Table 1.

Effect of heat stress treatment on the growth of pathogenesis‐related protein 10 (PR10) RNAi transgenic callus lines.

Callus line	Weight change (%) (±standard deviation)*
	Control (28 °C)	Heat stressed (37 °C)
Neg 43	50.3 ± 6.5	51.4 ± 4.0
4	53.4 ± 9.1	26.9 ± 6.3†
6	59.2 ± 7.6	21.8 ± 6.8†
8	57.7 ± 6.8	33.7 ± 3.7†

^* The percentage weight change was the difference between the final callus weight 2 weeks after treatment and the initial callus weight divided by the initial callus weight.

^† Indicates significant reduction in growth compared with the same callus line kept at 28 °C.