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. 2003 Oct;133(2):930–940. doi: 10.1104/pp.103.026138

Figure 4.

Figure 4.

Relative HPT specific activity in control and stressed wild-type and 35S::HPT1 Arabidopsis chloroplasts. Six-week-old plants were transferred to high light (0.8–1 mmol photons m–2 s–1) for 3 and 6 d, and chloroplasts were isolated and assayed for HPT activity. Results from two independent experiments are presented as an average ± sd of the activity increase relative to wild-type non-stressed chloroplasts (0.15 ± 0.10 pmol h–1 mg–1 protein). Abiotic stress resulted in the strong induction of HPT activity relative to control plants in both wild type and 35S::HPT1. Relative HPT specific activity in 35S::HPT1 was significantly higher (P < 0.0005) than in wild type at all time points.