植物生态学报 ›› 2006, Vol. 30 ›› Issue (6): 1054-1063.DOI: 10.17521/cjpe.2006.0134

• 论文 • 上一篇    下一篇

植物有性生殖对大气CO2浓度变化响应的研究进展

滕年军1,2,3, 陈彤1,3, 林金星1,*()   

  1. 1 中国科学院植物研究所光合作用与环境分子生理学重点实验室,北京 100093
    2 南京农业大学园艺学院,南京 210095
    3 中国科学院研究生院,北京 100049
  • 收稿日期:2005-10-19 接受日期:2006-01-14 出版日期:2005-10-19 发布日期:2006-11-30
  • 通讯作者: 林金星
  • 作者简介:* E-mail: linjx@ibcas.ac.cn
  • 基金资助:
    国家自然科学基金项目(90211005)

A REVIEW ON RESPONSES OF PLANT SEXUAL REPRODUCTION TO ELEVATED CO2

TENG Nian-Jun1,2,3, CHEN Tong1,3, LIN Jin-Xing1,*()   

  1. 1 Key Laboratory of Photosynthesis and Environmental Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
    2 College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
    3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2005-10-19 Accepted:2006-01-14 Online:2005-10-19 Published:2006-11-30
  • Contact: LIN Jin-Xing

摘要:

比较详细地概述了过去数十年关于在大气CO2浓度升高条件下,植物有性生殖特性发生变化的主要研究成果。随着植物相对生长速率加快,植株达到有性生殖所需形体大小的时间变短,开花期提前,生殖器官的生物量也相应提高,其主要表现为开花数量、花粉和花蜜产量、果实数量与大小、种子大小与产量等均有不同程度的增加。对大多数农作物而言,种子产量的增加主要通过种子数量的增加,而与种子大小变化关系不大。通常,高浓度CO2对豆科植物种子含氮量影响比较小,却能显著地降低非豆科植物种子含氮量。不同类型植物的生殖生物量增加趋势存在一定的规律性,如不定型植物>定型植物,豆科植物>C3非豆科植物> C4植物,栽培植物>野生植物。针对国内外对CO2浓度升高影响植物有性生殖特性的研究中存在的不足,该文提出了今后研究应该注意的问题。

关键词: CO2浓度升高, 有性生殖, 植物响应, 种子质量, 生殖特性

Abstract:

Plant reproductive traits are key characteristics for predicting the impacts of global changes on plant community, agro-ecosystem and plant ecological fitness. This review seeks to integrate current results about the effects of elevated CO2 on plant reproductive traits in detail based on the existing experimental data in the past few decades. Earlier investigations demonstrate that elevated CO2 advances the flowering time through increasing relative growth rate and accelerating developmental process. All the numbers of flowers, fruits, and seeds, the mass of seed as well as the production of pollen and nectar of plants have been found to be stimulated by CO2 enrichment. It is further revealed that the increase in plant yields results largely from an increase in seed number rather than from individual seed mass. Elevated CO2 concentrations have little effect on seed [N] of legumes, but significantly reduce seed [N] of most nonlegumes. Contents of proteins, amino acids, and some mineral ions usually decrease in seeds of most nonlegumes. Different functional groups of plants are often found to differ markedly in their reproductive responses to elevated CO2: 1) crops allocate more mass to reproduction and produce more fruits and seeds than do undomesticated species; 2) indeterminate plants have stronger responses to elevated CO2 in comparison with determinate species; 3) legumes are most responsive to elevated CO2, followed by nonlegume C3 species, then C4 species. Based on the data available, it seems rational to believe that changes in plant reproductive traits resulting from elevated CO2 may alter the competitive hierarchy, the species composition, and hence the functioning of plant community. Finally, some issues noteworthy for future researches in this field are also put forward with reference to the existing unsolved questions.

Key words: Elevated CO2, Sexual reproduction, Plant responses, Seed quality, Reproductive traits