Self-pollination, style length development and seed set in self-compatible Asteraceae: evidence from Senecio vulgaris L

Love, John, Graham, Sean, Irwin, Judith, Ashton, Paul, Bretagnolle, Francois and Abbott, Richard (2016) Self-pollination, style length development and seed set in self-compatible Asteraceae: evidence from Senecio vulgaris L. Plant Ecology and Diversity. pp. 1-9. ISSN 1755-0874 DOI https://doi.org/10.1080/17550874.2016.1244576

[img]
Preview
Text
Self pollination style length development and seed set in self compatible Asteraceae evidence from S vulgaris L Love et al 2016.pdf - Published Version
Available under License Creative Commons Attribution.

Download (720kB) | Preview

Abstract

Background: Variation in style length has been reported in Senecio vulgaris and has been associated with outcrossing rate. Aims: To determine if (i) long styles lack germinated pollen on stigmas left to self-pollinate, (ii) successful self-pollination causes styles to stop elongating and shrink in length and (iii) seed set increases with the amount of pollen deposited on stigmas. Methods: Determined germinated self-pollen on stigmas of long and short styles after auto-self-pollination; scored style length over 48 h in self-pollinated and non-pollinated florets; recorded seed set after placing different amounts of pollen on stigmas. Results: Most long-styled florets had zero or low amounts of germinated pollen on stigmas in contrast to most short-styled florets. Styles initially elongated to the same length in self-pollinated and non-pollinated florets, then shrank in length in self-pollinated florets while continuing to elongate in non-pollinated florets. Seed set increased with number of pollen grains deposited on stigmas. Conclusions: Successful self-pollen deposition and/or germination on stigmas of S. vulgaris are indicated by presence of short styles, whereas the opposite is indicated by presence of long styles in florets left to self-pollinate. Self-pollination causes styles to shrink after initially elongating. Seed set is dependent on the amount of pollen deposited on stigmas.

Item Type: Article
Subjects: Q Science > QK Botany
Divisions: Biology
Date Deposited: 21 Nov 2016 14:12
URI: http://repository.edgehill.ac.uk/id/eprint/8170

Archive staff only

Item control page Item control page