A Trip Back Home: Resistance to Herbivores of Native and Non-Native Plant Populations of Datura stramonium
Por:
Nunez-Farfan, J, Velazquez-Marquez, S, Torres-Garcia, JR, De-la-Cruz, IM, Arroyo, J, Valverde, PL, Flores-Ortiz, CM, Hernandez-Portilla, LB, Lopez-Cobos, DE, Matias, JD
Publicada:
1 ene 2024
Resumen:
When colonizing new ranges, plant populations may benefit from the absence of the checks imposed by the enemies, herbivores, and pathogens that regulated their numbers in their original range. Therefore, rates of plant damage or infestation by natural enemies are expected to be lower in the new range. Exposing both non-native and native plant populations in the native range, where native herbivores are present, can be used to test whether resistance mechanisms have diverged between populations. Datura stramonium is native to the Americas but widely distributed in Spain, where populations show lower herbivore damage than populations in the native range. We established experiments in two localities in the native range (Mexico), exposing two native and two non-native D. stramonium populations to natural herbivores. Plant performance differed between the localities, as did the abundance of the main specialist herbivore, Lema daturaphila. In Teotihuacan, where L. daturaphila is common, native plants had significantly more adult beetles and herbivore damage than non-native plants. The degree of infestation by the specialist seed predator Trichobaris soror differed among populations and between sites, but the native Ticuman population always had the lowest level of infestation. The Ticuman population also had the highest concentration of the alkaloid scopolamine. Scopolamine was negatively related to the number of eggs deposited by L. daturaphila in Teotihuacan. There was among-family variation in herbivore damage (resistance), alkaloid content (scopolamine), and infestation by L. daturaphila and T. soror, indicating genetic variation and potential for further evolution. Although native and non-native D. stramonium populations have not yet diverged in plant resistance/constitutive defense, the differences between ranges (and the two experimental sites) in the type and abundance of herbivores suggest that further research is needed on the role of resource availability and adaptive plasticity, specialized metabolites (induced, constitutive), and the relationship between genealogical origin and plant defense in both ranges.
Filiaciones:
Nunez-Farfan, J:
Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, Mexico
Velazquez-Marquez, S:
Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, Mexico
Torres-Garcia, JR:
Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, Mexico
CONAHCYT, IPN, CIIDIR, Jiquilpan 59510, Michoacan, Mexico
De-la-Cruz, IM:
Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, Mexico
Swedish Univ Agr Sci, Dept Plant Protect Biol, S-23053 Alnarp, Sweden
Arroyo, J:
Univ Seville, Dept Biol Vegetal & Ecol, Seville 41080, Spain
Valverde, PL:
Univ Autonoma Metropolitana Iztapalapa, Dept Biol, Mexico City 09310, DF, Mexico
Flores-Ortiz, CM:
Univ Nacl Autonoma Mexico, Plant Physiol Lab, UBIPRO, FES Iztacala, Tlalnepantla 54090, Estado De Mexic, Mexico
Hernandez-Portilla, LB:
Univ Nacl Autonoma Mexico, Plant Physiol Lab, UBIPRO, FES Iztacala, Tlalnepantla 54090, Estado De Mexic, Mexico
Lopez-Cobos, DE:
Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, Mexico
Matias, JD:
Univ Nacl Autonoma Mexico, Dept Ecol Evolut, Inst Ecol, Mexico City 04510, DF, Mexico
gold, All Open Access; Gold Open Access
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