Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud

In many fruit trees, heavy fruit load in one year reduces flowering in the following year, creating a biennial fluctuation in yield termed alternate bearing (AB). In subtropical trees, where flowering induction is mostly governed by the accumulation of chilling hours, fruit load is thought to genera...

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Autores: Haim, Dor, Shalom, Liron, Simhon, Yasmin, Shlizerman, Lyudmila, Kamara, Itzhak, Morozov, Michael, Albacete, Alfonso, Rivero, Rosa M., Sadka, Avi
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2021
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/254011
Acceso en línea:http://hdl.handle.net/10261/254011
Access Level:acceso abierto
Palabra clave:Alternate bearing
Auxin
Citrus
Defruiting
Fruit load
Fruit tree
Indoleacetic acid
Olive
Polar auxin transport
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spelling Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the budFruit presence induces polar auxin transport in citrus and olive stem and represses hormone release from the budHaim, DorShalom, LironSimhon, YasminShlizerman, LyudmilaKamara, ItzhakMorozov, MichaelAlbacete, AlfonsoRivero, Rosa M.Sadka, AviAlternate bearingAuxinCitrusDefruitingFruit loadFruit treeIndoleacetic acidOlivePolar auxin transportIn many fruit trees, heavy fruit load in one year reduces flowering in the following year, creating a biennial fluctuation in yield termed alternate bearing (AB). In subtropical trees, where flowering induction is mostly governed by the accumulation of chilling hours, fruit load is thought to generate a signal (AB signal) that blocks the perception of cold induction. Fruit removal during a heavy-fruit-load year is effective at inducing flowering only if performed one to a few months before the onset of the flowering induction period. We previously showed that following fruit removal, the content of the auxin indoleacetic acid (IAA) in citrus buds is reduced, suggesting that the hormone plays a role in the AB signal. Here, we demonstrate that fruit presence generates relatively strong polar auxin transport in citrus and olive stems. Upon fruit removal, polar auxin transport is reduced and allows auxin release from the bud. Furthermore, using immunolocalization, hormone, and gene expression analyses, we show that in citrus, IAA level in the bud and specifically in the apical meristem is reduced upon fruit removal. Overall, our data provide support for the notion that fruit presence generates an auxin signal in the bud, which may affect flowering induction.This research was supported by the Research Fund of the Chief Scientist of the Ministry of Agriculture and Rural Development, Israel (grant no. 20-10-0058)Oxford University PressMinistry of Agriculture & Rural Development (Israel)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/254011reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1093/jxb/eraa590Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2540112026-05-22T06:33:51Z
dc.title.none.fl_str_mv Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
Fruit presence induces polar auxin transport in citrus and olive stem and represses hormone release from the bud
title Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
spellingShingle Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
Haim, Dor
Alternate bearing
Auxin
Citrus
Defruiting
Fruit load
Fruit tree
Indoleacetic acid
Olive
Polar auxin transport
title_short Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
title_full Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
title_fullStr Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
title_full_unstemmed Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
title_sort Alternate bearing in fruit trees: fruit presence induces polar auxin transport in citrus and olive stem and represses IAA release from the bud
dc.creator.none.fl_str_mv Haim, Dor
Shalom, Liron
Simhon, Yasmin
Shlizerman, Lyudmila
Kamara, Itzhak
Morozov, Michael
Albacete, Alfonso
Rivero, Rosa M.
Sadka, Avi
author Haim, Dor
author_facet Haim, Dor
Shalom, Liron
Simhon, Yasmin
Shlizerman, Lyudmila
Kamara, Itzhak
Morozov, Michael
Albacete, Alfonso
Rivero, Rosa M.
Sadka, Avi
author_role author
author2 Shalom, Liron
Simhon, Yasmin
Shlizerman, Lyudmila
Kamara, Itzhak
Morozov, Michael
Albacete, Alfonso
Rivero, Rosa M.
Sadka, Avi
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministry of Agriculture & Rural Development (Israel)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Alternate bearing
Auxin
Citrus
Defruiting
Fruit load
Fruit tree
Indoleacetic acid
Olive
Polar auxin transport
topic Alternate bearing
Auxin
Citrus
Defruiting
Fruit load
Fruit tree
Indoleacetic acid
Olive
Polar auxin transport
description In many fruit trees, heavy fruit load in one year reduces flowering in the following year, creating a biennial fluctuation in yield termed alternate bearing (AB). In subtropical trees, where flowering induction is mostly governed by the accumulation of chilling hours, fruit load is thought to generate a signal (AB signal) that blocks the perception of cold induction. Fruit removal during a heavy-fruit-load year is effective at inducing flowering only if performed one to a few months before the onset of the flowering induction period. We previously showed that following fruit removal, the content of the auxin indoleacetic acid (IAA) in citrus buds is reduced, suggesting that the hormone plays a role in the AB signal. Here, we demonstrate that fruit presence generates relatively strong polar auxin transport in citrus and olive stems. Upon fruit removal, polar auxin transport is reduced and allows auxin release from the bud. Furthermore, using immunolocalization, hormone, and gene expression analyses, we show that in citrus, IAA level in the bud and specifically in the apical meristem is reduced upon fruit removal. Overall, our data provide support for the notion that fruit presence generates an auxin signal in the bud, which may affect flowering induction.
publishDate 2021
dc.date.none.fl_str_mv 2021
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Preprint
info:eu-repo/semantics/submittedVersion
format article
status_str submittedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/254011
url http://hdl.handle.net/10261/254011
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1093/jxb/eraa590
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Oxford University Press
publisher.none.fl_str_mv Oxford University Press
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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