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Table 2 Grain number losses when drought stress was imposed at various developmental stages either as constant or periodic stress, including all the genotypes under 7, 14, 21-days of drought

From: Developmental program impacts phenological plasticity of spring wheat under drought

Stress exposure Developmental stage 0-day 7-day 14-day 21-day
Constant stress Tillering stage 26.96 ± 4.02 20.92 ± 4.70 14.33 ± 3.76 19.37 ± 2.82
Constant stress Booting stage 26.08 ± 3.50 14.67 ± 3.95* 10.17 ± 2.26* 2.42 ± 1.42**
Constant stress Heading stage 28.83 ± 3.58 12.75 ± 1.79* 16.21 ± 2.72* 14.83 ± 2.52*
Constant stress Anthesis stage 27.25 ± 3.01 12.21 ± 2.20* 10.62 ± 1.88* 11.42 ± 2.17*
Periodic stress All the stages 24.29 ± 2.25 6.29 ± 1.31* 3.46 ± 1.90* 9.25 ± 1.90*
  1. * Significant at the P < 0.05 probability by the LSD test compared to the non-stressed group (0-day), **Significant reduction at P < 0.05 compared to the non-stressed groups and other treatments