Table 1.

Anatomical features of the different root types in pearl millet.

Root type	Root diameter (μm)	Stele diameter (μm)	# Metaxylem vessels	Metaxylem vessel diameter (μm)	n
Primary root	429 ± 103ab	181 ± 34b	1	58 ± 11a	10
Crown root	517 ± 76a	229 ± 54a	3	56 ± 9a	8
LR type 1	112 ± 27d	32 ± 8e	0	NA	14
LR type 2	264 ± 22c	74 ± 9d	1	16 ± 2b	7
LR type 3	367 ± 66b	145 ± 16c	1	50 ± 6a	12

Mean and standard deviation of all sections. Letters correspond to groups formed by Tukey’s Honest Significant Difference test (alpha = 0.05). n, sample size.