Publications

histopathology of root-knot nematode (meloidogyne incognita) infection on white yam (dioscorea rotundata) tubers.	white yam tissues naturally and artificially infected with root-knot nematodes were fixed, sectioned, and examined with a microscope. infective second-stage juveniles of meloidogyne incognita penetrated and moved intercellularly within the tuber. feeding sites were always in the ground tissue layer where the vascular tissues are distributed in the tubers. giant cells were always associated with xylem tissue. they were thin walled with dense cytoplasm and multinucleated. the nuclei of the giant c ...	1988	19290181
production of oxalic acid by some fungi infected tubers.	oxalic acid (as oxalate) was detected in four tubers commonly used for food in nigeria-dioscorea rotundata (white yam), solanum tuberosum (irish potato), ipomoea batatas (sweet potato), and manihot esculenta (cassava). whereas healthy i. batata had the highest oxalic acid content, healthy m. esculenta contained the lowest. when all tubers were artifically inoculated with four fungi-penicillium oxalicum curie and thom, aspergillus niger van tiegh, a. flavus and a. tamarii kita, there was an incre ...	1983	6670294
variation, heritability and genetic advance of eight characters in white yam.	phenotypic and genotypic coefficients of variation, heritability, and genetic advance were estimated for: time to vine emergence, leaf size, leaf virus infection, plant leafiness, shoot height, vine dry weight, number of tubers per hill and tuber yield per hill in white yam (dioscorea rotundata poir.) using plants recently derived from seedlings (sp) as well as those that have been clonally propagated for 3-5 years (cp). estimates for these parameters were much lower in sp than in cp plants. mea ...	1983	24263630
purification of porcine pancreatic amylase by affinity chromatography with amylase inhibitor of dioscorea alata immobilized on deae-cellulose.		1982	6179853
anthocyanins in dioscorea alata l.		1968	5674975