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Annual Research & Review in Biology, ISSN: 2347-565X,Vol.: 22, Issue.: 3


Improving Salt Stress Tolerance of Pineapple cv. Queen Using Cobalt In vitro


Hala, E. Emam1, Enas, A. M. Ali1, A. M. F. Al-Ansary2, Nadia Gad3, M. Abdel-Hameed2 and Aida A. Rizkalla2*

1Department of Horticultural Crops Technology, National Research Centre, Dokki, Giza, Egypt.

2Department of Genetics and Cytology, National Research Centre, Dokki, Giza, Egypt.

3Department of Plant Nutrition, National Research Centre, Dokki, Giza, Egypt.

Article Information


(1) Jin-Zhi Zhang, Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, China.

(2) George Perry, Dean and Professor of Biology, University of Texas at San Antonio, USA.


(1) Martín Maria Silva Rossi, Estudio Agronómico, Santa Fé, Argentina.

(2) Decanato de Investigación, Universidad Nacional Experimental del Táchira, Táchira, Venezuela.

Complete Peer review History: http://www.sciencedomain.org/review-history/22711


This investigation aimed to focus on how cobalt can avoid the damage caused by salinity stress (NaCl) on Pineapple cv. Queen in vitro. Multiplicated pineapple explants (10 – 12 mm) were subjected for eight weeks to different NaCl conc. (0, 65, 135 or 200 mM) half of them were treated firstly with 5 mg/L Cobalt sulphate. Vegetative growth parameters (no.of shoots, no. of leaves, and shoot length/explant), mineral composition (N, P, K, Na, Cl, Fe, Mn, Zn, Cu and cobalt), proline and protein content were determined. Molecular characterization using PCR based RAPD was carried out to describe the genetic differences resulted from the studied treatments, (salinity and salinity combined with cobalt sulfate). Results show that, pineapple explants growth under salt stress wasn’t prohibited completely specially below 135 mM of NaCl, but it affected negatively with the highest salt stress 200 mM of NaCl. Explants treated with cobalt before subjected to salinity scored the highest significant percentage of vegetative growth characteristics compared with those untreated. Explants treated firstly with cobalt resulted in a significantly decrease of Na+ and Cl-. Cobalt has a positive effect on Macro and Micronutrients, proline and protein content. A total of 34 DNA fragments varying from 186-1456 (bp) were amplified, of which 16 were polymorphic and seven observed as a unique markers that revealed 64.03% polymorphism.

Keywords :

Pineapple; salt stress; cobalt; macro and micronutrients content; RAPD analysis; in vitro.

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DOI : 10.9734/ARRB/2018/38621

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