Availability of floral resources in yellow passion fruit cultivars

  • Simone Santos Oliveira Cobra Universidade do Estado de Mato Grosso
  • Celice Alexandre Silva Universidade do Estado de Mato Grosso
  • Willian Krause Universidade do Estado de Mato Grosso
  • Laís Lage Universidade do Estado de Mato Grosso
Keywords: Nectar, stigma receptivity, pollen viability

Abstract

The reproductive strategies and resources available in the flower are characteristics that stimulate research studies on the genetic improvement and fruit yield of commercial cultivars. In this sense, this study aimed to study the floral biology aspects of passion fruit cultivars in Tangará da Serra region, Mato Grosso State, Brazil at different evaluation times. The experiment was carried out with eight cultivars of yellow passion fruit from an ex situ germplasm bank of the State University of Mato Grosso. The floral resources (pollen and nectar) were evaluated in a completely randomized, factorial arrangement (8 cultivars x 5 evaluation times), with five replications. Throughout anthesis, the pollen viability, stigma receptivity, and sugar volume and concentration in the nectar were evaluated. The evaluations were carried out in 1-h intervals, between 1:30 and 5:30 p.m. The highest nectar volume production was at 2:30 p.m., decreasing gradually thereafter at the later evaluation times, for all cultivars. Pollen viability increased from the first to the second evaluation time and then decreased gradually until the last evaluation. Stigma receptivity was higher than 90% in all cultivars, at all evaluation times. BRS Rubi do Cerrado and FB 200 were the most promising cultivars for nectar volume and concentration, pollen viability, and stigma receptivity characteristics.

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Author Biographies

Simone Santos Oliveira Cobra, Universidade do Estado de Mato Grosso
Programa de Pos Graduação em Genética e Melhoramento de Plantas
Celice Alexandre Silva, Universidade do Estado de Mato Grosso

Departamento de Ciencias Biologicas

Centro de Pesquisas Estudos e Desenvolvimento Agro-Ambiental

Laboratório de Botânica

Willian Krause, Universidade do Estado de Mato Grosso
Departamento de Agronomia UNEMAT
Laís Lage, Universidade do Estado de Mato Grosso
Programa de Pos Graduação em Genética e Melhoramento de Plantas
Published
12-04-2018
How to Cite
Oliveira Cobra, S. S., Silva, C. A., Krause, W., & Lage, L. (2018). Availability of floral resources in yellow passion fruit cultivars. Comunicata Scientiae, 8(4), 555-561. https://doi.org/10.14295/cs.v8i4.2071
Section
Original Article