Pollen limitation and reproductive incompatibility system in a critically endangered tree, Polylepis incarum (Bitter) M. Kessler & Schmidt-Leb (Rosaceae)

IF 0.9 Q4 ECOLOGY Neotropical Biodiversity Pub Date : 2021-01-01 DOI:10.1080/23766808.2021.1940050
Cecilia L. López, Alejandra I. Domic, C. Mayta, E. García, Jorge Quezada, S. C. Gallegos
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引用次数: 2

Abstract

ABSTRACT Anemophilous species depend on wind for sexual reproduction. When plants do not receive enough pollen and/or pollen has poor quality, they may experience pollen limitation. This can reduce the production of fruits and seeds with negative consequences on population dynamics. The self-compatibility system also plays an important role on the likelihood of a species suffering pollen limitation as it determines if plants can produce fruits and seeds in the absence of compatible mates. Here, we studied the breeding system of the Andean anemophilous tree Polylepis incarum, a critically endangered species endemic to Lake Titicaca. We conducted controlled experimental pollination experiments and florescence microscopy analysis to assess whether pollen limitation and the incompatibility system constrain fruit and seed production. Results showed that the seed set is limited by pollen availability, that P. incarum exhibits a pre-zygotic compatibility system and early inbreeding depression manifested during seed development. Therefore, self-pollination is a factor that could be partially associated with the production of non-viable seeds. Graphical abstract
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一种极度濒危树木的花粉限制和生殖不相容系统,Polylepis incarum(Bitter)M.Kessler&Schmidt Leb(Rosaceae)
嗜贫血症物种依靠风力进行有性繁殖。当植物没有收到足够的花粉和/或花粉质量差时,它们可能会受到花粉限制。这会减少水果和种子的产量,对种群动态产生负面影响。自亲和系统对一个物种遭受花粉限制的可能性也起着重要作用,因为它决定了植物是否能在没有亲和配偶的情况下产生果实和种子。在这里,我们研究了安第斯嗜风树Polylapis incarum的繁殖系统,这是一种喀喀湖特有的极度濒危物种。我们进行了对照实验授粉实验和花期显微镜分析,以评估花粉限制和不亲和系统是否限制了果实和种子的生产。结果表明,种子的结实受到花粉有效性的限制,P.incarum在种子发育过程中表现出合子前亲和系统和早期近亲繁殖抑制。因此,自花授粉是一个可能与产生不可存活种子部分相关的因素。图形摘要
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来源期刊
Neotropical Biodiversity
Neotropical Biodiversity Environmental Science-Ecology
CiteScore
1.80
自引率
0.00%
发文量
39
审稿时长
24 weeks
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