Gas Exchange and Productivity in Temperate and Droughty Years of Four Eastern, Elite Loblolly Pine Genotypes Grown in the Western Gulf Region

Table 3

Stomatal conductance (; mmol·m⁻²·s⁻¹) of previous- and current-year foliage of loblolly pine genotypes at a site in North Central Louisiana in 2009 (temperate year) and 2010 (droughty year).

	2009				2010
	April	June	August	November	May	June	August	September
Previous year
HS756	0.054^a	0.070^a	0.073^a	—	0.063^a	0.015^a	0.006^a	0.003^a
HS8103	0.040^ab	0.082^a	0.063^a	—	0.072^a	0.011^a	0.005^a	0.004^a
V9	0.043^ab	0.062^a	0.057^a	—	0.058^a	0.014^a	0.006^a	0.004^a
V93	0.032^b	0.067^a	0.078^a	—	0.062^a	0.016^a	0.006^a	0.002^a
Current year
HS756	—	0.083^a	0.082^a	0.043^a	—	0.033^a	0.013^a	0.003^a
HS8103	—	0.096^a	0.070^ab	0.050^a	—	0.030^a	0.012^a	0.005^a
V9	—	0.076^a	0.062^ab	0.044^a	—	0.032^a	0.013^a	0.005^a
V93	—	0.094^a	0.058^b	0.052^a	—	0.033^a	0.011^a	0.002^b

For each year and foliage flush, means within a column followed by different letters are different at .