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Do Hybrid Trees Inherit Invasive Characteristics? Fruits of Corymbia torelliana X C. citriodora Hybrids and Potential for Seed Dispersal by Bees.

Wallace HM, Leonhardt SD - PLoS ONE (2015)

Bottom Line: Corymbia torelliana is an invasive tree with an unusual animal dispersal mechanism: seed dispersal by stingless bees, that hybridizes readily with other species.Some hybrid fruits displayed the characteristic hollowness, resin production and resin chemistry associated with seed dispersal by bees.We conclude that C. torelliana and C. citriodora subsp. citriodora hybrids can inherit some fruit characters that are associated with dispersal by bees, but we did not find a hybrid with the complete set of characters that would enable bee dispersal.

View Article: PubMed Central - PubMed

Affiliation: Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC 4558, Australia.

ABSTRACT
Tree invasions have substantial impacts on biodiversity and ecosystem functioning, and trees that are dispersed by animals are more likely to become invasive. In addition, hybridisation between plants is well documented as a source of new weeds, as hybrids gain new characteristics that allow them to become invasive. Corymbia torelliana is an invasive tree with an unusual animal dispersal mechanism: seed dispersal by stingless bees, that hybridizes readily with other species. We examined hybrids between C. torelliana and C. citriodora subsp. citriodora to determine whether hybrids have inherited the seed dispersal characteristics of C. torelliana that allow bee dispersal. Some hybrid fruits displayed the characteristic hollowness, resin production and resin chemistry associated with seed dispersal by bees. However, we did not observe bees foraging on any hybrid fruits until they had been damaged. We conclude that C. torelliana and C. citriodora subsp. citriodora hybrids can inherit some fruit characters that are associated with dispersal by bees, but we did not find a hybrid with the complete set of characters that would enable bee dispersal. However, around 20,000 hybrids have been planted in Australia, and ongoing monitoring is necessary to identify any hybrids that may become invasive.

No MeSH data available.


Related in: MedlinePlus

Fruit dimensions of Corymbia torelliana, C. citriodora subsp. citriodora and hybrids: A) Length, B) Width, C) External Rim, D) Internal Rim.Means and standard errors are presented, means with different letters are significantly different (Tukey’s HSD, P<0.05)
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pone.0138868.g002: Fruit dimensions of Corymbia torelliana, C. citriodora subsp. citriodora and hybrids: A) Length, B) Width, C) External Rim, D) Internal Rim.Means and standard errors are presented, means with different letters are significantly different (Tukey’s HSD, P<0.05)

Mentions: There were significant differences between the three taxa in all fruit dimensions sampled. Both C. torelliana and C. citriodora subsp. citriodora were significantly shorter than hybrids (F = 165.23, P<0.0001, Fig 2A). C. torelliana was significantly wider than C. citriodora subsp. citriodora with hybrids showing intermediate width (F = 383.64, P<0.0001, Fig 2B). Hybrids had a significantly larger external rim than both species (F = 81.59, P<0.0001, Fig 2C). The internal rim was widest for C. torelliana, smallest for C. citriodora subsp. citriodora and hybrids were intermediate (F = 272.46, P<0.0001, Fig 2D). Within the three taxa there were significant differences between individual trees for height, width, external rim and internal rim (F = 27.27, F = 32.16, F = 24.44, F = 21.49 respectively, P<0.0001 in all cases).


Do Hybrid Trees Inherit Invasive Characteristics? Fruits of Corymbia torelliana X C. citriodora Hybrids and Potential for Seed Dispersal by Bees.

Wallace HM, Leonhardt SD - PLoS ONE (2015)

Fruit dimensions of Corymbia torelliana, C. citriodora subsp. citriodora and hybrids: A) Length, B) Width, C) External Rim, D) Internal Rim.Means and standard errors are presented, means with different letters are significantly different (Tukey’s HSD, P<0.05)
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4587733&req=5

pone.0138868.g002: Fruit dimensions of Corymbia torelliana, C. citriodora subsp. citriodora and hybrids: A) Length, B) Width, C) External Rim, D) Internal Rim.Means and standard errors are presented, means with different letters are significantly different (Tukey’s HSD, P<0.05)
Mentions: There were significant differences between the three taxa in all fruit dimensions sampled. Both C. torelliana and C. citriodora subsp. citriodora were significantly shorter than hybrids (F = 165.23, P<0.0001, Fig 2A). C. torelliana was significantly wider than C. citriodora subsp. citriodora with hybrids showing intermediate width (F = 383.64, P<0.0001, Fig 2B). Hybrids had a significantly larger external rim than both species (F = 81.59, P<0.0001, Fig 2C). The internal rim was widest for C. torelliana, smallest for C. citriodora subsp. citriodora and hybrids were intermediate (F = 272.46, P<0.0001, Fig 2D). Within the three taxa there were significant differences between individual trees for height, width, external rim and internal rim (F = 27.27, F = 32.16, F = 24.44, F = 21.49 respectively, P<0.0001 in all cases).

Bottom Line: Corymbia torelliana is an invasive tree with an unusual animal dispersal mechanism: seed dispersal by stingless bees, that hybridizes readily with other species.Some hybrid fruits displayed the characteristic hollowness, resin production and resin chemistry associated with seed dispersal by bees.We conclude that C. torelliana and C. citriodora subsp. citriodora hybrids can inherit some fruit characters that are associated with dispersal by bees, but we did not find a hybrid with the complete set of characters that would enable bee dispersal.

View Article: PubMed Central - PubMed

Affiliation: Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC 4558, Australia.

ABSTRACT
Tree invasions have substantial impacts on biodiversity and ecosystem functioning, and trees that are dispersed by animals are more likely to become invasive. In addition, hybridisation between plants is well documented as a source of new weeds, as hybrids gain new characteristics that allow them to become invasive. Corymbia torelliana is an invasive tree with an unusual animal dispersal mechanism: seed dispersal by stingless bees, that hybridizes readily with other species. We examined hybrids between C. torelliana and C. citriodora subsp. citriodora to determine whether hybrids have inherited the seed dispersal characteristics of C. torelliana that allow bee dispersal. Some hybrid fruits displayed the characteristic hollowness, resin production and resin chemistry associated with seed dispersal by bees. However, we did not observe bees foraging on any hybrid fruits until they had been damaged. We conclude that C. torelliana and C. citriodora subsp. citriodora hybrids can inherit some fruit characters that are associated with dispersal by bees, but we did not find a hybrid with the complete set of characters that would enable bee dispersal. However, around 20,000 hybrids have been planted in Australia, and ongoing monitoring is necessary to identify any hybrids that may become invasive.

No MeSH data available.


Related in: MedlinePlus