Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by CAMPBELL, R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by CAMPBELL, R.
Agricola
Right arrow Articles by CAMPBELL, R.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Annals of Botany 36: 711-720, 1972
© 1972 Annals of Botany Company

RESEARCH-ARTICLE

Electron Microscopy of the Development of Needles of Pinus nigra var. maritima

R. CAMPBELL

Department of Botany, The University Bristol, BS8 IUG

Received: 10 January 1972   

Pine needles were sampled at intervals throughout their first growing season and fixed for electron microscopy with potassium permanganate, glutaraldehyde/acrolein, and glutaraldehyde/formaldehyde. Mesophyll cells had electron-opaque tannin deposits and invaginated walls. Resin-canal cells contained characteristic plastids sheathed in endoplasmic reticulum; resin production was limited to the young needles. No distinct Casparian strip was visible in the endodermis. By varying degrees of wall thickening and vacuolation meristematic transfusion tissue developed into tracheids, parenchyma, or albuminous cells. The xylem had the usual structure but the phloem sieve cells had very thick fibrous walls. The cambium was inactive outside the fascicular sheath.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer:
Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.