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Table 3 Betanin (Bn) and vulgaxanthin (Vx) contents, betanin to vulgaxanthin ratio (Bn:Bx), total phenolic content (TPC) and yield data in roots of ethephon-treated beetroot plants in trials harvested at a single time-point (16 weeks after sowing)

From: Preharvest application of ethephon and postharvest UV-B radiation improve quality traits of beetroot (Beta vulgaris L. ssp. vulgaris) as source of colourant

Trial sowing date

Cultivar

Ethephon (g ha− 1)

Betalains (mg kg− 1 FW)

TPC

TSS

DM

 

Bn

Vx

Bn:Vx

16/06/15

‘Monty Rz’

0

1872 ± 105b

432 ± 32a

4.38

1385 ± 43b

16.13 ± 0.06a

12.37 ± 0.07a

 

360

2166 ± 72a

386 ± 57a

5.79

1643 ± 43a

14.25 ± 0.17b

11.63 ± 0.23a

‘Belushi Rz’

0

1240 ± 49b

339 ± 22a

3.67

960 ± 33b

15.41 ± 0.17a

11.34 ± 0.38a

 

360

1575 ± 57 a

274 ± 26a

5.82

1243 ± 25a

13.86 ± 0.06b

10.58 ± 0.10a

22/06/15

‘Monty Rz’

0

1972 ± 83b

405 ± 43a

4.94

1588 ± 32b

18.07 ± 0.01a

13.97 ± 0.20a

 

360

2458 ± 33a

364 ± 37a

6.88

1980 ± 11a

16.41 ± 0.19b

13.07 ± 0.42a

‘Belushi Rz’

0

1418 ± 50b

276 ± 27a

5.28

1159 ± 35b

17.57 ± 0.10a

13.07 ± 0.40a

 

360

1584 ± 24a

247 ± 21a

6.42

1349 ± 65a

17.07 ± 0.15b

12.14 ± 0.13a

  1. TSS total soluble solids content, DM dry matter. Data represent the mean ± SE, n = 3. Different letters indicate statistical significance according to Tukey’s test (p ≤ 0.05);