Table 4.

Correlations of polyamines in young spikelets and yield components.

Correlation (r)	Spikelets number	Sterile spikelets	Fully filled grains	1000-grain weight
Put	−0.471	0.921**	−0.863**	−0.3
Spd	0.357	−0.931**	0.942**	0.891**
Spm	0.416	−0.914**	0.924**	0.851**

The two asterisks followed number in table are significantly different at P < 0.01 between the items of row and column. Resource data is from Table 2 (Spikelets number, Sterile spikelets, Fully filled grains, 1000-grain weight) and Table 3 (Put, Spd, Spm). All the data points from four treatments have three replicates.