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VARIABLE CHEMISTRY AND HERBIVORY OF PONDEROSA PINE CONES

机译:蓬松松球茎的可变化学和除草剂

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We measured the terpenoid chemistry, cone insect distribution, and the relationship between these two parameters in the seed cones of ponderosa pine. Analyses of mono-, sesqui-, and diterpenes from four separate sites revealed high amounts of terpenoid diversity and variation. The majority of this variation occurred among trees within sites, but differences were also seen among sites and among cone clusters from individual trees. Cone insect distributions differed substantially in both time and space, with significant differences seen between two points in time and between five sites. Negative correlations existed between levels of cone insect herbivory and both a monoterpene and a diterpene factor at one site, indicating that these herbivores may be one reason that ponderosa pine maintains the high levels of chemical variation observed.
机译:我们测量了萜类化合物的化学性质,锥体昆虫的分布以及黄松松种子锥体中这两个参数之间的关系。对四个不同部位的单萜,倍半萜和二萜进行分析发现,大量的萜类化合物具有多样性和变异性。这种变化的大部分发生在站点内的树木之间,但是在站点之间以及来自单个树木的圆锥簇之间也看到了差异。锥虫的分布在时间和空间上都存在很大差异,在两个时间点之间和五个位置之间都存在显着差异。锥虫草食动物的水平与一个部位的单萜和二萜因子之间存在负相关,表明这些草食动物可能是美国黄松保持高水平化学变化的原因之一。

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