Soybean Root Response to Symbiotic Infection Glyceollin I Accumulation in an Ineffective Type of Soybean Nodules with an Early Loss of the Peribacteroid Membrane
نویسندگان
چکیده
A glyceollin I accumulation o f about 6000 pmol • mg dry weight, a tenfold increase above control root tissue, was found in one type o f nodule from Glycine max which had been infected with a fix~ strain (61-A-24) o f Rhizobium japonicum. In nodules infected with one other ineffective (ßx~) strain o f Rhizobium japonicum (RH 31-Marburg) or with two f i x + strains o f Rhizobium japonicum (61 -A -101 and USDA 110) no increase in glyceollin I concentrations above control values was found at either 20 d or 34 d after infection. Nodules infected with Rhizobium japonicum 61-A-24 are distinguished by an early loss o f the peribacteroid membrane in the infected host cell, whilst the bacteroids themselves remain stable.
منابع مشابه
Soybean nodulin-26 gene encoding a channel protein is expressed only in the infected cells of nodules and is regulated differently in roots of homologous and heterologous plants.
Nodulin-26 (N-26) is a major peribacteroid membrane protein in soybean root nodules. The gene encoding this protein is a member of an ancient gene family conserved from bacteria to humans. N-26 is specifically expressed in root nodules, while its homolog, soybean putative channel protein, is expressed in vegetative parts of the plant, with its highest level in the root elongation zone. Analysis...
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