Induction of zygote formation by ethylene during the sexual development of the cellular slime mold Dictyostelium mucoroides

Amagai, Aiko

doi:10.1111/j.1432-0436.1989.tb00745.x

Cited by 26 publications

(37 citation statements)

References 20 publications

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“…The periods during which ethylene is necessary for macrocyst formation are shown by a grey zone. The timing when ethylene becomes unnecessary for macrocyst formation is consistent with the timing of the appearance of binucleate cells (basically from Amagai, 1989).…”

Section: Fig 4 the Formation Of Binucleate Cells During Macrocyst Fsupporting

confidence: 70%

“…However, when ethylene was applied in the culture dishes at the beginning of this culture, the time requiring non-necessity of ethylene for macrocyst formation was advanced in concert with the advanced and increased formation of binucleate cells (Amagai, 1989). These results strongly suggest that ethylene may directly induce zygote formation.…”

Section: Control Of Zygote Formation By Two Regulatorsmentioning

confidence: 88%

“…After a resting period, the macrocyst germinates to release several amoeboid cells and initiates a new life cycle (Nickerson & Raper, 1973). Cytophagic cells (giant cells) formed during macrocyst formation have been proved to be zygotes that are produced by cell fusion and subsequent nuclear fusion (Amagai, 1989). Fig.…”

Section: Introductionmentioning

confidence: 99%

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Regulatory Mechanism in Sexual and Asexual Cycles of Dictyostelium

Amagai¹

2012

Advances in Selected Plant Physiology Aspects

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Section: Fig 4 the Formation Of Binucleate Cells During Macrocyst Fsupporting

confidence: 70%

Section: Control Of Zygote Formation By Two Regulatorsmentioning

confidence: 88%

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Regulatory Mechanism in Sexual and Asexual Cycles of Dictyostelium

Amagai¹

2012

Advances in Selected Plant Physiology Aspects

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“…Recently, ethylene was found to be an intrinsic macrocyst-inducing factor (Amagai, 1984(Amagai, , 1987, while CAMP, a chemoattractant at the aggregation stage, was found to inhibit macrocyst formation and induce sorocarp formation (Amagai & Filosa, 1984;Amagai, 1987). Amagai (1989) also found that ethylene specifically induces formation of zygotic giant cells through cell fusion.…”

Section: Introductionmentioning

confidence: 99%

“…In each precyst there arises a cytophagic cell (zygotic giant cell) that is formed by the fusion of two cells (Amagai, 1989). The cytophagic cell increases in size, engulfing in turn all the other cells in the precyst.…”

Section: Introductionmentioning

confidence: 99%

The influence of pH on the choice between sexual and asexual development in Dictyostelium mucoroides

Iijima

Maeda

1990

Journal of General Microbiology

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The cellular slime mould Dictyostelium mucoroides exhibits clear dimorphism in development which, depending upon environmental conditions, leads to (1) macrocyst formation, a sexual process or (2) sorocarp formation, an asexual process. The present work was undertaken to determine the role of protons in the determination of the developmental mode. Intracellular pH (pHi) was measured at the single-cell level microfluorometrically by use of the pH-sensitive fluorescent dye carboxfluorescein. The proton-pump inhibitor diethylstilboestrol, the protonophore 2,4-dinitrophenol and a weak acid, propionate, were found to convert the developmental mode from macrocyst to sorocarp formation under conditions otherwise favouring macrocyst formation. All of these drugs lowered pHi. Although no significant difference in pHi was detected between dissociated cells shaken in buffers of pH 5.0 and pH 7.0, a marked difference in pHi arose between the two if 5 mM-NH,Cl was included to simulate the expected microenvironment in the cell mass during development. Comparison of the pHi of cells developing toward sorocarps with that of cells developing toward macrocysts revealed a few cells with extremely high pHi ( > 7.30) in the latter population. The results obtained suggested that pHi, or something related to pHi, influences the development a1 choice.

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Ethylene Receptors in Nonplant Species

2019

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The effects of ethylene and ethylene signal transduction have been long studied in plants. It was only recently reported that a single-celled cyanobacterium, Synechocystis, contains a functional ethylene receptor. However, it remains to be determined if functional ethylene receptors are more widespread. This review summarizes what is known about responses to ethylene, ethylene receptors, and signal transduction in non-plant species. A summary is provided of information gleaned from searches of sequenced genomes and the possibility that ethylene receptors are widespread in microbes is discussed.

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Induction of zygote formation by ethylene during the sexual development of the cellular slime mold Dictyostelium mucoroides

Cited by 26 publications

References 20 publications

Regulatory Mechanism in Sexual and Asexual Cycles of Dictyostelium

Regulatory Mechanism in Sexual and Asexual Cycles of Dictyostelium

The influence of pH on the choice between sexual and asexual development in Dictyostelium mucoroides

Ethylene Receptors in Nonplant Species

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