Table 1.

Leaf viability in wild-type versus ugt80A2,B1 double mutant plants in response to a 12-h heat treatment at 45 °C at 30 day (d) of age. The number of rosette leaves of untreated plants was determined at 30 d and 42 d. Leaves of treated plants were counted 12 d after the onset of the 12 h heat treatment. Student’s t-test indicated that the untreated double mutant plants had fewer leaves at 42 d than wild-type plants (p < 0.05). However, the number of leaves in heat-treated wild-type and ugt80A2,B1 double mutant plants was not significantly different.

	n (Number of Plants of Each Line)	Number of Viable Rosette Leaves
		Wild-Type	ugt80A2,B1 Double Mutant
Untreated, grown at 21 °C (30 d)	324	9.9 ± 1.7	9.8 ± 1.6
Untreated control, grown at 21 °C (42 d)	103	18.3 ± 1.4	17.8 ± 1.4 *
Treated at 45 °C for 12 h at 30 days, otherwise grown at 21 °C (42 d)	108	10.9 ± 3.3	10.5 ± 3.2