. Author manuscript; available in PMC: 2016 May 12.

Published in final edited form as: J Plant Physiol. 2015 Sep 9;194:2–12. doi: 10.1016/j.jplph.2015.09.002

Table 3.

Photosynthesis-irradiance curve parameters of the Klebsormidium strains studied. Data were recorded as oxygen evolution using an oxygen optode at 25 °C and for the 3 African Strains fitted with the photosynthesis model of Webb et al. (1974) without photoinhibition. α: positive slope at limiting photon fluence rates (μmol O₂ mg⁻¹ Chl. a (μmol photons m⁻² s⁻¹)⁻¹); I_c: light compensation point (μmol photons m⁻² s⁻¹); I_k: initial value of light-saturated photosynthesis (μmol photons m⁻² s⁻¹). In addition, the chlorophyll a: chlorophyll b ratios are given. Data represent mean values ± SD of 3 replicates. The significance of differences among the strains, as indicated by different letters (capital letters for α; small letters for I_c; cursive capital letters for I_k) was calculated by one-way ANOVA (p < 0.001) and Tukey’s post hoc test.

Strain number	α	I _c	I _k	Chl. a: Chl. b
Klebsormidium sp. BIOTA 14614.7 (African Strain A)	5.73 ± 1.39^A	14.65 ± 2.27^a	18.83 ± 2.69^A	2.43 ± 0.26^a
Klebsormidium sp. BIOTA 14613.5e (African Strain B)	10.93 ± 2.56^B	4.44 ± 0.78^b	19.99 ± 3.16^A	2.10 ± 0.31^a
Klebsormidium sp.BIOTA 14614.18.24(African Strain C)	12.40 ± 1.96^B	5.86 ± 1.19^b	14.11 ± 2.71^B	2.07 ± 0.17^a
Klebsormidium subtilissimum SAG 384-1 (Arctic Strain)	8.29 ± 2.63^B	10.55 ± 2.09^a	23.56 ± 3.34^A	1.86 ± 0.15^b