Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards

Mountain papaya (Vasconcellea pubescens A.DC.) is described as trioecious in the centers of origin of Ecuador, Colombia, and Peru. However, under cultivation conditions in La Serena (30° S, 70° W), Chile, it is found to be dioecious and monoecious. The objective was to learn about the variations in...

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Autores principales: Salvatierra-González,María Angélica, Jana-Ayala,Constanza
Lenguaje:English
Publicado: Instituto de Investigaciones Agropecuarias, INIA 2016
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000200001
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spelling oai:scielo:S0718-583920160002000012018-10-01Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchardsSalvatierra-González,María AngélicaJana-Ayala,Constanza Ambisexual dioecious monoecious pollen Vasconcellea candamarcensis Vasconcellea cundinamarcensis or Carica pubescens Mountain papaya (Vasconcellea pubescens A.DC.) is described as trioecious in the centers of origin of Ecuador, Colombia, and Peru. However, under cultivation conditions in La Serena (30° S, 70° W), Chile, it is found to be dioecious and monoecious. The objective was to learn about the variations in floral expression of mountain papaya. Flowers from monoecious and dioecious plants were therefore identified and quantified during two seasons. In vitro pollen germination ability was also evaluated based on the factors of site, season, and plant sex. Monoecious plant inflorescences are polygamous; female and male flowers are observed, as well as bisexual flowers that are usually deformed. This condition allows them to be classified as an ambisexual plant. The existence of flowers of different sexes appears to depend on the season; the female dioecious plant is maintained as such, independently of climatic conditions. Pollen from male flowers, from both ambisexual and male plants, germinates 75% in summer, while germination decreases to 56% in spring (P ≤ 0.05). Flowering of female plants coincides with the permanent occurrence of male flowers in ambisexual plants, which ensures pollination without the need for male plants as pollinators in orchards. Based on this information, some management practices and possible lines of research about this species are proposed.info:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.76 n.2 20162016-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000200001en10.4067/S0718-58392016000200001
institution Scielo Chile
collection Scielo Chile
language English
topic Ambisexual
dioecious
monoecious
pollen
Vasconcellea candamarcensis
Vasconcellea cundinamarcensis or Carica pubescens
spellingShingle Ambisexual
dioecious
monoecious
pollen
Vasconcellea candamarcensis
Vasconcellea cundinamarcensis or Carica pubescens
Salvatierra-González,María Angélica
Jana-Ayala,Constanza
Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards
description Mountain papaya (Vasconcellea pubescens A.DC.) is described as trioecious in the centers of origin of Ecuador, Colombia, and Peru. However, under cultivation conditions in La Serena (30° S, 70° W), Chile, it is found to be dioecious and monoecious. The objective was to learn about the variations in floral expression of mountain papaya. Flowers from monoecious and dioecious plants were therefore identified and quantified during two seasons. In vitro pollen germination ability was also evaluated based on the factors of site, season, and plant sex. Monoecious plant inflorescences are polygamous; female and male flowers are observed, as well as bisexual flowers that are usually deformed. This condition allows them to be classified as an ambisexual plant. The existence of flowers of different sexes appears to depend on the season; the female dioecious plant is maintained as such, independently of climatic conditions. Pollen from male flowers, from both ambisexual and male plants, germinates 75% in summer, while germination decreases to 56% in spring (P ≤ 0.05). Flowering of female plants coincides with the permanent occurrence of male flowers in ambisexual plants, which ensures pollination without the need for male plants as pollinators in orchards. Based on this information, some management practices and possible lines of research about this species are proposed.
author Salvatierra-González,María Angélica
Jana-Ayala,Constanza
author_facet Salvatierra-González,María Angélica
Jana-Ayala,Constanza
author_sort Salvatierra-González,María Angélica
title Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards
title_short Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards
title_full Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards
title_fullStr Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards
title_full_unstemmed Floral expression and pollen germination ability in productive mountain papaya (Vasconcellea pubescens A.DC.) orchards
title_sort floral expression and pollen germination ability in productive mountain papaya (vasconcellea pubescens a.dc.) orchards
publisher Instituto de Investigaciones Agropecuarias, INIA
publishDate 2016
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392016000200001
work_keys_str_mv AT salvatierragonzalezmariaangelica floralexpressionandpollengerminationabilityinproductivemountainpapayavasconcelleapubescensadcorchards
AT janaayalaconstanza floralexpressionandpollengerminationabilityinproductivemountainpapayavasconcelleapubescensadcorchards
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