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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 inthe 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. aggregataindividuals 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.

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


Presentation Type: Poster
Session: P, Physiology & Ecophysiology
Location: Grand Ballroom - Exhibit Hall/Mayo Civic Center
Date: Monday, July 23rd, 2018
Time: 5:30 PM This poster will be presented at 6:15 pm. The Poster Session runs from 5:30 pm to 7:00 pm. Posters with odd poster numbers are presented at 5:30 pm, and posters with even poster numbers are presented at 6:15 pm.
Number: PPE002
Abstract ID:293
Candidate for Awards:None

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