International Journal of Agroforestry and Silviculture ISSN 2375-1096 Vol. 8 (8), pp. 001-008, August, 2020. © International Scholars Journals

Full Length Research Paper

Effects of NaCl on Na+, Cl- and K+ ions accumulation in two sugarcane (Saccharum sp.) cultivars differing in their salt tolerance

Christophe Bernard Gandonou1,2,*, Fidèle Bada2, Simplice Léopold Gnancadja2, Jamal Abrini1 and Nadia Skali-Senhaji1

1Laboratoire de Biologie et Santé, Université Abdelmalek Essaâdi, Faculté des Sciences de Tétouan, B.P. 2121 Tétouan, Maroc.

2Laboratoire de Physiologie Végétale, Faculté des Sciences et Techniques (FAST/UAC), 01BP 526 Cotonou, République du Bénin.

Accepted 20 May, 2020

Abstract

The effects of salt on growth and ions accumulation were investigated in two sugarcane (Saccharum sp.) cultivars, CP66-346 (salt-tolerant) and CP65-357 (salt-sensitive). Young plants of these cultivars were exposed to four NaCl concentrations (0, 17, 34 and 68 mM). Na+, Cl- and K+ ions concentrations were quantified after 2 weeks of stress. NaCl effect resulted in plant growth reduction in both cultivars but cv. CP66-346 plants were less affected compared to CP65-357 indicating that CP66-346 was more salt-tolerant than CP65-357. Na+ and Cl- concentrations increased significantly in leaves and roots under salinity while K+ concentration significantly decreased in both cultivars. The highest accumulation of Na+ and Cl- occurred in young leaves of the salt tolerant cv. CP66-346 coupled with the lowest reduction in K+ concentration. These results suggest that the salt tolerance of cv. CP66-346 is closely related to a high accumulation of Na+ and Cl-. . K+ ions also may play a key role in sugarcane salt tolerance.

Key words: Ions concentrations, sugarcane, Saccharum sp., salt-tolerance.