| 1. |
- Thomas, HS, et al.
(författare)
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- 2019
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swepub:Mat__t
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| 2. |
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| 3. |
- Belfield, Eric J., et al.
(författare)
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Thermal stress accelerates Arabidopsis thaliana mutation rate
- 2021
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Ingår i: Genome Research. - : COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT. - 1088-9051 .- 1549-5469. ; 31:1, s. 40-50
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Tidskriftsartikel (refereegranskat)abstract
- Mutations are the source of both genetic diversity and mutational load. However, the effects of increasing environmental temperature on plant mutation rates and relative impact on specific mutational classes (e.g., insertion /deletion [indel] vs. single nucleotide variant [SNV]) are unknown. This topic is important because of the poorly defined effects of anthropogen ic global temperature rise on biological systems. Here, we show the impact of temperature increase on Arabidopsis thaliana mutation, studying whole genome profiles of mutation accumulation (MA) lineages grown for 11 successive generations at 29 degrees C. Whereas growth of A. thaliana at standard temperature (ST; 23 degrees C) is associated with a mutation rate of 7 x10(-9) base substitutions per site per generation, growth at stressful high temperature (HT; 29 degrees C) is highly mutagenic, increasing the mutation rate to 12 x 10(-9). SNV frequency is approximately two- to threefold higher at HT than at ST, and HT-growth causes an similar to 19- to 23-fold increase in indel frequency, resulting in a disproportionate increase in indels (vs. SNVs). Most HT-induced indels are 1-2 bp in size and particularly affect homopolymeric or dinucleotide A or T stretch regions of the genome. HT-induced indels occur disproportionately in nucleosome-free regions, suggesting that much HT-induced mutational damage occurs during cell-cycle phases when genomic DNA is packaged into nucleosomes. We conclude that stressful experimental temperature increases accelerate plant mutation rates and particularly accelerate the rate of indel mutation. Increasing environmental temperatures are thus likely to have significant mutagenic consequences for plants growing in the wild and may, in particular, add detrimentally to mutational load.
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| 4. |
- van Es, Sam W.
(författare)
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Baby don't cry, genetic regulation of the weeping phenotype in Prunus mume
- 2020
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Ingår i: Physiologia Plantarum. - : John Wiley & Sons. - 0031-9317 .- 1399-3054. ; 170:3, s. 315-317
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Trees are an elegant and majestic lifeform and have for centuries been used by humans to create more pleasurable surroundings. One type of tree that perhaps sparks the imagination more than any other is one that exhibits the weeping branch phenotype. Recognized for their beauty, their drooping, downward facing branches makes them much sought after in parks and gardens. Despite a pretty clear idea of the structural difference of the weeping phenotype, little is known on the molecular regulation of the trait. In this issue of Physiologia Plantarum, Mao et al. (2020) screened for candidate genes related to the weeping phenotype to enhance our understanding of the molecular basis behind this characteristic way of growth.
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| 5. |
- van Es, Sam W.
(författare)
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In the spotlight : walk on the wild side
- 2023
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Ingår i: Physiologia Plantarum. - : Scandinavian Plant Physiology Society. - 0031-9317 .- 1399-3054. ; 175:6
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Animals appear to have scrambled, trotted, walked, and slithered onto dry land many times during the course of evolution. Land plants on the other hand are thought to have evolved from a single common ancestor, a species of multicellular green algae that left its freshwater habitat somewhere between 400 and 500 million years ago. In doing so, it faced an extremely different environment on land and needed to adapt to changes in, among others, water availability, light conditions, gravity, and temperature. How did they cope?.
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| 6. |
- van Es, Sam W.
(författare)
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Remember the time
- 2022
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Ingår i: Physiologia Plantarum. - : John Wiley & Sons. - 0031-9317 .- 1399-3054. ; 174:6
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Like the ability of a fox to avoid the same snare twice, the plant Arabidopsis thaliana seems to be able to respond differently to an event it has previously encountered. Shrewdness is no surprising characteristic of a fox, but the comparison does invite the question: do plants possess memory? In this edition of Physiologia Plantarum, the article by Vyse et al. (2022) describes how Arabidopsis responds differently to cold-stress, when encountering it for the first time (priming) and to a second similar stress after a memory phase (triggering). Arabidopsis seems to perceive the stress after triggering as a milder one and the authors postulate that the memory of the first occurrence of the stress reduces the amount of resources needed to cope with the cold-stress a second time.
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| 7. |
- van Es, Sam W.
(författare)
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Rockin' in rhythm, growth dynamics of the peat moss Sphagnum
- 2020
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Ingår i: Physiologia Plantarum. - : John Wiley & Sons. - 0031-9317 .- 1399-3054. ; 168:4, s. 762-764
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The genus Sphagnum is an essential component in the formation and maintenance of high latitude peatlands, bogs and mires. The species grows in dense, extended mats of agglomerated shoots that allow it to retain water necessary for its growth. These mats are partly responsible for maintaining the right conditions for other species in these wetlands to thrive. In this issue of Physiologia Plantarum, Mironov et al. (2020) monitored the growth of Sphagnum riparium for a period of 4 years and revealed three distinct growth rhythms: a seasonal temperature dependent, a circalunar and a third one, synchronized with the circalunar. This synchronised nature of Sphagnum growth could contribute to its position as a key species in the maintenance of peatlands.
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| 8. |
- van Es, Sam W.
(författare)
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The times, they are a-changin'
- 2022
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Ingår i: Physiologia Plantarum. - : John Wiley & Sons. - 0031-9317 .- 1399-3054. ; 174:3
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- van Es, Sam W.
(författare)
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Too hot to handle, the adverse effect of heat stress on crop yield
- 2020
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Ingår i: Physiologia Plantarum. - : John Wiley & Sons. - 0031-9317 .- 1399-3054. ; 169:4, s. 499-500
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A major part of the human diet is made up by seeds such as wheat, rice and maize; both as staple crops and as raw material for livestock feed. The yield of these crops is highly dependent on successful flower development, pollination and proper timing of seed set. However, significant yield loss is caused by stress factors such as excessive heat and drought, which are being exacerbated by ongoing climate change (Zhao et al. 2017). Pollen development, in particular, is highly sensitive to heat stress (Mesihovic et al. 2016) and in an effort to enhance our understanding of plant responses to heat stress, with the view of aiding breeding efforts, Bheemanahalli et al. (2020) used metabolic and hormonal profiling to investigate the regulation of heat stress tolerance in two wheat genotypes.
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