Abstract
Salt stress, an abiotic stress, determines modifications of some biochemical indicators, like, antioxidant enzymes, proline (amino acidaccumulate in higher plants under salinity stress) content, and some physiological processes including: plant growth and development. Inthis paper we studied the influence of exogenous treatment of wheat seeds, with 0.1 mM salicylic acid (SA) solution, in the plant response tosalt stress. The treatment was applied by presoaking the seeds in the treatment solution for 12 hours before germination. The results showedthat exogenous 0.1 mM SA solution, administrated to the wheat cariopses significantly ameliorated the negative effect of salt stress in firstweek of germination in laboratory conditions.
Highlights
Salicylic acid (SA) acts as a potential non-enzymatic antioxidant as well as a plant growth regulator
The germination was made in plastic recipients, for 7 days, on a filter paper, moistened with 20 ml treatment solution: control lot (C) – 12 h soaked in water and germinated in water. sample 1 (S1) – 12 h soaked in water and germinated in 200 mM NaCl solution; sample 2 (S2) – 12 h soaked in 0.1 mM SA and germinated in 200 mM NaCl solution
Studying the growth of the embrionary roots of the wheat seedlings obtained from the seeds germination under laboratory conditions, after 7 days of germination, we observed that the salt treatments significantly reduced growth in length with 30.77%, and decreased with 22.81% the relative water content of the wheat plantlets
Summary
Salicylic acid (SA) acts as a potential non-enzymatic antioxidant as well as a plant growth regulator. Plant growth and development was intensly affected by different adverse environmental conditions and by pathogens. Salicylic acid could ameliorate the damaging effects of heavy metals in rice (Mishra and Choudhuri, 1999), drought stress in wheat (Waseem et al,2006) and salt stress in wheat (Arfan et al, 2007) and in sunflower plants (Noreen et al, 2009). The application of Salicylic Acid, Acetylsalicylic Acid or other analogues of SA, to leaves of maize and soybean accelerated the growth of their leaf area, and the dry mass production, but plant height and root length remained unaffected (Khan et al 2003). Out of the various concentrations of SA solutions used, Fariduddin et al 2003, observed maximum increase in dry matter accumulation at a concentration of 10-5 M, supplemented to the leaves of the standing plants of Brassica juncea, but any concentration higher than this proved to have an inhibitory effect
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