INVESTIGADORES
AIZEN marcelo Adrian
artículos
Título:
Self pollination shortens flower lifespan in Portulaca umbraticola
Autor/es:
AIZEN, M.A
Revista:
INTERNATIONAL JOURNAL OF PLANT SCIENCES
Editorial:
UNIV CHICAGO PRESS
Referencias:
Lugar: Chicago; Año: 1993 vol. 154 p. 412 - 415
ISSN:
1058-5893
Resumen:
I compared median lifespan of exogenously unpollinated, hand self-, and hand cross-pollinated flowersof partially autogamous Portulaca umbraticola. Self-pollination consistently shortened flower lifespan incomparison with either cross-pollination or absence of hand-pollination. Median flower lifespan of cross-pollinatedflowers did not differ from the median lifespan of unpollinated flowers. Seed set was greatlyincreased following hand-pollination but did not show significant differences between self- and crosspollinationtreatments. Nevertheless, early self-pollination in natural populations of this species couldlead to pollen limitation, a decrease in opportunities for outcrossing, and/or a decrease in pollen exportby causmg premature flower senescence of already short-lived flowers.