Table 1 Regression between ionic contents (Na+ and K+) in shoot and root of guava plant (Psidium Guajava L.), and stress tolerance against salinity and water stress treatments.

From: Interactive salinity and water stress severely reduced the growth, stress tolerance, and physiological responses of guava (Psidium Guajava L.)

Parameters

Regression

Coefficient of correlation (R)

Adjusted regression coefficient (Adj.R2)

Significance

Na+ in shoot vs. Stress tolerance

y = −22.6x + 103.6

0.849

0.704

****

Na+ in root vs. Stress tolerance

y = −179x + 118.7

0.980

0.959

****

K+ in shoot vs. Stress tolerance

y = 68.5x−29.06

0.974

0.945

****

K+ in root vs. Stress tolerance

y = 320x−31.98

0.946

0.889

****

  1. Na+ and K+ denote sodium and potassium, respectively. Results are significant at p ≤ 0.0001 represented by ****. Regression is based on a first-order kinetics equation (y = bx + a) where “a” is the intercept, and “b” is the slope.
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