Table 1.

Relative cytokinin (CTK) concentrations in panicles and roots under high temperature treatments.

Treatment	Variety	CTKs in the panicles			CTKs in the roots
		tZ+tZR	iPMP+iP+iPA	aCTKs	tZ+tZR	iPMP+iP+iPA	aCTKs
HNT	N22	0.95a	0.69b∗	0.80b∗	0.95a	0.97a	0.95a
	HHZ	0.77b∗	0.63b∗	0.69c∗	0.97a	0.92a	0.96a
	LYPJ	0.78b∗	0.71b∗	0.74bc∗	0.99a	0.91a	0.97a
	SY63	1.02a	0.85a∗	0.90a∗	0.98a	0.97a	0.98a
HDT	N22	0.88b∗	0.77a∗	0.80b∗	0.97a	0.93a	0.95a
	HHZ	0.84bc∗	0.34c∗	0.57c∗	0.96a	0.94a	0.95a
	LYPJ	0.73c∗	0.59b∗	0.65c∗	0.87b∗	0.87a∗	0.87b∗
	SY63	1.00a	0.85a∗	0.90a∗	0.98a	0.89a	0.96a
ADT	N22	0.71b∗	0.32b∗	0.45b∗	0.96a	0.90a	0.92ab
	HHZ	0.67b∗	0.27b∗	0.45b∗	0.94a	0.89a	0.93a
	LYPJ	0.61b∗	0.30b∗	0.43b∗	0.77b∗	0.81a∗	0.78b∗
	SY63	1.00a	0.83a∗	0.84a∗	0.96a	0.91a	0.93a

Relative values were presented in the table. A relative value was defined as the ratio of the score under a high temperature treatment to that under the control treatment for the same trait in the same variety. Different letters indicate significant differences among varieties under the same temperature treatment by a least significant difference (LSD) test at P < 0.05. A relative value less or more than 1.0 indicated a decrease or increase in a trait under a high temperature treatment compared with that under the control condition, respectively. Asterisks indicate significant differences when comparing the absolute mean of a trait under a given high temperature treatment with that under the control by LSD test at P < 0.05.