Screening of arbuscular mycorrhiza-dependent eeltlvars of Welsh onion (Allium fistulosum L.)

摘要

Changes in P uptake and growth of plants with arbuscular mycorrhizal (AM) colonization differ among plant species and cultivars. The purpose of the present study was to screen for cultivars of Welsh onion (Allium fistulosum L.) that showed higher dependency of P uptake and shoot growth on AM fungi. Twenty cultivars of A. fistulosum were grown in pots with or without (control) AM fungus Glomus R-10. AM colonization, root length, shoot dry weight and shoot P concentration were determined 95 day after so whig. All cultivars were well colonized with Glomus R-10. Shoot P uptake and shoot dry weight increased with increasing AM colonization. Mycorrhizal dependency was different among cultivars. Several cultivars showed high AM dependency. It is suggestedthat selection of the high AM-dependent cultivars is important to improve plant growth with AM fungi.