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| Difference of structural change of litchi pericarp infectedby different pathogenicity strains of Colletotrichum |
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| Abstract: |
| In…order…to…study…the…structural…change…of…litchi…pericarp…infected…by…Colletotrichum， we…used…two…
different…pathogenicity…of…C. gloeosporioides strains， 0977-19-2…with…strong…pathogenicity…and…09619-1-1…with…weaker…
pathogenicity， to…infect… ‘wuhe’ …fruits.…The…results…showed…that…the…structure…of…pericarp…infected…by…0977-19-2…changed…
rapidly， …the…hypha…penetrated…the…epidermal…cells…after…1…day， lots…of…acervulus…and…conidiums…were…produced…among…
epidermal…cells…after…5…days， and…acervulus…spreaded…gradually.…The…depressed…cell…of…pericarp…were…dissolved， and…
none…normal…cell…was…existed.…The…epicarp…and…palisade…tissue…treated…by…09619-1-1， did…not…been…damaged…in…2…days.…
In…the…last…day， most…of…cells…in…sunked…pericarp…disappeared， and…part…of…spongy…tissue…cells…dissolved.…Mycelia…and…
conidiospores…were…on…pericarp.…There…were…significant…different…responses…in…pericarp…after…the…infection…of…different…
pathogenicity…of…Colletotrichum.…The…response…on…strong…pathogenicity…was…quick， the…cells…melted…rapidly， the…speed…of…
invading， colonizing…and…spreading…of…strong…pathogenicity…of…Colletotrichum…were…faster. |
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