. 2018 Jul 5;6:e5138. doi: 10.7717/peerj.5138

Table 1. Actual mean (±SE) CO₂ concentration and temperature in the open-top chambers (OTC) from seedling emergence to harvest of transgenic Bt maize and its parental line of non-Bt maize in 2016 and 2017.

Climate factors	OTC	2016	2017	Two-way ANOVAs (F/P values)
CO₂ (μl/L)	eCO₂ OTC	744.4 ± 3.3^{a, A}	748.8 ± 4.5^{a, A}	F_CO2 = 399.32, P = 0.000
				F_Year = 2.85, P = 0.13
	aCO₂ OTC	372.6 ± 4.7^{b, A}	374.5 ± 3.8^{b, A}	F_Interaction = 0.45, P = 0.52
Temperature (°C)	eCO₂ OTC	26.01 ± 0.5^{a, A}	26.12 ± 0.3^{a, A}	F_CO2 = 0.006, P = 0.94
				F_Year = 3.38, P = 0.10
	aCO₂ OTC	25.99 ± 0.4^{a, A}	26.11 ± 0.4^{a, A}	F_Interaction = 0.057, P = 0.82

Notes:

OTC: ambient-CO₂ OTC (aCO₂ OTC) and elevated-CO₂ OTC (eCO₂ OTC). Different lowercase letters indicate significantly different between the eCO₂ OTC and aCO₂ OTC in same year by the Duncan test at P < 0.05, respectively.

Not significantly different between 2016 and 2017 at same CO₂ level or temperature by the Duncan test at P > 0.05, respectively.

Table 1. Actual mean (±SE) CO2 concentration and temperature in the open-top chambers (OTC) from seedling emergence to harvest of transgenic Bt maize and its parental line of non-Bt maize in 2016 and 2017.

Table 1. Actual mean (±SE) CO₂ concentration and temperature in the open-top chambers (OTC) from seedling emergence to harvest of transgenic Bt maize and its parental line of non-Bt maize in 2016 and 2017.