Titlebook: Root Hairs; Cell and Molecular B Robert William Ridge,Anne Mie C. Emons Book 2000 Springer-Verlag Tokyo 2000 biology.cell.cell biology.cell

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Evidence for the Uptake of Non-Essential Ions and Essential Nutrient Ions by Root Hairs and Their E96). There has been considerable debate as to the role of root hairs in nutrient uptake and observations of the normal growth of shoots of two of three root hair mutant lines of . L. (maize) suggest that they may not always play a significant role (Wen and Schnable 1994). Root hairs when present, ho

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Genetics of Root Hair Development,whether an epidermal cell will be a hair cell (trichoblast) or a non-hair cell (atrichoblast) (although in some species every epidermal cell is a hair cell) and the site of root hair initiation is selected. The cell wall loosens at this initiation site to form a bulge. Root hair elongation then proc

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Nod-Factors in Symbiotic Development of Root Hairs,s volume). Young, elongating root hairs are extensively colonized by soil-borne micro-organisms. Intimate associations between dissimilar organisms are common, especially in nutrient poor environments. Prevalent amongst these associations are nitrogen-fixing symbioses in which photosynthetic organis

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,-Induced Plant Gene Expression in Root Hairs,e anchorage into the soil. In addition, the young emerging root hairs are the first cells of legumes with which symbiotic soil bacteria of several genera, collectively called rhizobia, interact (Bhuvaneswari et al. 1980; Broughton and Perret 1999; Turgeon and Bauer 1985). This interaction leads to r

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The Involvement of Root Hairs in Mycorrhizal Associations,ry of the bacteria into the plant root. A number of legumes are invaded by the so-called “crack entry” mode of penetration (Sprent 1989) whereby rhizobia enter the root either between epidermal cells or through breaks made through the root cortex by elongating lateral roots. In root hair entry, rhiz

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The Role of Microtubules in Root Hair Growth and Cellulose Microfibril Deposition,Baskin et al. 1994). Stabilization of CMT by taxol also leads to more isotropic growth (Baskin et al. 1994). Furthermore, growth regulators affect the orientation of the CMT (e.g., van Spronsen et al. 1995). Most researchers agree that the orientation of the CMT determines the direction of cell expansion.

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Root Hair-, Interactions in Actinorhizal Symbioses,emperate. Only some hosts of the families Casuarinaceae and Myricaceae are tropical. Actinorhizal plants possess great economic value as timber and fuel wood. They are also used extensively in land reclamation and as ornamental shrubs. Ecologically, actinorhizal plants are pioneer invaders of nitrogen poor sites (Baker and Schwintzer 1990).