Roots213-page11

Roots213-page11 - own, or prefer to obtain water and...

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Roots - 11 Propagation Roots It is not uncommon for some plants to be able to produce adventitious shoots (or suckers) from roots. The common thistle can do this, as can false dandelions, found in our yards. Many trees can produce "suckers" from roots. Suckers are adventitious woody shoots Aspen clones, in which many trees are formed from one original, can cover several acres, and grow from root suckers. Trees in the rose family also produce suckers. Contractile Roots Contractile roots are roots that help to pull stem tissue into the soil to provide additional support and anchoring of the plant, and provide more stable temperature conditions in the soil for the dormant period. These are common on bulb and corm plants. Parasitic Roots Some plants choose to parasitize others rather than to photosynthesize on their
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Unformatted text preview: own, or prefer to obtain water and nutrients from some other plant than from the soil. Root-like structures called haustoria penetrate other plant tissues to obtain needed materials. Root Nodules Some legumes, and a few other plants, produce root nodules, which contain bacteria or cyanobacteria that can "fix" nitrogen (make nitrogen into a form that is useful as a plant nutrient). When the bacteria enter the root, they induce the root to form "tumors" which are the nodules. The bacteria then grow and produce the nitrogen products in the nodules. You can pull up clover and other herbaceous legumes and examine the conspicuous nodules on their roots....
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