plant presentation info - a rhizome is a characteristically...

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a rhizome is a characteristically horizontal stem of a plant that is usually found underground, often sending out roots and shoots from its nodes . Rhizomes may also be referred to as creeping rootstalks or rootstocks . A stolon is similar to a rhizome, but, unlike a rhizome, which is the main stem of the plant, a stolon sprouts from an existing stem, has long internodes, and generates new shoots at the end, such as in the strawberry plant. In general, rhizomes have short internodes; they send out roots from the bottom of the nodes and new upward-growing shoots from the top of the nodes. It is a method of reproduction for plants. A stem tuber is a thickened part of a rhizome or stolon that has been enlarged for use as a storage organ . [3] In general, a tuber is high in starch , for example, the common potato , which is a modified stolon. The term tuber is often used imprecisely, and is sometimes applied to plants with rhizomes. Some plants have rhizomes that grow above ground or that lie at the soil surface, including some Iris species, and ferns , whose spreading stems are rhizomes. Plants with underground rhizomes include gingers , bamboo , the Venus Flytrap , Chinese lantern , Western poison-oak , [4] hops , and Alstroemeria , and the weeds Johnson grass , bermuda grass , and purple nut sedge . Rhizomes generally form a single layer, but in Giant Horsetails , can be multi-tiered [5] . A gametophyte is the haploid , multicellular phase of plants and algae that undergo alternation of generations , with each of its cells containing only a single set of chromosomes . The gametophyte produces male or female gametes (or both), by a process of cell division called mitosis . The fusion of male and female gametes produces a diploid zygote , which develops by repeated mitotic cell divisions into a multicellular sporophyte . Because the sporophyte is the product of the fusion of two haploid gametes , its cells are diploid , containing two sets of chromosomes. The mature sporophyte produces spores by a process called meiosis , sometimes referred to as " reduction division " because the chromosome pairs are separated once again to
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This note was uploaded on 10/23/2011 for the course BIOLOGY 10826265 taught by Professor Delcerro during the Spring '11 term at Thomas Jefferson School of Law.

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plant presentation info - a rhizome is a characteristically...

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