Effect of Salicylic Acid on Salinity‐induced Changes in Brassica juncea

Abstract

Seeds of Indian mustard (Brassica juncea (L.) Czern. et Coss.) were exposed to 0, 50, 100 and 150 mmol/L NaCl for 8 h and seeds were sown in an earthen pot. These stressed seedlings were subsequently sprayed with 10 micromol/L salicylic acid (SA) at 30 d and were sampled at 60 d to assess the changes in growth, photosynthesis and antioxidant enzymes. The seedlings raised from the seeds treated with NaCl had significantly reduced growth and the activities of carbonic anhydrase, nitrate reductase and photosynthesis, and the decrease was proportional to the increase in NaCl concentration. However, the antioxidant enzymes (catalase, peroxidase and superoxide dismutase) and proline content was enhanced in response to NaCl and/or SA treatment, where their interaction had an additive effect. Moreover, the toxic effects generated by the lower concentration of NaCl (50 mmol/L) were completely overcome by the application of SA. It was, therefore, concluded that SA ameliorated the stress generated by NaCl through the alleviated antioxidant system.

Effect of Salicylic Acid Pretreatment on Yield, Its Components and Remobilization of Stored Material of Wheat under Drought Stress

“…There are some reports that Salicylic acid could increase salt tolerance in wheat seedling (Kang et al, 2002) and drought stress (Janda, 1999). Different biochemical and physiological responses of plants to salicylic acid were reported (Yusuf, 2008). These effects are ion absorption, membrane permeability and mitochondrial respiration (Glass, 1974).…”

“…This is the latest member of yield determination and is the only part of total yield which is related to environment after florescence (Envns et al, 1993). Salicylic acid increased activity of antioxidant enzymes such as catalase, peroxidase and superoxide dismutase when it was sprayed on the wheat crop (Yusuf et al, 2008). Application of salicylic acid on wheat seedling resulted in big seed size, higher seed weight and total yield (Sakhabutdinova et al, 2003).…”

Growth of tomato (Lycopersicon esculentum) in response to salicylic acid under water stress

“…The disease resistance and abiotic stress tolerance are the other roles assigned to SA (Janda et al 2007). Among abiotic stresses, SA has been reported to counter heavy metal stress (Choudhary and Panda 2004), low temperature (Tasgin et al 2003), high temperature (He et al 2005) and salinity (Yusuf et al 2008).…”

Physiological and biochemical traits as tools to screen sensitive and resistant varieties of tomatoes exposed to salt stress

“…The damage caused by salt stress can also be attributed to the physiological drought generated by NaCl (Hopkins, 1995) as evident from the decreased WUE ( Figure 2F). Likewise, decrease in photosynthetic attributes (P N , g s , C i , E, and WUE) in response to salinity has also been reported in Brassica juncea (Yusuf et al, 2008). Moreover, a linear decrease in the quantum yield of PS II ( Figure 3A) was also observed in the genotypes of tomato.…”