Interaction of salicylic acid and ethylene and their effects on some physiological and biochemical parameters in canola plants (Brassica napus L.)

Abstract

Environmental stresses, such as cold, heat, salinity, and drought, induce ethylene production and oxidative stress and cause damage in plants. On the other hand, studies have shown that salicylic acid (SA) induced resistance to environmental stresses in plants. In this research, the effects of ethylene on chlorophyll (Chl), carotenoid (Car), anthocyanin, flavonoids, ascorbic acid, dehydroascorbic acid, total ascorbate, lipid peroxidation, and ethylene production in leaves of canola pretreated with SA were studied. The plants were grown in pots until they have four leaves. Leaves were sprayed for two days with three different concentrations of SA (0, 0.5, and 1 mM). The plants were treated for three days with three concentrations of ethylene (0, 50, and 100 ppm). At the end of the ethylene treatments, all examined parameters were measured. The results showed that the ethylene treatments induced lipid peroxidation, while SA mitigated this effect. The ethylene treatment lowered significantly Chl and Car contents and anthocyanin accumulation, but SA alleviated these effects. SA induced an increase in ascorbic acid content in canola plants after the ethylene treatments. Therefore, we concluded that SA played an important role in the alleviation of damages caused by stress conditions.

Effects and management strategies to mitigate drought stress in oilseed rape (Brassica napus L.): a review

“…Similar effects of salicylic acid were reported by Hayat et al (2008). Salicylic acid also reduces the lipid peroxidation in plants under drought (Tirani et al, 2013). Ascorbate peroxidase production increases in plants when sprayed with ascorbic acid.…”

Salicylic acid supplementation improves photosynthesis and growth in mustard through changes in proline accumulation and ethylene formation under drought stress

“…Recently, Khan et al (2014) have shown that the SA improves glycine betaine accumulation and suppresses the ethylene formation in mung bean resulting in improved photosynthesis and growth. It is also reported that ethylene causes oxidative stress and supplementation of SA could improve stress tolerance in canola plants (Tirani et al, 2013). Li et al (1992) have observed that a marked decrease in transcript level occurred in the presence of salicylic acid, which correlated with a strong inhibition in the production of ACC synthase activity in tomato plants.…”

Salicylic acid and photosynthesis: signalling and effects

“…It has been well documented that exogenous SA may alleviate the damaging effects of various stress factors, and this protection can also be manifested in higher photosynthetic capacity (Horváth et al 2007, Hayat et al 2010, Radwan and Soltan 2012, Sasheva et al 2013, Tirani et al 2013. For example, pre-soaking of seeds in 0.5 mM SA solution for 6 h before sowing substantially decreased harmful effects of cadmium on CO 2 fixation in maize (Krantev et al 2008) or pea ).…”