甘草生活史型的划分

The classify of the liquorice life cycle form

探讨了甘草生活史型的定性和定量划分方法并对其结果进行了对比,结果如下:生活史型定性划分法基于生态幅与扰动程度对甘草生活的生境进行划分,将野生甘草、半野生甘草和栽培甘草分别划分为C、CVS和S生活史型。生活史型定量划分法是将生长于不同生境中甘草的营养生长、克隆生殖和有性生殖形态性状参数进行主成分分析,根据主成分得分比例划分生活史型。野生甘草定量划分结果为C0.4552S0.3150V0.2297型,总体上趋于C型生活史型;半野生甘草划分结果为C0.3540V0.3534S0.2926型,其营养生长、无性生殖和有性生殖发育比较均衡,属于CVS过渡生活史型;栽培甘草划分结果为V0.8931S0.0569C0.0500型,为比较典型的V生活史型。栽培甘草的定性、定量划分结果不一致的原因主要在于生长年限太少,克隆生殖和有性生殖均不发达。对植物生活史型的定量划分方法比定性划分法更为可靠、客观。

At the plant evolutional ecology research territory, it is an important progress for the plant life history research from the reproduction strategy to the life history strategy. There was not give any reasonable explanations for what resulted the plants with different life history strategies adapted to different habitats. The existing results of the life history （or life cycle） pattern and the life history variation all indicated that the research for the forming process, classify and reciprocal transformation of the plant life cycle form were necessary. According to the previous results, the method of qualitative habitat classify for the liquorice life cycle form had been adopted, which emphasized the action of the surroundings stress and disturbance. By using the qualitative classify method of the life cycle form, the types of the habitat where the liquorice existed had been divided, then the life cycle forms of wild liquorice, semi-wild liquorice and cultivated liquorices had been classified respectively as three types too. These were C, CVS and S life cycle form. The quantitative classify method for plant life cycle form was the principal component analysis （PCA）. The trait parameters of the vegetative growth, the elonal reproduction and the sexual reproduction of liquorice in different habitats had been calculated by this method, and the liquorice life cycle forms had been divided by score proportion of PCA. Based on the quantitative classify method, the life cycle form of wild liquorice was C0.4552 S0.3150 V0.2297, being trend in the C life cycle form in the mass; The life cycle form of semi-wild liquorice was C0.3540 V0.3534 S0.2926, its vegetative growth, clonal reproduction and sexual reproduction developed more balanced and belonged to the transition life form （CVS）; The life cycle form of cultivated liquorice was V0.8931 S0.0569 C0.0500, which is the typical life cycle form of V. Contrast on methods of qualitative and quantitative classify of the life cycle form, the research results of quantitative classify method for the liquorice life cycle forms were were more credibility or objectivity than that of qualitative classify method.