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浙江大学学报（农业与生命科学版）
浙江大学学报(农业与生命科学版)  2004, Vol. 30 Issue (4): 402-402    
论文     
Colonization and degradation of senescent flowers of zucchini squash by Trichoderma harzianum YC459, a biocontrol agent of gray mold, Botrytis cinerea
Geun Gon Kim　 Young Ryun Chung　
Geun Gon Kim（Department of Microbiology, Division of Applied Life Science (BK21),Gyeongsang National University, 900 Gazwa, Jinju 660-701, Korea）　　　　　　
Young Ryun Chung（Department of Microbiology, Division of Applied Life Science (BK21),Gyeongsang National University, 900 Gazwa, Jinju 660-701, Korea）
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Abstract: In commercial greenhouses, senescent flower petals or flowers of vegetables such as tomato,strawberry, hot pepper and zucchini squash were blighted to be removed from fruits within five days after spraying of Trichoderna harzianun YC459 (TORY() , JGreen Inc.), a biocontrol agent with good and consistent efficacy as chemical fungicides for the control of gray mold rot caused by B.cinerea. The mechanism for selective colonization of senescent floral tissues by T. harzianum YCA59was elucidated using fresh and senescent (4 days and 14 days after pollination, respectively) floral tissues of zucchini squash (Cucurbita moschata Duchesne) . The spores of T. harzianum YCA59were produced much more on water agar and liquid culture media supplemented with 5% dry powder of senescent floral tissues than with fresh tissues during 15 days incubation. Mycelial growth was also much better in the media with senescent tissues than with fresh tissues. Enzyme activities of carboxymethyl cellulase, amylase and polygalacturonase in the liquid media, which might be involved in the colonization and degradation of tissues by T. harzianum YCA59 were compared. The activities of three enzymes were significantly higher in the media with senescent floral tissues than with fresh floral tissues reaching to the maximum during 9 to 12 days of incubation. Especially, the activities of carboxymethyl cellulase and polygalacturonase of T. harzianum YC459 were much higher than those of other Trichoderma species, T. asperellum, T. viride and T. koningii in the liquid media with senescent floral tissues. Based on the results, the selective colonization and degradation of senescent floral tissues, an important habitat for B. cinerea, may be another mechanism for the biocontrol of gray mold rot of vegetables by T. harzianurm YC459.……
出版日期: 2004-07-12
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引用本文:

Geun Gon Kim　 Young Ryun Chung　. Colonization and degradation of senescent flowers of zucchini squash by Trichoderma harzianum YC459, a biocontrol agent of gray mold, Botrytis cinerea [J]. 浙江大学学报(农业与生命科学版), 2004, 30(4): 402-402.

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https://www.zjujournals.com/agr/CN/Y2004/V30/I4/402

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