研究论文
增温条件下花粉来源对红雉凤仙花生殖成功的影响
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- 西华师范大学西南野生动植物资源保护教育部重点实验室, 西华师范大学生命科学学院, 四川南充 637000
收稿日期: 2021-05-06
录用日期: 2021-11-17
网络出版日期: 2022-01-30
基金资助
国家自然科学基金(31600391)
Effect of pollen source on reproductive success of Impatiens oxyanthera under warming conditions
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- Key Laboratory of Southwest China Wildlife Resources Conservation (China West Normal University), Ministry of Education, College of Life Science, China West Normal University, Nanchong, Sichuan 637000, China
Received date: 2021-05-06
Accepted date: 2021-11-17
Online published: 2022-01-30
Supported by
National Natural Science Foundation of China(31600391)
摘要
花粉来源影响着植物的生殖成功和种群的遗传结构, 母体效应则有利于子代适应母代经历的环境。然而, 气候变暖背景下, 花粉来源联合母体效应对植物生殖成功的影响仍不明了。该研究以兼性异交的中国特有植物红雉凤仙花(Impatiens oxyanthera)为研究对象, 采用双因素随机区组设计, 设置母代增温(+0 ℃和+2 ℃)嵌套子代增温(+0 ℃、+2 ℃和+4 ℃)共6种实验处理, 探讨不同母代增温条件下子代增温对红雉凤仙花花粉来源限制的影响。结果显示: 红雉凤仙花异交的结实率和种子数均高于自交的相应值, 且随着子代增温幅度提升, 这2个值均呈现不同程度降低, 特别是自交结实率和种子数随子代增温明显降低, 而母代增温则减缓了自交引起的生殖成功率降低的效应。上述结果说明, 红雉凤仙花异交生殖成功率大于自交。子代增温显著降低了兼性异交植物自交的适合度, 母代增温可以减缓这种不利影响, 从而表现出对增温的跨代适应性。
本文引用格式
钟楠蝶, 王力, 肖杰, 王琼 . 增温条件下花粉来源对红雉凤仙花生殖成功的影响[J]. 植物生态学报, 2022 , 46(4) : 416 -427 . DOI: 10.17521/cjpe.2021.0169
Abstract
Aims Pollen source influences the reproductive success of plants and the genetic structure of their populations, and maternal effects facilitate the adaptation of offspring to the environmental conditions that their parental generation were exposed to. However, the effect of pollen source combined with maternal effects on reproductive success of plants remains unknown under climate warming.
Methods In this study, Impatiens oxyanthera, a facultative outcrossing plant endemic to China, was taken as the research object. This study was designed using a randomized block design with two factors (warmed at 0 and 2 °C in parental generation, warmed at 0, 2 and 4 °C in offspring generation). From these two factors, six treatment combinations were obtained, aiming to better understand the effects of warming treatments in offspring generation on pollen source limitation of I. oxyanthera under different warming treatments in parental generation.
Important findings The seed setting rate and seeds of allogamous treatments were all higher than the corresponding values of autogamous, and two values showed different degrees of decrease with the increase of offspring temperature, in particular, seed set rate and seed number of selfing decreased significantly with warming treatments in offspring generation, while warming treatments in parental generation moderated the decreasing effect of reproductive success caused by autogamouy. This results suggested that the reproductive success of allogamy was greater than that of autogamy. Warming treatments in the offspring generation significantly reduced the fitness of self-fertilization, but warming treatments in the parental generation could mitigate this adverse effects, thus showed adaptive transgenerational plasticity in responses to warming.
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