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Table 3 The coefficient of correlation for phytopigments, ascorbic acid, β-carotene, TP, TF, RQA (DPPH), and RQA (ABTS+) of four selected drought-tolerant vegetable amaranth

From: Nutraceuticals, phytochemicals, and radical quenching ability of selected drought-tolerant advance lines of vegetable amaranth

Traits Chl b (μg
g− 1 FW)
Chl ab (μg g− 1 FW) BC (ng g− 1 FW) BX (ng g− 1 FW) BL (ng g− 1 FW) β-Car (mg
100 g− 1 FW)
AA (mg 100 g− 1 FW) TP (μg g− 1 FW) TF (μg g− 1 DW) RQA (DPPH) (μg g− 1 DW) RQA (ABTS+) (μg g− 1 DW)
Chla (μg g− 1 FW) 0.88** 0.93** 0.96** 0.95** 0.88** −0.82** −0.015 0.88** 0.87** 0.88** 0.95**
Chlb (μg g−1 FW)   0.95** 0.87** 0.95** 0.89** −0.67 −0.018 0.81** 0.85** 0.92** 0.89**
Chlab (μg g−1 FW)    0.82** 0.96** 0.87** −0.85** −0.014 0.86** 0.88** 0.86** 0.93**
BC (ng g−1 FW)     0.97** 0.95** −0.86** − 0.116 0.85** 0.87** 0.89** 0.88**
BX (ng g−1 FW)      0.97** −0.85** −0.123 0.83** 0.81** 0.85** 0.92**
BL (ng g−1 FW)       −0.89** − 0.129 0.89** 0.86** 0.87** 0.89**
β-Car (mg 100 g−1 FW)        0.76* 0.89** 0.89** 0.92** 0.96**
AA (mg 100 g−1 FW)         0.86** 0.85** 0.87** 0.88**
TP (μg g−1 DW)          0.85** 0.88** 0.99**
TF (μg g−1 DW)           0.85** 0.89**
RQA (DPPH) (μg g−1 DW)            0.97**
  1. Chl a Chlorophyll a; Chl b Chlorophyll b; Chl ab Chlorophyll ab; BC Betacyanins; BX Betaxanthins; BL Betalains; β-Car Beta-carotene; AA Ascorbic acid; RQA (DPPH) Radical quenching ability (TE); RQA (ABTS+) Radical quenching ability (TE); TP Total polyphenols (GAE); TF Total flavonoids (RE); ** Significant at 1% level