Table 2 Root architecture parameters of grafted watermelon seedlings analyzed with WinRHIZO root-scanning system after three or six days in the healing chamber under three or nine light treatments, respectively.

From: Blue light promotes vascular reconnection, while red light boosts the physiological response and quality of grafted watermelon seedlings

Light treatments

Length (cm)

Surface area (cm2)

Volume (cm3)

Tip No

Days 1–3 after grafting

R

28.7 ± 5.7 b

8.0 ± 1.4 b

0.20 ± 0.03 b

155.4 ± 25.5 a

B

48.9 ± 8.0 a

13.7 ± 1.8 a

0.31 ± 0.03 a

256.5 ± 81.0 a

12B

23.5 ± 3.1 b

8.1 ± 0.1 b

0.22 ± 0.02 ab

82.7 ± 9.3 a

Days 4–6 after grafting

R-R

156.9 ± 23.4 ab

26.2 ± 3.7 abc

0.35 ± 0.04 ab

1376.0 ± 298.8 a

R-B

102.1 ± 5.4 b

17.3 ± 0.7 c

0.24 ± 0.03 b

774.3 ± 164.4 a

R-12B

155.3 ± 10.6 ab

26.8 ± 1.1 abc

0.37 ± 0.03 ab

1296.3 ± 246.0 a

B-R

209.7 ± 33.5 a

30.5 ± 2.9 ab

0.36 ± 0.02 ab

1618.4 ± 480.4 a

B-B

148.2 ± 26.0 ab

22.3 ± 3.4 bc

0.27 ± 0.04 ab

1025.3 ± 186.0 a

B-12B

209.3 ± 21.8 a

31.9 ± 2.3 ab

0.39 ± 0.02 ab

1754.0 ± 313.0 a

12B-R

230.2 ± 20.6 a

35.6 ± 4.3 a

0.44 ± 0.07 a

1734.3 ± 104.2 a

12B-B

155.8 ± 8.5 ab

24.1 ± 2.1 abc

0.30 ± 0.04 ab

1401.8 ± 131.1 a

12B-12B

188.0 ± 10.6 ab

31.3 ± 1.4 ab

0.42 ± 0.02 a

1675.0 ± 212.6 a

  1. Mean values (± SE) within a column followed by different letters indicate significant differences (a < 0.05). Mean values derived from n = 6 scanned roots.
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