Agricultural Science

Agricultural Science

ISSN: 2291-4471 (Print)    ISSN: 2291-448X (Online)

Volume 2 (2014), No. 3, Pages 23-35

DOI: 10.12735/as.v2i3p23

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Evaluation of NaCl Tolerance in the Physical Reduction of Jatropha Curcus L. Seedlings

Hiroshi Matsumoto1  Rumana Yeasmin2  Frank Kalemelawa1  Taiji Watanabe3  Makoto Aranami4  Eiji Nishihara3 

1The United Graduate School of Agricultural Sciences, Tottori University 4-101 Koyama-Minami, Tottori 680-8553, Japan
2University of Technology Sydney, Broadway, PO Box 123, NSW 2007, Australia
3Faculty of Agriculture, Tottori University, 4-101 Koyama-Minami, Tottori 680-8550, Japan
4Sekisui Chemical Tanzania LTD., 196 Regent Estate, Dar es Salaam, Tanzania

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Jatropha curcas L. is an important bio-fuel crop however, it’s tolerance to salinity especially with reference to changes in physical characteristics has been hardly studied. This work aimed to evaluate Jatropha. curcas L. tolerance to salinity stress using physical growth patterns, leaf shedding and mineral nutrient deposition. Jatropha curcas L. seedlings were grown under four different levels of NaCl concentration: 0 (control), 25, 50 and 100 mM under greenhouse conditions. Harvesting was done when average transpiration of each treatment was less than 50% and 75% as compared to the control.

    Results showed a significant variation in transpiration rate among the salinity treatments and control. A gradual reduction in the biomass yield of seedlings with increasing concentration of NaCl was observed. Reference to the result of IC50, the seedlings were tolerant to NaCl irrigation up to 54 mM. Additionally, seedling stems and roots accumulated large amounts of Na and K; a large amount of K particularly accumulated in the stem part, and was likely responsible for the low Na/K ratio observed in the stem. Defoliation however occurred with even irrigation of as low NaCl concentration as 25 mM. Thus, we report that Jatropha curcas L. is highly sensitive to Na accumulation, especially in the root-zone.

Keywords: Jatropha curcas L., salt tolerance, growth, defoliation, nutrient concentration

To Cite this Article: Matsumoto, H., Yeasmin, R., Kalemelawa, F., Watanabe, T., Aranami, M., & Nishihara, E. (2014). Evaluation of NaCl tolerance in the physical reduction of Jatropha curcus L. seedlings. Agricultural Science, 2(3), 23-35.

Copyright © Hiroshi Matsumoto et al.

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This article is published under license to Science and Education Centre of North America. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License.

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Evaluation of NaCl Tolerance in the Physical Reduction of Jatropha Curcus L. Seedlings