International Journal of Horticulture and Floriculture

International Journal of Horticulture and Floriculture ISSN 2167-0455 Vol. 7 (8), pp. 001-004, August, 2019. © International Scholars Journals

Full Length Research Paper

Relation between catalase activity, salt stress and urban environments in Citrus aurantium L.

Khelifa, S.1, M’Hamdi, M.2, Rejeb, H.3, Belbahri, L.4* and Souayeh, N.5

1Sylvopastoral Institute of Tabarka, B.P 345 - 8110 Tabarka, Tunisia.

2Department of Agronomic and Economic Sciences, Higher School of Agriculture of Kef, 7119, Kef Tunisia.

3Department of Biological Sciences and Plant Protection, Higher Institute of Agronomy of Chott Mariem, 4042, Sousse, Tunisia.

4Agronomy Department, HEPIA, School of Engineering of Lullier, 150 Route de Presinge, 1254 Jussy, Switzerland.

5University of Gabes, Cité Erriadh 6072, Zrig, Gabes, Tunisia.

Accepted 16 May, 2019

Abstract

In order to evaluate the degree of adaptation of urban Citrus aurantium L. trees to osmotic stress and to explore the effect of seed’s origin on stress tolerance/adaptation, catalase activity levels were measured. Before carrying out the analysis, seedlings issued from high and low plant mother’s vitality were grown on NaCl stressed media during 2 months. Catalase activities revealed different levels according to cities, plant mother vitality and salt dose. It increased in stressed medium for the same seedlings origin. Thus, tissues superoxide dismutase (SOD) activity seems to be initiated on plant mother trees and seedlings behaviour is correlated with seed formation environment.

Key words: Seedlings, origin, urban trees, salt stress, catalase.