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Table 2 Physiological parameters in young and old fronds of P. cretica var. Albo-lineata

From: Effect of arsenic stress on 5-methylcytosine, photosynthetic parameters and nutrient content in arsenic hyperaccumulator Pteris cretica (L.) var. Albo-lineata

ParametersYoung frondsOld fronds
 controlAs100controlAs100As250
x̄ ± SDx̄ ± SDx̄ ± SDx̄ ± SDx̄ ± SD
Chl A (nmol ml−1)11 ± 0.2bB10 ± 0.5aB2.6 ± 0.6bA1.5 ± 0.4abA1.0 ± 0.5a
Chl B (nmol ml− 1)4.8 ± 1.0bB2.8 ± 0.2aB2.6 ± 0.7bA1.9 ± 0.4abA0.6 ± 0.2a
Chl A/Chl B (−)2.4 ± 0.4aB3.6 ± 0.03bB1.1 ± 0.7aA0.9 ± 0.5aA1.4 ± 0.4a
Σ Chl (nmol ml− 1)16 ± 1.0bB13 ± 0.7aB5.2 ± 0.1bA3.4 ± 0.3abA1.6 ± 0.7a
Crt (nmol ml− 1)2.4 ± 0.1aB2.3 ± 0.3aB0.5 ± 0.2aA0.3 ± 0.1aA0.3 ± 0.04a
Fv/Fm (µmol m-2 s-1)0.8 ± 0.02bB0.7 ± 0.03aB0.7 ± 0.02bA0.6 ± 0.07aA0.5 ± 0.1a
WP (MPa)−1.4 ± 0.09aB−1.9 ± 0.03bB−1.7 ± 0.04aA−3.7 ± 0.03bA−2.5 ± 0.4ab
E(mmol H2O m−2 s−1)0.7 ± 0.2aA0.9 ± 0.2bA0.8 ± 0.1bA0.7 ± 0.1aA0.3 ± 0.04a
PN (μmol CO2 m− 2 s− 1)8.1 ± 0.1bB7.7 ± 0.04aB7.7 ± 0.04bA7.2 ± 0.03abA6.7 ± 0.1a
WUE (−)12 ± 2.7bA8.6 ± 1.3aA9.7 ± 1.2aA9.4 ± 0.6aA24.4 ± 1.6b