Elicitor-induced accumulation of glyceollin and callose in soybean roots and localized resistance against Phytophthora megasperma f.sp. glycinea |
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| Affiliation: | 1. Università degli Studi di Torino, Dipartimento di Scienze Agrarie, Forestali e Alimentari, Largo Paolo Braccini 2, 10095 Grugliasco, TO, Italy;2. University of Padova, Dipartimento di Agronomia, Animali, Alimenti, Risorse naturali e Ambiente, Agripolis - Viale dell''Università 16, Legnaro, PD, Italy |
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| Abstract: | Immersion of roots of 2-day-old soybean seedlings (Glycine max cv. Harosoy 63) into solutions of several glucan elicitors caused the accumulation to various degrees of the soybean phytoalexin glyceollin. Laminarin and polytran proved to be more effective elicitors in this system than the glucan elicitor from Phytophthora megasperma f.sp. glycinea (Pmg). Digitonin and tomatin caused, in addition to glyceollin accumulation, the deposition of callose in the rhizodermis. Pretreatment of the soybean roots with laminarin effected an increase in resistance of the seedlings against a compatible race of Pmg. |
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