Genetic and environmental factors in the trade‐off between sexual and asexual reproduction of a rare clonal angiosperm

Hewitt, Alison

doi:10.1111/aec.12846

Cited by 3 publications

(2 citation statements)

References 64 publications

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“…A trade-off can occur when there is a limitation in pollen and the effect of genetic load, i.e., an exchange between sexual and asexual reproduction (Oliveira et al, 2015;Hewitt, 2020). These factors may affect seed development, increasing the number of empty seeds.…”

Section: Resultsmentioning

confidence: 99%

Effect of long-term storage on viability of buffel grass (Cenchrus ciliaris L.) seeds

Silva

et al. 2022

J. Seed Sci.

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Prolonged storage of seeds may lead to decreases in seed quality, negatively affecting germination and vigor and preventing the obtaining of a promising stand. Seed quality is a critical factor, and the performance of the lot can be altered by vigor, dormancy and, mainly, by the time and conditions in which the seeds were stored. In the experiment, the physiological quality of seeds 14 genotypes of buffel grass (Cenchrus ciliaris L.) genotypes stored for a period of thirteen years in cold conditions was evaluated. The seeds were subjected to germination induction treatment with potassium nitrate (KNO3) and evaluated to identify seeds with presence and absence of embryos. The seed storage period affected their germination capacity and the use of KNO3 did not increase seed germination. A low number of full seeds was found for genotype 613 (12%). The relative germination percentages did not underestimate the buffel grass seed germination potential, as it is usually calculated, providing an improved distinction between the evaluated genotypes. The use of KNO3 increased the seedling root and shoot weights of some genotypes, as well as the dry matter weight of seedlings, an important characteristic for forage production. The prolonged storage affects the physiological quality of buffel grass seeds. The production of seeds without embryo is a problem found for this species, which affects the final quality of the seed lots produced.

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Section: Resultsmentioning

confidence: 99%

Effect of long-term storage on viability of buffel grass (Cenchrus ciliaris L.) seeds

Silva

et al. 2022

J. Seed Sci.

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“…Investigations in temperate forests demonstrate that plasticity in expression of reproductive mode by clonal woody plants is driven by changes in components of the forest environment across space and time (Bunnell, 1990 ; Hewitt, 2020 ; Hosaka et al., 2008 ; Kanno & Seiwa, 2004 ; Moola & Vasseur, 2009 ; Salter et al., 2010 ). Variations in the availability of light, soil moisture, and other biotic and abiotic resources can affect resource acquisition, which then influences resource allocation patterns of a plant.…”

Section: Introductionmentioning

confidence: 99%

Intensity and mode of Lindera melissifolia reproduction are affected by flooding and light availability

Leininger

Gardiner

Lockhart

et al. 2021

Ecology and Evolution

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We studied the impact of flooding and light availability gradients on sexual and asexual reproduction in Lindera melissifolia (Walt.) Blume, an endangered shrub found in floodplain forests of the Mississippi Alluvial Valley (MAV), USA. A water impoundment facility was used to control the duration of soil flooding (0, 45, or 90 days), and shade houses were used to control light availability (high = 72%, intermediate = 33%, or low = 2% of ambient light) received by L. melissifolia established on native soil of the MAV. Sexual reproductive intensity, as measured by inflorescence bud count, fruit set, and drupe production, was greatest in the absence of soil flooding. Ninety days of soil flooding in the year prior to anthesis decreased inflorescence bud counts, and 45 days of soil flooding in the year of anthesis lessened fruit set and drupe production. Inflorescence bud development was the greatest in environments of intermediate light, decreased in high-light environments, and was absent in low light environments. But low fruit set diminished drupe production in intermediate light environments as compared to high light environments. Asexual reproduction, as measured by development of new ramets, was greatest in the absence of soil flooding and where plants were grown in high or intermediate light. Plants exhibited plasticity in reproductive mode such that soil flooding increased the relative importance of asexual reproduction. The high light environment was most favorable to sexual reproduction, and reproductive mode transitioned to exclusively asexual in the low light environment. Our results raise several implications important to active management for the conservation of this imperiled plant.

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Mating system, morphological and genetic evidence endorse clonality as an essential reproductive mode in Daphnopsis filipedunculata (Thymelaeaceae), a dioecious and endemic species from the Amazon

Carvalho,

da Costa,

Leal

et al. 2024

AoB PLANTS

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Background and Aims: Clonality is characterized by the formation of independent individuals of the same genotype that are capable of reproducing and propagating vegetatively. Although clonality is an important mechanism that facilitates the persistence of a population, its extensive use can lead to negative impacts on sexual reproduction due to trade-offs in the investment of resources. Therefore, studies on the sexual reproduction of species that exhibit clonality can provide information about resilience to environmental changes, information about fecundity, the risk of the absence of pollinators and the ability to persist in unfavourable conditions and to successfully occupy new areas. Here, we investigated the role of clonal propagation and sexual reproduction in Daphnopsis filipedunculata (Thymelaeaceae), a dioecious species distributed only in Serra dos Carajás. Methods: We evaluated the extent of clonality in this species using molecular tools and anatomical analyses of the underground system responsible for developing new ramets. Furthermore, we analysed the sexual system and its contribution to reproductive success through morphometric analyses of floral types and pollination experiments in the field. Key Results: Overall, we found that clonal propagation plays an important role in maintaining the population of D. filipedunculata. Specifically, we demonstrated that this species presents functional male and female plants, indicating that D. filipedunculata is an obligate xenogamous species but has low reproductive success. We also showed that clonal vegetative propagation is the main form of asexual reproduction in this species, with roots responsible for clonal growth. Finally, our results indicated that this species presents an intermediate phalanx–guerrilla clonal architecture. Conclusions: Our study provides the first insights into sexual reproduction and clonal propagation in D. filipedunculata and can inform management practices, conservation and the restoration of endemic species.

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Genetic and environmental factors in the trade‐off between sexual and asexual reproduction of a rare clonal angiosperm

Cited by 3 publications

References 64 publications

Effect of long-term storage on viability of buffel grass (Cenchrus ciliaris L.) seeds

Effect of long-term storage on viability of buffel grass (Cenchrus ciliaris L.) seeds

Intensity and mode of Lindera melissifolia reproduction are affected by flooding and light availability

Mating system, morphological and genetic evidence endorse clonality as an essential reproductive mode in Daphnopsis filipedunculata (Thymelaeaceae), a dioecious and endemic species from the Amazon

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