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Salicylic acid-mediated changes in photosynthesis, nutrients content and antioxidant metabolism in two mustard (Brassica juncea L.) cultivars differing in salt tolerance

Authors :
Nafees A. Khan
Rahat Nazar
Asim Masood
Naser A. Anjum
Shabina Syeed
Noushina Iqbal
Source :
Acta Physiologiae Plantarum. 33:877-886
Publication Year :
2010
Publisher :
Springer Science and Business Media LLC, 2010.

Abstract

Mustard (Brassica juncea L.) cultivars Alankar (salt-tolerant) and PBM16 (salt-sensitive) plants were grown with 50 mM NaCl and were sprayed with 0.1, 0.5, and 1.0 mM salicylic acid (SA) to study the physiological processes determining salt tolerance and to observe the influence of SA application on the alleviation of NaCl-induced adverse effects. The content of leaf Na+, Cl−, H2O2, TBARS, and electrolyte leakage and the activity of SOD were higher in PBM16 than Alankar. In contrast, nutrients content, activity of APX and GR, glutathione content, photosynthetic and growth characteristics were higher in Alankar. Treatment of 50 mM NaCl resulted in increase of Na+ and Cl−, oxidative stress, activity of antioxidant enzymes and glutathione content, while nutrients content, photosynthetic, and growth characteristics decreased in both the cultivars. Application of 0.5 mM SA alleviated the negative effects of 50 mM NaCl maximally, but 1.0 mM SA proved inhibitory. The effect of SA was more conspicuous in Alankar than PBM16. It is concluded that the higher tolerance of Alankar was due to its lower leaf Na+ and Cl− content, higher nutrients content, and efficient antioxidant metabolism. The application of 0.5 mM SA substantially alleviated salt-induced adverse effects in Alankar.

Details

ISSN :
18611664 and 01375881
Volume :
33
Database :
OpenAIRE
Journal :
Acta Physiologiae Plantarum
Accession number :
edsair.doi...........d7b6794e488675b8e34cd9c948384022
Full Text :
https://doi.org/10.1007/s11738-010-0614-7