Table 2. Correlation coefficients between traits of roots and aboveground parts in wheat under drought stress.

Indexes		Plant height	Dry weight of aboveground parts	Spike weight	1,000-grains weight	Relative area of amyloplast	Relative area of protein body
Root length	CC	−0.78∗	−0.33	0.37	−0.54	0.51	0.70∗
	DS	−0.14	−0.57	0.67	−0.45	0.79∗	0.78∗
Dry weight of roots	CC	0.85∗	0.99∗	0.48	0.58∗	0.41	−0.22
	DS	0.89∗	0.98∗	0.29	0.19	0.29	−0.03
Root-shoot ratio	CC	−0.43	−0.74∗	−0.61∗	0.27	−0.85∗	−0.58
	DS	−0.15	−0.39	−0.33	0.57	−0.86∗	−0.75∗

Notes.

Each correlation coefficient is calculated from six values. Asterisks in the upper right corner of the number indicate that the correlation coefficient is significant (p < 0.05).

CC

control condition

DS

drought stress.