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      2. 獼猴桃采后軟腐病病原菌鑒定及香芹酚對其控制效果
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        國家重點研發計劃項目 ( 2019YFD1002300)


        Identification of soft rot pathogens in postharvest kiwifruit and its control effect by carvacrol
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          摘要:

          為明確獼猴桃軟腐病病原菌種類及香芹酚對其控制效果,依據傳統真菌形態學觀察法和rDNA-ITS序列分析技術對發病獼猴桃果實中的致病菌進行病原菌的分離鑒定,并探討香芹酚對分離得到的獼猴桃軟腐病菌的控制效果。結果表明:引起獼猴桃采后果實軟腐病的主要致病菌為葡萄座腔菌(Botryosphaeria dothidea)與擬莖點霉菌(Phomopsis sp.),其次為灰葡萄孢菌(Botrytis cinerea)、層出鐮刀菌(Fusarium proliferatum)和鏈格孢菌(Alternaria sp.);香芹酚對8株獼猴桃軟腐病病原真菌均表現出良好的抑菌活性,對葡萄座腔菌和擬莖點霉菌的抑制作用尤為顯著,半抑制質量濃度(EC50)為8.87 μg/L。同時,香芹酚有效控制模擬銷售環境下獼猴桃果實軟腐病的發生,放置8 d時處理組發病率僅為對照果實的50.17%,且對獼猴桃果實的品質指標影響不顯著(P>0.05)。因此,香芹酚在控制獼猴桃果實采后軟腐病方面具有潛在的應用價值。

          Abstract:

          The pathogenic fungi causing kiwifruit soft rots were isolated and identified by examining the morphological and microscopic characteristics,combined with the results of pathogenicity testing and rDNA-ITS (internal transcribed spacer) sequencing.The contril effect of carvacrol on kiwifruits soft rot was studied.The main pathogens causing soft rot of kiwifruit after harvest are Botryosphaeria dothidea and Phomopsis sp.,followed by Botrytis cinerea,Fusarium proliferatum and Alternaria sp.. Carvacrol had significant antifungal activity against the eight soft rot pathogens,especially for B.dothidea,with half effective concentration (EC50) of 8.87 μg/L.Simultaneously,carvacrol effectively reduced the incidence of kiwifruit soft rot in a simulated sales environment.The incidence of treatment group was only 50.17% of the control fruit when placed for 8 days,and it had no significant effect on the quality of kiwi fruit (P>0.05).Therefore,carvacrol has potential application value in controlling soft rot of kiwifruit after harvest.

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        左盼盼,付蘇,彭麗桃,范剛,楊書珍,李杰.獼猴桃采后軟腐病病原菌鑒定及香芹酚對其控制效果[J].華中農業大學學報,2020,39(6):15-22

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        • 收稿日期:2020-05-11
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        • 在線發布日期: 2020-12-01
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