Studies on the constituents of seeds of Pachyrrhizus erosus and their anti herpes simplex virus (HSV) activities. (1/7)

Studies on the chemical constituents of the seeds of Pachyrrhizus erosus (Leguminosae) resulted in the isolation of nine known components: five rotenoids [dolineone (3), pachyrrhizone (5), 12a-hydroxydolineone (7), 12a-hydroxypachyrrhizone (9), and 12a-hydroxyrotenone (2)], two isoflavonoids [neotenone (4) and dehydroneotenone (8)], one phenylfuranocoumarin [pachyrrhizine (6)], and a monosaccharide (dulcitol). The full 1H- and 13C-NMR assignments for the isolated products except a sugar, including revision of previous assignments in the literature, are reported. Moderate anti herpes simplex virus (HSV) activity was observed in 12a-hydroxydolineone (7) and 12a-hydroxypachyrrhizone (9) among the isolated products.  (+info)

Symbiotic root nodule bacteria isolated from yam bean (Pachyrhizus erosus). (2/7)

A total of 25 isolates from root nodules of yam bean (Pachyrhizus erosus L. Urban), a tuber-producing leguminous plant, were characterized. All isolates formed effective nodules mainly on lateral roots while edible tubers were developed on the taproot. The root nodules formed were identified as the typical determinate type. By an analysis of the partial sequences of the 16S rRNA gene (approximately 300 bp) of 10 strains which were selected randomly, the isolated root nodule bacteria of yam bean were classified into two different genera, Rhizobium and Bradyrhizobium. Two strains, YB2 (Bradyrhizobium group) and YB4 (Rhizobium group) were selected and used for further analyses. The generation time of each strain was shown to be 22.5 h for strain YB2 and 0.8 h for strain YB4, respectively. Differences between strains YB2 and YB4 were also reflected in the bacteroid state in the symbiosome. Symbiosome in nodule cells for the strain YB4 contained one bacteroid cell in a peribacteroid membrane, whereas a symbiosome for strain YB2 contained several bacteroid cells.  (+info)

Y4lO of Rhizobium sp. strain NGR234 is a symbiotic determinant required for symbiosome differentiation. (3/7)

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Bradyrhizobium pachyrhizi sp. nov. and Bradyrhizobium jicamae sp. nov., isolated from effective nodules of Pachyrhizus erosus. (4/7)

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Physico-chemical characteristics and functional properties of chitin and chitosan produced by Mucor circinelloides using yam bean as substrate. (5/7)

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The origin and functional transition of P34. (6/7)

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Postharvest conservation of the tuberous roots of Pachyrhizus Ahipa (Wedd) Parodi. (7/7)

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