INVESTIGADORES
ZUNINO Maria Paula
artículos
Título:
Nectar characteristics and pollinators for three native, co-occurring insectpollinated Passiflora (Passifloraceae) from central Argentina
Autor/es:
CAROLINA TORRES; JOSÉ S. DAMBOLENA; MARÍA P. ZUNINO ; LEONARDO GALETTO
Revista:
The International Journal of Plant Reproductive Biology
Editorial:
THE SOCIETY OF PLANT REPRODUCTIVE BIOLOGISTS
Referencias:
Año: 2012 p. 121 - 126
ISSN:
0975-4296
Resumen:
Floral biology, nectar traits and pollinators were studied in different species of Passiflora, co-occurring in their
southern area of distribution. Volume, concentration, and sugar amount of nectar per flower were measured in the
native, insect-pollinated Passiflora caerulea, P. foetida and P. suberosa (Passifloraceae). Qualitative and
quantitative nectar sugar composition were determined and compared between species. Pollinators were
recorded and related to both floral and nectar traits. Flowers of the three species display the usual floral sexualphases
described for the genus. In general, nectar traits were variable between species but relatively constant
within each one. Nectar sugars were glucose, fructose and sucrose in relatively constant proportions among
samples of the same species, but each species showed a particular sugar composition (P. foetida, P. caerulea andPassiflora, co-occurring in their
southern area of distribution. Volume, concentration, and sugar amount of nectar per flower were measured in the
native, insect-pollinated Passiflora caerulea, P. foetida and P. suberosa (Passifloraceae). Qualitative and
quantitative nectar sugar composition were determined and compared between species. Pollinators were
recorded and related to both floral and nectar traits. Flowers of the three species display the usual floral sexualphases
described for the genus. In general, nectar traits were variable between species but relatively constant
within each one. Nectar sugars were glucose, fructose and sucrose in relatively constant proportions among
samples of the same species, but each species showed a particular sugar composition (P. foetida, P. caerulea andPassiflora caerulea, P. foetida and P. suberosa (Passifloraceae). Qualitative and
quantitative nectar sugar composition were determined and compared between species. Pollinators were
recorded and related to both floral and nectar traits. Flowers of the three species display the usual floral sexualphases
described for the genus. In general, nectar traits were variable between species but relatively constant
within each one. Nectar sugars were glucose, fructose and sucrose in relatively constant proportions among
samples of the same species, but each species showed a particular sugar composition (P. foetida, P. caerulea andP. foetida, P. caerulea and
P. suberosa with lower, intermediate and higher proportion of sucrose, respectively). Bombus spp. and Xylocopa
splendidula were recorded as the main pollinators for P. caerulea; Bombus opifex, Melissoptila sp., and Thygaterwith lower, intermediate and higher proportion of sucrose, respectively). Bombus spp. and Xylocopa
splendidula were recorded as the main pollinators for P. caerulea; Bombus opifex, Melissoptila sp., and Thygaterwere recorded as the main pollinators for P. caerulea; Bombus opifex, Melissoptila sp., and Thygater
sp. for P. foetida, and different species of wasps for P. suberosa. Bees seem to prefer larger amounts of nectar with
hexose predominance, while wasps less amount of almost pure sucrose nectar. These species of Passiflora need
pollinators to assure high fruit and seed sets. On the other hand, plants of these species mature many birddispersed
fruits every season indicating that plant-pollinator interactions are healthy although the actual high
rates of deforestation in the region.P. foetida, and different species of wasps for P. suberosa. Bees seem to prefer larger amounts of nectar with
hexose predominance, while wasps less amount of almost pure sucrose nectar. These species of Passiflora need
pollinators to assure high fruit and seed sets. On the other hand, plants of these species mature many birddispersed
fruits every season indicating that plant-pollinator interactions are healthy although the actual high
rates of deforestation in the region.Passiflora need
pollinators to assure high fruit and seed sets. On the other hand, plants of these species mature many birddispersed
fruits every season indicating that plant-pollinator interactions are healthy although the actual high
rates of deforestation in the region.