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Effects of salinity and nitric oxide donor sodium nitroprusside (SNP) on development and salt secretion of salt glands of Limonium bicolor

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Abstract

NO, as a signaling molecule, is involved in abiotic stresses. Limonium bicolor seedlings were treated with 200 mM NaCl combined with 0.05 mM SNP for 20 days to study the effects of NO on development and salt-secretion rates of salt glands. It was shown that the total number of salt glands on adaxial surfaces under condition of 200 mM NaCl containing 0.05 mM SNP treatment increased significantly compared with that under 200 mM NaCl treatment. Na+ secretion rate per leaf under 200 mM NaCl containing 0.05 mM SNP was significantly higher than that under 200 mM NaCl without SNP. However, there was no significant difference in salt-secretion rate of individual salt glands between 200 mM NaCl containing 0.05 mM SNP treatment and 200 mM NaCl treatment. Although there was no significant difference in salt-secretion rate of individual glands, Na+ concentration in the leaves treated with 200 mM NaCl solution containing SNP was significantly lower than that treated with 200 mM NaCl solution. Treatment with 200 mM NaCl solution containing SNP caused a remarkable increase in Na+ concentration in salt glands. Obviously, the efficiency of the secretion process per gland was enhanced by adding SNP to NaCl. The results showed NO may enhance the salt secretion by inducing more dermatogen cells to develop into salt glands and by enhancing the efficiency of the secretion process per gland.

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Authors and Affiliations

  1. College of Food and Bioengineering, Shandong Polytechnic University, Jinan, 250353, Shandong, People’s Republic of China

    Feng Ding

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  1. Feng Ding
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Correspondence to Feng Ding.

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Communicated by S. Weidner.

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Ding, F. Effects of salinity and nitric oxide donor sodium nitroprusside (SNP) on development and salt secretion of salt glands of Limonium bicolor . Acta Physiol Plant 35, 741–747 (2013). https://doi.org/10.1007/s11738-012-1114-8

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  • DOI: https://doi.org/10.1007/s11738-012-1114-8

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