Table 3.

Correlations among the biomass, total Se content, photosynthetic pigment content, antioxidant enzyme activity, soluble protein content, and Se metabolism-related enzyme activity.

Indicator	Root biomass	Shoot biomass	Root total Se content	Shoot total Se content	Chlorophyll a content	Chlorophyll b content	Chlorophyll a/b	Carotenoid content	SOD activity	POD activity	CAT activity	Soluble protein content	ATPS activity	APR activity	SAT activity	SMT activity
Root biomass
Shoot biomass	0.954**
Root total Se content	0.953**	0.929**
Shoot total Se content	0.923**	0.911**	0.992**
Chlorophyll a content	0.592*	0.759**	0.650**	0.697**
Chlorophyll b content	0.905**	0.966**	0.899**	0.883**	0.744**
Chlorophyll a/b	-0.908**	-0.906**	-0.879**	-0.839**	-0.515*	-0.955**
Carotenoid content	0.725**	0.812**	0.854**	0.891**	0.868**	0.838**	-0.707**
SOD activity	0.898**	0.902**	0.805**	0.744**	0.468	0.848**	-0.874**	0.530*
POD activity	0.969**	0.928**	0.917**	0.873**	0.491	0.858**	-0.887**	0.624*	0.952**
CAT activity	0.844**	0.859**	0.942**	0.964**	0.750**	0.840**	-0.764**	0.913**	0.617*	0.777**
Soluble protein content	0.819**	0.864**	0.898**	0.927**	0.847**	0.838**	-0.711**	0.898**	0.616*	0.739**	0.958**
ATPS activity	0.783**	0.832**	0.905**	0.947**	0.816**	0.826**	-0.714**	0.954**	0.585*	0.708**	0.936**	0.939**
APR activity	0.839**	0.901**	0.900**	0.919**	0.850**	0.881**	-0.765**	0.929**	0.706**	0.757**	0.870**	0.907**	0.938**
SAT activity	0.878**	0.872**	0.945**	0.942**	0.642**	0.883**	-0.863**	0.877**	0.757**	0.821**	0.848**	0.814**	0.903**	0.933**
SMT activity	0.949**	0.923**	0.947**	0.913**	0.565*	0.908**	-0.921**	0.761**	0.906**	0.936**	0.799**	0.768**	0.800**	0.861**	0.949**

N = 15. **: Correlation is significant at the 0.01 level (2-tailed test). *: Correlation is significant at the 0.05 level (2-tailed test).