Temperature and chiasma formation in Schistocerca gregaria

Henderson, Scott

doi:10.1038/hdy.1963.6

Cited by 21 publications

(2 citation statements)

References 21 publications

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“…These results suggest that near a critical threshold, beyond which synapsis fails altogether, SC instabilities are already evident. Similar trends are seen in animals, from grasshoppers to mice (Nebel & Hackett, ; Henderson, ). Most reported SC failures involve high temperature, but low‐temperature failure has been reported in Hyacinthus orientalis , two species of Solanum , and the newt Cynops pyrrhogaster (Elliott, ; Karihaloo, ; Yazawa et al ., ).…”

Section: Environment As a Driver Of Meiotic Evolutionsupporting

confidence: 64%

Meiosis evolves: adaptation to external and internal environments

2015

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306I.306II.307III.312IV.317V.318319References319 Summary Meiosis is essential for the fertility of most eukaryotes and its structures and progression are conserved across kingdoms. Yet many of its core proteins show evidence of rapid or adaptive evolution. What drives the evolution of meiosis proteins? How can constrained meiotic processes be modified in response to challenges without compromising their essential functions? In surveying the literature, we found evidence of two especially potent challenges to meiotic chromosome segregation that probably necessitate adaptive evolutionary responses: whole‐genome duplication and abiotic environment, especially temperature. Evolutionary solutions to both kinds of challenge are likely to involve modification of homologous recombination and synapsis, probably via adjustments of core structural components important in meiosis I. Synthesizing these findings with broader patterns of meiosis gene evolution suggests that the structural components of meiosis coevolve as adaptive modules that may change in primary sequence and function while maintaining three‐dimensional structures and protein interactions. The often sharp divergence of these genes among species probably reflects periodic modification of entire multiprotein complexes driven by genomic or environmental changes. We suggest that the pressures that cause meiosis to evolve to maintain fertility may cause pleiotropic alterations of global crossover rates. We highlight several important areas for future research.

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Section: Environment As a Driver Of Meiotic Evolutionsupporting

confidence: 64%

Meiosis evolves: adaptation to external and internal environments

2015

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“…A high temperature induced asynapsis effect has been reported many decades ago in male meiocytes of various organisms (reviewed in Bomblies et al. (2015) ) including desert locust ( Henderson, 1963 ), mouse ( Nebel and Hackett, 1961 ) and several plant species, such as Triticum aestivum ( Bayliss and Riley, 1972 ) and Allium ursinum ( Loidl, 1989 ). In agreement with these earlier reports, heat-stressed tomato meiocytes exhibit impaired synapsis and loss of obligate crossovers resulting in univalent formation in prophase I.…”

Section: Discussionmentioning

confidence: 99%

Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress

et al. 2023

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Susceptibility of the reproductive system to temperature fluctuations is a recurrent problem for crop production under a changing climate. The damage is complex as multiple processes in male and female gamete formation are affected, but in general, particularly pollen production is impaired. Here, the impact of short periods of elevated temperature on male meiosis of tomato (Solanum lycopersicon L.) is reported. Meiocytes in early stage flower buds exposed to heat stress (>35°C) exhibit impaired homolog synapsis resulting in partial to complete omission of chiasmata formation. In the absence of chiasmata, univalents segregate randomly developing unbalanced tetrads and polyads resulting in aneuploid spores. However, most heat-stressed meiotic buds primarily contain balanced dyads, indicating a propensity to execute meiotic restitution. With most meiocytes exhibiting a complete loss of chiasma formation and concomitantly showing a mitotic-like division, heat stress triggers first division restitution resulting in clonal spores. These findings corroborate with the plasticity of male meiosis under heat and establish a natural route for the induction of sexual polyploidization in plants and the engineering of clonal seed.

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Hyperthermia induced dissociation of the X‐Y bivalent in mice

Garriott

Chrisman

1980

Environ. mutagen

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The mutagenic potential of hyperthermia was examined employing a spermatocyte test on males heat stressed continuously for 2, 3. or 5 days. Stress conditions were 35 +/- 1 degrees C and 65 +/- 3% relative humidity. Males were sacrificed and meiotic preparations made from the testes at various intervals following removal from the stress environment. In this way, chromosome damage could be monitored in all premeiotic and early prophase I stages of spermatogenesis. Results of this study revealed a significant increase in the incidence of X and Y univalents at metaphase I. The significance of this finding is discussed.

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Temperature and chiasma formation in Schistocerca gregaria

Cited by 21 publications

References 21 publications

Meiosis evolves: adaptation to external and internal environments

Meiosis evolves: adaptation to external and internal environments

Asynapsis and meiotic restitution in tomato male meiosis induced by heat stress

Hyperthermia induced dissociation of the X‐Y bivalent in mice

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