Manuel Jamilena

The ga3ox1b mutation reveals the crosstalk between gibberellin and other phytohormones in controlling the growth and development of female flowers in Cucurbita pepo

Keshav Kant Gautam, María Segura, Alicia García, Alejandro Castro‐Cegrí et autres

Cucurbita pepo is a monoecious species with female and male unisexual flowers on the same plant. The large size of its flowers makes this species a model for studying the regulation of sex determination and sex-associated developmental traits. Because male flowers appear …

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Genome-Wide Methylation and Transcriptomic Analyses Reveal Hormonal Crosstalk in Ethylene-Mediated Parthenocarpy of Zucchini

Alicia García, Flavio Gabrieli, María Segura, Alejandro Castro‐Cegrí et autres

Abstract Parthenocarpy is a valuable trait for greenhouse squash production, but the molecular basis of fruit set without pollination or fertilization remains unclear. The ethylene-insensitive etr2b mutation confers parthenocarpic fruit development, indicating that ethylene acts as a negative regulator of fruit set. …

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A Genome-Wide Association Study Reveals QTLs and Candidate Genes Associated with the Carotenoid Content in the Flesh of Cucurbita pepo L. Fruit

Anaïs Lopez, Alicia García, Alejandro Castro‐Cegrí, Álvaro Benítez et autres

Considering the importance of carotenoids in the human diet, their enhancement is a key trait in current breeding programs. This study assessed lutein, zeaxanthin, α-carotene, and β-carotene levels in the flesh of mature fruits from 257 global C. pepo accessions. Lutein and …

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A novel ABA insensitive mutant reveals the role of clade H CpPP2C-H1A of Cucurbita pepo in seed germination, stomata closure and water stress tolerance

Jessica Iglesias‐Moya, Sonsoles Alonso, Álvaro Benítez, Vanesa Eleonora Tossi et autres

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High throughput screening and evaluation of salt-tolerant mutants from an EMS collection of Cucurbita pepo

Sonsoles Alonso, Keshav Kant Gautam, Jessica Iglesias‐Moya, M.M. Rebolloso et autres

Salinity is a major environmental stress limiting crop growth and yield in many arid and semi-arid regions of the world. In this study, we used a germination-based selection method to screen an EMS collection of Cucurbita pepo, consisting of 3,751 M2 lines, …

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BSAseq analysis reveals two major QTLs contributing to postharvest cold tolerance in Cucurbita pepo

Alejandro Castro‐Cegrí, Alicia García, Francisco Palma, Cecilia Martínez et autres

Zucchini has a subtropical origin, therefore, physiological disorders such as chilling injury (CI) appear when the fruit is stored at low temperatures. This affects the quality and shelf life of these commodities. Cold tolerance throughout this period depends on the variety; Natura …

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RNA-Seq-based analysis of transcriptomic signatures elicited by mutations conferring salt tolerance in Cucurbita pepo

Keshav Kant Gautam, Sonsoles Alonso, Alicia García, Álvaro Benítez et autres

• Pairwise comparisons of transcriptomes of wild-type and salt-tolerant mutants reveal the molecular mechanisms behind salt tolerance in squash. • Brassinosteroid, ABA, ethylene, and JA biosynthesis genes like CpBZR1, CpTCH4–1, CpTCH4–2, CpCYP707A1, CpACO1–2 , and CpLOX3 were key regulators of salt tolerance …

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A QTL on chromosome 17 identified by Genome‐Wide Association Mapping controls postharvest cold tolerance of Cucurbita pepo L.

Alicia García, Alejandro Castro‐Cegrí, Alba Esperanza García López, Álvaro Benítez et autres

The worldwide cultivated Cucurbita pepo L. is one of the most diverse species in the plant kingdom. In this study, chilling tolerance over a wide range of cultivars was characterized to discover the allelic variants to improving the postharvest quality of the …

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Crosstalk between Ethylene, Jasmonate and ABA in Response to Salt Stress during Germination and Early Plant Growth in Cucurbita pepo

Sonsoles Alonso, Keshav Kant Gautam, Jessica Iglesias‐Moya, Cecilia Martínez et autres

The crosstalk of phytohormones in the regulation of growth and development and the response of plants to environmental stresses is a cutting-edge research topic, especially in crop species. In this paper, we study the role and crosstalk between abscisic acid (ABA), ethylene …

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Jasmonate-insensitive mutant jar1b prevents petal elongation and flower opening coupling with parthenocarpic fruit development in Cucurbita pepo

Keshav Kant Gautam, Sonsoles Alonso, Raúl Pasadas, José María García‐Mina et autres

Jasmonates are growth regulators that play a key role in flower development, fruit ripening, root growth, and plant defence. The study explores the coordination of floral organ maturation to ensure proper flower opening for pollination and fertilization. A new mutant (jar1b) was …

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The transcription factor CpMYB62 controls the genetic network that leads to the determination of female flowers in Cucurbita pepo

Alicia García, Germán Gamarra, Álvaro Benítez, Jessica Iglesias‐Moya et autres

Abstract In monoecious species, female flowering constitutes the developmental process that determines the onset and production of fruit and is therefore closely related to crop yield. This article presents the identification and phenotypic and molecular characterization of myb62, an ethylmethane sulfonate loss-of-function …

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Structural and functional characterization of genes PYL-PP2C-SnRK2s in the ABA signalling pathway of Cucurbita pepo

Jessica Iglesias‐Moya, Álvaro Benítez, Sonsoles Alonso, Dolores Garrido et autres

BACKGROUND: The core regulation of the abscisic acid (ABA) signalling pathway comprises the multigenic families PYL, PP2C, and SnRK2. In this work, we conducted a genome-wide study of the components of these families in Cucurbita pepo. RESULTS: The bioinformatic analysis of the …

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