Salinity and Sodicity Induced Responses on Total Phenols, Flavonoids and Tannins Accumulation on Cowpea (Vigna unguiculata (L) Walp)
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Date
2023-09
Authors
Mutuku, T
Mamati, E
Mutune, A.
Journal Title
Journal ISSN
Volume Title
Publisher
AJHS
Abstract
Food shortage remains a developmental hindrance in globally with about 25% of world’s
population suffering from continued food and nutritional insecurity especially in ASALs.
Reduced arable tracts of land for cultivation, increased population and variation in nonliving factors such as water and salinity are challenges facing the world. Cowpea is
commonly grown on ASALs which are greatly affected by salinity. The study involved 4
cowpea varieties; K80, M66, Kunde 1 and KVU 27-1 that were subjected to both CaCl2(aq)
and NaCl(aq) at levels of 0 (control), four, eight and twelve dS/m. A complete
randomizeddesign in replicates of three in a greenhouse was usedat Jomo Kenyatta
University of Science and Technology, JujaSubcounty, Kiambu County on October 2021-
January 2022.The salts concentrations (NaCl and CaCl2) were applied to the soil from time
of sowing and constant levels were monitored throughout by use of an EC probe
Determination of total phenols, tannins, and flavonoids content was done using a UV-VIS
spectrophotometer. The obtained data wereevaluated using 2-way ANOVAat 5%
significance level using SPSS (software version 21). As salinity and sodicitylevels increased,
the phenols, tannins and flavonoids content also increased. Variety M66 recorded the
highest total phenols, tannins and flavonoids above 8 dS/m hence it developed a defense
mechanism against salt stress. Therefore, variety M66 was better adapted to high salt levels
because it performed better at high saline and sodic levels. Therefore, farmers especially in
marginal areas affected by salinity should adopt growing of M66 cowpea variety.
Description
Article
Keywords
Cowpea, Phenolics, Salinity, Sodicity, UV-VIS spectrophotometer
Citation
Mutuku, T., Mamati, E., & Mutune, A. (2023). Salinity and Sodicity Induced Responses on Total Phenols, Flavonoids and Tannins Accumulation on Cowpea (Vigna unguiculata (L) Walp). African Journal of Horticultural Science, 22, 73-80.