Table 3.

Summary of the correlation coefficients between the rate of starch accumulation, the starch content, the 1000-grain weight, and the enzyme activities after LT stress at booting stage.

Cultivars		AGPase	SSS	GBSS	SBE
Yangmai 18	SAR	0.5539*	0.8531**	0.4395	0.1316
	SC	0.5176*	0.0993	0.3687	0.5696**
	GW	0.4089	−0.0232	0.2555	0.5079*
Yannong 19	SAR	0.5608*	0.7254**	0.1912	0.0921
	SC	0.4182	0.3175	0.7283**	0.5855**
	GW	0.2255	0.142	0.6080**	0.5129*

AGPase, ADP-glucose pyrophosphorylase activity (U.g⁻¹FW); SSS, soluble starch synthase activity (U.g⁻¹FW); GBSS, granule-bound starch synthase activity (U.g⁻¹FW); SBE, starch branching enzyme activity (U.g⁻¹FW); SAR, starch accumulation rate (g.grain⁻¹.d⁻¹); SC, starch content (mg.g⁻¹DW); GW, 1000-grain weight (g).

* and ** indicate significant differences at 0.05 and 0.01 level, R_0.05 = 0.4438, R_0.01 = 0.5614.