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Fig. 1 | BMC Plant Biology

Fig. 1

From: Auxin regulates adventitious root formation in tomato cuttings

Fig. 1

Developmental phases of adventitious root formation in 4-week-old tomato cuttings. Transverse tomato stem cuttings were sectioned to visualize the phases of AR formation. a AR formation originated from the stem pericycle cells (arrow) adjacent the endodermis and the vasculature. b-l Different morphological development phases during tomato AR formation showing the origin of AR. b A few cells organized into a cluster. Arrow points to a disordered cell cluster. c Expanded cell cluster. d-g Different AR development phases showing the AR initiation process through the beginning of new vasculature formation. Arrow in (g) points to AR vascular tissue formation. h Newly formed AR vasculature connecting to the stem vasculature.. (I-J) AR extension to emergence. Arrow points to an extending AR primordium. k, l Mature AR emerges from the stem. AR are outlined in yellow all images Bars=100 μm

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