Abstract Detail



Physiology & Ecophysiology

Dahl, Julian [1], Brown, Keirsten [1], Barbara, Lish [1], Heschel, M. Shane [1].

Floral color dimorphism and anthocyanin in Ipomopsis aggregata: Fitness and resistance to UV radiation damage.

Plants require access to photosynthetically active radiation (PAR), which also exposes them to potentially damaging ultraviolet wavelengths.  Anthocyanin is a secondary compound which provides red coloration for flowers, which attracts hummingbird pollinators, and has been shown to absorb light in the UV spectrum.  Ipomopsis aggregata displays flower color varying from pink to scarlet red, correlated with anthocyanin content.  In this study, we investigate the UV protective qualities of I. aggregata individuals with scarlet flowers (dark-colored) compared to plants with pink flowers (light-colored) using a combination of field observations (Manitou Experimental Forest) and in situ experimental manipulations.  We found that dark-colored individuals have higher photosystem efficiency, germination rates, and seed mass than light-colored individuals.  We also found significant micro-environmental effects on seed count and photosystem efficiency, which may be due to differing canopy cover.  This research highlights a reproductive and survivorship trade-off, seemingly connected directly to flavonoid content, between pollinator attraction and protection from UV damage in a mid-elevation plant population.


1 - Colorado College - Dept of Organismal Biology & Ecology (OBE), 14 E Cache La Poudre St, Colorado Springs, CO, 80903, United States

Keywords:
Anthocyanin
UV
fitness.

Presentation Type: Poster
Number: PPE002
Abstract ID:293
Candidate for Awards:None


Copyright © 2000-2018, Botanical Society of America. All rights reserved