Table 1 A schedule for capitulum morphogenesis and development stages of C. vestitum
Stage no. | Stage name | Landmarks of morphological |
|---|---|---|
Stage 1 | Vegetative period | SAM keeps the conical shape and is wrapped tightly by young leaves |
Stage 2 | Apical meristem enlargement stage | Apical meristem grows and expands, showing hemispherical shape and developing into IM |
Stage 3 | Bract formation stage | Bract primordia start to from at the basal part of IM |
Stage 4 | Disc floret primordia formation early stage | Disc floret primordia showing as small spherical protrusions initiate at the lower part of IM |
Stage 5 | Ray floret primordia formation early stage | Ray floret primordia showing as approximate elliptical protrusions initiate between the bract and the outermost disc floret primordia |
Stage 6 | Floret primordia formation middle stage | Disc floret primordia continue to generate in centripetal differentiated pattern |
Stage 7 | Floret primordia formation end stage | Floret primordia cover the entire dome of capitulum |
Stage 8 | Petal formation early stage | The petal primordia of florets begin to form |
Stage 9 | Petal formation middle stage | Disc floret petals have basically formed, and ray floret petals continue to develop |
Stage 10 | Petal formation end stage | Disc floret petals are mature and ray floret petals continue to elongate |