Identifying Molecular Markers of Successful Graft Union Formation and Compatibility

Grafting is a technique used for millennia for vegetative propagation, especially in perennial fruit crops. This method, used on woody and herbaceous plants, can improve several agronomic characteristics, such as yield or vigor, as well as tolerance to biotic and abiotic stresses. However, some scio...

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Main Authors: Grégoire Loupit, Sarah Jane Cookson
Format: Article
Language:English
Published: Frontiers Media S.A. 2020-12-01
Series:Frontiers in Plant Science
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/fpls.2020.610352/full
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author Grégoire Loupit
Sarah Jane Cookson
author_facet Grégoire Loupit
Sarah Jane Cookson
author_sort Grégoire Loupit
collection DOAJ
description Grafting is a technique used for millennia for vegetative propagation, especially in perennial fruit crops. This method, used on woody and herbaceous plants, can improve several agronomic characteristics, such as yield or vigor, as well as tolerance to biotic and abiotic stresses. However, some scion/rootstock combinations suffer from poor graft compatibility, i.e., they are unable to form and/or sustain a successful graft union. Identifying symptoms of graft incompatibility is difficult because they are not always present in the first years after grafting and in most cases the causes of incompatibility are still poorly understood. Studies of changes in transcript abundance during graft union formation indicate that grafting responses are similar to responses to wounding and include the differential expression of genes related to hormone signaling, oxidative stress, formation of new vascular vessels, cell development, and secondary metabolites, in particular polyphenols. This review summarizes current knowledge of the changes in transcript abundance, redox status and metabolites accumulation during graft union formation and in cases of graft incompatibility. The goal of this review is to discuss the possibility of identifying marker transcripts, enzyme activities and/or metabolites of grafting success and graft compatibility which could be used to score grafting success for genetic research and in breeding programs. We highlight gaps in current knowledge and potential research directions in this field.
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spelling doaj.art-fae11961b30441f5bb3eeabdbef2c4772022-12-21T23:19:12ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2020-12-011110.3389/fpls.2020.610352610352Identifying Molecular Markers of Successful Graft Union Formation and CompatibilityGrégoire LoupitSarah Jane CooksonGrafting is a technique used for millennia for vegetative propagation, especially in perennial fruit crops. This method, used on woody and herbaceous plants, can improve several agronomic characteristics, such as yield or vigor, as well as tolerance to biotic and abiotic stresses. However, some scion/rootstock combinations suffer from poor graft compatibility, i.e., they are unable to form and/or sustain a successful graft union. Identifying symptoms of graft incompatibility is difficult because they are not always present in the first years after grafting and in most cases the causes of incompatibility are still poorly understood. Studies of changes in transcript abundance during graft union formation indicate that grafting responses are similar to responses to wounding and include the differential expression of genes related to hormone signaling, oxidative stress, formation of new vascular vessels, cell development, and secondary metabolites, in particular polyphenols. This review summarizes current knowledge of the changes in transcript abundance, redox status and metabolites accumulation during graft union formation and in cases of graft incompatibility. The goal of this review is to discuss the possibility of identifying marker transcripts, enzyme activities and/or metabolites of grafting success and graft compatibility which could be used to score grafting success for genetic research and in breeding programs. We highlight gaps in current knowledge and potential research directions in this field.https://www.frontiersin.org/articles/10.3389/fpls.2020.610352/fullgraftingtranscriptspolyphenolsgraft incompatibilityscion and rootstockoxidative stress
spellingShingle Grégoire Loupit
Sarah Jane Cookson
Identifying Molecular Markers of Successful Graft Union Formation and Compatibility
Frontiers in Plant Science
grafting
transcripts
polyphenols
graft incompatibility
scion and rootstock
oxidative stress
title Identifying Molecular Markers of Successful Graft Union Formation and Compatibility
title_full Identifying Molecular Markers of Successful Graft Union Formation and Compatibility
title_fullStr Identifying Molecular Markers of Successful Graft Union Formation and Compatibility
title_full_unstemmed Identifying Molecular Markers of Successful Graft Union Formation and Compatibility
title_short Identifying Molecular Markers of Successful Graft Union Formation and Compatibility
title_sort identifying molecular markers of successful graft union formation and compatibility
topic grafting
transcripts
polyphenols
graft incompatibility
scion and rootstock
oxidative stress
url https://www.frontiersin.org/articles/10.3389/fpls.2020.610352/full
work_keys_str_mv AT gregoireloupit identifyingmolecularmarkersofsuccessfulgraftunionformationandcompatibility
AT sarahjanecookson identifyingmolecularmarkersofsuccessfulgraftunionformationandcompatibility