Role of defense enzymes, proteins, solutes and Δ1-pyrroline-5-carboxylate synthase in wheat tolerance to drought

摘要: Growth parameters of 17-day-old wheat seedlings (Sids4, Sd; Gmiza10, Gm) were similar under normal control conditions; however, water deficit for the following 16 days (up to 33 days after sowing, DAS) led greater reductions in Gm than Sd, suggesting that Sd was more tolerant drought Gm. At same time, significant losses several proteins despite similarities detected both cultivars conditions extent 70 % lost on 33rd DAS relative only 40 % Sd. In contrast decreased catalase (CAT) and peroxidase (POX) isozymes Rubisco as well expression Δ1-pyrroline-5-carboxylate synthase (P5CS) gene concomitant with slight effects, if any, soluble sugars, glycine betaine (GB), free amino acids proline. Three CAT ten POX cultivars; nonetheless, down expressed some these particularly The impacts accumulation GB, proline by higher magnitude increased severity. Also, a rise P5CS but caused decline After rewatering, Gm, reach level control. synchronous increases transcription concludes adaptation is efficient cultivar. support, rewatering elevation concluding this mechanism effective stress conditions.