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Tracheids

(noun) Plural form of tracheid.

See tracheid for definition and additional information.


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Transport In Plants

... dead complex permanent tissue. Sapwood is xylem and mostly alive It is the principal water conducting tissue of vascular plants. Xylem consists of tracheids , vessels , xylem parenchyma and xylem fibres. Also ray parenchyma Also the xylem of softwoods (Gymnospermae) do NOT contain vessels. Phloem: ...

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by kika
Tue Aug 02, 2011 10:40 am
 
Forum: Botany Discussion
Topic: Transport In Plants
Replies: 3
Views: 9518

Re: water movement in xylem

... the plant. It does the same thing with sugar. Water enters the plant's sieve-tubes and transports the sugar throughout the plant body . The tracheids, vessel elements, and sieve-cells are all lines with pits and have perforations and open discs for transport. Xylem does have lignified cell ...

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by Ariamezzo
Sat Feb 26, 2011 11:46 am
 
Forum: Botany Discussion
Topic: water movement in xylem
Replies: 2
Views: 6313

water movement in xylem

... in from the xylem by osmosis? By what means can water cross the lignified boundaries of the xylem wall to come into the phloem then? 2. What are tracheids in xylem? Is it true that they are like vessel elements because they also connect to one another to form the xylem vessel; tracheids however ...

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by ribosome911
Tue Jan 25, 2011 7:32 am
 
Forum: Botany Discussion
Topic: water movement in xylem
Replies: 2
Views: 6313

Secondary walls in tracheary elements

... present on primary xylem and there is a different kind of deposition pattern in secondary xylem? Or are they also found in secondary xylem? Do tracheids or vessel elements favour one of these types of thickenings? 2. When the secondary wall is laid down in areas other than where plasmodesmata ...

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by botanygirl
Mon Nov 10, 2008 7:50 pm
 
Forum: Botany Discussion
Topic: Secondary walls in tracheary elements
Replies: 0
Views: 2525

water transport in plants.

... be so kind as to explain which of the following two sentences is false. 1. weak bonding between water molecules and the walls of xylem vessels or tracheids helps support the columns of water in the xylem 2. Gymnosperms can sometimes develop especially high root pressure, which may account for ...

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by NewtoBiology
Sat Sep 13, 2008 1:12 am
 
Forum: Botany Discussion
Topic: water transport in plants.
Replies: 3
Views: 5072
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