Fig. 4. Relative expression levels of glycogen phosphorylase (GP), carnitine palmitoyltransferase I (cpt 1), glycogen synthase and acetyl CoA carboxylase of the two strains of Acyrthosiphon pisum in a 24-h starvation treatment; concentrations and amounts of the sugars in the honeydews of the two strains of Acyrthosiphon pisum. Relative expression levels of glycogen phosphorylase (GP), carnitine palmitoyltransferase I (cpt 1), glycogen synthase and acetyl CoA carboxylase of the two strains of Acyrthosiphon pisum in a 24-h starvation treatment; concentrations and amounts of the sugars in the honeydews of the two strains of Acyrthosiphon pisum. (A) Glycogen phosphorylase (GP); (B) carnitine palmitoyltransferase I (cpt 1); (C) glycogen synthase; (D) acetyl CoA carboxylase. (E) Concentrations of the sugars (fructose, glucose, sucrose, melezitose and trehalose) in fresh honeydew. (F) Total amounts of sugars in the honeydews in 24 h. Values represent mean±s.e.m. from independent determinations; *P<0.05, **P<0.01 (Student's t-test). Yi Zhang et al. Biology Open 2016;5:1535-1544 © 2016. Published by The Company of Biologists Ltd