Trouillas F P, Gubler W D
Department of Plant Pathology, University of California, Davis 95616.
Plant Dis. 2010 Jul;94(7):867-872. doi: 10.1094/PDIS-94-7-0867.
Diatrypaceous fungi have been isolated from cankered wood of grapevines (Vitis vinifera) in California. However, the pathogenicity of these fungi and their potential to cause diseases in grapevine was unknown. A series of pathogenicity tests were conducted to determine if these fungi were grapevine pathogens. In all experiments, species of the family Diatrypaceae were re-isolated from the margins of developing lesions, although frequency of re-isolation and average length of vascular discolorations varied among isolates. Cryptovalsa ampelina, Diatrype stigma, and Eutypa leptoplaca were capable of colonizing dormant canes and causing vascular necrosis. Cryptosphaeria pullmanensis, C. ampelina, D. stigma, Diatrype whitmanensis, and E. leptoplaca infected and caused lesions in green shoots of the new vegetative growth. Diatrype oregonensis and Diatrypella verrucaeformis isolates did not produce lesions that were significantly different from those produced in the control shoots and canes. This suggests that D. oregonensis and D. verrucaeformis fungi may be saprophytic rather than pathogenic to grapevine.
在加利福尼亚州，已从葡萄（葡萄属葡萄）的溃疡病木材中分离出炭角菌科真菌。然而，这些真菌的致病性及其在葡萄中引发疾病的可能性尚不清楚。进行了一系列致病性试验，以确定这些真菌是否为葡萄病原体。在所有实验中，尽管不同分离株的再分离频率和维管束变色的平均长度有所不同，但炭角菌科的物种均从发展中病斑边缘再次分离得到。葡萄生隐壳孢、黑纹炭角菌和葡萄顶枯病菌能够定殖于休眠藤条并引起维管束坏死。普尔曼隐球壳菌、葡萄生隐壳孢、黑纹炭角菌、惠特曼炭角菌和葡萄顶枯病菌感染新梢营养生长的嫩梢并引起病斑。俄勒冈炭角菌和疣状炭棒菌分离株产生的病斑与对照嫩梢和藤条产生的病斑无显著差异。这表明俄勒冈炭角菌和疣状炭棒菌对葡萄可能是腐生菌而非病原菌。
