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Web URL(s): | http://www.jstor.org/stable/2433315?seq=1#page_scan_tab_contents Last checked: 12/17/2015 Access conditions: Item is within a limited-access website |
Publication Type:
| Refereed |
Author(s): | Powell, M. J.;
Davies, M. S.;
Francis, D. |
Author Affiliation: | Department of Plant Science, University College, Cardiff, UK |
Title: | The influence of zinc on the cell cycle in the root meristem of a zinc-tolerant and a non-tolerant cultivar of Festuca rubra L. |
Source: | New Phytologist. Vol. 102, No. 302, March 1986, p. 419-428. |
Publishing Information: | Oxford, England |
# of Pages: | 10 |
Keywords: | TIC Keywords: Zinc; Resistance; Cells; Cell division; Festuca rubra subsp. rubra; Mitotic index
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Abstract/Contents: | "Seedlings of a zinc tolerant cultivar (Merlin) and a non-tolerant cultivar (S59) of Festuca rubra L. were grown in aerated solution culture at various concentrations of zinc. The elongation of the longest root was much more inhibited by increasing Zn concentration in S59 than in Merlin. The mitotic index in the root meristem was reduced to a greater extent by increasing Zn concentration in S59 than in Merlin, whilst the cell doubling time (estimated by colchicine arrest) was increased by Zn much more in S59 than in Merlin. The kinetics of the cell cycle in the root meristem were determined by a pulse labelling experiment with low specific activity tritiated thymidine following a 4-d exposure to three concentrations of Zn (0, 0.1 and 0.2 ug Zn cm-3). Treatment with 0.1 and 0.2 ug zn cm-3 increased the length of the cell cycle by 40 and 132% respectively (compared with the zero Zn control treatment) in S59 but only by 6 and 16% respectively in Merlin. The increase in cell cycle length was due mainly to an increase in the duration of G1 in both cultivars; Zn had little effect on the duration of the other phases of the cell cycle. The growth fraction (the proportion of cycling cells in the meristem) was progressively reduced by increasing Zn concentration in S59 but was increased at 0.1 ug Zn cm-3 in Merlin and then reduced to the control level at the higher Zn concentration." |
Language: | English |
References: | 31 |
Note: | Figures Tables |
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete): Powell, M. J., M. S. Davies, and D. Francis. 1986. The influence of zinc on the cell cycle in the root meristem of a zinc-tolerant and a non-tolerant cultivar of Festuca rubra L.. New Phytol. 102(302):p. 419-428. |
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| Web URL(s): http://www.jstor.org/stable/2433315?seq=1#page_scan_tab_contents Last checked: 12/17/2015 Access conditions: Item is within a limited-access website |
| MSU catalog number: QK 1 .N38 |
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