Mycorrhizal Status of Two Hawaiian Plant Species (Asteraceae) in a Tropical Alpine Habitat: The Threatened Haleakala Silversword (Argyroxiphium sandwicense subsp. macrocephalum) and the Endemic Dubautia menziesii

摘要

Samples of roots and root-zone soil from the threatened species Argyroxiphiumsandwicense subsp. macrocephalum and the endemic species Dubautiamenziesii, both members of the Asteraceae, were collected in a tropical alpinearea in Haleakala National Park, Maui, Hawai'i, and examined for arbuscularmycorrhizal fungi (AMF). All root samples exhibited the Paris-type of mycorrhizaewith arbuscules produced on hyphal coils, and all soil collections includedspores of AMF. Spores of Acaulospora, Entrophospora, Glomus, and Scutellosporaspp. were recovered from this site.