Modeling the Arabidopsis seed shape by a cardioid: Efficacy of the adjustment with a scale change with factor equal to the Golden Ratio and analysis of seed shape in ethylene mutants

Cervantés, Emilio; Martín, José Javier; Ardanuy, Ramón; Diego, Juana Gutiérrez de; Tocino, Ángel

doi:10.1016/j.jplph.2009.09.013

Cited by 46 publications

(66 citation statements)

References 17 publications

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“…Modern methods of scanning technology and image analysis algorithms (Herridge et al, 2011;Tanabata et al, 2012) allow rapid measurement of seed dimensions in a large Recently seed shape was described in the model plant Arabidopsis and in the model legumes Lotus japonicus and Medicago truncatula, based on their similarity to a cardioid curve (Cervantes et al, 2010(Cervantes et al, , 2012. In ecological terms the model plants belong to the "r" strategy (Begon et al, 2005), having short life cycles, production of large amounts of seeds, and simple morphological features.…”

Section: Discussionmentioning

confidence: 99%

“…Quantitative morphology may be based on comparison with geometric models (Keefe and Davis, 2010). Quantitative morphological analysis applied to Arabidopsis, Lotus and Medicago revealed the similarity of seeds of these model plants to a cardioid curve (Cervantes et al, 2010(Cervantes et al, , 2012. A geometric model based on similarity to a cardioid curve allowed comparison between varieties and mutants in seeds of these model species, opening the way to quantitative analysis of seed morphology.…”

Section: Introductionmentioning

confidence: 99%

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Intraspecific Variability of Seed Morphology in Capparis Spinosa L.

Saadaoui¹,

Gómez²,

Cervantés³

2013

Acta Biologica Cracoviensia Series Botanica

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Morphological description of seeds is a required step for analysis of biodiversity in natural populations and may give clues to adaptive strategies in species evolution. A cardioid is the curve described by a point of one circumference rolling around another circumference of equal radius. Models based on adjustment of seed shape with cardioid curves have been described for Arabidopsis thaliana and the model legumes Lotus japonicus and Medicago truncatula. In this work the model is applied to analyze seed morphology in populations of two subspecies of Capparis spinosa growing in Tunisia. Adjustment of seed images to cardioid curves, followed by statistical analysis of similarity in the complete images as well as in each of four quadrants, allows an accurate description of seed shape. The results show differences in morphology between subspecies. Seeds of subsp. rupestris present higher diversity of shape than seeds of subsp. spinosa. This may indicate primitiveness of C. subsp. rupestris seeds, associated with nonspecialization. The results are discussed in relation to the ecological strategies of both subspecies in their evolution.K Ke ey y w wo or rd ds s: : Adaptation, biodiversity, cardioid curve, ecology, morphometry, Capparis spinosa. ACTA BIOLOGICA CRACOVIENSIA Series Botanica 55

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intraspecific Variability of Seed Morphology in Capparis Spinosa L.

Saadaoui¹,

Gómez²,

Cervantés³

2013

Acta Biologica Cracoviensia Series Botanica

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“…Morphological analysis based in the comparison with geometric objects is useful to characterize the seeds in plant families and for the determination of taxonomic relationships of species and subspecies. The shape of seeds in model species was quantified by comparison with a cardioid (Cervantes et al, 2010;Cervantes et al, 2012) thus allowing to accurately measure changes in seed shape in mutants, during development or in response to environmental conditions or stress situations (Martín et al, 2014). In addition comparison of seed images with geometric figures allows the identification of features between subspecies and varieties (Saadaoui et al, 2013), changes to growth conditions (Saadaoui et al, 2015) or particular climatic adaptations (Martín Gómez et al, 2016).…”

Section: Olea Europaea Trees Spread In the Mediterraneanmentioning

confidence: 99%

Stone diversity in wild and cultivated olive trees (Olea europaea L.)

Hannachi¹,

Gómez²,

Saadaoui³

et al. 2017

Dendrobiology

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Abstract:The olive tree is represented in Tunisia by two varieties: var. sylvestris (wild olive trees) and var. europaea (cultivated olive trees including diverse cultivars). Seed (stone) size and shape analysis may provide the basis for relationships between varieties and cultivars as well as to study the responses to environmental conditions. A semi-automated method of image analysis allows to obtain data related with magnitudes descriptive of stone size and shape and to compare between wild and cultivated olives. Also, the effect of bioclimate on size and shape was analyzed in some cultivars. Stone size and shape presents high variability. In cultivated trees stones are larger. Mean seed image area is 0.38 and 0.75 cm² for wild and cultivated plants respectively. Roundness and circularity were compared as to their potential to define seed shape. Mean values were higher for circularity, but roundness is more variable reaching higher values in some individuals and varieties. Roundness is more useful to compare seed shape variations. In addition, climate factors affect the stone characteristics in cultivars; those of sub-humid region having larger stones. Phenotypic parameters of stone are discriminating parameters for the analysis of intra-specific, intra-varieties and intra-cultivars variability in Olea europaea.

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“…The ratio was chosen after measuring the ratios between axes in a sample of seeds (Martín-Gómez et al 2016). J index was defined previously for quantification of Arabidopsis Heynh seed shape in comparison to a cardioid (Cervantes et al 2010) and here is used to measure the adjustment of seed shape to the ellipse. To obtain J index, composed images containing an ellipse and the seed ( Figure 2) were elaborated for each seed with the software Corel PaintShop Pro X5.…”

Section: Methodsmentioning

confidence: 99%

“…The approach has been developed in the model plant (Arabidopsis thaliana (L.) Heynh., Cervantes et al 2010) as well as in the model legumes, Lotus japonicus and Medicago truncatula (Cervantes et al 2012). In Capparis spinosa L. the comparison of seed images with the cardioid was helpful to describe differences between two subspecies.…”

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confidence: 99%

Genetic variation and seed yield in Tunisian castor bean (<em>Ricinus communis</em> L.)

Saadaoui¹,

Martín-Gómez²,

Ghazel³

et al. 2017

Bot. Sci.

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Background and hypothesis: Castor bean (Ricinus communis) is spontaneous in Tunisia with a wide geographical distribution. To study seed morphology we introduced J index as the percent of similarity of seed images to an ovoid. Reduced seed size, J index and color intensity were observed in the population grown in the desert (Martín Gómez et al. 2016). Our objective is to analyze the variability in castor bean grown from seeds obtained from different geographic origins, to describe morphotypes and to find phenotypic parameters to select productive populations. Data description, mathematical model, study site and methods: Seeds collected from twelve populations in 12 Tunisian sites (4 bioclimatic regions) were sown in the experimental field of INRGREF in Gabes (Tunisia). After 10 months, morphological and agronomic characteristics of plants were measured. Morphological traits of seeds were analyzed. Results: Three groups were obtained. The first represented by a single population (northern Tunisia) is characterized by small leaves, large fruit, small seed and early flowering. The second group includes nine populations with intermediate values for fruit and seed dimensions. The third group characterized by reduced fruit length and elevated values of seed length and width. Seed yield varied between populations. Conclusions: Some features of seeds were maintained from the parental generation. Reduced size and color intensity with increased roundness values were maintained in the seeds of the Saharan region. J index values, reflecting the morphological similarity with an ovoid, increased in relation to the previous generation, in general as in particular in the seeds of the Saharan region. Keywords: Ricinus communis, diversity, morphology, seed yield, aborted seeds. Variación genética y rendimiento de las semillas en plantas de ricino (Ricinus communis L.) cultivadas en Túnez ResumenAntecedentes e hipótesis: El ricino (Ricinus communis) es espontáneo en Túnez con una amplia distribución geográfica. Para estudiar la morfología de la semilla introdujimos el índice J como el porcentaje de similitud de las imágenes de semillas con un ovoide. Se observó un menor tamaño, índice J e intensidad de color en semillas de la población crecida en el desierto (Martín Gómez et al., 2016). Nuestro objetivo es analizar la variabilidad en cultivos de ricino a partir de semillas obtenidas de diferentes orígenes geográfi-cos, describir morfotipos y encontrar parámetros fenotípicos para seleccionar poblaciones productivas. Descripción de datos y métodos: Se sembraron semillas de doce poblaciones en 12 localidades (4 regiones bioclimáticas) en el campo experimental del INRGREF en Gabes (Túnez). Después de 10 meses, se midieron las características morfológicas y agronómicas de las plantas y se analizaron los rasgos morfológicos de las semillas. Resultados: Se obtuvieron tres grupos. El primero representado por una sola población (norte de Túnez) se caracteriza por hojas pequeñas, frutos grandes, semillas pequeñas y floración tempran...

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Modeling the Arabidopsis seed shape by a cardioid: Efficacy of the adjustment with a scale change with factor equal to the Golden Ratio and analysis of seed shape in ethylene mutants

Cited by 46 publications

References 17 publications

Intraspecific Variability of Seed Morphology in Capparis Spinosa L.

Intraspecific Variability of Seed Morphology in Capparis Spinosa L.

Stone diversity in wild and cultivated olive trees (Olea europaea L.)

Genetic variation and seed yield in Tunisian castor bean (<em>Ricinus communis</em> L.)

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