Science Links Japan | Effect of Citrus Juice Pomace Extracts on in vitro Hyphal Growth of Vesicular-Arbuscular Mycorrhizal Fungi and their in vivo Infections of Citrus Roots.

Effect of Citrus Juice Pomace Extracts on in vitro Hyphal Growth of Vesicular-Arbuscular Mycorrhizal Fungi and their in vivo Infections of Citrus Roots.

Accession number;00A0234044

Title;Effect of Citrus Juice Pomace Extracts on in vitro Hyphal Growth of Vesicular-Arbuscular Mycorrhizal Fungi and their in vivo Infections of Citrus Roots.

Author; ISHII T (Ehime Univ., Ehime, Jpn) AIKAWA J (Ehime Univ., Ehime, Jpn) NAKAMURA N (Ehime Federation Of Agricultural Cooperative Assoc., Ehime, Jpn) SANO K (Ehime Federation Of Agricultural Cooperative Assoc., Ehime, Jpn) MATSUMOTO I (Ehime Univ., Ehime, Jpn) KADOYA K (Ehime Univ., Ehime, Jpn)

Journal Title;Journal of the Japanese Society for Horticultural Science

Journal Code:F0626A

ISSN:0013-7626

VOL.69;NO.1;PAGE.9-14(2000)

Figure&Table&Reference;FIG.4, TBL.2, REF.17

Pub. Country;Japan

Language;English

Abstract;The effects of citrus juice pomace extracts on in vitro hyphal growth of vesicular-arbuscular mycorrhizal(VAM) fungi and the mycorrhizal formation on trifoliate orange(Poncirus trifoliata Raf.) seedlings and Citrus iyo Tanaka trees was investigated. One hundred .MU.1[equivalent to 6.5g dry weight(DW) of satsuma mandarin(Citrus unshiu Marc.) and 4.3gDW of Citurs hassaku Tanake] of the 25% MeOH eluates of citrus juice pomace extracts significantly increased in vitro hyphal growth of Gigaspora ramisporophora Spain, but a 100% MeOH eluates inhibited it. In a plot where the solution consisting of 25% MeOH eluates of satsuma mandarin juice pomace extracts(equivalent to 10gDW) and liquid fertilizers was applied to the soil inoculated with the spores of Gigaspora ramisporophora, the percentage of VAM infection in trifoliate orange roots was six times higher than that in the control(water only) after one week. When the above mixed solution was administered to a Citrus iyo orchard via a sprinkler irrigation system, VAM development was markedly stimulated as compared to the untreated plots(liquid fertilizer only) and the control(solid fertilizer only). These results show that 25% MeOH eluates of citrus juice pomace extracts contain stimulatory substances for VAM fungi. Furthermore, the application of the 25% MeOH eluates to the soil is very effective in stimulating VAM development. (author abst.)

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