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actinostele

Overview page. Subjects: Plant Sciences and Forestry.

A monostele type of protostele in which the cross-section of the xylem is star-shaped or lobed. Compare hypophloic haplostele, haplostele, and solenostele.

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amphicribral

Overview page. Subjects: Plant Sciences and Forestry.

Applied to a vascular bundle in which the phloem surrounds the xylem. Compare amphivasal.

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amphiphloic

Overview page. Subjects: Plant Sciences and Forestry.

A vascular bundle morphology in which the phloem occurs as concentric cylinders outside and inside the xylem.

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amphiphloic siphonostele

Overview page. Subjects: Plant Sciences and Forestry.

A monostele type of siphonostele which appears in cross-section as 1 ring of phloem around the outside of the xylem and another around the inside of the xylem ring, but outside the pith....

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amphivasal

Overview page. Subjects: Plant Sciences and Forestry.

Applied to a vascular bundle in which the xylem surrounds the phloem. Compare amphicribral.

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annual ring

Overview page.

Concentric circles visible in cross-sections of woody stems or trunks. Each year the cambium layer produces a layer of xylem, the vessels of which are large and thin-walled in the ...

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apoplast

Overview page. Subjects: Biological Sciences.

Areas of a plant that lie outside the plasmalemma, such as cell walls and dead tissues of the xylem. The apoplast may represent one of the main pathways of water movement through the plant.

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bicollateral bundle

Overview page. Subjects: Plant Sciences and Forestry.

A vascular bundle in which phloem lies on both sides of the xylem.

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bleeding

Overview page. Subjects: Plant Sciences and Forestry.

In plants, exudation of the contents of the xylem stream at a cut surface owing to root pressure.

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cambium

Overview page. Subjects: Biological Sciences.

A plant tissue consisting of actively dividing cells (see meristem) that is responsible for increasing the girth of the plant, i.e. it causes secondary growth. The two most important cambia...

See overview in Oxford Index