Induction and Characterization of Tetraploids from Seeds of Bletilla striata (Thunb.) Reichb.f.

Table 1

Comparison of morphological characteristics between tetraploid (4x) and diploid (2x) B. striata plants.

Morphological characteristics	2x	4x
Leaf length (mm)	4.51 ± 0.340	5.15 ± 0.170
Leaf width (mm)	0.43 ± 0.040	0.69 ± 0.021
Leaf index	10.48 ± 0.780	7.47 ± 0.410
Tuber diameter (mm)	3.21 ± 1.060	6.55 ± 1.430
Length of guard cells (μm)	1.41 ± 0.408	2.11 ± 0.231
Width of guard cells (μm)	1.08 ± 0.427	1.87 ± 0.239
Stomata density (per unit area)	14.00 ± 4.90	5.00 ± 0.907

represents a significant difference between mean values at according to the two-sample -test.