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. 2012 Sep 28;7(9):e46206. doi: 10.1371/journal.pone.0046206

Table 1. Leaf biomass, chlorophyll content and PSI to PSII ratio of Col-0, Ws-4, and Ler-0 accessions.

Accession Shoot weight Leaf specific mass Leaf chlorophyll contenta PSI/PSIIb
g plant−1(n = 11–18) mg cm−2(n = 8–15) µg cm−2(n = 8–15) mg g−1(n = 8–15) Chl a/b(n = 8–15) (n = 3)
Col-0 5.72±0.69100% 16.77±1.18100 49.84±5.34100% 2.97±0.12100% 4.00±0.26 1.06±0.09
Ws-4 7.38±0.68*130% 13.32±0.47*79% 41.19±4.79*83% 3.09±0.17104% 3.80±0.04 1.11±0.02
Ler-0 4.42±0.83*77% 17.39±1.90103% 53.68±3.37108% 3.08±0.28103% 3.86±0.29 1.12±0.08
a

Leaf chlorophyll content was measured spectrophotometrically after extraction in ethanol, and expressed on leaf area and on fresh weight basis.

b

PSI/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 P<0.05).

The parameters were measured on plants grown hydroponically for six weeks at an irradiance of 120 µmol photons m−2 s−1.