Supplementary Light Source Affects Growth, Metabolism, and Physiology of Adenophora triphylla (Thunb.) A.DC. Seedlings

Table 3

Stomata characteristics in A. triphylla leaves after four weeks of cultivation under different supplementary light sources.

Treatment	SD (mm^−2)	GCL (μm)	GCW (μm)	PL (μm)	PW (μm)	GCA (μm^2)	PA (μm^2)	PAPLA (1000 μm^2·mm^−2)	Aperture
HPS	433.9 ± 21.2 b	11.9 ± 1.2 a	2.6 ± 0.6 a	15.5 ± 0.4 b	3.8 ± 0.2 a	71.5 ± 1.3 c	28.6 ± 8.7 a	12.8 ± 4.5 a	0.22 ± 0.03 ab
MH	121.1 ± 31.7 c	11.5 ± 3.2 a	2.9 ± 0.6 a	21.0 ± 0.3 a	4.1 ± 0.1 a	116.9 ± 8.9 a	29.8 ± 12.1 a	4.2 ± 2.0 b	0.26 ± 0.02 a
FR	98.8 ± 20.5 c	12.5 ± 1.0 a	2.3 ± 0.2 a	17.3 ± 1.5 b	3.7 ± 0.2 a	80.1 ± 4.6 bc	25.6 ± 2.0 a	2.6 ± 0.7 b	0.19 ± 0.03 ab
LED-w	414.2 ± 10.1 b	13.5 ± 0.2 a	3.4 ± 0.4 a	17.5 ± 0.3 b	4.0 ± 0.3 a	80.7 ± 4.1 bc	38.4 ± 5.9 a	15.8 ± 2.9 a	0.25 ± 0.03 a
LED-mix	664.1 ± 33.4 a	13.0 ± 1.1 a	1.9 ± 0.2 a	17.3 ± 0.5 b	4.0 ± 0.1 a	98.6 ± 3.5 ab	20.9 ± 2.2 a	13.8 ± 1.0 a	0.15 ± 0.03 b

SD: stomata density; GCL: guard cell length; GCW: guard cell width; PL: pore length; PW: pore width; GCA: guard cell area; PA: pore area; and PAPLA: pore area per leaf area (1000 μm²·mm⁻²). HPS: high pressure sodium; MH: metal halide; FR: far-red; LED-w: white (red: green: blue = 2:4:3) light-emitting diodes; and LED-mix: mixed (red: green: blue = 4:1:4) light-emitting diodes. Different letters (a, b, and c) indicate significant differences (p < 0.05) among treatments.