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- Title
Pollen allelopathy among sympatric grassland species: <em>in vitro</em> evidence in <em>Phleum pratense</em> L.
- Authors
Murphy, Stephen D.; Aarssen, Lonnie W.
- Abstract
Pollen extracts from five locally-common grassland species in eastern Ontario, Canada were tested for <em>in vitro</em> allelopathic effect on the pollen germination of 17 sympatric target species in 1987. The flowering phenologies of the test and target species were recorded to determine if any phenologically-divergent species showed evidence of in vitro pollen-allelopathic interactions. <em>Phleum pratense<em> L. demonstrated pollen-allelopathic effects on all targets except <em>Linaria vulgaris</em> Hill. <em>P. pratense</em> L. also exhibited significant phenological divergence with seven of the target species. Pollen extracts from <em>Agrostis stolonifera</em> L., <em>Melilotus alba</em> Desr., and <em>Vicia cracca</em> L. inhibited pollen germination in some of the target species, but the results suggest that these effects were pH-mediated. The pollen extract of <em>Erigeron annuus</em> (L.) Pers. did not cause inhibition of pollen germination in any of the target species. Further tests with pollen extract of <em>P. pratense</em> and another 23 sympatric target species were performed in 1988. Pollen germination was significantly inhibited in all but two of these species: <em>A. stolonifera<em> and <em>P. pratense</em>. Hence, the pollen of <em>P. pratense</em> was not auto-allelopathic. The breeding system, relatively tall growth habit and relatively large quantity of pollen produced all support the in vitro evidence of <em>P. pratense</em> as a Pollen-allelopathic species.
- Subjects
ONTARIO; CANADA; POLLEN; GERMINATION; PLANT phenology; CREEPING bentgrass; ALLELOPATHY
- Publication
New Phytologist, 1989, Vol 112, Issue 2, p295
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/j.1469-8137.1989.tb02385.x