Dinsdag - Raven

7 important questions on Dinsdag - Raven

What are the reserves in beets and such used for during the second year?

The production of flowers, fruits and seeds.

What is a taproot system?

A strongly developed taproot with lateral roots.

What is the root:shoot ratio?

Balance between the fine roots and the leaf area. Decreases as the plant ages.
If roots reduce, shoots reduce. (lack of water+mineralst, root hormones)
If shoots reduce, roots reduce. (lack of carbohydrates and shoot hormones)
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What are border cells and what function do they have?

Rootcap cells are programmed to separate from the rootcap and from each other as they reach the rootcap periphery.
  • koolstof opslaan
  • protection of apical meristem from infection
  • maintenance of intimate root-soil contact
  • mobilization of essential elements for uptake by the roots
  • short-term protection from drying out (desiccation)
  • specific attraction or repulsion of bacteria
  • wortel begeleiden door grond

What is the region of elongation?

Cellen strekken hier, waardoor de wortel in de lengte groeit. Hier geen wortelharen aanwezig.

Why is the pericycle considered a part of the vascular cylinder?

Like the vascular tissues, it originates from the procambium.

What is secondary growth in roots and stems?

  1. The formation of (1) secondary vascular tissues, that is, secondary xylem and secondary phloem, from a vascular cambium
  2. The formation of periderm, composed mostly of cork tissue, from a cork cambium.

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