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首页> 外文会议>第四届国际板栗大会（Proceedings of Fourth International Chestnut Symposium) >Bark Reaction of Different Oak Species to Cryphonectria parasitica
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Bark Reaction of Different Oak Species to Cryphonectria parasitica

机译：不同橡木树种对寄生水晶的树皮反应

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摘要

Our main goal was to study the susceptibility of oak species to the plant pathogenic fungus Cryphonectria parasitica. Virulence of different isolates was examined on dormant sticks of 9 different oak species (Quercus spp.) and on European chestnut (Castanea sativa) as a control. Branches were infected with virulent isolates. The experiments were done in 4 repetitions. The treated branches were inoculated for 36 days, and then the size of caused cankers were measured. The necroses were ellipse shaped mostly. Shorter and longer diagonals of the ellipses were measured, and the size of the damaged bark surface was determined by using the ellipse calculation formula [(axb)xπ]. According to the results achieved red oak (Quercus rubra) was extremely susceptible to the fungus. Necrosis on the red oak caused by C. parasitica were significantly bigger in size than those were on the chestnut branches. Q. rubra and C. sativa were more susceptible than other tree species, and sessile oak (Q. petraea) and the pedunculate oak (Q. robur) also showed a great susceptibility. Nesroses were the smallest on Q. robur f.fastigiata.
机译：我们的主要目标是研究橡树种对植物病原真菌寄生phone虫（Cryphonectria parasitica）的敏感性。在9种不同橡木树种（Quercus spp。）和欧洲栗木（Castanea sativa）的休眠棒上检查了不同菌株的毒力。分支感染了强毒分离株。实验进行了4次重复。将处理过的分支接种36天，然后测量引起的溃疡的大小。坏死大部分为椭圆形。测量椭圆的较短和较长的对角线，并使用椭圆计算公式[（axb）xπ]确定损坏的树皮表面的大小。根据获得的结果，赤栎（Quercus rubra）对真菌极易感。由寄生寄生梭状芽胞杆菌引起的赤栎坏死的大小明显大于栗树枝上的坏死。红橡树和紫花苜蓿比其他树种更易感，无梗栎（Q. petraea）和花梗橡木（Q. robur）也表现出很大的敏感性。在Q. robur f.fastigiata上，Nesroses最小。

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