Growth Morphology and Chlorophyll Synthesis of Vigna unguiculata (L). Walp Varieties (White and Brown) Grown Under Salinity Stress

Authors

  • Okon J. E.  Department of Biological Science, Akwa Ibom State University, P. M. B. 1067, Ikot Akpaden, Akwa Ibom State-Nigeria
  • 2Okon O. G.  Department of Botany and Ecological Studies, University of Uyo, P. M. B. 1017, Uyo. Akwa Ibom StateNigeria
  • Akpan E. E. Udofia E. E.  Department of Botany and Ecological Studies, University of Uyo, P. M. B. 1017, Uyo. Akwa Ibom StateNigeria

Keywords:

Chlorophyll, Cowpea, Magnesium Sulphate, Vigna unguiculata and Salinity Stress

Abstract

The impact of salt (MgSO4) on some growth parameters and chlorophyll synthesis of Cowpea (Vigna unguiculata) (L). Walp varieties was studied in the greenhouse. Mature dry seeds of Vigna unguiculata was planted in sandy loam soil after sterilization. Three (3) groups of experiment were used for each variety: group 1 (control), group 2 (1% MgSO4) and group 3 (0.1% MgSO4). The set-up was done in complete randomized block design (CRBD) in triplicates. The morphological parameters studied were: seedling height, leaf area, internode length, number of nodes, root length, moisture content, petiole length and chlorophyll content. The results revealed that salt (MgSO4) stress had significant (p=0.05) reduction effects on growth morphology of Vigna unguiculata. It was observed from the results of this research that the relationship between chlorophyll “a” and “b” at the same concentration of MgSO4 followed a different sequence for the two bean varieties (white and brown). The result represented showed a decrease in chlorophyll “a” and “b” and carotenoids in both varieties. The results of this research also indicates that V. unguiculata, which widely used in Nigeria and Africa as a whole suffers morphological and physiological alterations that make them unable to develop and thrive effectively, thus reducing productivity of this very important crop. Thus, this crops should not be planted on saline soils as this will adversely affect its growth and productivity.

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International Journal of Scientific Research in Science and Technology

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Published

2017-04-30

Issue

Volume 3, Issue 3, March-April-2017

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Research Articles

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[1]
Okon J. E., 2Okon O. G., Akpan E. E. Udofia E. E., " Growth Morphology and Chlorophyll Synthesis of Vigna unguiculata (L). Walp Varieties (White and Brown) Grown Under Salinity Stress, International Journal of Scientific Research in Science and Technology(IJSRST), Online ISSN : 2395-602X, Print ISSN : 2395-6011, Volume 3, Issue 3, pp.339-346, March-April-2017.