{"id":154,"date":"2021-12-09T20:12:41","date_gmt":"2021-12-09T19:12:41","guid":{"rendered":"https:\/\/michelecrevecoeur.ch\/?page_id=154"},"modified":"2022-03-12T17:54:34","modified_gmt":"2022-03-12T16:54:34","slug":"organs","status":"publish","type":"page","link":"https:\/\/michelecrevecoeur.ch\/?page_id=154","title":{"rendered":"Organs"},"content":{"rendered":"\t\t
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Morphology: vegetative organs & particular categories of plants.<\/span><\/strong><\/p>

\u00a0Numerous websites are devoted to plant organ’s morphology. You can find here some organ’s photographs linked to other pages on this website (anatomy, expertise, tissues):<\/p>

(1) Buds and leaves: example of chestnut tree.
(2) Roots: example of corn’s primary root with links to pages devoted to adventitious roots and to pneumatophore roots.<\/p>

Characteristics of plants adapted to particular environments are also illustrated.<\/p>

(1) Xerophytes : plants living in dry conditions
(2) Hydrophytes: plants living in wet conditions<\/p>

I. Vegetative organs<\/strong><\/span><\/p>

I.1. Buds<\/span><\/strong><\/p>

A bud can be vegetative, mainly made of very young leaves assembled around the vegetative point (meristem)<\/a>. It can also be floral and then contains primordia of flowers and\/or inflorescences.<\/p>

In numerous woody trees and shrubs species, the bud spends the winter period in a slowed down life state. They cease growth and enter in a dormant stage to survive to low winter temperatures. The buds are often protected (thermic and mechanical protection) by tough specialized leaves known as bud scales. These external scales are waterproof and covered with a sticky substance (waxy coat). Below them we can find thinner scales covered with hair. The whole system protects leaves, stems and\/or flowers.<\/p>

During spring the bud bursts and take back an active life. It begins to grow, with leaves beginning to emerge and a new axis (shoot) which is going to extend. Leaves are then going to deviate one from each other and acquire their definitive shape and length.<\/p>

Some photographs of\u00a0chestnut trees bud<\/strong>\u00a0are presented here below at different stages of their spring budburst. During budburst we can have a vegetative bud or a floral bud. Photographs taken at Chemin des Ch\u00eanes, Collonges Sous Sal\u00e8ve, France in April 2020.Cha<\/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

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The bud’s external surface (see on the right) is made of waterproof protective scales covered with a sticky substance (waxy coating). They ensure a mechanical and thermical protection.<\/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

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Bud in winter<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\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
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