Root and Root Hair Growth in Relation to Supply and Internal Mobility of Calcium

Tanaka, Yasuomi; Woods, Frank W.

doi:10.1086/336609

Cited by 17 publications

(8 citation statements)

References 15 publications

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“…It is possible that Al interfered with this important function of Ca, even at the low Za.,,,,""" used, through increased rigidity of the pectic layer (Klimashevskii & Dedov, 1980), which is present on epidermal cell walls and those of root hairs (Clarkson, 1991). Tanaka & Woods (1972) found that the requirements of oat {Hordeum vulgare L.) root hairs for Ca were small, and could not be substituted for , 1 mm). Note the prolific root hair growth on both the taproot and the lateral roots.…”

Section: Discussionmentioning

confidence: 99%

Calcium amelioration of aluminium toxicity effects on root hair development in soybean [Glycine max (L.) Merr.]

et al. 1993

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SUMMARYLow activities of the monomeric aluminium (Al) species, AP+, AKOH)^" and A1(OH)2+ in solution reduce root growth and root hair development in soybean [Glycine max (L.) Merr.]. Calcium (Ca) ameliorates to a certain extent the toxic effects of Al on root growth, but the interactive effects of Ca and Al on root hair development are not known. In the absence of added Al in solution culture, Ca concentration over the range 500-2000 //M had little effect on root growth or root hair development of soybean cv. Fitzroy. Where the sum of the activities of the monomeric Al species was 2 //M, taproot elongation and lateral root development of soybean was suppressed in solution with 500 //M Ca. The length of the root hair zone was only 10% of that in plants not exposed to Al, and scanning electron microscopy revealed a low density of root hairs. Increasing the Ca concentration to 2000 fiM largely overcame these deleterious effects. The results are discussed in relation to the role of root hairs as infection sites for Bradyrhizobium, and the known effects of Al in suppressing nodulation in soybean.

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Section: Discussionmentioning

confidence: 99%

Calcium amelioration of aluminium toxicity effects on root hair development in soybean [Glycine max (L.) Merr.]

et al. 1993

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“…Circumstantial supportive evidence is based on demonstration of the production of plant hormones by Rhizobium (see Mascarenhas and Canary 1985) The production of IAA (Badenoch- Jones et al 1982;Wang et al 1982;Wheeler et al 1984;Ernstsen et al 1987;Atzorn et al 1988), gibberellins (Katznelson andCole 1965;Atzorn et al 1988) and GA-like substances (Williams and Sicardi de Mallorca 1982), and cytokinins (Phillips and Torrey 1970;1972) have been reported. Circumstantial supportive evidence is based on demonstration of the production of plant hormones by Rhizobium (see Mascarenhas and Canary 1985) The production of IAA (Badenoch- Jones et al 1982;Wang et al 1982;Wheeler et al 1984;Ernstsen et al 1987;Atzorn et al 1988), gibberellins (Katznelson andCole 1965;Atzorn et al 1988) and GA-like substances (Williams and Sicardi de Mallorca 1982), and cytokinins (Phillips and Torrey 1970;1972) have been reported.…”

Section: Plant Hormones As External Signalsmentioning

confidence: 99%

“…While calcium generally inhibits the growth of plant cells (see Hepler and Wayne 1985), it is an important element for the elongation of root hairs (Tanaka and Woods 1972;Ewens and Leigh 1985; also see . It has been demonstrated that tip-growing cells like pollen tubes and root hairs require a continuous influx of Ca 2 + at the growing tip and an internal Ca 2 + gradient with higher levels at the tip for their continued elongation (Reiss and Herth 1979; Clarkson et al 1988;Schiefelbein et al 1992;de Ruijter et a1.…”

Section: Auxins/ethylenementioning

confidence: 99%

“…At this time there was debate as to the presence of calcium in root hair cell walls; this was resolved by autoradiographic evidence (Cormack et al 1963;Tanaka and Woods 1972). At this time there was debate as to the presence of calcium in root hair cell walls; this was resolved by autoradiographic evidence (Cormack et al 1963;Tanaka and Woods 1972).…”

Section: Calciummentioning

confidence: 99%

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Root Hairs

2000

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Cover photo credit:Scanning images showing frozen hydrated root hairs on a primary root of Vicia sativa spp. nigra (front cover image, courtesy of Norbert de Ruijter and Adriaan van Ae\st, Wageningen University) and Arabidopsis thaliana Columbia (back cover image, courtesy of John Esseling and Adriaan van Aelst, Wageningen University). The roots were grown in air, frozen in liquid nitrogen, freeze-dried for 2 min at -90·C, 10 nm Pt sputtercoated, and observed in a CfYO field-emission scanning electron microscope at 5 kV at -180·C.

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“…In roots grown in different nutrient solutions, the length of the hairs depends among other factors on the pH and the concentrations of Ca 2 + and nitrate (Cormack, 1949;Ewens and Leigh, 1985). When roots are grown in solutions without added calcium, their growth is severely inhibited (Pilet and Belhanafi, 1961;Tanaka and Woods, 1972;Ferguson and Bollard, 1976;Burstrom, 1981;Ewens and Leigh, 1985) and the density and length of root hairs are reduced (Cormack, 1949;Burstrom, 1952;Tanaka and Woods, 1972;Ewens and Leigh, 1985). Nevertheless, Ekdahl (1953) reported that the concentration of exogenous calcium was not a determining factor; in moist air, without an external supply of calcium, root hairs developed very well.…”

Section: Introductionmentioning

confidence: 99%

Calcium and Rhizodermal Differentiation in Primary Maize Roots

Jaunin

Hofer

1988

J Exp Bot

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Jaunin, F. and Hofer, R. M. 1988. Calcium and rhizodermal differentiation in primary maize roots.-J. exp. BoL 39: 587-593.Rhizodermal differentiation of maize (Zea mays L. cv. LG 11) roots cultured in humid air was influenced by a pretreatment for 2 h in CaCl 2 or CaSO* solutions. This increased the number of hair-producing roots and the density of hairs. Ethylene glycol-bis-{/?-aminoethyl ether)/VJV'-tetraacetic acid (EGTA) was inhibitory. Root hairs emerged in the part of the cell nearer to the tip. Trichoblasts were shorter and elongated more slowly than atrichoblasts. The elongation of the lower part of the trichoblast was less than that of the upper part.

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Root and Root Hair Growth in Relation to Supply and Internal Mobility of Calcium

Cited by 17 publications

References 15 publications

Calcium amelioration of aluminium toxicity effects on root hair development in soybean [Glycine max (L.) Merr.]

Calcium amelioration of aluminium toxicity effects on root hair development in soybean [Glycine max (L.) Merr.]

Root Hairs

Calcium and Rhizodermal Differentiation in Primary Maize Roots

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