading enzymes (CWDEs) has been shown to improve the potential of biological agents. In this study, we generated transformants of T. virens in which β‐1,3‐ and β‐1,6‐glucanase genes, TvBgn2 and TvBgn3 , respectively, were constitutively coexpressed in the same genetic T. virens Gv29.8 wild‐type background. The double over‐expression transformants (dOEs) grow and sporulate slower than the wild‐type (WT). However, the reduction in growth did not seem to affect their mycoparasitic and biocontrol capabilities, as dOEs displayed much higher levels of total β‐1,3‐ and β‐1,6‐glucanase activity than the WT. This higher enzymatic activity of dOEs positively correlated with observed in vitro inhibition of Pythium ultimum and Rhizoctonia solani mycelia, and with enhanced bioprotection of cotton seedlings against P. ultimum , R. solani and Rhizopus oryzae . Besides effective biocontrol of all pathogens at an original inoculum level, the performance of dOEs was highly enhanced (up to 312% of WT performance) when pathogen pressure was greater (i.e. concentration of inoculum was higher or pathogens applied in combination). These results demonstrate that the strategy of introducing multiple lytic enzyme‐encoding genes through transformation of a given biocontrol strain can be successfully used to achieve better biocontrol." @default.
- W1964426223 created "2016-06-24" @default.
- W1964426223 creator A5013555143 @default.
- W1964426223 creator A5014519593 @default.
- W1964426223 creator A5078284933 @default.
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- W1964426223 date "2007-06-22" @default.
- W1964426223 modified "2023-10-13" @default.
- W1964426223 title "Enhanced biocontrol activity of Trichoderma virens transformants constitutively coexpressing ?-1,3- and ?-1,6-glucanase genes" @default.
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- W1964426223 doi "https://doi.org/10.1111/j.1364-3703.2007.00407.x" @default.
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