International Journal of Multidisciplinary Research and Development

International Journal of Multidisciplinary Research and Development


International Journal of Multidisciplinary Research and Development
International Journal of Multidisciplinary Research and Development
Vol. 2, Issue 11 (2015)

Leaf water content and biochemical parameters as affected by salinity and their impacts on yield of selected okra (Abelmoschus esculentus L.) cultivars


Jeyapraba J, Mahendran S, Sujirtha N

Salinization of underground water resource is a major problem that contributes in fixing the agricultural productivity. Most plants are salt sensitive with either a relatively low salt tolerant or severely inhibited growth at low salinity levels so differ in the growth response to salinity. Okra plant is more sensitive to salinity as it affects water relations and nutrient uptake of plants. Almost all parts of okra plant are consumed, like fresh okra pods are used as vegetable, roots and stems are used for making fibre and ropes. By considering this feature, an experiment was conducted at the Agronomy farm of the Eastern University, Sri Lanka in the ‘Yala’ 2014 to investigate the salinity stress responses of selected okra cultivars on certain Physiological and Biochemical attributes. The okra cultivars ‘MI 5’, ‘Haritha’ and ‘EUOK 2’ were used for this study. The experiment was laid out in the Completely Randomized Design with 2 × 3 factor factorial arrangement having six treatments and four replications. The okra cultivars were grown in polyethylene bags filled with sandy regosols as the growth medium. These plants were subjected to salt stress after 30 days of germination with 100 mM NaCl concentration. The control plants were irrigated with distilled water. Salt stress significantly reduced the Relative Water Content (RWC) of leaves of the selected okra cultivars. The highest RWC (73.5%) was obtained in the ‘EUOK 2’ while the lowest one (58.7%) was found in the ‘MI 5’. Salt stress also significantly reduced the Total Soluble Solids (TSS) of okra pods. The highest TSS (5.8% brix) were obtained in the ‘EUOK 2’ and the lowest ones (3.1% brix) were found in the ‘MI 5’. Salt stress significantly reduced the Ascorbic Acid contents of okra pods. The highest Ascorbic Acid content (10 mg 100g-1) was obtained in the ‘MI 5’ and the lowest value (3.3 mg 100g-1) was found in the ‘EUOK 2’. Salt stress significantly reduced the fresh pod yield of okra cultivars. The highest pod yield (7.4 t ha-1) was obtained in the ‘EUOK 2’ and the lowest one (4.3 t ha-1) was found in the ‘MI 5’. From the above results it was inferred that okra cultivar ‘EUOK 2’ had the ability to resist salinity stress better than the other two cultivars. Hence, ‘EUOK 2’ was identified as the most salt tolerant okra cultivar among the tested ones.
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How to cite this article:
Jeyapraba J, Mahendran S, Sujirtha N. Leaf water content and biochemical parameters as affected by salinity and their impacts on yield of selected okra (Abelmoschus esculentus L.) cultivars. International Journal of Multidisciplinary Research and Development, Volume 2, Issue 11, 2015, Pages 397-401
International Journal of Multidisciplinary Research and Development International Journal of Multidisciplinary Research and Development