. 2014 Sep 9;166(3):1560–1574. doi: 10.1104/pp.114.247866

Table I. Leaf and photosynthetic characteristics of wild-type N. tabacum, two knockdown lines (RI9 and RI29) with reduced AOX, and an AOX-overexpressing line (B7).

All analyses used the fourth or fifth fully developed leaves of well-watered or moderate drought-stressed plants. The Φ_PSII, g_s, g_m, C_i, and C_c values were measured at saturating irradiance (1,600 PPFD) and C_a of 400 µmol mol⁻¹. Results are the mean ± se of at least three independent experiments. Within each treatment, plant lines not sharing a common superscript letter are significantly different from one another (P < 0.05).

Parameter	Well-Watered Plants				Moderate Drought-Stressed Plants
Parameter	B7	Wild Type	RI9	RI29	B7	Wild Type	RI9	RI29
Leaf RWC (%)	87 ± 2^a	89 ± 2^a	87 ± 2^a	88 ± 3^a	76 ± 1^a	77 ± 3^a	78 ± 2^a	77 ± 1^a
F_v/F_m	0.81 ± 0.009^a	0.80 ± 0.007^a	0.82 ± 0.009^a	0.81 ± 0.003^a	0.79 ± 0.012^a	0.80 ± 0.007^a	0.81 ± 0.006^a	0.80 ± 0.012^a
Φ_PSII	0.211 ± 0.014^a	0.221 ± 0.013^a	0.220 ± 0.017^a	0.208 ± 0.018^a	0.156 ± 0.010^a	0.141 ± 0.060^a	0.100 ± 0.011^b	0.089 ± 0.011^b
g_s (mol m⁻² s⁻¹)	0.150 ± 0.015^a	0.160 ± 0.012^a	0.143 ± 0.014^a,b	0.126 ± 0.015^b	0.100 ± 0.006^a	0.103 ± 0.009^a	0.090 ± 0.005^a	0.087 ± 0.007^a
g_m (mol m⁻² s⁻¹)	0.115 ± 0.003^a	0.121 ± 0.004^a	0.113 ± 0.005^a	0.121 ± 0.013^a	0.113 ± 0.004^a	0.111 ± 0.005^a	0.110 ± 0.008^a	0.119 ± 0.008^a
C_i (µmol mol⁻¹)	309 ± 14^a	320 ± 10^a	318 ± 13^a	263 ± 8^b	212 ± 11^a	201 ± 16^a	189 ± 5^a	196 ± 9^a
C_c (µmol mol⁻¹)	227 ± 8^a,b	240 ± 9^a	237 ± 8^a	194 ± 9^b	160 ± 10^a	154 ± 9^a	156 ± 18^a	150 ± 8^a
CE (CO₂ m⁻² s⁻¹/mol⁻¹ CO₂)	0.071 ± 0.001^a	0.066 ± 0.003^a	0.073 ± 0.005^a	0.061 ± 0.007^a	0.046 ± 0.003^a	0.051 ± 0.008^a	0.039 ± 0.006^a	0.030 ± 0.003^b
Total Chl (mg m⁻² leaf area)	334 ± 35^a	320 ± 36^a	337 ± 26^a	331 ± 20^a	300 ± 33^a	288 ± 31^a,b	259 ± 29^a,b	248 ± 16^b
Chl a (mg m⁻²)	223 ± 19^a	231 ± 23^a	235 ± 12^a	234 ± 14^a	202 ± 16^a	196 ± 15^a,b	165 ± 13^b,c	154 ± 10^c
Chl b (mg m⁻²)	111 ± 16^a	89 ± 13^a	102 ± 14^a	97 ± 8^a	97 ± 17^a	93 ± 17^a	94 ± 16^a	94 ± 14^a
Chl a/b (ratio)	2.18 ± 0.14^b	2.63 ± 0.15^a	2.35 ± 0.21^a,b	2.44 ± 0.16^a,b	2.19 ± 0.27^a	2.20 ± 0.25^a	1.81 ± 0.18^b	1.73 ± 0.33^b
Protein (g m⁻² leaf area)	2.82 ± 0.12^a	2.94 ± 0.10^a	2.97 ± 0.06^a	2.85 ± 0.09^a	2.63 ± 0.15^a	2.55 ± 0.06^a,b	2.29 ± 0.13^b	2.40 ± 0.19^a,b