Effects of NaCl Stress on the Seed Germination and Physiological Characteristics of Tobacco

doi:10.11924/j.issn.1000-6850.2012-0577

Abstract

Abstract: The aim was to investigate the effect of salt stress on the seed germination and physiological characteristics of tobacco. The relative germination potential, relative germination rate, root length, chlorophy ll content, cell membrane permeability, MDA content and proline content were measured. With the increase of NaCl concentration, the relative germination potential, relative germination rate, root length, chlorophy ll content kept decreasing; Cell membrane permeability and proline content kept increasing; the malondiadehyde content increased at first, and then decreased with the increase of NaCl concentration. When the concentration of NaCl was up to 1.2% , the tobacco leaf chlorophy ll content declined to the maximum extent and the malondiadehyde content reached maximum value which provided a reliable basis for the study of tobacco salt tolerance mechanism.

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