Table 2 Gray correlation coefficients between the active ingredients, antioxidant activity and related environmental factors.

From: Influence of Environmental Factors on the Active Substance Production and Antioxidant Activity in Potentilla fruticosa L. and Its Quality Assessment

Environmental factors

Correlation degree

Tannin

Total flavonoids

Rutin

Total phenolics

IC50

XN

0.313

0.456

0.501

0.444

0.478

XAAP

0.351

0.511

0.421

0.602

0.507

XALTI

0.717

0.758

0.661

0.724

0.776

XpH

0.471

0.376

0.357

0.376

0.444

XAAT

0.402

0.413

0.364

0.461

0.305

XAMT

0.357

0.301

0.462

0.598

0.287

XP

0.316

0.406

0.456

0.336

0.321

X7

0.579

0.432

0.477

0.458

0.429

X1

0.481

0.338

0.328

0.294

0.328

XASD

0.357

0.674

0.733

0.328

0.613

XTP

0.322

0.329

0.353

0.422

0.515

  1. XN, XP, ···, XALTI was performed in the Table 1. IC50 was used to indicate antioxidant activity.
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