Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Journal NLM ID: 0370452WWW link: http://ci.nii.ac.jp/naid/110006324975Publisher: Tokyo: Agricultural Chemical Society Of Japan
Institutions: Department of Food and Nutrition, Faculty of Science of Living, Osaka City University, Osaka, Japan
A highly methyl esterified linear α-(1→4)-linked polygalacturonide, isolated from a water extract of seeds of Ficus awkeotsang Makino, was used for the study of elicitor-active oligo-saccharides on host-parasite interactions in higher plants. Oligogalacturonides (OLGAs), obtained from awkeotsang polygalacturonide or low methyl esterified apple pectin by treatment with the purified endo-pectate lyase (EC 4.2.2.2) of Erwinia carotovora, were found to induce glyceollin accumulation in soybean cotyledons. The de-esterified awkeotsang-OLGAs was precisely fractionated by anion-exchange chromatography using a QAE-Sephadex A-25 column, and was assayed for the elicitor activity. Among the purified Oligogalacturonides with DP 3 to 12, it was found that 4,5-unsaturated hexa-α-1,4-galacturonide of the low molecular elicitor-active Oligogalacturonides (DP 5 to 7) also was a potent elicitor as well as the 4,5-unsaturated deca-α-1,4-galacturonide of the high molecular elicitor-active Oligogalacturonides (DP 9 to 11) previously reported by Davis et al.
Structure type: homopolymer ; n=3-12
Compound class: galacturonan
Methods: gel filtration, FAB-MS, HPLC, enzymatic digestion, elicitor assay
Comments, role: possible structure
NCBI Taxonomy refs (TaxIDs): 204231Reference(s) to other database(s): GTC:G86267DW, CCSD:
18067, CBank-STR:5594
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There is only one chemically distinct structure:
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(later renamed to: Ficus pumila var. awkeotsang)