Leaf biomass, chlorophyll content and PSI to PSII ratio of Col-0, Ws-4, and Ler-0 accessions.

aLeaf chlorophyll content was measured spectrophotometrically after extraction in ethanol, and expressed on leaf area and on fresh weight basis.bPSI/PSII ratio was measured by EPR spectroscopy in isolated thylakoids.The data were expressed as means ±SD (n = number of replicates). The parameters were also expressed relative to Col-0. *, Significantly different from Col-0 (Student's t-test PThe parameters were measured on plants grown hydroponically for six weeks at an irradiance of 120 µmol photons m−2 s−1.