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Cyanogenesis in Indiangrass Seedlings 1
Author(s) -
Haskins F. A.,
Gorz H. J.,
Vogel K. P.
Publication year - 1979
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1979.0011183x001900060003x
Subject(s) - biology , seedling , botany , shoot , pteridium aquilinum , cultivar , horticulture , fern
In a study of seedlings of 72 entries representing 39 species, 14 genera, and 2 tribes of grasses, only entries of the genus Sorghastrum were found to contain the cyanogenic glucoside, dhurrin [ (S)‐p ‐hydroxymandelonitrile β‐D ‐glucopyranoside], Dhurrin was found in seedlings of each of the 10 entries of indiangrass [ Sorghastrum nutans (L.) Nash] and the three entries of S. pellitum . Seedlings of five indiangrass cultivars were assayed for dhurrin concentration. Levels expressed as HCN potential (HCN‐p) ranged from about 900 ppm for ‘Holt’ to about 1,200 ppm for ‘Llano’ and ‘Oto’. Further studies with Oto seedlings indicated that first leaves were higher and more uniform in HCN‐p than were other portions of the shoot, but all shoot portions contained dhurrin. Seedling roots also contained dhurrin, but the HCN‐p of roots was appreciably lower than that of shoots. Spectral evidence indicated that dhurrin was present in extracts of leaves of tillers harvested from field‐grown plants. Dhurrin was not detected in all such tillers, however. Indiangrass tiller extracts contained more interfering substances than seedling extracts, in agreement with previous observations on Sorghum seedlings.