Effect of seed mass and number of cotyledons on seed germination after heat treatment in Pinus sylvestris L. var. iberica Svob.

Castoldi, Elena; Molina, José Antonio

doi:10.5424/fs/2014233-05480

Cited by 3 publications

(1 citation statement)

References 22 publications

(19 reference statements)

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“…However, no reports are found of the release of a breeding line with 100% phenotypic polycotyledony. Despite this, literature also exists on correlated responses to tricotyly selection [79,114,115] and associations between cotyledons and other traits (e.g., [22,98,116,117]). Based on the theory of correlated responses to polygenic selection, Haskell [118] promoted the use of seedling morphologies such as polycotyly as a tool to facilitate plant breeding, particularly forest tree breeding.…”

Section: Breedingmentioning

confidence: 99%

Polycotyly: How Little Do We Know?

2024

Plants

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Polycotyly, an interesting characteristic of seed-bearing dicotyledonous plants with more than two cotyledons, represents one of the least explored plant characters for utilization, even though cotyledon number was used to classify flowering plants in 1682. Gymnosperm and angiosperm species are generally known to have one or two cotyledons, but scattered reports exist on irregular cotyledon numbers in many plant species, and little is known about the extent of polycotyly in plant taxa. Here, we attempt to update the documentation of reports on polycotyly in plant species and highlight some lines of research for a better understanding of polycotyly. This effort revealed 342 angiosperm species of 237 genera in 80 (out of 416) families and 160 gymnosperm species of 26 genera in 6 (out of 12) families with reported or cited polycotyly. The most advanced research included the molecular-based inference of the phylogeny of flowering plants, showing a significant departure from the cotyledon-based classification of angiosperm plants, and the application of genetic cotyledon mutants as tools to clone and characterize the genes regulating cotyledon development. However, there were no reports on breeding lines with a 100% frequency of polycotyly. Research is needed to discover plant species with polycotyly and to explore the nature, development, genetics, evolution, and potential use of polycotyly.

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Section: Breedingmentioning

confidence: 99%

Polycotyly: How Little Do We Know?

2024

Plants

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Influence of burning and mechanical clearing on the provision of Gentiana lutea L. in the Iberian Peninsula

Fernández-García

Centeno

Calvo

2023

Journal of Applied Research on Medicinal and Aromatic Plants

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Seeds of future past: climate change and the thermal memory of plant reproductive traits

2018

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Plant persistence and migration in face of climate change depends on successful reproduction by seed, a central aspect of plant life that drives population dynamics, community assembly and species distributions. Plant reproduction by seed is a chain of physiological processes, the rates of which are a function of temperature, and can be modelled using thermal time models. Importantly, while seed reproduction responds to its instantaneous thermal environment, there is also evidence of phenotypic plasticity in response to the thermal history experienced by the plant's recent ancestors, by the reproducing plant since seedling establishment, and by its seeds both before and after their release. This phenotypic plasticity enables a thermal memory of plant reproduction, which allows individuals to acclimatise to their surroundings. This review synthesises current knowledge on the thermal memory of plant reproduction by seed, and highlights its importance for modelling approaches based on physiological thermal time. We performed a comprehensive search in the Web of Science and analysed 533 relevant articles, of which 81 provided material for a meta-analysis of thermal memory in reproductive functional traits based on the effect size Zr. The articles encompassed the topics of seed development, seed yield (mass and number), seed dormancy (physiological, morphological and physical), germination, and seedling establishment. The results of the meta-analysis provide evidence for a thermal memory of seed yield, physiological dormancy and germination. Seed mass and physiological dormancy appear to be the central hubs of this memory. We argue for integrating thermal memory into a predictive framework based on physiological time modelling. This will provide a quantitative assessment of plant reproduction, a complex system that integrates past and present thermal inputs to achieve successful reproduction in changing environments. The effects of a warming environment on plant reproduction cannot be reduced to a qualitative interpretation of absolute positives and negatives. Rather, these effects need to be understood in terms of changing rates and thresholds for the physiological process that underlie reproduction by seed.

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Effect of seed mass and number of cotyledons on seed germination after heat treatment in Pinus sylvestris L. var. iberica Svob.

Cited by 3 publications

References 22 publications

Polycotyly: How Little Do We Know?

Polycotyly: How Little Do We Know?

Influence of burning and mechanical clearing on the provision of Gentiana lutea L. in the Iberian Peninsula

Seeds of future past: climate change and the thermal memory of plant reproductive traits

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