Effects of salicylic acid and salinity on apoplastic antioxidant enzymes in two wheat cultivars differing in salt tolerance |
| |
Authors: | S Mutlu ? Atici and B Nalbantoglu |
| |
Institution: | (1) Department of Biology, Science Faculty, Atatürk University, 25240 Erzurum, Turkey;(2) Department of Chemistry, Science Faculty, Atatürk University, 25240 Erzurum, Turkey |
| |
Abstract: | The effects of salicylic acid (SA) and salinity on the activity of apoplastic antioxidant enzymes were studied in the leaves
of two wheat (Triticum aestivam L.) cultivars: salt-tolerant (Gerek-79) and salt-sensitive (Bezostaya). The leaves of 10-d-old seedlings grown at nutrient
solution with 0 (control), 250 or 500 mM NaCl were sprayed with 0.01 or 0.1 mM SA. Then, the activities of catalase (CAT),
peroxidase (POX) and superoxide dismutase (SOD) were determined in the fresh leaves obtained from 15-d-old seedlings. The
NaCl applications increased CAT and SOD activities in both cultivars, compared to those of untreated control plants. In addition,
the NaCl increased POX activity in the salt-tolerant while decreased in the salt-sensitive cultivar. In control plants of
the both cultivars, 0.1 mM SA increased CAT activity, while 0.01 mM SA slightly decreased it. SA treatments also stimulated
SOD and POX activity in the salt-tolerant cultivar but significantly decreased POX activity and had no effect on SOD activity
in the saltsensitive cultivar. Under salinity, the SA treatments significantly inhibited CAT activity, whereas increased POX
activity. The increases in POX activity caused by SA were more pronounced in the salt-tolerant than in the salt-sensitive
cultivar. SOD activity was increased by 0.01 mM SA in the salt-tolerant while increased by 0.1 mM SA treatment in the salt-sensitive
cultivar. |
| |
Keywords: | Additional" target="_blank">Additional catalase NaCl stress peroxidase superoxide dismutase Triticum aestivum |
本文献已被 SpringerLink 等数据库收录! |
|