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首页> 外文期刊>Plant Pathology >Effects of temperature on maturation of pseudothecia of Leptosphaeria maculans and L.biglobosa on oilseed rape stem debris
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Effects of temperature on maturation of pseudothecia of Leptosphaeria maculans and L.biglobosa on oilseed rape stem debris

机译：温度对油菜籽茎残片上斑节对虾和大叶假单胞菌假成熟的影响

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摘要

Effects of temperature on maturatin of pseudothecia of Leptosphaeria maculans and L.biglobosa,closely related species which coexist on UK oilseed rape,were investigated.Stages in pseudothecial maturation on naturally infected oilseed rape debris were examined,both in controlled environments (5-10,15 or 20 deg C)under continuous wetness and in natural conditions (debris exposed in September and December 2000,and July,September and November 2002).Pseudothecia sampled weekly were assigned to maturatin classes A (asci undifferentiated),B (asci differentiated),C (ascospores differentiated)or D(ascospores mature).Progress in pseudothecial matuaration (assessed by time until 50% of pseudothecia reached each class)was similar for L.maculans and L.biglobosa at 15-20 deg C,but L.biglobosa matured more slowly at <10 deg C.Maturatin time decreased almost linearly with temperature from 5 to 20 deg C under continuous wetness but was longer in natural consitions,especially when periods of dry weather occurred.Differences in pseudothecial maturation are likely to contribute to epidemiological differences between L.maculans and L.bigloboa,which may explain their coexistence.It is appropriate to use the degree-day approximation to assess pseudothecial maturation at temperatures between 5 and 20 deg C,providing debris is wet.
机译：研究了温度对在英国油菜上共存的近缘种Leptosphaeria maculans和L.biglobosa假蝇的成熟状态的影响。在受控环境下（5-10，在连续潮湿和自然条件下（2000年9月和2000年7月以及2002年7月，9月和2002年11月暴露的碎片）在15或20摄氏度下进行的实验。每周抽样的假性皮层被分为成熟型A级（未分化的asci），B组（分化的asci） L.maculans和L.biglobosa在15到20摄氏度时，假性成熟度的进展（按时间评估，直到50％的假性神鞘达到每个等级）相似，但L.大叶龙虾在<10摄氏度时成熟更慢。在持续潮湿的情况下，成熟温度随着温度从5到20摄氏度线性下降，但在自然条件下则更长，特别是在干燥天气期间假神成熟度的差异很可能会导致L.maculans和L.bigloboa之间的流行病学差异，这可能解释了它们的共存关系。使用度日近似法评估5至20摄氏度温度下的假神成熟度是适当的。 ，如果杂物是湿的。

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