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Research Article

Academia Journal of Biotechnology 5(3): 038-043, March 2017
DOI: 10.15413/ajb.2017.0127
ISSN: 2315-7747
2017 Academia Publishing

Abstract


Effects of direct and gradual salinity exposure on carrot (Daucus carota L.) seeds and recovery response
 

Accepted 16th February, 2017

Safwan Shiyab1,2 and Philipp Simon1,3*

1Department of Horticulture, 1575 Linden Drive, University of Wisconsin Madison, Wisconsin, 53706-1590 USA.
2Environmental Plant Physiology Horticulture and Crop Science Department, Faculty of Agriculture, The University of Jordan, Amman 11942, Jordan.
3US Department of Agriculture (USDA)–Agricultural Research Service, Vegetable Crops Research Unit, 1575 Linden Drive, Madison, Wisconsin, 53706-1590 USA.


Salinity is a major cause of abiotic stress in arid and semi-arid climates that substantially reduces crop yield. This study evaluated the effects of salinity on germination and early seedling growth of two carrot cultivars in vitro under varying salinity levels. Salinity was induced by incorporating up to 150 mM of sodium chloride (NaCl) into the culture media. Seeds were either exposed directly to salinity, by planting on MS media containing salt, or gradually exposed by sequential transfer every four days to higher salt concentrations. Salinity caused significant reductions in germination parameters (germination percentage, speed, and energy) with elevated salinity level, but growth was less impaired by gradual exposure to salt. The gradual exposure of seedlings to salinity provides an opportunity to study the development of salt tolerance. The viability of seeds of glycophytes failing to germinate when exposed to salinity has not been previously reported. It was discovered that many carrot seeds that failed to germinate on saline media in this study recovered and grew when transferred to salt-free media.

Key words:
Salinity, abiotic stress, carrot, germination parameters, seed recovery
.
 

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cite this article as:
Shiyab S, Simon P
(2017). Effects of direct and gradual salinity exposure on carrot (Daucus carota L.) seeds and recovery response. Acad. J. Biotechnol. 5(3): 038-043.

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