Marshall Diane L, Tyler Anna P, Abrahamson Nathan J, Avritt Joy J, Barnes Melanie G, Larkin Leah L, Medeiros Juliana S, Reynolds Jerusha, Shaner Marieken G M, Simpson Heather L, Maliakal-Witt Satya
Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA.
Sex Plant Reprod. 2010 Dec;23(4):325-36. doi: 10.1007/s00497-010-0146-8. Epub 2010 Jun 19.
Although increases in atmospheric [CO(2)] are known to affect plant physiology, growth and reproduction, understanding of these effects is limited because most studies of reproductive consequences focus solely on female function. Therefore, we examined the effects of CO(2) enrichment on male function in the annual Raphanus sativus. Pollen donors grown under elevated [CO(2)] initially sired a higher proportion of seeds per fruit than ambient [CO(2)]-grown plants when each was tested against two different standard competitors; however, by the end of the 5-month experiment, these pollen donors sired fewer seeds than ambient [CO(2)]-grown plants and produced a lower proportion of viable pollen grains. The results of this experiment confirm that elevated [CO(2)] can alter reproductive success. Additionally, the change in response to elevated [CO(2)] over time varied among pollen donor families; thus, changes in [CO(2)] could act as a selective force on this species.
尽管已知大气中[CO₂]浓度升高会影响植物的生理、生长和繁殖，但由于大多数关于繁殖后果的研究仅关注雌性功能，所以对这些影响的了解有限。因此，我们研究了CO₂浓度升高对一年生萝卜雄性功能的影响。当在两种不同的标准竞争条件下进行测试时，在高[CO₂]浓度下生长的花粉供体最初每个果实所结种子的比例高于在环境[CO₂]浓度下生长的植物；然而，到5个月实验结束时，这些花粉供体所结种子比在环境[CO₂]浓度下生长的植物少，且产生的有活力花粉粒比例更低。该实验结果证实，高[CO₂]浓度可改变繁殖成功率。此外，随着时间推移，不同花粉供体家族对高[CO₂]浓度的反应变化存在差异；因此，[CO₂]浓度变化可能对该物种起到选择作用。
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