. 2014 Jan 20;9(1):e86217. doi: 10.1371/journal.pone.0086217

Table 2. Physiological changes in GA-deficient and GA-insensitive poplars under well-watered and drought conditions.

Condition	Genotype	Total Chlorophyll(mg g⁻¹)^a	Chlorophyll a/b ratio^a	Carotenoid(mg g⁻¹)^a	Photosynthesis Rate (µmol m⁻²s⁻¹)^b	Transpiration Rate(mmol m²s⁻¹)^b	Stomatal Conductance(mol m⁻²s⁻¹)^b	Water Use Efficiency(µmol mmol⁻¹)
Watered	WT	1.28±0.05c	1.96±0.12a	0.24±0.01c	12.32±0.22b	6.00±0.29a	0.32±0.07ab	2.08±0.07b
	35S::GA2ox	2.37±0.09a	1.68±0.16ab	0.36±0.01a	15.65±0.56a	6.18±0.29a	0.39±0.07ab	2.51±0.06a
	35S::rgl1	1.63±0.03b	1.70±0.11ab	0.26±0.01b	13.98±0.33a	5.68±0.16a	0.35±0.06a	2.44±0.06a
	pGAI::gai	1.67±0.05b	1.38±0.10b	0.26±0.01b	14.07±0.17a	5.92±0.36a	0.35±0.07ab	2.54±0.14a
Drought	WT	1.55±0.03b	1.94±0.11a	0.28±0.01b	6.56±0.64c	1.73±0.18b	0.07±0.01b	3.93±0.17a
	35S::GA2ox	1.99±0.07a	1.96±0.12a	0.34±0.01a	10.3±0.45ab	2.97±0.3a	0.17±0.02a	3.72±0.20ab
	35S::rgl1	1.98±0.05a	1.94±0.17a	0.32±0.01a	8.44±0.65b	3.18±0.48a	0.20±0.04a	3.12±0.28ab
	pGAI::gai	2.12±0.06a	1.36±0.06b	0.33±0.01a	9.05±0.39ab	3.01±0.39a	0.18±0.04a	3.36±0.22b

Means±SE are based on at least three biological replications. Well-watered and drought conditions were analyzed separately. Statistically significant differences were determined by one-way ANOVA followed by Tukey’s post-hoc test (P<0.05). Letters following mean±SE indicate statistical significance, where treatment (i.e., Genotype) means with the same letter are not significantly different.

^a Drought measurements 5 weeks after withholding water.

^b Drought measurements 3 weeks after withholding water.