CLC number: S436.418
On-line Access: 2016-04-05
Received: 2015-10-10
Revision Accepted: 2015-12-10
Crosschecked: 2016-03-15
Cited: 0
Clicked: 3916
Heng Jiang, Liang Zhang, Jing-ze Zhang, Mohammad Reza Ojaghian, Kevin D. Hyde. Antagonistic interaction between Trichoderma asperellum and Phytophthora capsici in vitro[J]. Journal of Zhejiang University Science B, 2016, 17(4): 271-281.
@article{title="Antagonistic interaction between Trichoderma asperellum and Phytophthora capsici in vitro",
author="Heng Jiang, Liang Zhang, Jing-ze Zhang, Mohammad Reza Ojaghian, Kevin D. Hyde",
journal="Journal of Zhejiang University Science B",
volume="17",
number="4",
pages="271-281",
year="2016",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B1500243"
}
%0 Journal Article
%T Antagonistic interaction between Trichoderma asperellum and Phytophthora capsici in vitro
%A Heng Jiang
%A Liang Zhang
%A Jing-ze Zhang
%A Mohammad Reza Ojaghian
%A Kevin D. Hyde
%J Journal of Zhejiang University SCIENCE B
%V 17
%N 4
%P 271-281
%@ 1673-1581
%D 2016
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B1500243
TY - JOUR
T1 - Antagonistic interaction between Trichoderma asperellum and Phytophthora capsici in vitro
A1 - Heng Jiang
A1 - Liang Zhang
A1 - Jing-ze Zhang
A1 - Mohammad Reza Ojaghian
A1 - Kevin D. Hyde
J0 - Journal of Zhejiang University Science B
VL - 17
IS - 4
SP - 271
EP - 281
%@ 1673-1581
Y1 - 2016
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B1500243
Abstract: Phytophthora capsici is a phytopathogen that causes a destructive pepper blight that is extremely difficult to control. Using a fungicide application against the disease is costly and relatively ineffective and there is also a huge environmental concern about the use of such chemicals. The genus Trichoderma has been known to have a potential biocontrol issue. In this paper we investigate the mechanism for causing the infection of T. asperellum against P. capsici. Trichoderma sp. (isolate CGMCC 6422) was developed to have a strong antagonistic action against hyphae of P. capsici through screening tests. The strain was identified as T. asperellum through using a combination of morphological characteristics and molecular data. T. asperellum was able to collapse the mycelium of the colonies of the pathogen through dual culture tests by breaking down the pathogenic hyphae into fragments. The scanning electron microscope showed that the hyphae of T. asperellum surrounded and penetrated the pathogens hyphae, resulting in hyphal collapse. The results show that seven days after inoculation, the hyphae of the pathogen were completely degraded in a dual culture. T. asperellum was also able to enter the P. capsici oospores through using oogonia and then developed hyphae and produced conidia, leading to the disintegration of the oogonia and oospores. Seven days after inoculation, an average 10.8% of the oospores were infected, but at this stage, the structures of oospores were still intact. Subsequently, the number of infected oospores increased and the oospores started to collapse. Forty-two days after inoculation, almost all the oospores were infected, with 9.3% of the structures of the oospores being intact and 90.7% of the oospores having collapsed.
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