. 2018 Jun 1;9:693. doi: 10.3389/fpls.2018.00693

Table 2.

Results of a two-way analysis of variance for the effect of genotype, growth light intensity, and the degree of genotype response to growth light intensity for parameters in Table 1 and scores of principal components 1 and 2 (see Figure 10).

Parameter	Genotype	Light	Genotype × Light
Minor vein density (mm mm^-2)	^∗∗∗	^∗∗	n.s.
Cells per minor vein	^∗∗∗	^∗∗∗	^∗
Cells per minor vein × vein density	n.s.	^∗∗∗	n.s.
Xylem cells per minor vein	^∗∗∗	^∗∗∗	^∗∗
Phloem cells per minor vein	^∗∗∗	^∗∗∗	n.s.
Ratio of xylem to phloem cells	^∗∗∗	^∗	n.s.
Tracheary elements per minor vein	^∗∗∗	^∗∗∗	^∗∗
Sieve elements per minor vein	^∗∗∗	^∗∗∗	^∗
CCs + PCs per minor vein	^∗∗∗	^∗∗∗	n.s.
Ratio of tracheary to sieve elements	^∗∗	n.s.	n.s.
Photosynthetic capacity (μmol O₂ m^-2 s^-1)	n.s.	^∗∗∗	n.s.
Phloem cells per minor vein × vein density	n.s.	^∗∗∗	n.s.
Sieve elements per minor vein × vein density	n.s.	^∗∗∗	n.s.
CCs + PCs per minor vein × vein density	n.s.	^∗∗∗	n.s.
Transpiration ratio (mol H₂O mol^-1 CO₂)	^∗∗∗	^∗∗∗	^∗
Xylem cells per minor vein × vein density	^∗∗	^∗∗∗	n.s.
Tracheary elements per minor vein × vein density	^∗∗∗	^∗∗∗	n.s.
Principal component 1	^∗∗∗	^∗∗∗	^∗∗∗
Principal component 2	^∗∗∗	^∗∗∗	^∗∗∗

The asterisks denote significant effects; ^∗P < 0.05, ^∗∗P < 0.01, ^∗∗∗P < 0.001, and n.s., not significant. CC, companion cells; PC, phloem parenchyma cells.