Table 3 Gene ID, functional annotation, description and function of the eight transcription factors analyzed by dPCR

VIT_19s0027g01120

Lateral organ boundaries protein 4 (LBD4)

LOB family protein

Cell proliferation in the cambium. Activation of phloem differentiation.

Yordanov et al. [28];

Guerriero et al. [29].

VIT_18s0001g10160

Wuschel homeobox 4 (WOX4)

Homeobox transcription factor

Stem cell maintenance in cambium and differentiation and/or maintenance of the vascular cambium.

Hirakawa et al. [30];

Suer et al. [31];

Guerriero et al. [29].

VIT_18s0001g06430

Homeobox-leucine zipper protein ATHB-6 (ATHB6)

b-ZIP transcriptional factor

Negative regulator of Abscisic acid signaling (ABA) pathway. Cell division and/or differentiation in developing organs.

Sӧderman et al. [27].

VIT_06s0004g03130

Auxin response factor 4 (ARF4)

Auxin response factor

Auxin signaling. Organ polarity, vascular development and organ asymmetry establishment.

Pekker et al. [32];

Hunter et al. [33].

VIT_07s0141g00290

Auxin-responsive protein IAA16-like (IAA16)

Aux/IAA family

Auxin signaling. Repressor of ARF response. Plant growth.

Korasick et al. [34];

Rinaldi et al. [35].

VIT_18s0001g02540

Response regulator ARR9

Type A ARRs

Negative regulation of cytokinin signaling. Callus and lateral root formation.

Perianez-Rodriguez et al. [36].

VIT_04s0008g06000

Ethylene-responsive transcription factor ERF3

Ethylene response factor

AP2/ERF

Ethylene signaling. Cell division in developing vascular tissue. Xylem development.

Etchells et al. [37]

Vahala et al. [38]

VIT_16s0013g00890

Ethylene-responsive element binding factor - ERF1

Ethylene response factor

Ethylene signalling. Cell division in developing vascular tissue.

Etchells et al. [37]