VISITANTES FLORAIS E OS EFEITOS DOS COMPONENTES DE FECUNDIDADE NO TREMOÇO-BRANCO (Lupinus albus L.) (LEGUMINOSAE, PAPILIONOIDEAE), NO CCA-UFSCAR/ARARAS-SP
VISITANTES FLORAIS E OS EFEITOS DOS COMPONENTES DE FECUNDIDADE NO TREMOÇO-BRANCO (Lupinus albus L.) (LEGUMINOSAE, PAPILIONOIDEAE), NO CCA-UFSCAR/ARARAS-SP
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DOI: 10.22533/at.ed.1432303112
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Palavras-chave: embriões, tremoço-branco, frutificação, inflorescências
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Keywords: embryos, white lupine, fruiting, inflorescences
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Abstract: Studies were conducted on fruit and seed development patterns, as well as the foraging behavior of floral visitors in Lupinus albus L. (Leguminosae), as the available literature is more extensive for species within Papilionoideae. Analyses were carried out to compare the position of the inflorescence, from which fully developed fruits were obtained, in addition to the abortion rate and seed viability. The study was conducted in a cultivation at the Federal University of São Carlos, Campus de Araras/SP, Brazil (22°18'27.4''S 47°22'45.5''W), between August and November 2013. The number of developed fruits (n=154) was lower than the number of developed flowers (n=898). There was a 17% fruiting percentage among the 32 L. albus individuals analyzed. The percentage of viable seeds (number of viable seeds / total number of seeds) was 97% (n=702). The percentage of aborted seeds (number of aborted seeds / total number of seeds) was 3% (n=21). The times between 4:00 pm and 5:00 pm and 5:00 pm and 6:00 pm resulted in the periods with the highest number of floral visitors and occurred over the course of three weeks. Bees were the sole floral visitors observed in the field. They landed on the flowers and, with their body mass, pushed the floral keel down, exposing the reproductive structures. After this process, pollen grains from the anthers were released and adhered to the bristles of the median and hind legs. Therefore, they were effective in pollen transfer. We believe that further studies focusing on genetics, embryology, demographic rates, and plant communities with interaction networks at various life stages would be important for evaluating maternal resource limitation, pollinator behavior, pollen dynamics, and gene expression of recessive lethals in L. albus.
- Nícolas Alberto Polizelli Ricci
- Priscila Orlandini
- Kayna Agostini