Interaction of root-knot nematode [Meloidogyne javanica] and tomato as affected by hydrogen peroxide

• Autorzy: Karajeh M R

Warianty tytułu

PL

Wspoldzialanie matwika korzeniowego Meloidogyne javanica i roslin pomidora wywolane nadtlenkiem wodoru

• Języki publikacji: EN

Abstrakty

EN

The effect of hydrogen peroxide (H2O2) on root-knot nematode (RKN, Meloidogyne javanica) in tomato was investigated. Soil drenching with exogenous H2O2 was done using seven H2O2 concentrations (1, 10, 100, 250, 500, 750 and 1000 mM) at different application times (24 hours before the time of plant inoculation with the RKN (T1), at the time of inoculation (T2), and 24 hours after the inoculation time (T3). The nematode reproduction rate (eggs/g fresh root) was significantly reduced in all H2O2 treatments compared with the untreated control. The lowest reduction in nematode reproduction occurred at 10 mM H2O2. The application times T1 and T2 were significantly higher in reducing the reproduction rate than T3 at 250, 750 and 1000 mM H2O2. The content of endogenous H2O2 in the treated plants was significantly higher than in the non-treated plants. Some phytotoxicity was apparent at the higher concentrations of H2O2 (≥ 500 mM) in the treated plants due to the accumulation of the endogenous H2O2. The treatments with 1 and 10 mM H2O2 did not differ from the untreated control in plant chlorophyll content while the content was significantly reduced at the higher concentrations. Exogenous application of H2O2 may have a direct effect on the nematode reproduction and an indirect effect on the treated tomato plants that can be elicited by H2O2 to resist the nematode infection.

PL

Badano wpływ nadtlenku wodoru (H2O2) na porażenie korzeni pomidora mątwikiem Meloidogyne javanica. W tym celu nasączono ziemię roztworami nadtlenku wodoru o zróżnicowanym stężeniu (1, 10, 100, 250, 500, 750 i 1 000 mM H2O2) w trzech terminach: T1 - 24 h przed inokulacją patogenem; T2 - w czasie inokulacji; T3 - 24 h po inokulacji. We wszystkich traktowanych kombinacjach uzyskano istotne zmniejszenie reprodukcji mątwika (jaja/g świeżej masy korzeni) w porównaniu do nietraktowanej kombinacji kontrolnej. Najniższy stopień zmniejszenia reprodukcji nicienia stwierdzono przy użyciu stężenia 10 mM H2O2. Przy stosowaniu stężeń 250, 750 i 1 000 mM H2O2 w terminach T1 i T2 wystąpiło istotnie wyższe ograniczenie tempa reprodukcji szkodnika, niż w terminie T3. Zawartość endogennego H2O2 w traktowanych roślinach była istotnie niższa niż w roślinach nietraktowanych. W przypadku wyższych stężeń (≥ 500 mM H2O2) stwierdzono na traktowanych roślinach fitotoksyczność, co było wynikiem nagromadzenia endogennego H2O2. W kombinacjach za stężeniami 1 i 10 mM H2O2 rośliny nie różniły się pod względem zawartości chlorofilu od roślin w kombinacji kontrolnej, podczas gdy przy użyciu stężeń wyższych zawartość chlorofilu była istotnie niższa. Stwierdzono, że zewnętrzne zastosowanie H2O2 może wywierać bezpośrednie działanie na reprodukcję M. javanica, oraz pośrednie działanie na rośliny pomidora, które stają się mniej wrażliwe na zakażenie tym patogenem.

Słowa kluczowe

PL

plant protection

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2008
• Tom: 48
• Numer: 2
• Opis fizyczny: p.181-187,fig.,ref.

Twórcy

autor

Karajeh M R

• Mutah University, Karak P.O.Box 7 (zip code 61710), Jordan

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