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Abstract Detail

Understanding Plant Defense Strategies: Interplay Between Traditional Botanical Tools and Modern Analytical Approaches

Miranda-Perez, Adan [1], De-la-Mora, Marisol [1], Nunez-Farfan, Juan [1].

Local adaptation in the interaction between Trichobaris soror and Datura stramonium.

Variable spatial selection on plant defense and counter-defense of herbivores may give rise to coevolutionary arm races, thus producing local adaptation in some populations. Local adaptation implies that a population attains a higher fitness in its native locality than in foreign localities. We aimed to assess whether the annual plant Datura stramonium is locally adapted in relation to seed predation exerted by Trichobaris soror. We assessed the concentration of alkaloids (atropine and scopolamine) in plants of D. stramonium from 31 populations, and evaluated the levels of infestation by T. soror. We estimated the selection differential (S) of atropine and scopolamine in each population. Infestation by T. soror reduces the number of remaining sound seeds. We found that S correlates positively with scopolamine concentration across populations, suggesting that the among-population variation in chemical defense of D. stramonium is molded, in part, by T. soror. We further carried out a transplant experiment with two populations of D. stramonium to test for local adaptation under the “home-away” criterion. We detected local adaptation in one locality (Morelia). In contrast, T. soror infested more heavily its local population. Scopolamine concentration is positively associated with the number of sound seeds.

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1 - National Autonomous University of Mexico, Evolutionary Ecology, Circuito Exterior, Ciudad Universitaria, , Coyoacán, Mexico, CDMX, 04510, México

local adaptation
Datura stramonium
Trichobaris soror

Presentation Type: Symposium Presentation
Session: SY07, Understanding plant defense strategies: Interplay between traditional botanical tools and modern analytical approaches
Location: Chatham Ballroom - B/Savannah International Trade and Convention Center
Date: Tuesday, August 2nd, 2016
Time: 4:15 PM
Number: SY07007
Abstract ID:585
Candidate for Awards:None

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