Abstract
The effects of arbuscular mycorrhizae (AM) fungi on growth and survival of two pioneer tropical plant species were studied in a greenhouse experiment for 6 months. One, an early pioneer species (Heliocarpus appendiculatus Turcz., Tiliaceae) and the second, a late pioneer species (Stemmadenia donnell-smithii (Rose) Woodson, Apocynaceae). Three growing conditions were used as competition factors—no competition, with intraspecific and interspecific competitions—along with two different conditions of AM—with and without mycorrhizal inoculum. Mycorrhizal colonization of H. appendiculatus roots was seven-fold more than in S. donnell-smithii. With AM infection, H. appendiculatus did not increase in growth, but showed greater survival in the absence of competition. S. donnell-smithii grew better in the presence of AM fungi and the effect of competition was diminished. S. donnell-smithii with AM fungi infection showed better survival and increase in biomass, making it a better competitor than H. appendiculatus.
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Guadarrama, P., Álvarez-Sánchez, J. & Briones, O. Seedling growth of two pioneer tropical tree species in Competition: The role of arbuscular mycorrhizae. Euphytica 138, 113–121 (2004). https://doi.org/10.1023/B:EUPH.0000046797.42632.6b
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DOI: https://doi.org/10.1023/B:EUPH.0000046797.42632.6b