Table 1 The results of contrast analysis of selected biochemical and physiological parameters in sweet cherry leaves exposed to one (CT1), two (CT2) or three (CT3) overnight chillings, sampled at time 0 or time 24 and compared with control in Experiment I.

From: Response of chloroplast pigments, sugars and phenolics of sweet cherry leaves to chilling

 

CT1

CT2

CT3

0

24

0

24

0

24

Chlorophyll a

ns

ns

ns

ns

ns

ns

Chlorophyll b

ns

ns

ns

ns

ns

ns

Chlorophyll a/b

ns

ns

ns

ns

ns

ns

Total chlorophylls

ns

ns

ns

ns

ns

ns

β-carotene

ns

ns

ns

ns

ns

ns

Lutein

ns

ns

ns

ns

ns

ns

Neoxanthin

ns

ns

ns

ns

ns

ns

Violaxanthin

ns

ns

ns

ns

ns

ns

Antheraxanthin

ns

ns

ns

ns

ns

ns

Zeaxanthin

ns

ns

ns

ns

ns

ns

Total carotenoids

ns

ns

ns

ns

ns

ns

VAZ

ns

ns

ns

ns

ns

ns

AZ/VAZ

ns

ns

ns

ns

↑***

ns

Fv/Fm

ns

ns

ns

ns

  1. *Statistically significant differences at P < 0.05; ***statistically significant differences at P < 0.001; ns, not significant; ↑ = increase in chilled leaves; ↓ = decrease in chilled leaves; –, not monitored; VAZ, xanthophyll cycle pigments; AZ/VAZ, deepoxidation state of xanthophyll cycle pool; Fv/Fm, maximum quantum yield of PS II.