Rootstock Affects Floral Induction in Citrus Engaging the Expression of the FLOWERING LOCUS T (CiFT)

Bennici, Stefania; Casas, Giuseppina Las; Distefano, Gaetano; Gentile, Alessandra; Lana, Giuseppe; Guardo, Mario Di; Nicolosi, Elisabetta; Malfa, Stefano La; Continella, Alberto

doi:10.3390/agriculture11020140

Cited by 7 publications

(2 citation statements)

References 65 publications

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“…While the higher level of acidity recorded for FUR was correlated with the downregulation of a gene that activates the degradation of citrates. Not much is known about the effects of rootstock at the molecular level; however, recent advances have shown that the use of a rootstock can affect scion gene regulation [63,64]. Moreover, it seems that scion gene expression may be induced by the movement of proteins and small RNA across the graft junction [65,66].…”

Section: Discussionmentioning

confidence: 99%

Molecular Insights into the Effects of Rootstocks on Maturation of Blood Oranges

et al. 2021

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Rootstock choice has important effects on the horticultural and pathological traits of the citrus cultivars. Thus, the scion/rootstock combination can affect tree vigour, nutrition, and stress resistance; it can also have positive influences on the fruit quality traits. Although the study of rootstock effects has been a relevant research topic in citrus for many years, the main body of such study has been conducted at the biochemical level, while little effort has been directed to the determination of the rootstock influences at the molecular level. A comparative study of three combinations of scion and rootstock shows a positive correlation between the regulation of the fruit quality-related genes and the accumulations of bioactive compounds, as well as with acid degradation. Monitoring the anthocyanin accumulation during ripening shows the scion/rootstock combination can increase anthocyanin synthesis in the fruit, as well as vitamin C accumulation and acid degradation. Our results show that the rootstock genotype can exert important influences on citrus fruit quality by affecting gene expression in the scion. New insights into the molecular interactions between scion and rootstock may help unravel the systems through which rootstocks exert their influences on the regulatory networks in the scion, so as to influence relevant agronomic traits. This information should result in an improved rootstock breeding selection and definition of scion/rootstock combinations to enhance fruit quality traits.

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Section: Discussionmentioning

confidence: 99%

Molecular Insights into the Effects of Rootstocks on Maturation of Blood Oranges

et al. 2021

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“…A more in-depth study was developed by Bennici et al (2021) who registered significantly higher flowering intensity in "Tarocco Scirè" sweet orange when grafted onto "C35" citrange than onto "Swingle citrumelo" rootstock. This effect paralleled CiFT2 expression during the inductive period, regardless of the fruit load; the authors concluded that the effect of the interaction cultivar/rootstocks on flowering intensity is mediated by the upregulation of CiFT2 gene.…”

Section: Rootstockmentioning

confidence: 99%

Advances in Citrus Flowering: A Review

et al. 2022

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Citrus are polycarpic and evergreen species that flower once in spring or several times a year depending on the genotype and the climatic conditions. Floral induction is triggered by low temperature and water-deficit stress and occurs 2–3 months before bud sprouting, whereas differentiation takes place at the same time as sprouting. The induced buds develop single flowers or determinate inflorescences, so that vegetative growth is required at the axillary buds to renew the polycarpic habit. The presence of fruits inhibits sprouting and flower induction from nearby axillary buds in the current season. In some species and cultivars, this results in low flowering intensity the following spring, thus giving rise to alternate bearing. A number of key flowering genes act in the leaf (CiFT3, CcMADS19, etc.) or in the bud (CsLFY, CsTFL1, etc.) to promote or inhibit both flowering time and reproductive meristem identity in response to these climatic factors, the fruit dominance, or the age of the plant (juvenility). The expression of some of these genes can be modified by gibberellin treatments, which reduce bud sprouting and flowering in adult trees, and constitute the main horticultural technique to control flowering in citrus. This review presents a comprehensive view of all aspects of the flowering process in citrus, converging the research published during the past half century, which focused on plant growth regulators and the nutritional source-sink relationships and guided research toward the study of gene transcription and plant transformation, and the advances made with the development of the tools of molecular biology published during the current century.

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Interactions between rootstock and scion during grafting and their molecular regulation mechanism

Liu

Zhang

et al. 2023

Scientia Horticulturae

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Rootstock Affects Floral Induction in Citrus Engaging the Expression of the FLOWERING LOCUS T (CiFT)

Cited by 7 publications

References 65 publications

Molecular Insights into the Effects of Rootstocks on Maturation of Blood Oranges

Molecular Insights into the Effects of Rootstocks on Maturation of Blood Oranges

Advances in Citrus Flowering: A Review

Interactions between rootstock and scion during grafting and their molecular regulation mechanism

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