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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