泡沙参复合体(桔梗科)的物种生物学研究: I.表型的可塑性

中国科学院大学学报

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泡沙参复合体(桔梗科)的物种生物学研究: I.表型的可塑性

葛颂, 洪德元

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1994-11-18 发布日期:1994-11-18
通讯作者: 葛颂

Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae). Ⅰ. Phenotypic Plasticity

Ge Song, Hong De-yuan

Received:1900-01-01 Revised:1900-01-01 Online:1994-11-18 Published:1994-11-18
Contact: Ge Song

摘要/Abstract

摘要：

表型可塑性是生物变异中由环境引起的一种变异，是植物适应的一种重要方式。对沙参属这样一个形态上复杂多变，分类上很难处理的类群，研究其表型可塑性不仅为探讨性状变异、判断其系统学意义及选择可靠的分类性状提供了有益的资料，而且有助于揭示沙参属植物变异、适应和进化的机制。本文从泡沙参复合体中选择了6个居群，利用播种和移栽试验，通过对不同个体和居群在一致条件下的表现及野外和移栽后的对比，对根、茎、叶，花和果等形态性状的表型可塑性进行了初步的观测分析。结果表明，一些叶片、花部和果实性状具有较大的发育可塑性，尤其是叶形、花萼裂片不仅发育变化大，而且随发育过程定向变化。环境可塑性较大的性状主要是根、茎、花序分枝等性状，而叶片、花部、果实和种子性状的环境饰变能力都较小。最后，对泡沙参复合体形态性状的变异从发育可塑性和环境可塑性的角度进行了讨论。

关键词: 表型可塑性, 泡沙参复合体, 形态性状, 变异

Abstract:

Phenotypic plasticity is the environmental modification of genotypic expression

and an important means by which individual plants respond to environmental heterogeneity.

The study of phenotypic plasticity in the genus Adenophora, which is very complicated taxo-

nomically because of great morphological variation, proves to be helpful in both investigating

the phenotypic variation so as to evaluate potential taxonomic value of their characters and

providing important sources of information on the variation, adaptation and evolution of the

genus. Twenty-three populations representing all the six species in Adenophora potaninii

complex were transplanted into the garden. Of them six populations were selected for study-

ing their performance in the field and in the garden, in addition to cultivation experiment

under different treatments. The results show that there exists considerable developmental

plasticity in some leaf, floral and capsule characters. In particular, the leaf shape and length

of calyx lobe display significant developmental variation with the maximum being three times

as great as the minimum, which is noteworthy because they were previously considered as

diagnostic. The characters of root, caudex, stem and inflorescence are found to be very

plastic, especially the root diameter, the number of stems, stem height and inflorescence

length with great environmental plasticity. In addition, the populations from different habi-

tats show distinct amounts of plasticity. On the contrary, the characters of leaf, floral, cap-

sule and seed are less influenced by environments. It seems that the considerable variation in

the characters of leaf is attributed mainly to genetic differences. Finally, the phenotypic

plasticity of morphological characters of A. potaninii complex and its taxonomic significance

is discussed.

Key words: Phenotypic plasticity, Adenophora potaninii complex, Morphological characters, Variation

葛颂, 洪德元. 泡沙参复合体(桔梗科)的物种生物学研究: I.表型的可塑性[J]. 中国科学院大学学报.

Ge Song, Hong De-yuan. Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae). Ⅰ. Phenotypic Plasticity[J]. .

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泡沙参复合体(桔梗科)的物种生物学研究: I.表型的可塑性

Biosystematic Studies on Adenophora potaninii Korsh. Complex (Campanulaceae). Ⅰ. Phenotypic Plasticity

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