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Table 2 Effects of irrigation water salinity (ECiw, dS m− 1) and leaching fraction (LF) on maximum apparent quantum yield of CO2 (α, mol CO2 mol− 1 photons), irradiance–saturated rate of gross photosynthesis (Pn max, μmol m− 2 s− 1), dark respiration rate (Rd, μmol CO2 m− 2 s− 1), and dimensionless convexity term (κ) derived from the photosynthetic light–response curve and on carboxylation efficiency (ε, mol m− 2 s− 1), photosynthetic capacity (Pn sat, μmol CO2 m− 2 s− 1), photorespiration rate (Rp, μmol CO2 m− 2 s− 1) derived from the photosynthetic CO2–response curve. The light–response curves were measured at a fixed CO2 concentration of 400 μmol mol− 1. Measurements of CO2–response curves were conducted at a fixed PPFD of 1200 μmol m− 2 s− 1

From: An investigation on possible effect of leaching fractions physiological responses of hot pepper plants to irrigation water salinity

Factors

α

P n max

κ

R d

ε

P n sat

R p

ECiw

 0.9

0.052a

19.9a

0.53

2.07

0.224a

61.0a

12.7a

 4.7

0.047a

15.7b

0.78

1.78

0.188a

55.7a

11.2a

 7.0

0.030b

8.6c

0.83

1.43

0.109b

42.8b

7.5b

LF

 0.17

0.045

16.4

0.64

1.68

0.179

52.1

10.5

 0.29

0.042

14.2

0.75

1.96

0.168

54.2

10.4

ANOVA

 LF

NS

NS

NS

NS

NS

NS

NS

 ECiw

*

***

NS

NS

***

*

**

 LF × ECiw

NS

NS

NS

NS

NS

NS

NS

  1. *, ** and *** represent significant differences between means at 0.05, 0.01 and 0.001 level of probability, respectively; NS, no significant. Different letters within a column indicate significant difference at P < 0.05 by Duncan’s multiple range tests