Premium
Trade‐offs between flower number and investment to a flower in selfing and outcrossing varieties of Impatiens hypophylla (Balsaminaceae)
Author(s) -
Sato Hisashi,
Yahara Tetsukazu
Publication year - 1999
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.2307/2656668
Subject(s) - biology , impatiens , selfing , outcrossing , pollinator , balsaminaceae , botany , population , petal , pollination , cultivar , pollen , demography , sociology
Floral resource allocation was compared on a whole‐plant basis between two varieties of Impatiens hypophylla that differ in flower size. There were significant negative correlations between flower number and investments to a flower at both the within‐population and between‐variety levels. In individual flowers, var. hypophylla with larger flowers invested significantly more resources to male and pollinator‐attractive functions, whereas investments to female function did not differ between the varieties. In experimental populations placed in the field, pollinators preferred the larger flowers of var. hypophylla even within the same habitat of var. microhypophylla, which has smaller flowers. There was a significant lack of observed heterozygosity only in var. microhypophylla. Thus, the outcrossing variety had more attractive but fewer flowers, while the selfing variety had less attractive but more abundant flowers.