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Publication Type J
Authors Fall, F., D. Diouf, D. Fall, N. Bakhoum, B. Thioye, A. Kane, C. Ndiaye, I. Ndoye and A. M. Ba
Title Growth and physiological responses of Sporobolus robustus kunth seedlings to salt stress
Source Arid Land Research and Management
Author Keywords Biomass production chlorophyll grass Na accumulation osmotic adjustment proline salinity tolerance acacia-mangium accumulation halophytes symbiosis proline poaceae plants
Abstract Seedlings of S. robustus were exposed to increasing NaCl concentrations (0, 50, 100, 150, 200, 250, and 300mM) for 50, 100, and 150 days, in greenhouse conditions. Total dry weight and salt tolerance index decreased gradually with increasing NaCl concentrations. The optimum growth of S. robustus (4.12 to 5.25gplant(-1)) was obtained between 0 and 150mM at 150 days after salt stress. Foliar chlorophyll a and total chlorophyll contents increased with NaCl concentration at 50 days after treatment. There was no significant effect of salinity on chlorophyll a, b and total chlorophyll contents at 100 and 150 days after treatment. Higher Na contents were found in the shoots as compared to the roots. The Na content increased, while K decreased with increasing NaCl concentrations, suggesting competitive inhibition between absorptions of Na and K as a consequence, the K/Na ratios in shoots and roots decreased with increasing salinity. The proline contents in S. robustus were more pronounced at 300mM (2.02 mu mol/g), 250mM (2.64 mu mol/g), and 200mM NaCl concentrations (2.98 mu mol/g) for 50, 100, and 150 days, respectively, as compared to the treatment without added NaCl. Overall, S. robustus could be considered as salt tolerant on the basis of their performance in biomass production, accumulation of Na, similar foliar chlorophyll a, chlorophyll b and total chlorophyll contents, and accumulation of proline with increasing salinity. The potential ability of S. robustus to accumulate significant amounts of Na makes this halophyte promising as a desalinization tool of salted soils.
Author Address [Fall, Fatoumata; Diouf, Diegane; Bakhoum, Niokhor; Thioye, Babacar; Kane, Aboubacry; Ndoye, Ibrahima] Cheikh Anta Diop Univ UCAD, Dept Plant Biol, Dakar, Senegal. [Fall, Fatoumata; Diouf, Diegane; Fall, Dioumacor; Bakhoum, Niokhor; Thioye, Babacar; Kane, Aboubacry; Ndiaye, Cheikh; Ndoye, Ibrahima] Res Ctr Bel Air, Commun Lab Microbiol LCM IRD ISRA UCAD, Dakar, Senegal. [Fall, Fatoumata; Diouf, Diegane; Fall, Dioumacor; Bakhoum, Niokhor; Thioye, Babacar; Kane, Aboubacry; Ndiaye, Cheikh; Ndoye, Ibrahima] Joint Int Lab Adaptat Plants & Associated Microor, Dakar, Senegal. [Fall, Dioumacor] Senegalese Inst Agr Res ISRA, Natl Ctr Forestry Res CNRF, Daka, Senegal. [Ba, Amadou Mustapha] Univ Antilles, Lab Plant Biol & Physiol, Pointe A Pitre, Guadeloupe. [Ba, Amadou Mustapha] Trop & Mediterranean Symbioses Lab LSTM, Campus Int Baillarguet, Montpellier, France. fal1481@yahoo.fr
ISSN 1532-4982
ISBN 1532-4982
29-Character Source Abbreviation Arid Land Res. Manag.
Year Published 2017
Volume 31
Issue 1
Beginning Page 46-56
Digital Object Identifier (DOI) 10.1080/15324982.2016.1246491
Unique Article Identifier WOS:000392424500004

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