Response of wheat cultivars to salt stress by leaf chlorophyll fluorescence method

In laboratory experiments, the varietal specificity of formation adaptive reactions 10-16 day-old seedlings three varieties spring wheat under chloride salinization (1.3%) according to daily dynamics chlorophyll fluorescence parameters (ChF) was established. The informative value ChF Y(II), ETR, qP, Fv/Fm, Fv/Fo, Y(NPQ), qN and Y(NQ) as reliable biomarkers for early assessment resistance at level photosynthetic apparatus has been confirmed. reaction more stable Sibirskaya 21 variety less pronounced compared Novosibirskaya 29 41. smallest changes in relative control. greatest intervarietal differences were manifested 16-day-old seedlings. activity during can serve a criterion stress resistance, which will speed up selection breeding material increase its efficiency due rejection unpromising samples.