Author:
Burgos Nilda R.,Talbert Ronald E.,Mattice John D.
Abstract
Concentrations of DIBOA [2,4-dihydroxy-1,4-(2H)-benzoxazine-3-one] and BOA [2-(3H)-benzoxazolinone], described previously as major allelochemicals inSecale cereale(rye), were determined in eight field-grown cultivars, harvested at booting, using high-performance liquid chromatography (HPLC). Allelochemicals were also quantified in greenhouse-grown cultivar ‘Bates’ harvested 30, 45, 60, and 75 days after planting (DAP). The total production of DIBOA and BOA from field-grownS. cerealeranged from 137 to 1,469 μg g−1dry tissue among the eight cultivars. ‘Bonel’ cultivar had the highest hydroxamic acid (HA) content and ‘Pastar’ the lowest. Bonel also showed the highest activity onEleusine indica(goosegrass) and Pastar the least, in culture plate bioassays using aqueous extracts. HA content in shoot tissue varied withS. cerealematurity. The greatest level of HA in greenhouse-grown Bates was obtained 60 DAP compared to 30 DAP.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Cited by
72 articles.
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