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Table 3 Comparison of physiological attributes of N22, BIM, and their F2 rice under 28 °C, 35 °C, and 42 °C conditions

From: Phenological and physiological responses of hybrid rice under different high-temperature at seedling stage

Treatment (°C)

Variety

Photosynthetic rate (μmol CO2 m−2 s−1)

Stomatal conductance (mol CO2 m−2 s−1)

Transpiration rate (μmol m−2 s−1)

Leaf temperature (°C)

28

N22

1.03 a

0.05 b

0.9 a

28.0 a

 

BIM

1.46 a

0.07 a

0.8 a

28.3 a

 

F2

0.43 a

0.02 c

0.4 b

28.2 a

  

ns

**

**

***

35

N22

0.59 a

0.08 a

1.3 a

29.3 c

 

BIM

0.45 a

0.03 b

0.8 b

30.6 a

 

F2

0.54 a

0.04 b

0.8 b

29.9 b

  

ns

**

**

***

42

N22

0.44 a

0.1 a

2.1 a

27.9 c

 

BIM

0.21 a

0.09 b

1.4 b

29.6 a

 

F2

0.42 a

0.1 a

2.1 a

28.8 b

  

ns

**

*

***

  1. The data represented as mean (n = 20). Significant differences are shown by letters across three temperature within each treatment of two varieties and their F2 hybrid
  2. ***p < 0.001, **p < 0.01, *p < 0.05 and ns: not significant