{"id":2241,"date":"2022-02-06T15:05:20","date_gmt":"2022-02-06T14:05:20","guid":{"rendered":"https:\/\/michelecrevecoeur.ch\/?page_id=2241"},"modified":"2022-02-13T16:48:18","modified_gmt":"2022-02-13T15:48:18","slug":"floral-anatomy-2","status":"publish","type":"page","link":"https:\/\/michelecrevecoeur.ch\/?page_id=2241","title":{"rendered":"Floral Anatomy"},"content":{"rendered":"\t\t
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Sections in floral buds from different plants.<\/strong><\/span><\/p>

A reminder of the main morphological characteristics of flowers. The parts of flowers are arranged in whorls on the end of a stalk called a peduncle.
The two whorls of nonreproductive parts are sepals and petals that are modified leaves.
The outermost whorl of flower parts called sepals are known together as calyx. Then we have the petals, colorful modified leaves that attract pollinators that may be separate or fused in a tube. The whorl of petals is called corolla. The calyx and the corolla are known as the perianth.
After sepals we find the two reproductive parts of flowers: the stamens and the carpels.
The stamens are pollen \u2013 producing organs and consist of a filament terminated by an anther. This contains 4 pollen sacs arranged in pairs (one or more) producing the pollen grains.
After stamens we have carpels that lie inside the whorl of stamens. In most flowers the carpels are differentiated into 3 parts: (1) a lower round ovary where ovules lie; (2) the style through which the pollen tube will grow; (3) the stigma, terminal part to which pollen grains will adhere.
The entire carpels including the 3 parts is referred as pistil. The stamens are together known as the androecium and carpels, the female part of the flower bearing ovules are known collectively as the gynoecium.
<\/span><\/p>

Cross section at different levels of a floral bud perfectly complement macromorphological observations. They are useful for comparative study of phenotypes.<\/p>

Below a list of plants for which paraffin sections have been made in floral buds. There are 4 dicotyledons ans 2 monocotyledons.\u00a0<\/p>

Dicotyledones<\/strong><\/span>
.\u00a0Geranium robertianum<\/em><\/a><\/strong>
.\u00a0Jasminum odoratissimum\u00a0<\/em><\/a>\u00a0<\/strong>
.\u00a0Lathyrus silvestris\u00a0
<\/em>\u00a0<\/a>\u00a0
<\/strong>Monocotyledones \u00a0\u00a0<\/span>\u00a0
<\/strong>.\u00a0<\/span>Agapanthus africanus<\/a>
<\/em><\/strong>.\u00a0Galtonia viridiflora\u00a0\u00a0<\/em><\/a>\u00a0<\/strong>\u00a0\u00a0<\/span><\/p>

Sections in floral buds of’ A<\/em>rabidopsis<\/em> thaliana<\/em>\u00a0<\/strong><\/a>embedded in Epon have been realized at the level of anthers.<\/p>

Realization of sections and microphotographs<\/span><\/strong><\/p>

\u00a0– Floral bud of\u00a0Geranium robertianum –<\/em><\/strong>\u00a0paraffin sections.<\/span><\/span>
Sections and their staining : Anne Utz \u2013 Technician & Dario Cessa Apprentice
Photographs and annotations : Dr Mich\u00e8le Cr\u00e8vecoeur.<\/p>

– Floral buds of\u00a0Jasminum odoratissimum,\u00a0<\/em><\/span>Lathyrus silvestris,\u00a0Agapanthus africanus,<\/em>\u00a0Galtonia viridiflora –
<\/em><\/em><\/span><\/strong>Sections, staining of sections and photographs : Isabelle Chapalay –\u00a0 Research and teaching collaborator.
Annotations of photographs: Dr Mich\u00e8le Cr\u00e8vecoeur.<\/p>

Samples from the different plants have been collected in the Conservatory & Botanical Garden – Geneva and immediately fixed with FAA with collaboration of Dr Fred Stauffer – Curator<\/p>

– Floral buds of\u00a0Arabidopsis thaliana<\/strong><\/em><\/span>
<\/i><\/b><\/span>Fixation, embedding in Epon, sections and photographs : Dr Mich\u00e8le Cr\u00e8vecoeur.
<\/span>Samples were collected from plants cultured in the greenhouse from Department of Botany and Plant Biology- Geneva University.<\/span><\/p>

See also the microphotographs of\u00a0flowers and floral parts of\u00a0Arabidopsis th.<\/em><\/a>\u00a0observed with a scanning electron microscope.<\/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":"

Sections in floral buds from different plants. A reminder of the main morphological characteristics of flowers. The parts of flowers are arranged in whorls on the end of a stalk called a peduncle.The two whorls of nonreproductive parts are sepals and petals that are modified leaves.The outermost whorl of flower parts called sepals are known […]<\/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-2241","page","type-page","status-publish","hentry"],"yoast_head":"\nFloral Anatomy - 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