INVESTIGADORES
URCELAY Roberto Carlos
artículos
Título:
Relationship between corolla length and floral larceny in
Autor/es:
CARLOS URCELAY1*, CAROLINA L. MORALES2 & VANINA R. CHALCOFF2
Revista:
ANNALES BOTANICI FENNICI
Referencias:
Lugar: Helsinski; Año: 2006 p. 1 - 7
ISSN:
0003-3847
Resumen:
Flowers with pink or red tubular corollas have been traditionally viewed as adapted for
pollination by birds. However, tubular .owers frequently suffer illegitimate visits by
nectar robbers. Campsidium valdivianum (Bignoniaceae) is an endemic hummingbirdpollinated
climber with pinkish-red tubular .owers, which suffers high levels of .oral
larceny by a native bumblebee. We studied two populations of C. valdivianum in an
Andean forest in South America and found that they differ signi.cantly in their mean
corolla length but not in their mean corolla width. The proportion of robbed .owers, as
well as the mean number of holes per robbed .ower was higher in the population with
higher mean corolla length. Although robbing levels also differed between individuals
within populations, corolla length was only signi.cantly related to robbing frequency
in the population with longest corollas. The positive relationship between corolla
length and nectar robbing observed here might affect the .tness in this species and thus
the direction and magnitude of selection of the .oral trait.Campsidium valdivianum (Bignoniaceae) is an endemic hummingbirdpollinated
climber with pinkish-red tubular .owers, which suffers high levels of .oral
larceny by a native bumblebee. We studied two populations of C. valdivianum in an
Andean forest in South America and found that they differ signi.cantly in their mean
corolla length but not in their mean corolla width. The proportion of robbed .owers, as
well as the mean number of holes per robbed .ower was higher in the population with
higher mean corolla length. Although robbing levels also differed between individuals
within populations, corolla length was only signi.cantly related to robbing frequency
in the population with longest corollas. The positive relationship between corolla
length and nectar robbing observed here might affect the .tness in this species and thus
the direction and magnitude of selection of the .oral trait.C. valdivianum in an
Andean forest in South America and found that they differ signi.cantly in their mean
corolla length but not in their mean corolla width. The proportion of robbed .owers, as
well as the mean number of holes per robbed .ower was higher in the population with
higher mean corolla length. Although robbing levels also differed between individuals
within populations, corolla length was only signi.cantly related to robbing frequency
in the population with longest corollas. The positive relationship between corolla
length and nectar robbing observed here might affect the .tness in this species and thus
the direction and magnitude of selection of the .oral trait.