Abstract Detail

Physiology & Ecophysiology

Dahl, Julian [1], Lish, Barbara [1], Kim, Natalie [1], Heschel, M. Shane [2].

Flower color, UV protection, and fitness trade-offs in Scarlet Gilia (Ipomopsis aggregata).

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 microenvironmental effects on seed count and photosystem efficiency, which may be due to differing canopy cover. This research highlights a reproductive and survivorshiop 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, Organismal Biology
2 - Colorado College, Biology, 14 E. Cache La Poudre St., Colorado Springs, CO, 80903, USA

Keywords:
UV
Anthocyanin
Fitness.

Presentation Type: Poster
Session: P, Physiology & Ecophysiology
Location: Exhibit Hall/Omni Hotel
Date: Monday, June 26th, 2017
Time: 5:30 PM This poster will be presented at 5:30 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: PPE005
Abstract ID:221
Candidate for Awards:None