Chin J Plant Ecol ›› 2022, Vol. 46 ›› Issue (4): 416-427.DOI: 10.17521/cjpe.2021.0169

• Research Articles • Previous Articles     Next Articles

Effect of pollen source on reproductive success of Impatiens oxyanthera under warming conditions

ZHONG Nan-Die, WANG Li, XIAO Jie, WANG Qiong*()   

  1. 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:2021-05-06 Accepted:2021-11-17 Online:2022-04-20 Published:2022-01-30
  • Contact: WANG Qiong
  • Supported by:
    National Natural Science Foundation of China(31600391)


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.

Key words: warming, Impatiens oxyanthera, pollen source limitation, cross-pollination, self-pollination, transgenerational plasticity, reproductive success