Skip to main content

Table 2 Effect of PHN on energy metabolism after 24 h of treatment

From: Unraveling the early molecular and physiological mechanisms involved in response to phenanthrene exposure

  Control Phenantrene Rank sum test
(DMSO) 200 μM
Chlorophyll (mg.g-1 FW) 0.45 ± 0.09 0.73 ± 0.11 P = 0.004
Respiration with respect to chlorophyll content (nmolO2.h−1.mg−1 chlorophyll−1) 19.62 ± 2.52 16.11 ± 2.65 ns (P = 0.065)
Respiration with respect to fresh weight (nmolO2.h−1.mg FW−1) 8.74 ± 1.33 11.72 ± 2.72 P = 0.041
Cyanide-resistant respiration (%) 46.86 ± 5.07 48.70 ± 7.6 ns (P = 0.485)
Photosynthesis with respect to chlorophyll content (nmolO2.h−1.mg−1 chlorophyll−1) 79.11 ± 5.96 40.56 ± 6.62 P = 0.004
Photosynthesis with respect to fresh weight (nmolO2.h−1.mg FW−1) 35.93 ± 6.31 29.46 ± 6.46 ns (P = 0.082)
Photosynthesis/respiration ratio 4.10 ± 0.34 2.54 ± 0.35 P = 0.004
  1. Four-week-old plants grown in vitro in MS/2 medium were treated for 24 h with 200 μM PHN before measurements of leaf chlorophyll content, respiration and photosynthesis. Data are indicated as average with SD (n = 5 or 6), and due to the small sample size, a non-parametric Mann–Whitney rank sum test was applied (ns non significant)