BMC Plant Biology

Table 2 Root scan characteristics

From: Transcriptomic and physiological insights into auxin-mediated root growth and potassium uptake in tobacco under low-potassium stress

Root index	K level	Treatment
Root index	K level	0	IAA	NPA
Length	N	906.96 ± 30.70a	851.03 ± 13.60b	533.53 ± 18.06c
Length	L	409.70 ± 35.78 d	513.07 ± 21.42c	292.64 ± 25.56e
Volume	N	1.19 ± 0.08a	1.37 ± 0.09a	0.43 ± 0.03 d
Volume	L	0.66 ± 0.02c	0.85 ± 0.02b	0.58 ± 0.02 cd
Surface area	N	122.66 ± 6.02a	112.34 ± 5.32b	105.74 ± 5.19c
Surface area	L	48.19 ± 2.74 d	50.19 ± 2.89 d	40.16 ± 2.29e
Projection area	N	37.49 ± 2.00a	35.64 ± 1.37b	33.17 ± 1.74c
Projection area	L	15.11 ± 1.46e	16.13 ± 0.57 d	13.74 ± 1.33f
Diameter	N	0.40 ± 0.03a	0.43 ± 0.02a	0.32 ± 0.03c
Diameter	L	0.39 ± 0.01a	0.33 ± 0.00c	0.38 ± 0.01b
Root tip number	N	1615 ± 27a	1506 ± 54b	1324 ± 20c
Root tip number	L	464 ± 22e	830 ± 70 d	440 ± 21e
Bifurcation number	N	5461 ± 163a	5631 ± 256a	2116 ± 63c
Bifurcation number	L	2543 ± 90b	1970 ± 60c	2002 ± 71c

N (5 mmol/L); L (0.15 mmol/L); different lowercase letters following the numbers in the same row indicate significant differences (P < 0.05)

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