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Abstract Detail

Empirical Approaches to Phylogenetic Comparative Methods in Plant Science

Eaton, Deren [1].

Comparative analysis of pollen-pistil relationships above and below the species-level in Chinese Pedicularis.

A positive correlation between pollen size and pistil length has been observed across many plant clades. Here I summarize this literature and also present new results that correct for the phylogenetic relatedness among species. Because this relationship is thought to reflect a tight coupling between pollen energy storage and the distance pollen tubes must grow from stigmas to ovules, de-coupling of pollen size and pistil lengths between divergent species or populations can inhibit successful pollination. Chinese Pedicularis exhibit an extravagant diversity of floral forms, with pistil lengths that vary greatly both among and within species. I show that pollen size and pistil lengths are correlated across species, as well as among populations within one widespread and variable species, Pedicularis cranolopha. Experimental crosses show that larger pollen grows faster, suggesting an advantage during male-to-male gametophyetic competition in long-styled flowers. 

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1 - Yale University, Ecology & Evolutionary Biology, New Haven, CT, 06511, USA

Pollen tube.

Presentation Type: Symposium or Colloquium Presentation
Session: C1
Location: Summit/Boise Centre
Date: Monday, July 28th, 2014
Time: 2:00 PM
Number: C1003
Abstract ID:326
Candidate for Awards:None

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