บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Role of phenolics in resistance of maize grain to the stored grain insects Prostephanus truncatus (Horn) and Sitophilus zeamais (Motsch).

Arnason, J. T.; Gale, J.; Conilh de Beyssac, B.; Sen, A.; Miller, S. S.; Philogene, J. R.; Lambert, D. H.; Fulcher, R. G.; Serratos, A.; Mihm, J.;

Journal of Stored Products Research Year: 1992 Vol: 28 Issue: 2 Pages: 119-126 Ref: 21 ref.

1992

บทคัดย่อ

Role of phenolics in resistance of maize grain to the stored grain insects Prostephanus truncatus (Horn) and Sitophilus zeamais (Motsch).

Phenolics in maize grain were assessed as a possible factor or indicator of resistance to 2 stored product insect pests. Weight loss of grain of 7 maize genotypes due to the bostrichid Prostephanus truncatus was found to be strongly and negatively correlated to the phenolic content of maize grain determined by high pressure liquid chromatography (HPLC) (r = -0.93, P(r> -0.93) = 0.01). Similarly, using 25 Mexican landraces, grain weight loss due to the curculionid Sitophilus zeamais was determined to be negatively correlated to total phenolics in the grain (r = -0.84, P(r > -0.84) =0.01) as measured by a new and rapid quantitative imaging technique. The technique employed microspectrofluorimetry to quantify intense fluorescence due to phenolics in milled grain samples or to locate fluorescence in cross sections of whole grains. In whole grains, fluorescence was most intense in the aleurone layer, pericarp and embryo but less intense in the endosperm. These localizations were confirmed by HPLC of extracts of the various tissues.