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Fertility of Vriesea gigantea Gaud. (Bromeliaceae) in southern Brazil

Paggi, Gecele M ; Palma-Silva, Clarisse ; Silveira, Lucas C.T ; Kaltchuk-Santos, Eliane ; Bodanese-Zanettini, Maria H ; Bered, Fernanda

American journal of botany, 2007-04, Vol.94 (4), p.683-689 [Periódico revisado por pares]

United States: Botanical Society of America

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  • Título:
    Fertility of Vriesea gigantea Gaud. (Bromeliaceae) in southern Brazil
  • Autor: Paggi, Gecele M ; Palma-Silva, Clarisse ; Silveira, Lucas C.T ; Kaltchuk-Santos, Eliane ; Bodanese-Zanettini, Maria H ; Bered, Fernanda
  • Assuntos: Bromeliaceae ; flower production ; Flowers ; Fruit set ; Fruits ; Inflorescences ; Itapuã ; Plant fertility ; Plants ; Pollen ; pollen limitation ; Pollinators ; Reproductive Biology ; seed viability ; Seeds ; self‐compatibility ; State Park ; Viability ; Vriesea
  • É parte de: American journal of botany, 2007-04, Vol.94 (4), p.683-689
  • Notas: http://www.amjbot.org/
    The authors thank the staff of Itapuã State Park for helping to collect samples; L. E. C. Schmit, J. Soares, R. Webber, C. E. M. Gomes, J. A. T. Sampaio, and S. N. C. Richter for collecting plant material and/or providing locality information; C. Lexer for valuable comments and English revision; N. Rufino de Albuquerque, J. César de Lima and B. Silva for English revision and suggestions. Research was supported by CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) and PROPESQ/UFRGS (Pró‐Reitoria de Pesquisa/Universidade Federal do Rio Grande do Sul).
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  • Descrição: Plant fertility is a central subject of many questions in plant evolutionary and conservation biology. Pollen availability, abiotic resources, and flowering pattern can limit fruit and seed production. Open pollination and pollen supplementation studies are used to estimate any pollen limitation in natural populations. To study the impact of these factors on the reproductive success of Vriesea gigantea, an epiphytic bromeliad in the Atlantic Rainforest in Brazil, its fertility in four natural populations in Itapuã State Park was assessed by considering plant and inflorescence size, flower production, fruit and seed set, flower and fruit set pattern, and seed viability and germination rate. Supplemental pollination in adult plants was used to determine whether fruit production in V. gigantea is limited by reception of pollen. The results showed that V. gigantea has a high production of flowers, fruits, and seeds. Seeds are highly viable in all populations, presenting an average germination rate of 94% (SE ± 3.5). Plants of V. gigantea from Itapuã State Park are highly fertile. The high proportion of fruit and seed set after manual hand pollination indicates that the species is self-compatible. Pollination treatments showed evidence of pollinator limitation in the Itapuã State Park population.
  • Editor: United States: Botanical Society of America
  • Idioma: Inglês
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