Abstract

The phenodata, thermal requirements, and their regional parameters are compared for six seasonal developmental stages of two ecologically distinct clematis species, Clematis integrifolia and C. recta. The thermal requirements to be compared are determined by an original technique based on the data of phenological observations carried out in 1990–2014 in Galich’ya Gora Nature Reserve (Lipetsk oblast). In C. recta, all of the registered stages except the stage of mass seed ripening occurred later than in C. integrifolia. It is found that C. recta, being a woodland species, requires more heat for its development than C. integrifolia, which grows in grassy habitats. At the stages of the beginning of vegetation, blossoming, and the beginning of seed ripening, this is manifested by higher values of both thermal constants and regional parameters of development. It is assumed also that the development of C. recta did not pause in winter and that it is exactly in this time that flower buds formed. The results of the study indicate that the adaptation of the two species to different environmental conditions, which took place in the course of evolution, has led to physiological changes that are reflected, in particular, in a shift in the thermal requirements for development.

中文翻译：

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Galich'ya Gora自然保护区（利佩茨克州）条件下开发的两种铁线莲（毛un科）物种的物候特征和热需求

摘要

比较了两种生态上不同的铁线莲物种铁线莲和直立线虫的六个季节发育阶段的物候数据，热量需求及其区域参数。根据1990-2014年在Galich'ya Gora自然保护区（利佩茨克州）进行的物候观测数据，采用原始技术确定要比较的热量需求。在C. recta中，除大量种子成熟阶段外，所有登记阶段都比integrifolia慢。结果发现，作为林地物种的C. recta比整形C. integrifolia需要更多的热量。，生长在草丛中。在植被开始，开花和种子成熟开始的阶段，这表现为较高的热常数值和发育的区域参数。还可以假定直立梭状芽胞杆菌的发育在冬季没有停止，而正是在这个时候才形成花蕾。研究结果表明，两个物种在进化过程中对不同环境条件的适应，导致了生理变化，这尤其反映在对发展的热需求的转变中。