12 Secondary Growth II

12 Secondary Growth II - Lecture: 12 BioSci 1C Apr.18.07 ?...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lecture: 12 BioSci 1C Apr.18.07 ? Secondary Growth The oldest living tree which grow near timber line in the white mountain of California. One tree has reached 4900 years of age. Pinus longaeva Formation of Secondary Xylem and Phloem Dividing residual procambium between bundles called interfascicular cambium Fascicular cambium + interfascicular cambium = vascular cambium Stem cross section after primary growth Stem cross section beginning of secondary growth Fascicular cambium: (Fasciculus from Latin Bundle) Fig. 5-9, p. 76 residual procambium parenchyma primary xylem primary phloem Cells begin dividing Vascular cambium forms Secondary xylem and phloem form secondary xylem secondary phloem vascular cambium secondary xylem secondary phloem vascular bundle residual procambium vascular bundle primary xylem parenchyma primary phloem interfascicular cambium fascicular cambium vascular cambium secondary phloem secondary xylem secondary xylem secondary phloem vascular cambium Fig. 5-10a, p. 77 interfascicular cambium fascicular cambium primary phloem primary xylem epidermis Secondary Growth Fusiform initials: make up Axial System of the vascular tissue Ray initials: divide to form Vascular Ray or Radial Systems ( which lays right angle to fusiform initials derivatives). which lays right angle to fusiform initials derivatives)....
View Full Document

Page1 / 33

12 Secondary Growth II - Lecture: 12 BioSci 1C Apr.18.07 ?...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online