Effect of Salinity on Germination, Seedling Growth and Acid Phosphatase Activity in Lettuce - American Journal of Plant Sciences

AJPS > Vol.6 No.1, January 2015

American Journal of Plant Sciences

Volume 6, Issue 1 (January 2015)

ISSN Print: 2158-2742 ISSN Online: 2158-2750

Google-based Impact Factor: 1.20 Citations h5-index & Ranking

Effect of Salinity on Germination, Seedling Growth and Acid Phosphatase Activity in Lettuce ()

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DOI: 10.4236/ajps.2015.61007 9,842 Downloads 13,985 Views Citations

Author(s)

Nawel Nasri^*, Issam Saïdi, Rym Kaddour, Mokhtar Lachaâl

Affiliation(s)

Physiologie et Biochimie de la Tolérance au Sel des Plantes, Faculté des Sciences de Tunis, Campus Universitaire, Tunis, Tunisia.

ABSTRACT

The impact of salt stress (NaCl 100 mM) on two lettuce varieties Romaine and Vista was conducted at germination and early seedling stages. The seeds of lettuce varieties were provided by the Seed Laboratory of Tunisian Ministry of Agriculture. The seeds were germinated in Petri dishes with double filter paper in distilled water (control) or NaCl solution (100 mM) for 5 days. The result showed that salinity significantly affected percentage and rate of germination in Vista variety but 100% of germination was found in Romaine. Length and fresh weight of root and shoot were reduced significantly with salt treatment in two lettuce varieties. Regarding biochemical analysis, acid phosphatase activity in root increased in Romaine and decreased in Vista. In shoot, this activity showed no difference with the control in the two varieties. However in cotyledons, and during 24 hours after germination, salinity decreased acid phosphatase activity in both varieties whereas in the later hours (48 - 96 h) this activity reached the value of the control in Romaine and Vista.

KEYWORDS

Acid Phosphatase, Germination, Lettuce, Salinity, Seedling

Share and Cite:

Nasri, N. , Saïdi, I. , Kaddour, R. and Lachaâl, M. (2015) Effect of Salinity on Germination, Seedling Growth and Acid Phosphatase Activity in Lettuce. American Journal of Plant Sciences, 6, 57-63. doi: 10.4236/ajps.2015.61007.

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