Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance

Detalhes bibliográficos
Autor(a) principal: Amaro, A. C. E. [UNESP]
Data de Publicação: 2019
Outros Autores: Macedo, A. C. [UNESP], Goto, R. [UNESP], Ono, E. O., Rodrigues, J. D., Nascimento, W. M., Silva, P. P., Rosseto, M.
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.17660/ActaHortic.2019.1249.29
http://hdl.handle.net/11449/245237
Resumo: Photosynthesis is directly proportional to light and the stomatal aperture reduces with the decrease in irradiance. The increase in irradiance reduces the respiration and photorespiration, besides increasing CO2 fixation. As grafting induces significant changes in the growth and development of the plant, the present work aimed to evaluate the response curve of the CO2 assimilation rate, as a function of PPFD (photosynthetic photon flux density) in grafted and non-grafted Japanese cucumber plants (Cucumis sativus L.). The study was performed in an experimental area of the FCA, UNESP, Botucatu-SP, Brazil, in greenhouse conditions. The response curve was obtained with the IRGA LI6400, reducing the PPFD of 2000 to 0 mu mol m(-2) s(-1) at intervals of 300 mu mol m(-2) s(-1) until 100 mu mol m(-2) s(-1), after which it was used at intervals of 50 mu mol m(-2) s(-1), 42 days after transplant, using four replicates of each type of plant. It was observed that in grafted plants the light compensation point was higher than in non-grafted ones (58.65 and 32.24 mu mol m(-2) s(-1), respectively), indicating that grafted plants require a higher amount of light than non-grafted plants to submit similar CO2 assimilation. Non-grafted plants showed a saturation tendency of photosynthesis by light in PPFD values above 1200 mu mol m(-2) s(-1), whereas the grafted plants showed it above 1500 mu mol m(-2) s(-1). These results indicated that grafting affected photosynthetic metabolism, and so the non-grafted plants have lower light compensation point and saturation point of photosynthesis by light than grafted plants. This suggests that grafted plants tend to tolerate higher radiance levels than non-grafted plants.
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spelling Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradianceCucumis sativus L.gas exchangegraftinglightphotosynthesisPhotosynthesis is directly proportional to light and the stomatal aperture reduces with the decrease in irradiance. The increase in irradiance reduces the respiration and photorespiration, besides increasing CO2 fixation. As grafting induces significant changes in the growth and development of the plant, the present work aimed to evaluate the response curve of the CO2 assimilation rate, as a function of PPFD (photosynthetic photon flux density) in grafted and non-grafted Japanese cucumber plants (Cucumis sativus L.). The study was performed in an experimental area of the FCA, UNESP, Botucatu-SP, Brazil, in greenhouse conditions. The response curve was obtained with the IRGA LI6400, reducing the PPFD of 2000 to 0 mu mol m(-2) s(-1) at intervals of 300 mu mol m(-2) s(-1) until 100 mu mol m(-2) s(-1), after which it was used at intervals of 50 mu mol m(-2) s(-1), 42 days after transplant, using four replicates of each type of plant. It was observed that in grafted plants the light compensation point was higher than in non-grafted ones (58.65 and 32.24 mu mol m(-2) s(-1), respectively), indicating that grafted plants require a higher amount of light than non-grafted plants to submit similar CO2 assimilation. Non-grafted plants showed a saturation tendency of photosynthesis by light in PPFD values above 1200 mu mol m(-2) s(-1), whereas the grafted plants showed it above 1500 mu mol m(-2) s(-1). These results indicated that grafting affected photosynthetic metabolism, and so the non-grafted plants have lower light compensation point and saturation point of photosynthesis by light than grafted plants. This suggests that grafted plants tend to tolerate higher radiance levels than non-grafted plants.Funda��o de Amparo � Pesquisa do Estado de S�o Paulo (FAPESP)UNESP, Sch Agron Sci FCA, Botucatu, SP, BrazilUNESP, Sch Agron Sci FCA, Botucatu, SP, BrazilInt Soc Horticultural ScienceUniversidade Estadual Paulista (UNESP)Amaro, A. C. E. [UNESP]Macedo, A. C. [UNESP]Goto, R. [UNESP]Ono, E. O.Rodrigues, J. D.Nascimento, W. M.Silva, P. P.Rosseto, M.2023-07-29T11:49:12Z2023-07-29T11:49:12Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject157-160http://dx.doi.org/10.17660/ActaHortic.2019.1249.29VI International Symposium on Seed, Transplant and Stand Establishment of Horticultural Crops. Leuven 1: Int Soc Horticultural Science, v. 1249, p. 157-160, 2019.0567-7572http://hdl.handle.net/11449/24523710.17660/ActaHortic.2019.1249.29WOS:000945552800029Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengVi International Symposium On Seed, Transplant And Stand Establishment Of Horticultural Cropsinfo:eu-repo/semantics/openAccess2023-07-29T11:49:13Zoai:repositorio.unesp.br:11449/245237Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:55:55.009950Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
title Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
spellingShingle Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
Amaro, A. C. E. [UNESP]
Cucumis sativus L.
gas exchange
grafting
light
photosynthesis
title_short Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
title_full Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
title_fullStr Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
title_full_unstemmed Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
title_sort Photosynthetic response curve of grafted and non-grafted Japanese cucumber plants in relation to irradiance
author Amaro, A. C. E. [UNESP]
author_facet Amaro, A. C. E. [UNESP]
Macedo, A. C. [UNESP]
Goto, R. [UNESP]
Ono, E. O.
Rodrigues, J. D.
Nascimento, W. M.
Silva, P. P.
Rosseto, M.
author_role author
author2 Macedo, A. C. [UNESP]
Goto, R. [UNESP]
Ono, E. O.
Rodrigues, J. D.
Nascimento, W. M.
Silva, P. P.
Rosseto, M.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (UNESP)
dc.contributor.author.fl_str_mv Amaro, A. C. E. [UNESP]
Macedo, A. C. [UNESP]
Goto, R. [UNESP]
Ono, E. O.
Rodrigues, J. D.
Nascimento, W. M.
Silva, P. P.
Rosseto, M.
dc.subject.por.fl_str_mv Cucumis sativus L.
gas exchange
grafting
light
photosynthesis
topic Cucumis sativus L.
gas exchange
grafting
light
photosynthesis
description Photosynthesis is directly proportional to light and the stomatal aperture reduces with the decrease in irradiance. The increase in irradiance reduces the respiration and photorespiration, besides increasing CO2 fixation. As grafting induces significant changes in the growth and development of the plant, the present work aimed to evaluate the response curve of the CO2 assimilation rate, as a function of PPFD (photosynthetic photon flux density) in grafted and non-grafted Japanese cucumber plants (Cucumis sativus L.). The study was performed in an experimental area of the FCA, UNESP, Botucatu-SP, Brazil, in greenhouse conditions. The response curve was obtained with the IRGA LI6400, reducing the PPFD of 2000 to 0 mu mol m(-2) s(-1) at intervals of 300 mu mol m(-2) s(-1) until 100 mu mol m(-2) s(-1), after which it was used at intervals of 50 mu mol m(-2) s(-1), 42 days after transplant, using four replicates of each type of plant. It was observed that in grafted plants the light compensation point was higher than in non-grafted ones (58.65 and 32.24 mu mol m(-2) s(-1), respectively), indicating that grafted plants require a higher amount of light than non-grafted plants to submit similar CO2 assimilation. Non-grafted plants showed a saturation tendency of photosynthesis by light in PPFD values above 1200 mu mol m(-2) s(-1), whereas the grafted plants showed it above 1500 mu mol m(-2) s(-1). These results indicated that grafting affected photosynthetic metabolism, and so the non-grafted plants have lower light compensation point and saturation point of photosynthesis by light than grafted plants. This suggests that grafted plants tend to tolerate higher radiance levels than non-grafted plants.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
2023-07-29T11:49:12Z
2023-07-29T11:49:12Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/conferenceObject
format conferenceObject
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.17660/ActaHortic.2019.1249.29
VI International Symposium on Seed, Transplant and Stand Establishment of Horticultural Crops. Leuven 1: Int Soc Horticultural Science, v. 1249, p. 157-160, 2019.
0567-7572
http://hdl.handle.net/11449/245237
10.17660/ActaHortic.2019.1249.29
WOS:000945552800029
url http://dx.doi.org/10.17660/ActaHortic.2019.1249.29
http://hdl.handle.net/11449/245237
identifier_str_mv VI International Symposium on Seed, Transplant and Stand Establishment of Horticultural Crops. Leuven 1: Int Soc Horticultural Science, v. 1249, p. 157-160, 2019.
0567-7572
10.17660/ActaHortic.2019.1249.29
WOS:000945552800029
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Vi International Symposium On Seed, Transplant And Stand Establishment Of Horticultural Crops
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 157-160
dc.publisher.none.fl_str_mv Int Soc Horticultural Science
publisher.none.fl_str_mv Int Soc Horticultural Science
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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