Species height and root symbiosis, two factors influencing antiherbivore defense of woody plants in East African savanna
Thomas Palo, R.; Gowda, J.; Högberg, P.
Oecologia 93(3): 322-326
ISSN/ISBN: 1432-1939 PMID: 28313430 DOI: 10.1007/bf00317873
In East African savanna we found that leaves of mature tree species with symbiotic N2 fixation contained lower concentrations of polyphenols than leaves of species without this symbiosis. We suggest that the root symbiosis is costly to the plant in terms of photosynthate that otherwise could be used in chemical defense. Further, a negative relationship between concentration of polyphenols and the height of the species was found, independent of their ability to fix N2. These findings suggest that root symbioses and apparency to herbivory are important factors mediating the production of chemical defenses in plants.