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. 2021 Mar 5;12:567782. doi: 10.3389/fpls.2021.567782

TABLE 6.

Morphological and physiological traits as predictors of seedling shoot and root biomass in response to salt-alkaline stress determined by a linear stepwise multiple regression analysis.

Morphological and physiological traits Standardized coefficients Shoot biomass Morphological and physiological traits Standardized coefficients Root biomass
Plant height ns Root length ns
Leaf area 0.438 3.6*** Root surface area 0.487 4.2***
Leaf dry weight ns Root average diameter ns
Photosynthetic rate 0.446 3.8*** Root tip number 0.409 3.5**
MS regression 25120.5 MS regression 3759.7
MS residual 264.1 MS residual 35.2
R2 0.718*** R2 0.741***

F-values and significance levels are shown for traits with a significant effect. Mean squares for the final regression equations (containing the “significant variables” with standardized coefficients), and proportion of variance explained by the model (R2) are indicated for both biomasses. ns, not significant. **p < 0.01, ***p < 0.001.