Flowering time and seed dormancy control use external coincidence to generate life history strategy

Springthorpe, V S; Penfield, Steven

doi:10.7554/elife.05557

Cited by 100 publications

(132 citation statements)

References 42 publications

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“…This seed-specific memory might be expected of a rapid-cycling annual species whose success is dependent on seed behavior (Grime et al, 1981;Thompson, 1994;Springthorpe and Penfield, 2015). Any effect of enhanced seed dormancy on other developmental phenotypes, in this study, would have been masked by the seed stratification treatment performed prior to experimentation.…”

Section: Transgenerational Inheritance and Methylome Profilingmentioning

confidence: 87%

The Arabidopsis DNA Methylome Is Stable under Transgenerational Drought Stress

et al. 2017

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Improving the responsiveness, acclimation, and memory of plants to abiotic stress holds substantive potential for improving agriculture. An unresolved question is the involvement of chromatin marks in the memory of agriculturally relevant stresses. Such potential has spurred numerous investigations yielding both promising and conflicting results. Consequently, it remains unclear to what extent robust stress-induced DNA methylation variation can underpin stress memory. Using a slow-onset water deprivation treatment in Arabidopsis (Arabidopsis thaliana), we investigated the malleability of the DNA methylome to drought stress within a generation and under repeated drought stress over five successive generations. While drought-associated epialleles in the methylome were detected within a generation, they did not correlate with drought-responsive gene expression. Six traits were analyzed for transgenerational stress memory, and the descendants of drought-stressed lineages showed one case of memory in the form of increased seed dormancy, and that persisted one generation removed from stress. With respect to transgenerational drought stress, there were negligible conserved differentially methylated regions in drought-exposed lineages compared with unstressed lineages. Instead, the majority of observed variation was tied to stochastic or preexisting differences in the epigenome occurring at repetitive regions of the Arabidopsis genome. Furthermore, the experience of repeated drought stress was not observed to influence transgenerational epi-allele accumulation. Our findings demonstrate that, while transgenerational memory is observed in one of six traits examined, they are not associated with causative changes in the DNA methylome, which appears relatively impervious to drought stress.

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Section: Transgenerational Inheritance and Methylome Profilingmentioning

confidence: 87%

The Arabidopsis DNA Methylome Is Stable under Transgenerational Drought Stress

et al. 2017

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“…This is reflected in seed dormancy variation between accessions and its underlying genetic variation (Springthorpe and Penfield, 2015). Therefore, it is not surprising that analyses of natural variation in seed dormancy between Arabidopsis accessions yielded several dormancy quantitative trait loci (QTLs; AlonsoBlanco et al, 2003;Bentsink et al, 2010).…”

mentioning

confidence: 99%

Sequence Polymorphisms at the REDUCED DORMANCY5 Pseudophosphatase Underlie Natural Variation in Arabidopsis Dormancy

et al. 2016

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Seed dormancy controls the timing of germination, which regulates the adaptation of plants to their environment and influences agricultural production. The time of germination is under strong natural selection and shows variation within species due to local adaptation. The identification of genes underlying dormancy quantitative trait loci is a major scientific challenge, which is relevant for agricultural and ecological goals. In this study, we describe the identification of the DELAY OF GERMINATION18 (DOG18) quantitative trait locus, which was identified as a factor in natural variation for seed dormancy in Arabidopsis (Arabidopsis thaliana). DOG18 encodes a member of the clade A of the type 2C protein phosphatases family, which we previously identified as the REDUCED DORMANCY5 (RDO5) gene. DOG18/RDO5 shows a relatively high frequency of loss-offunction alleles in natural accessions restricted to northwestern Europe. The loss of dormancy in these loss-of-function alleles can be compensated for by genetic factors like DOG1 and DOG6, and by environmental factors such as low temperature. RDO5 does not have detectable phosphatase activity. Analysis of the phosphoproteome in dry and imbibed seeds revealed a general decrease in protein phosphorylation during seed imbibition that is enhanced in the rdo5 mutant. We conclude that RDO5 acts as a pseudophosphatase that inhibits dephosphorylation during seed imbibition.

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“…• Lower temperatures with as little as 1°C differences (T critical = 15°C) to the maternal plant in Arabidopsis, on the contrary, tend to enhance final seed dormancy levels [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…• Climate change is accelerating plant developmental transitions in temperate environments and advanced flower timing increases dormancy intensities [5,8,18]. …”

Section: Introductionmentioning

confidence: 99%

Roles of the Environment in Plant Life-History Trade-offs

Liu¹,

Walck²,

El‐Kassaby³

2017

Advances in Seed Biology

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Variation in plant life-history and functional traits at between-and within-species levels has key ecological consequences, in which environmental settings impose strong selective pressures and play a vital role throughout life cycles. Our general notion for plant life-history strategies may be that, relative to tall, long-lived plants, short-lived species have features of small stature, small-seededness, rapid growth, and low seedling survival (k-versus r-selection). Rate of evolution may be an important agent of selection and annals evolve more rapidly than perennial congeners. These empirical observations prompt a suite of enticing questions, such as how do life-history traits interplay with functional trait at late stages of regeneration? what are the primary trade-offs in a cohort of key life-history traits that may have undergone stabilizing selection? and how do environmental filters differently affect adaptive trait variation in annuals and perennials? In this chapter, we intend to address aforementioned questions via assembling our updated knowledge with emphasis on seed mass and temporal and spatial dimensions of seed dispersal. Through such synthesis, we wish to raise awareness about life-history trade-offs and provide a holistic understanding of the extent to which climate change is likely to impact plant adaptation and eco-evolutionary trajectories of life-history phenotypes.

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Flowering time and seed dormancy control use external coincidence to generate life history strategy

Cited by 100 publications

References 42 publications

The Arabidopsis DNA Methylome Is Stable under Transgenerational Drought Stress

The Arabidopsis DNA Methylome Is Stable under Transgenerational Drought Stress

Sequence Polymorphisms at the REDUCED DORMANCY5 Pseudophosphatase Underlie Natural Variation in Arabidopsis Dormancy

Roles of the Environment in Plant Life-History Trade-offs

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