Abstract
Micropopulation differences in phenol content between intertidal and subtidal individuals of the kelp Lessonia nigrescens were found. Subtidal plants showed: (1) significantly higher phenol content than intertidal individuals,in vegetative and reproductive tissues, (2) intra-plant differences, with higher content in apical frond tissues, (3)higher resistance to consumption by herbivorous fishes. The microscopic progeny of subtidal plants showed thesame trend as adult plants: (1) haploid spores from subtidal plants had higher phenol content than spores fromintertidal individuals, and (2) the microscopic sporophytes derived from subtidal spores and gametophytes wereless consumed by herbivorous snails (Tegula tridentata) than those derived from intertidal plant propagules. Noincrease in phenol content was detected after mechanical injury to experimental fronds, or after transplantation tothe subtidal environment.
In addition to the absence of inducible responses, the different phenol content between intertidal and subtidalindividuals, in adult diploid plants and also in the haploid progeny, suggests that both environments differ somewayenough to fix the mentioned features on the plants of Lessonia nigrescens. It is likely that the differences in herbivorybetween the two distributional extremes contributed to the observed pattern.
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Martínez, E.A. (1996). Micropopulation differentiation in phenol content and susceptibility toherbivory in the Chilean kelp Lessonia nigrescens(Phaeophyta, Laminariales). In: Lindstrom, S.C., Chapman, D.J. (eds) Fifteenth International Seaweed Symposium. Developments in Hydrobiology, vol 116. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1659-3_28
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DOI: https://doi.org/10.1007/978-94-009-1659-3_28
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