Response of Alnus and casuarina to endomycorrhizal inoculation
DOI:
https://doi.org/10.33885/sf.1996.3.850Keywords:
actinorrhizal plants, Frankia, endomycorrhiza, endomycorrhizal fungiAbstract
Casuarinas (Casuarina equíseüfolia L.) and alders (Alnus acuminata F.) are trees situated among the most imponant
actinorrhizal plañís in México because of their potential and present utilization. Both trees are associated in nature
with a nitrogen-fixer actinomycete called Frankia. In addition to thís association, they form mycorrhizae. With the
aim to evalúate and compare the response of the two different actinorrhizal type of plants to the inoculation with
different vesicular-arbuscular fungí, a green house assay was carried out. The response of the piants in terms of the
evaluated growth variables (volume, ftesh and dry weight) was different. Casuarina showed significan! mercases in
all the variables of growth when inoculated with Glomus intraradices', the increases obtained with other fungí were
not significant. Inoculation to alders showed no sígnificant increases on growth, except in volume; this increase was
done with 3 of the 4 tested fungi. Extent of mycorrhization was aíso very different in both type of piants; casuarina
showed valúes from 22% to 67% whereas the alders showed valúes from 32 to 57%. A relationship between extent of
fringa! colonizaron of the root and a growth increase was not observed.
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