Mycotrophic strategy of 13 common neotropical trees and shrubs

Lebron L., . and Myster R. W., . and Loayza A. B. P., . and Zimmerman J. K., . Mycotrophic strategy of 13 common neotropical trees and shrubs. pp. 34-41. ISSN 0128-1283

We conducted a greenhouse experiment using common Puerto Rican trees and shrubs that span the spectrum of neotropic life histories. Our working hypothesis was that species had a higher colonisation rate of arbuscular mycorrhizal fungi (AMF) as they established further and further after a disturbance (quantified as increasing seed size). Results suggested that (1) Cecropia schreberiana and Schefflera morototoni were weakly-facultative mycorrhizal (2) Casearia arborea Inga laurina and Guarea guidonia were strongly-facultative mycorrhizal and (3) Piper glabrescens Tabebuia heterophylla Palicourea riparia Buchenaria capitata and Dacryodes excelsa were obligately mycorrhizal with (4) Psychotria berteriana Prestoea montana and Manilkara bidentata also obligate but at a reduced level. In general these species were adapted to low inorganic phosphorus colonised well with AMF and agreed with our working hypothesis; however three shrub species (Piper Palicourea Psychotria) did not. Finally we also found that shade tolerance of the test species corresponded with the AMF results better than their wood density or drought tolerance.

Full text available from: Official URL: http://www.frim.gov.my/v1/JTFSOnline/jtfs/v25n1/34...

Abstract

We conducted a greenhouse experiment using common Puerto Rican trees and shrubs that span the spectrum of neotropic life histories. Our working hypothesis was that species had a higher colonisation rate of arbuscular mycorrhizal fungi (AMF) as they established further and further after a disturbance (quantified as increasing seed size). Results suggested that (1) Cecropia schreberiana and Schefflera morototoni were weakly-facultative mycorrhizal (2) Casearia arborea Inga laurina and Guarea guidonia were strongly-facultative mycorrhizal and (3) Piper glabrescens Tabebuia heterophylla Palicourea riparia Buchenaria capitata and Dacryodes excelsa were obligately mycorrhizal with (4) Psychotria berteriana Prestoea montana and Manilkara bidentata also obligate but at a reduced level. In general these species were adapted to low inorganic phosphorus colonised well with AMF and agreed with our working hypothesis; however three shrub species (Piper Palicourea Psychotria) did not. Finally we also found that shade tolerance of the test species corresponded with the AMF results better than their wood density or drought tolerance.

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Item Type:	Article
AGROVOC Term:	Neotropical region
AGROVOC Term:	Shrubs
AGROVOC Term:	Trees
AGROVOC Term:	Mycorrhizal infection
AGROVOC Term:	Fungi
AGROVOC Term:	Cecropia
AGROVOC Term:	Schefflera
AGROVOC Term:	Phosphorus
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:26
URI:	http://webagris.upm.edu.my/id/eprint/21222

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