期刊
PLANTS-BASEL
卷 9, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/plants9050640
关键词
pollen limitation; supplemental hand-pollination; seed number; seed weight; floral traits; wet meadow
资金
- Czech Science Foundation [GA CR 16-12243S, 20-16499S]
- Charles University [PRIMUS/17/SCI/8, UNCE204069]
- long-term research development project of the Czech Academy of Sciences [RVO 67985939]
The deficiency of pollen grains for ovule fertilization can be the main factor limiting plant reproduction and fitness. Because of the ongoing global changes, such as biodiversity loss and landscape fragmentation, a better knowledge of the prevalence and predictability of pollen limitation is challenging within current ecological research. In our study we used pollen supplementation to evaluate pollen limitation (at the level of seed number and weight) in 22 plant species growing in a wet semi-natural meadow. We investigated the correlation between the pollen limitation index (PL) and floral traits associated with plant reproduction or pollinator foraging behavior. We recorded significant pollen limitation for approximately 41% of species (9 out of 22 surveyed). Seven species had a significant positive response in seed production and two species increased in seed weight after pollen supplementation. Considering traits, PL significantly decreased with the number of pollinator functional groups. The relationship of PL with other examined traits was not supported by our results. The causes of pollen limitation may vary among species with regard to (1) different reproductive strategies and life history, and/or (2) temporary changes in influence of biotic and abiotic factors at a site.
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