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. Log in to add this item to your schedule
1 - Yale University, Ecology & Evolutionary Biology, New Haven, CT, 06511, USA
Keywords: pollination Pedicularis incompatibility 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 |