Influence of Selenium on Growth, Physiology, and Antioxidant Responses in Maize Varies in a Dose-Dependent Manner

Figure 3

Principal component analysis of variables (parameters observed A) and observations (treatments applied B). PH: plant height, SFW; shoot fresh weight, SDW: shoot dry weight, RDW: root dry weight, RFW: root fresh weight, E: transpiration rate, A: photosynthetic rate, Gs: stomatal conductance, Chl.: chlorophyll (SPAD) contents, RWC: relative water contents, MSI: membrane stability index, Se-R: selenium in roots, Se-S: selenium in a shoot, SOD: sodium dismutase, CAT: catalase, POD: peroxidase, Zn-S: Zn in a shoot, Zn-R: Zn in roots, Fe-S: Fe in a shoot, Fe-R: Fe in roots. (a) Variable PCA. (b) Observation PCA.

(a)

(b)