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Abstract:

Background and Aims Studies of phenotypic plasticity in plants have mainly focused on (1) the effect of environmental variation on whole-plant traits related to the number of modules rather than on (2) the phenotypic consequences of environmental variation in traits of individual modules. Since environmental and developmental factors can produce changes in traits related to the mating system, this study used the second approach to investigate whether within-individual variation in herkogamy-related traits is affected by the environment during plant development in two populations of Datura stramonium, an annual herb with a hypothesized persistent mixed mating system, and to determine which morphological traits may promote self-fertilization. Methods Full-sib families of two Mexican populations of D. stramonium, with contrasting ecological histories, were grown under low, mid and high nutrient availability to investigate the effects of genetic, environmental and within-plant flower position on flower size, corolla, stamen and pistil lengths, and herkogamy. Key Results Populations showed differences in familial variation, plasticity and familial differences in plasticity in most floral traits analysed. In one population (Ticuman), the effect of flower position on trait variation varied among families, whereas in the other (Pedregal) the effect of flower position interacted with the nutrient environment. Flower size varied with the position of flowers, but in the opposite direction between populations in low nutrients; a systematic within-plant trend of reduction in flower size, pistil length and herkogamy with flower position increased the probability of self-fertilization in the Pedregal population. Conclusions Besides genetic variation in floral traits between and within populations, environmental variation affects phenotypic floral trait values at the whole-plant level, as well as among flower positions. The interaction between flower position and nutrient environment can affect the plant's mating system, and this differs between populations. Thus, reductions in herkogamy with flower positions may be expected in environments with either low pollinator abundance or low nutrients. © The Author 2017.

Registro:

Documento: Artículo
Título:Flower-level developmental plasticity to nutrient availability in Datura stramonium: Implications for the mating system
Autor:Camargo, I.D.; Nattero, J.; Careaga, S.A.; Núñez-Farfán, J.
Filiación:Laboratorio de Gendtica Ecológica y Evolución, Departamento de Ecologiá Evolutiva, Universidad Nacional Autónoma de Mdxico, Mexico City, 04510, Mexico
Departamento de Ecologiá y Territorio, Facultad de Estudios Ambientales y Rurales, Pontificia Universidad Javeriana, Bogotá, 110231594, Colombia
Instituto de Ecologiá, Gendtica y Evolución de Buenos Aires, EGEC1428EGA, Argentina
Comisión Nacional para El Conocimiento y Uso de la Biodiversidad, Mexico City, 14010, Mexico
Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, United States
Palabras clave:complete selfing; Datura stramonium; flower-level developmental reaction norms; herkogamy; mating system; nutrient availability; population variation; probability of self- A nd cross-fertilized flowers; reproductive assurance.; within-individual variation; annual plant; developmental biology; fertilization (reproduction); floral trait; flower; genetic variation; individual variation; nutrient availability; phenotypic plasticity; probability; reproductive strategy; Mexico [Mexico (NTN)]; Mexico [North America]; Pedregal; Datura stramonium; anatomy and histology; Datura stramonium; environment; flower; growth, development and aging; phenotype; physiology; pollination; reproduction; self fertilization; Datura stramonium; Environment; Flowers; Phenotype; Pollination; Reproduction; Self-Fertilization
Año:2017
Volumen:120
Número:4
Página de inicio:603
Página de fin:615
DOI: http://dx.doi.org/10.1093/aob/mcx093
Título revista:Annals of Botany
Título revista abreviado:Ann. Bot.
ISSN:03057364
CODEN:ANBOA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03057364_v120_n4_p603_Camargo

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Citas:

---------- APA ----------
Camargo, I.D., Nattero, J., Careaga, S.A. & Núñez-Farfán, J. (2017) . Flower-level developmental plasticity to nutrient availability in Datura stramonium: Implications for the mating system. Annals of Botany, 120(4), 603-615.
http://dx.doi.org/10.1093/aob/mcx093
---------- CHICAGO ----------
Camargo, I.D., Nattero, J., Careaga, S.A., Núñez-Farfán, J. "Flower-level developmental plasticity to nutrient availability in Datura stramonium: Implications for the mating system" . Annals of Botany 120, no. 4 (2017) : 603-615.
http://dx.doi.org/10.1093/aob/mcx093
---------- MLA ----------
Camargo, I.D., Nattero, J., Careaga, S.A., Núñez-Farfán, J. "Flower-level developmental plasticity to nutrient availability in Datura stramonium: Implications for the mating system" . Annals of Botany, vol. 120, no. 4, 2017, pp. 603-615.
http://dx.doi.org/10.1093/aob/mcx093
---------- VANCOUVER ----------
Camargo, I.D., Nattero, J., Careaga, S.A., Núñez-Farfán, J. Flower-level developmental plasticity to nutrient availability in Datura stramonium: Implications for the mating system. Ann. Bot. 2017;120(4):603-615.
http://dx.doi.org/10.1093/aob/mcx093