Logo: to the web site of Uppsala University

uu.sePublications from Uppsala University
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Variation in sexual expression in Jacaratia mexicana (Caricaceae) in southern Mexico: Frequency and relative seed performance of fruit-producing males
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
Show others and affiliations
2007 (English)In: Biotropica, ISSN 0006-3606, E-ISSN 1744-7429, Vol. 39, no 1, p. 79-86Article in journal (Refereed) Published
Abstract [en]

Dioecy, the segregation of male and female structures among individuals, is widespread in tropical plants, encompassing 10-30 percent of species in some sites. In many cases, interindividual sex separation is not complete, as individual plants, although nominally dioecious, may produce both types of reproductive structures. A common form of this sexual variation is the production of female structures in otherwise male individuals, commonly referred to as fruiting males. Here we report the existence of fruiting males in the dioecious tropical tree Jacaratia mexicana (Caricaceae). We show that fruiting males can constitute up to 45 percent of all males in some populations of a tropical forest in Southern Mexico. In order to determine the functional significance of fruiting males for the breeding system of J. mexicana, we compared the relative performance of male- and female-borne seeds. Our results show that seeds from fruiting males are three times less likely to germinate and survive than seeds from female trees. Based on relative seed fitness data, and sex ratios in natural populations, we estimate that 6-15 percent of the genes contributed by fruiting males to the next generation are transmitted via ovules, meaning that morphological variation in gender is at least partially accompanied by functional gender variation. Finally, our seed fitness estimates for fruiting males suggest that fruiting males will not replace female plants in natural populations.

Place, publisher, year, edition, pages
2007. Vol. 39, no 1, p. 79-86
Keywords [en]
breeding systems, dioecy, fruiting males, functional gender, reproductive biology, tropical dry forest, WURMBEA-DIOICA COLCHICACEAE, SMITH WOODSON CARICACEAE, GYNODIOECIOUS, ANGIOSPERMS, EVOLUTIONARY PATHWAYS, FLOWERING PLANTS, TROPICAL FOREST, GENDER, SUBDIOECY, INTERFERENCE
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-482938OAI: oai:DiVA.org:uu-482938DiVA, id: diva2:1690748
Note

Times Cited: 0 Cited Reference Count: 39

Available from: 2022-08-27 Created: 2022-08-27 Last updated: 2022-08-27

Open Access in DiVA

No full text in DiVA

Search in DiVA

By author/editor
Vallejo-Marin, M.
By organisation
Plant Ecology and Evolution
In the same journal
Biotropica
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 31 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf