Only seed size matters for germination in different populations of the dimorphic <i>Tragopogon pratensis</i> subsp. <i>pratensis</i> (Asteraceae)

Mölken, Tamara van; Jorritsma-Wienk, Linda D.; Hoek, Paul H. W. Van; Kroon, Hans de

doi:10.3732/ajb.92.3.432

Cited by 65 publications

(55 citation statements)

References 41 publications

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“…3). These results agree with those of Sinefu [32]; Mabhaudhi and Modi [33]; van Molken et al [31]. Cream seeds in this study are larger and heavier than light brown and brown seeds.…”

Section: Effect Of Seed Coat Colour On Germinationsupporting

confidence: 83%

“…2). These results were not in line with those of van Molken et al [31] who reported that darker seeds were heavier than lighter seeds. These results are in disagreement maybe due to the different species used in these studies.…”

Section: Thousand Grain Masscontrasting

confidence: 56%

“…Cream seeds in this study are larger and heavier than light brown and brown seeds. Even though large seeds are expected to have higher germination [31] due to abundant nutritional reserves available for germination [34], this was not the case in this study. It was also not the case in the study of Upadhaya et al [35] who further alluded that large seeds also have thick seed coat which hinders radicle protrusion and hence germination.…”

Section: Effect Of Seed Coat Colour On Germinationcontrasting

confidence: 48%

“…Moreover, seed coat colour and interaction between seed coat colour and scarification had a significant influence on field emergence. In another study, seed coat colour did not influence seedling establishment [31]. Seed coat colour in this study had the same effect on germination and emergence.…”

Section: Field Emergencementioning

confidence: 58%

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Overcoming the Physical Seed Dormancy in Bambara Groundnut (Vigna subterranea L.) by Scarification: A Seed Quality Study

Miya¹,

Modi²

2017

JAST-B

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Bambara groundnut (Vigna subterranea L.) is a neglected African crop legume with potential to play a significant role as a staple and industrial crop in sub-Saharan Africa. The crop can compete with Phaseolus vulgaris and Glycine max under harsh condition associated with climate change. However, there are some challenges associated with successful production of bambara groundnut, such as poor crop establishment due to physical seed dormancy. This study was conducted to investigate the effect of scarification on overcoming seed dormancy in bambara groundnut. Bambara groundnut landrace seeds were characterized by seed coat colour (cream, light brown and brown) in order to determine the effects of mechanical (sand paper) and chemical (sulphuric acid) seed scarification on germination and emergence. A completely randomized design with three replications was used. Thousand grain mass (TGM), mean germination time (MGT), germination vigour index (GVI), seedling root to shoot ratio, seedling dry mass and field emergence were determined. Thousand grain mass increased with the decrease in seed coat colour pigmentation. Brown seeds had the highest final germination and field emergence, and cream seeds had the least. Imposing chemical or mechanical scarification improved germination as compared to no scarification. However, seedling establishment was vigorous in seeds that were not scarified. Seed quality in bambara groundnut is highly influenced by scarification and seed coat colour. The practical implications of the study are that producers can use scarification to improve bambara groundnut germination, however further research through seed enhancements is still needed for seedling establishment under field conditions.

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“…3). These results agree with those of Sinefu [32]; Mabhaudhi and Modi [33]; van Molken et al [31]. Cream seeds in this study are larger and heavier than light brown and brown seeds.…”

Section: Effect Of Seed Coat Colour On Germinationsupporting

confidence: 83%

Section: Thousand Grain Masscontrasting

confidence: 56%

Section: Effect Of Seed Coat Colour On Germinationcontrasting

confidence: 48%

Section: Field Emergencementioning

confidence: 58%

See 2 more Smart Citations

Overcoming the Physical Seed Dormancy in Bambara Groundnut (Vigna subterranea L.) by Scarification: A Seed Quality Study

Miya¹,

Modi²

2017

JAST-B

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“…Van Mölken et al (2005), also found no relationship between seed color and germination in their work with Tragopagon pratensis, but they agree that color can be an adaptation to escape predation.…”

Section: Resultsmentioning

confidence: 99%

Descripción de semillas silvestres de Euphorbia strigosa Hook and Arn del estado de Nayarit, México

et al. 2017

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En México, Euphorbia strigosa se ha identificado como una especie con potencial ornamental, por su coloración y su porte pequeño (35 cm, se considera una versión enana de Euphorbia pulcherrima). La dificultad en la conservación de E. strigosa se encuentra en la gran variabilidad de sus semillas en función de las condiciones ambientales y genotípicas donde la especie crece. Por lo tanto, el objetivo del presente estudio fue describir las semillas de E. strigosa, de plantas silvestres del Estado de Nayarit, México (2013-2014). Se midieron variables grupales de peso de 1000 y 100 semillas, así como el número de semillas en 1 g y en 10 mL. Además, una muestra de 130 semillas de cada año se les evaluó individualmente variables físicas. Las semillas se clasifican en función de tres grados de luminosidad del color café (claro, medio y oscuro) y cuatro rangos de peso (3,0-8,0; 8,1-13,0: 13.1-18.0 y > 18,1 mg). Basado en la clasificación de los factores: año de colecta, luminosidad del color café y el peso, se formaron 22 subgrupos. En cada subgrupo se evaluó el porcentaje de germinación. Se presentaron diferencias significativas en todas las características evaluadas, lo que indica la diversidad morfogenética de las semillas colectadas.

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Variation in morphological traits affects dispersal and seedling emergence in dispersive diaspores of Geropogon hybridus

Chen

Giladi

2020

American J of Botany

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Premise Intraspecific variation in diaspore characteristics could affect various aspects of plant performance at the population, individual plant, and seed levels. We quantified variation in dispersal traits in a wind‐dispersed annual, Geropogon hybridus (Asteraceae), focusing on continuous morphological traits of dispersive diaspores and their relationships to dispersal ability and seedling emergence. Methods We measured the morphological traits, terminal velocity, and seedling emergence of 1140 seeds from 10 populations in two successive years. We assessed the variation in traits among three hierarchical levels of organization and between years, and quantified their effects on diaspore terminal velocity and seedling emergence. Results Diaspore morphological traits varied substantially at the population, plant, and diaspore levels. Variables of pappus geometry, especially pappus width and pappus opening angle, were consistent between years and were found to be the best predictors of diaspore terminal velocity and seedling emergence. There was a significant negative relationship between diaspore terminal velocity and seedling emergence. Conclusions The intraspecific variation in diaspore traits is sufficiently large to substantially allow a dispersal–dormancy trade‐off of individual diaspores. Our results support the hypothesis that traits of dispersive diaspores evolve in concert to select for increased dispersal potential, and provide an avenue to predict plant offspring performance through simply measured traits.

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Only seed size matters for germination in different populations of the dimorphic Tragopogon pratensis subsp. pratensis (Asteraceae)

Cited by 65 publications

References 41 publications

Overcoming the Physical Seed Dormancy in Bambara Groundnut (Vigna subterranea L.) by Scarification: A Seed Quality Study

Overcoming the Physical Seed Dormancy in Bambara Groundnut (Vigna subterranea L.) by Scarification: A Seed Quality Study

Descripción de semillas silvestres de Euphorbia strigosa Hook and Arn del estado de Nayarit, México

Variation in morphological traits affects dispersal and seedling emergence in dispersive diaspores of Geropogon hybridus

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