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| Castillo,María L.C; Bustamante,Ramiro O; Peña-Gómez,Francisco T; Gutiérrez,Víctor L; Reyes,Claudio A; Arredondo-Núñez,Alicia; Marey,Marilyn. |
| Negative photoblastism is defined as the inhibitory effect of light on seed germination. This effect can be modulated by abiotic variables, such as temperature, light condition and water potential. This conditions change notoriously at higher altitudes, could promote differentiations in the photoblastic response among populations. Also, this physiological attribute poses an interesting conflict for plant regeneration, because prevents seed germination on the soil surface, however, it can also to reduce the mortality of seeds germinants in unsuitable conditions and consequently, seedling mortality. Eschscholzia californica is one of the few species with negative photoblastism and it is invasive in Chile, growing primarily in open and disturbed places. Some... |
| Tipo: Journal article |
Palavras-chave: Central Chile; Common garden; California poppies; Seed burial; Seed germination. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432013000200010 |
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| Peña-Gómez,Francisco T; Bustamante,Ramiro O. |
| In this study, we compared demographic responses of Eschscholzia californica populations located at different altitude, under the basic assumption that altitudinal gradients impose environmental limitation to the spread at the upper edge of the gradient. We detected significant differences among populations either in terms of life history attributes and the finite rate of increase. In general, coastal population expressed higher finite population rates than mountain populations, although these differences were not statistically significant. Mountain populations (Corral Quemado and Farellones) expressed a finite population rate not significant different of 1. These result suggest that at the upper front of invasion the species is in a demographic... |
| Tipo: Journal article |
Palavras-chave: Populations; Invasions; Heterogeneity; Demographic matrix. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432012000100011 |
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