What are seedless table grapes?
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/34737 |
Resumo: | Grapes are one of the most commonly produced fruit crops in the world and an important fruit commodity that allows good profits to producers. According to their characteristics, grapes can be considered for different uses: wine production (varieties with higher acidity and moderate sugar content), table grapes for fresh consumption (varieties with low acidity, low sugar, and specific standards of size, color, and shape), and raisins (varieties with low acidity and high sugar). In the last years cultivation and consumption of table grapes (Vitis vinifera L.) has increased considerably, mainly due to seedless varieties. Consumers appreciate the absence of seeds and are willing to pay more for sweeter and more firm seedless grapes. However, for many people the term “seedless” has a negative connotation, associated with negative health effects or even genetic manipulation. Seedless grapes exist naturally or may be manipulated by plant breeders without using genetic engineering techniques. Is possible to distinguish two mechanisms of seedlessness: parthenocarpy (when the ovary can develop without fertilization of the ovum) and stenospermocarpy (embryo abortion occurs after fertilization, and partially developed seeds or traces of seed are visible). Shelf-life of seedless grapes is expected to be longer than seeded fruits, because seeds produce hormones that activate senescence. The current table grapes breeding programmes are designed to obtain varieties with good characteristics and mandatorily seedless. So, the absence of seeds, shape, colour, skin thickness, resistance against diseases and pests, ability to be transported without damage and shelf-life are the main criteria to select new varieties. However, those who think that these new seedless table grape varieties are a new development, you are mistaken! There are records of this type of grapes since the 19th century. The most widely commercialized seedless table grapes varieties in the world are Thompson seedless (first seedless variety cultivated in the world), Crimson and Autumn Royal. In recent years, the post-harvest research group at the University of Évora has developed several works, in partnership with regional enterprises, in the characterization and quality evaluation of several varieties of seedless table grapes. This work was supported by Portuguese National Funds through FCT – Fundação para a Ciência e a Tecnologia under Project UIDB/05183/2020 (MED). S. Ricardo-Rodrigues acknowledges a PhD grant from FCT (2021.07663.BD). |
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What are seedless table grapes?table grapesseedlessGrapes are one of the most commonly produced fruit crops in the world and an important fruit commodity that allows good profits to producers. According to their characteristics, grapes can be considered for different uses: wine production (varieties with higher acidity and moderate sugar content), table grapes for fresh consumption (varieties with low acidity, low sugar, and specific standards of size, color, and shape), and raisins (varieties with low acidity and high sugar). In the last years cultivation and consumption of table grapes (Vitis vinifera L.) has increased considerably, mainly due to seedless varieties. Consumers appreciate the absence of seeds and are willing to pay more for sweeter and more firm seedless grapes. However, for many people the term “seedless” has a negative connotation, associated with negative health effects or even genetic manipulation. Seedless grapes exist naturally or may be manipulated by plant breeders without using genetic engineering techniques. Is possible to distinguish two mechanisms of seedlessness: parthenocarpy (when the ovary can develop without fertilization of the ovum) and stenospermocarpy (embryo abortion occurs after fertilization, and partially developed seeds or traces of seed are visible). Shelf-life of seedless grapes is expected to be longer than seeded fruits, because seeds produce hormones that activate senescence. The current table grapes breeding programmes are designed to obtain varieties with good characteristics and mandatorily seedless. So, the absence of seeds, shape, colour, skin thickness, resistance against diseases and pests, ability to be transported without damage and shelf-life are the main criteria to select new varieties. However, those who think that these new seedless table grape varieties are a new development, you are mistaken! There are records of this type of grapes since the 19th century. The most widely commercialized seedless table grapes varieties in the world are Thompson seedless (first seedless variety cultivated in the world), Crimson and Autumn Royal. In recent years, the post-harvest research group at the University of Évora has developed several works, in partnership with regional enterprises, in the characterization and quality evaluation of several varieties of seedless table grapes. This work was supported by Portuguese National Funds through FCT – Fundação para a Ciência e a Tecnologia under Project UIDB/05183/2020 (MED). S. Ricardo-Rodrigues acknowledges a PhD grant from FCT (2021.07663.BD).2023-02-24T16:05:52Z2023-02-242022-12-12T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/34737http://hdl.handle.net/10174/34737porRicardo-Rodrigues, S., Laranjo, M., Elias, M., Agulheiro-Santos, A.C. 2022. New and sustainable trends in food packaging: edible packaging. Encontro de Estudantes de Doutoramento em Ambiente e Agricultura. Universidade de Évora. 12 e 13 de dezembro 2022. Evora. ISBN: 978-972-778-298-7naonaosimsirr@uevora.ptmlaranjo@uevora.ptagostinho_p_29@hotmail.commir@uevora.ptacsantos@uevora.pt210Ricardo-Rodrigues, S.Laranjo, M.Serranito, M.I.Rouxinol, A.C.Agulheiro-Santosinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:37:28Zoai:dspace.uevora.pt:10174/34737Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:23:12.077497Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
What are seedless table grapes? |
title |
What are seedless table grapes? |
spellingShingle |
What are seedless table grapes? Ricardo-Rodrigues, S. table grapes seedless |
title_short |
What are seedless table grapes? |
title_full |
What are seedless table grapes? |
title_fullStr |
What are seedless table grapes? |
title_full_unstemmed |
What are seedless table grapes? |
title_sort |
What are seedless table grapes? |
author |
Ricardo-Rodrigues, S. |
author_facet |
Ricardo-Rodrigues, S. Laranjo, M. Serranito, M.I. Rouxinol, A.C. Agulheiro-Santos |
author_role |
author |
author2 |
Laranjo, M. Serranito, M.I. Rouxinol, A.C. Agulheiro-Santos |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Ricardo-Rodrigues, S. Laranjo, M. Serranito, M.I. Rouxinol, A.C. Agulheiro-Santos |
dc.subject.por.fl_str_mv |
table grapes seedless |
topic |
table grapes seedless |
description |
Grapes are one of the most commonly produced fruit crops in the world and an important fruit commodity that allows good profits to producers. According to their characteristics, grapes can be considered for different uses: wine production (varieties with higher acidity and moderate sugar content), table grapes for fresh consumption (varieties with low acidity, low sugar, and specific standards of size, color, and shape), and raisins (varieties with low acidity and high sugar). In the last years cultivation and consumption of table grapes (Vitis vinifera L.) has increased considerably, mainly due to seedless varieties. Consumers appreciate the absence of seeds and are willing to pay more for sweeter and more firm seedless grapes. However, for many people the term “seedless” has a negative connotation, associated with negative health effects or even genetic manipulation. Seedless grapes exist naturally or may be manipulated by plant breeders without using genetic engineering techniques. Is possible to distinguish two mechanisms of seedlessness: parthenocarpy (when the ovary can develop without fertilization of the ovum) and stenospermocarpy (embryo abortion occurs after fertilization, and partially developed seeds or traces of seed are visible). Shelf-life of seedless grapes is expected to be longer than seeded fruits, because seeds produce hormones that activate senescence. The current table grapes breeding programmes are designed to obtain varieties with good characteristics and mandatorily seedless. So, the absence of seeds, shape, colour, skin thickness, resistance against diseases and pests, ability to be transported without damage and shelf-life are the main criteria to select new varieties. However, those who think that these new seedless table grape varieties are a new development, you are mistaken! There are records of this type of grapes since the 19th century. The most widely commercialized seedless table grapes varieties in the world are Thompson seedless (first seedless variety cultivated in the world), Crimson and Autumn Royal. In recent years, the post-harvest research group at the University of Évora has developed several works, in partnership with regional enterprises, in the characterization and quality evaluation of several varieties of seedless table grapes. This work was supported by Portuguese National Funds through FCT – Fundação para a Ciência e a Tecnologia under Project UIDB/05183/2020 (MED). S. Ricardo-Rodrigues acknowledges a PhD grant from FCT (2021.07663.BD). |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-12-12T00:00:00Z 2023-02-24T16:05:52Z 2023-02-24 |
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info:eu-repo/semantics/publishedVersion |
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conferenceObject |
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publishedVersion |
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http://hdl.handle.net/10174/34737 http://hdl.handle.net/10174/34737 |
url |
http://hdl.handle.net/10174/34737 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Ricardo-Rodrigues, S., Laranjo, M., Elias, M., Agulheiro-Santos, A.C. 2022. New and sustainable trends in food packaging: edible packaging. Encontro de Estudantes de Doutoramento em Ambiente e Agricultura. Universidade de Évora. 12 e 13 de dezembro 2022. Evora. ISBN: 978-972-778-298-7 nao nao sim sirr@uevora.pt mlaranjo@uevora.pt agostinho_p_29@hotmail.com mir@uevora.pt acsantos@uevora.pt 210 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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