The Effects of Temperature on the Durations of the Different Stages of Cell Division in the Root-tip

Brown, Rex V.

doi:10.1093/jxb/2.1.96

Cited by 108 publications

(31 citation statements)

References 5 publications

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“…Several observations support a change in the cell division rate for the Elongator mutant plants: The mitotic index was significantly lower in the mutant primordia 7 DAG (Fig. 2E), implying that the duration of interphase was prolonged over that of mitosis (37). Moreover, the distance between the nuclei, which is a direct measure of cell size (19), was significantly higher in the elo mutants, and the cells were larger (Fig.…”

Section: The Elo Mutants Have a Reduced Cell Proliferation Rate Probmentioning

confidence: 57%

The elongata mutants identify a functional Elongator complex in plants with a role in cell proliferation during organ growth

Nelissen

Fleury

Bruno

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

151

238

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The key enzyme for transcription of protein-encoding genes in eukaryotes is RNA polymerase II (RNAPII). The recruitment of this enzyme during transcription initiation and its passage along the template during transcription elongation is regulated through the association and dissociation of several complexes. Elongator is a histone acetyl transferase complex, consisting of six subunits (ELP1-ELP6), that copurifies with the elongating RNAPII in yeast and humans. We demonstrate that point mutations in three Arabidopsis thaliana genes, encoding homologs of the yeast Elongator subunits ELP1, ELP3 (histone acetyl transferase), and ELP4 are responsible for the phenotypes of the elongata2 (elo2), elo3, and elo1 mutants, respectively. The elo mutants are characterized by narrow leaves and reduced root growth that results from a decreased cell division rate. Morphological and molecular phenotypes show that the ELONGATA (ELO) genes function in the same biological process and the epistatic interactions between the ELO genes can be explained by the model of complex formation in yeast. Furthermore, the plant Elongator complex is genetically positioned in the process of RNAPII-mediated transcription downstream of Mediator. Our data indicate that the Elongator complex is evolutionarily conserved in structure and function but reveal that the mechanism by which it stimulates cell proliferation is different in yeast and plants.Arabidopsis ͉ histone acetyl transferase complex ͉ leaf development ͉ RNA polymerase II

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Section: The Elo Mutants Have a Reduced Cell Proliferation Rate Probmentioning

confidence: 57%

The elongata mutants identify a functional Elongator complex in plants with a role in cell proliferation during organ growth

Nelissen

Fleury

Bruno

et al. 2005

Proc. Natl. Acad. Sci. U.S.A.

151

238

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show abstract

“…Brown (1951) found that the mean duration of mitosis in Pisurn at various temperatures was as follows : 150 C., 295 hours 2. Meiosis showed a rapid shortening of duration with increasing temperature, but the Q values fall as the temperature rises.…”

Section: Methodsmentioning

confidence: 97%

“…On the other hand, in mitosis Barber (1939) studied the rate of chromosome movement at anaphase in staminal hairs of Tradescantia at various temperatures, and much fuller data on plant and animal material have been provided by Hughes (1952). Brown (1951) determined the duration of various stages of cell division in root tips of Pisum at the temperatures of 15, 20, 25 and 30° C. In the present paper an account is given of an attempt to determine the rate of complete meiosis (not the various stages) in pollen mother-cells of the Bluebell, Endymion nonscriptus (L.) Garcke at different temperatures, and to compare this with the rate of mitosis. showed an early stage of meiosis, then the inflorescence (with thc stem and roots of the bulb still attached to it) was labclled and placed on a pad of wet cotton-wool in a petri-dish and covered with a similar pad in the lid.…”

Section: Introductionmentioning

confidence: 99%

Duration of meiosis in relation to temperature

Wilson¹

1959

Heredity

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“…The effect of temperature on the cell division in pea roots was studied by Brown (1951) and Thomson (1954). The latter has studied the same on Oat also.…”

Section: Introductionmentioning

confidence: 99%

Environmental Control of Mitosis in the Roots of <i>Ephedra foliata</i>

Sarma

1969

CYTOLOGIA

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The Effects of Temperature on the Durations of the Different Stages of Cell Division in the Root-tip

Cited by 108 publications

References 5 publications

The elongata mutants identify a functional Elongator complex in plants with a role in cell proliferation during organ growth

The elongata mutants identify a functional Elongator complex in plants with a role in cell proliferation during organ growth

Duration of meiosis in relation to temperature

Environmental Control of Mitosis in the Roots of <i>Ephedra foliata</i>

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