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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