{"id":1444,"date":"2022-01-23T14:45:21","date_gmt":"2022-01-23T13:45:21","guid":{"rendered":"https:\/\/michelecrevecoeur.ch\/?page_id=1444"},"modified":"2022-01-23T14:46:04","modified_gmt":"2022-01-23T13:46:04","slug":"artemisia-stem","status":"publish","type":"page","link":"https:\/\/michelecrevecoeur.ch\/?page_id=1444","title":{"rendered":"Artemisia Stem"},"content":{"rendered":"\t\t
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Microphotographs of a cross section through a stem of\u00a0Artemisia dranunculus
<\/em><\/span><\/strong><\/p>

Tarragon, also called dragon grass, tarragon absinthe or serpentine, is a perennial, condiment herbaceous plant native to Asia. The samples of stem used for sectioning, have been harvested at the Conservatory and Botanical Garden of the city of Geneva.
The paraffin sections (8 \u03bcm thick) were stained with astra blue \u2013 basic fuchsin (see protocols<\/a>).
The first micrograph shows a cross section with the extensive central pith and the cortex consisting in a few rows of parenchyma cells below the epidermis. Ten vascular bundles (fcv) are disposed on a single ring at the periphery of the pith and secretory ducts (red arrows) are observed in the cortex.<\/div>

\"Tige<\/p>

Below, part of the section illustrating the angular collenchyma in different areas of the cortex. It consists of several layers of cells with thick walls between epidermis (ep) and a vascular bundle. cu: cuticle; ep: epidermis; x: xylem; s: secretory duct<\/span><\/p>

\"Tige<\/p>

\u00a0Portion of the cross section showing two secretory ducts (ps) in the cortical parenchyma (par)<\/p>

\"Poche<\/p>

Characteristics of this section<\/strong>\u00a0corresponding to a dicotyledon stem: large pith and reduced cortex, vascular bundles on a single ring with superposition of xylem and phloem, xylem towards inside and phloem towards the periphery.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Microphotographs of a cross section through a stem of\u00a0Artemisia dranunculus Tarragon, also called dragon grass, tarragon absinthe or serpentine, is a perennial, condiment herbaceous plant native to Asia. The samples of stem used for sectioning, have been harvested at the Conservatory and Botanical Garden of the city of Geneva.The paraffin sections (8 \u03bcm thick) were […]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-1444","page","type-page","status-publish","hentry"],"yoast_head":"\nArtemisia Stem - 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