Selected nutritional components and sensory attributes of cowpea (Vigna unguiculata [L.] Walp) leaves

• Published in: Plant foods for human nutrition (Dordrecht) Vol. 52; no. 3; pp. 221 - 229
• Main Authors: Ahenkora, K. (Crops Research Inst., Kumasi (Ghana).), Dapaah, H.K.A, Agyemang, A
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer 1998
• Subjects: Agronomy. Soil science and plant productions; ANALISIS ORGANOLEPTICO; ANALYSE ORGANOLEPTIQUE; Ascorbic Acid - analysis; Biological and medical sciences; CAUPI; COWPEAS; Fabaceae; FEUILLE; Food industries; Fruit and vegetable industries; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; GHANA; HOJAS; LEAVES; NIEBE; NUTRITIVE VALUE; ORGANOLEPTIC ANALYSIS; Phosphorus - analysis; Plant Leaves - chemistry; Plant Proteins - analysis; Plants, Medicinal; Taste; VALEUR NUTRITIVE; VALOR NUTRITIVO; VARIEDADES; Varietal selection. Specialized plant breeding, plant breeding aims; VARIETE; VARIETIES; VIGNA UNGUICULATA; Water; Yield, quality, earliness, varia; Ghana; Africa; Chemical analysis; Organoleptic properties; Nutritive value; Vigna unguiculata; Plant leaf; Grain legume; Leguminosae; Dicotyledones; Quality; Angiospermae; Spermatophyta; Chemical composition; Comparative study; Vegetable; Cultivar
• ISSN: 0921-9668; 1573-9104
• DOI: 10.1023/A:1008019113245

Reports on the nutritional composition of cowpea leaves have been limited to a small number of lines and the palatability characteristics of leaves apparently have not been studied. This study was therefore undertaken on cowpea leaves to determine the nutrient composition of fifteen varieties and the sensory attributes of ten varieties grown in Ghana. Nutritional components studied were moisture, protein, phosphorus and ascorbic acid. The sensory attributes included leaf size, taste and overall acceptability. There were significant (p > 0.05) differences among varieties in all nutrient components (fresh and dry weight basis), leaf size and overall acceptability. The nutrient composition values, on a dry weight basis, ranged from 9.4 to 13.0% for moisture, 303.8 to 468.9 mg/100 g for phosphorus, 33.5 to 148.0 mg/100 g for ascorbic acid, and 27.1 to 34.7% for protein. Differences in the sensory scores of leaves for taste were not significant (p > 0.05). Overall acceptability positively correlated with leaf size. Moisture content was negatively correlated with overall acceptability, phosphorus and ascorbic acid. Results can be exploited in a breeding program to develop nutritionally superior and acceptable cowpea varieties which can be used for harvesting of both leaves and seeds.