Table I. The effects of LTAC, ETAC, and ETEC on photosynthetic gas exchange, chlorophyll fluorescence, photosynthetic pigments, and carbohydrates

Tukey's HSD multiple comparisons of means indicate significant differences (Sig.) between treatment pairs following two-way ANOVA (Table S1). (*** P < 0.001; ** P < 0.01; * P < 0.05; n.s., not significant).

CategoryParameterLTAC vs. ETACETAC vs. ETECLTAC vs. ETEC
PSig.PSig.PSig.
Photosynthetic gas exchangeAnet<0.001***<0.001***<0.001***
gs<0.001***<0.001**0.813n.s.
Rd0.002**0.084n.s.0.128n.s.
E<0.001***0.002**<0.001***
IWUE0.208n.s.<0.001***<0.001***
Chlorophyll fluorescenceFv/Fm<0.001***0.049*<0.001***
ΦPSII<0.001***0.314n.s.<0.001***
NPQ0.001**0.673n.s.<0.001***
NPQS<0.001***0.037*<0.001***
1 − qP<0.001***<0.001***<0.001***
Photosynthetic pigmentsTotal Chl<0.001***<0.001***0.383n.s.
Car/Chl<0.001***<0.001***0.336n.s.
Chl a/b0.023*0.094n.s.<0.001***
V+A+Z/Chl<0.001***<0.001***<0.001***
DEPS<0.001***<0.001***<0.001***
CarbohydratesStarch0.009**<0.001***0.094n.s.
Soluble sugars0.247n.s.0.709n.s.0.419n.s.
Sucrose0.011*0.025*0.742n.s.
Hexose<0.001***0.102n.s.<0.001***
Pinitol0.043*0.417n.s.0.210n.s.
Raffinose<0.001***0.697n.s.<0.001***