Effect of light on seed germination and seedling shape of succulent species from Mexico

Flores, Joel; González-Salvatierra, Claudia; Jurado, Enrique

doi:10.1093/jpe/rtv046

Cited by 59 publications

(40 citation statements)

References 20 publications

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“…The responses of germination according to light generally vary between habitats, such as forests, where the presence of a strong light may be associated to the increase in the probability of seedling establishment and, thus, increase the germination percentage of some species (Flores et al, 2016). However, in the present study, P. pyrifolia did not present this kind of pattern (germination only with light), which probably gives more germination capacity under different light conditions.…”

Section: Resultscontrasting

confidence: 75%

Morphometry and Germination of Passovia pyrifolia, Struthanthus marginatus and Phoradendron mucronatum Diaspores

et al. 2018

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-The goal of this work was to characterize morphometrically diaspores from three species of mistletoes (Passovia pyrifolia, Struthanthus marginatus e Phoradendron mucronatum), as well as to study its germination behavior according to temperature and luminosity. In germination tests, the completely randomized design was used, in factor scheme 4 x 2, with 4 replications of 15 diaspores. The factors for the first test were different temperatures and two diaspore conditions (intact and without epicarp). In the second test, factors were different light qualities and two diaspore conditions. The analyzed variables were: germination percentage, germination rate index (GRI) and mean germination time (MGT). Mistletoe's diaspores present an elliptic shape with viscin layer, an essential characteristic for the dispersion of the species. In addition to this, they present a distinction as for the moisture content when compared to the Loranthaceae and Viscaceae, where the latter presents the highest content. Germination is greater at the alternated temperature of 20-30 o C for P. pyrifolia and P. mucronatum diaspores and 20 o C for S. marginatus. Luminosity interfered in the germination of P. mucronatum and S. marginatus but did not influence P. pyrifolia. The diaspore condition influenced the germination of the three studied species, observing a significant increase in their germination when the epicarp was removed. Temperature and luminosity interfere directly in the GRI and MGT of the three mistletoes species.Keywords: mistletoes, temperature, luminosity. RESUMO -O objetivo deste trabalho foi caracterizar morfometricamente diásporos de três espécies de ervas-de-passarinho (Passovia pyrifolia, Struthanthus marginatus e Phoradendron mucronatum), bem como estudar o seu comportamento germinativo em função de temperatura e luminosidade. Nos ensaios de germinação utilizou-se o delineamento inteiramente casualizado em esquema fatorial 4 x 2, com 4 repetições de 15 diásporos. Os fatores para o primeiro ensaio foram diferentes temperaturas e duas condições do diásporo (intacto e sem epicarpo). No segundo ensaio, os fatores foram diferentes qualidades de luz e duas condições do diásporo. As variáveis analisadas foram: porcentagem de germinação, índice de velocidade de germinação (IVG) e tempo médio de germinação (TMG). Os diásporos de ervas

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Section: Resultscontrasting

confidence: 75%

Morphometry and Germination of Passovia pyrifolia, Struthanthus marginatus and Phoradendron mucronatum Diaspores

et al. 2018

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“…Seeds of L. apetalum had higher germination in light than in darkness, suggesting that seeds on the soil surface are capable of germinating more so than those that are buried. Light acts as an indicator of soil depth for seeds, allowing seeds near the surface to have higher germination than those deeply buried [35][36][37]. The light-requiring characteristic of L. apetalum seeds suggest that even though dormancy is broken, seeds can form a soil seed bank, to an extent, associated with low temperature inhibition in winter, to favor persistence of its populations in adverse environments.…”

Section: Discussionmentioning

confidence: 99%

Seed Biology of Lepidium apetalum (Brassicaceae), with Particular Reference to Dormancy and Mucilage Development

Zhang

Yin

et al. 2020

Plants

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Lepidium apetalum (Brassicaceae) is an annual or biennial weed widely distributed in Asia and Europe. The outer surface of L. apetalum seeds produces a large amount of mucilage. The primary aim of this study was to explore the dormancy characteristics and to determine how mucilage develops. The role of mucilage in water absorption/dehydration, the effects of after-ripening, gibberellin acid (GA3), cold stratification and seed coat scarification on germination, the role of mucilage in germination and seedling growth during drought, and the progress of mucilage production during seed development were investigated. The results indicate that the best temperature regime for germination was 10/20 °C. After-ripening, GA3 and seed coat scarification helped to break dormancy. Light promoted germination. Seedling growth of mucilaged seeds were significantly higher than those of demucilaged seeds at −0.606 and −1.027 MPa. Anatomical changes during seed development showed that mucilage was derived from the outer layer of the outer integument cells. Our findings suggest that seeds of L. apetalum exhibited non-deep physiological dormancy. The dormancy characteristics along with mucilage production give seeds of L. apetalum a competitive advantage over other species, and thus contribute to its potential as a weed. Effective control of this weed can be achieved by deep tillage.

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“…Previous study has shown that excessive burial depth reduced the permeability of shell sand, led to seed dormancy, and affected the formation of seedlings [25]. Deep burial decreased light intensity and temperature, both of which are unfavorable for seed germination and seedling emergence, although, seedling emergence does not vary between light and dark conditions for some plant seeds [26]. Light conditions have obvious differences in the morphological construction of unearthed seedlings [22,26].…”

Section: Discussionmentioning

confidence: 99%

Effects of shell sand burial on seedling emergence, growth and stoichiometry of Periploca sepium Bunge

Sun

Yang

et al. 2020

BMC Plant Biol

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Background: Sand burial plays an irreplaceable and unique role in the growth and distribution of vegetation on the Shell Dike Island in the Yellow River Delta. There are still some unknown on the effects of sand burial on the morphology, biomass, and especially the stoichiometry of Periploca sepium, as well as the relationship between these factors. Results: Shell sand burial depth had a significant influence on seedling emergence, growth, and biomass of P. sepium. Shallow sand burial shortened the emergence time and improved the emergence rate, morphological and biomass of P. sepium compared to deep burial and the control. Burial depth significantly affected the nitrogen (N) and phosphorus (P) contents of the leaves. With deep burial, the carbon/nitrogen (C/N) and carbon/phosphorus (C/P) ratios decreased firstly and then increased with depth, while the nitrogen/phosphorus ratio (N/P) presented the contrary trend. Correlation analysis showed that the stoichiometry of N/P was positively correlated to morphology and biomass of P. sepium at different burial depths. Structural equation model analysis revealed that N was the largest contributor to P. sepium biomass. Conclusions: Optimal burial depth is beneficial to the seedling emergence, growth and nutritional accumulation of P. sepium. Stoichiometry has an important influence on the morphological formation and biomass accumulation.

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Effect of light on seed germination and seedling shape of succulent species from Mexico

Cited by 59 publications

References 20 publications

Morphometry and Germination of Passovia pyrifolia, Struthanthus marginatus and Phoradendron mucronatum Diaspores

Morphometry and Germination of Passovia pyrifolia, Struthanthus marginatus and Phoradendron mucronatum Diaspores

Seed Biology of Lepidium apetalum (Brassicaceae), with Particular Reference to Dormancy and Mucilage Development

Effects of shell sand burial on seedling emergence, growth and stoichiometry of Periploca sepium Bunge

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