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Table 4 Means and standard errors for plant height show the impact of the growth stages (tillering, booting, flowering and anthesis), the stress durations (0, 7, 14, 21-days), and the periodic stress in response to drought for specific alleles of the reduced height genes

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

Description

Tall, Rht-a/a

Semi-dwarf, Rht-a/b

Dwarf, Rht-b/b

Growth stage effect

Tillering-nonstress (control)

70.67 ± 3.05

50.21 ± 2.64

16.33 ± 5.28

Tillering imposed stress

50.63 ± 2.5*

41.01 ± 2.17*

17.28 ± 4.35

Booting-nonstress (control)

70.44 ± 2.03

48.67 ± 1.76

17.67 ± 3.5

Booting imposed stress

32.63 ± 3.0**

30.82 ± 2.6**

13.83 ± 5.2

Heading-nonstress (control)

67.0 ± 2.06

46.83 ± 1.78

16.17 ± 3.57

Heading imposed stress

62.78 ± 1.82

44.42 ± 1.58

12.28 ± 3.16*

Anthesis-nonstress (control)

67.11 ± 1.71

46.33 ± 1.48

14.0 ± 2.9

Anthesis imposed stress

52.15 ± 1.90*

40.25 ± 1.64*

13.05 ± 3.29

Stress duration effect

0-day

68.80 ± 1.11

48.01 ± 0.96

16.04 ± 1.92

7-day

53.28 ± 2.33**

42.36 ± 2.02*

14.0 ± 4.03

14-day

47.55 ± 2.10**

39.22 ± 1.82**

14.87 ± 3.64

21-day

47.80 ± 2.63**

35.79 ± 2.28**

13.46 ± 4.56

Periodic stress effect

Periodic-nonstress control (0 day)

63.77 ± 1.65

44.33 ± 1.43

14.17 ± 2.86

Periodic-7 day

38.89 ± 3.55**

33.08 ± 3.08*

14.17 ± 6.16

Periodic-14 day

44 ± 3.98*

31.92 ± 3.4*

12.67 ± 6.89

Periodic-21 day

47.44 ± 4.4*

28.92 ± 3.81*

9.5 ± 7.6*

  1. * and ** Significant at P < 0.1 and 0.05 level of probability, respectively by the LSD test