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Open AccessArticle

Integration of Phenotype and Hormone Data during Adventitious Rooting in Carnation (Dianthus caryophyllus L.) Stem Cuttings

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Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain
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Universidad Católica San Antonio de Murcia, Campus de los Jerónimos, 30107 Guadalupe, Spain
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CEBAS-CSIC, Campus Universitario de Espinardo, 30100 Murcia, Spain
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Departamento de Biología Vegetal, Universidad de Murcia, 30100 Murcia, Spain
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Dümmen Orange, 30890 Puerto Lumbreras, Spain
*
Author to whom correspondence should be addressed.
Plants 2019, 8(7), 226; https://doi.org/10.3390/plants8070226
Received: 29 May 2019 / Revised: 4 July 2019 / Accepted: 12 July 2019 / Published: 15 July 2019
(This article belongs to the Special Issue Adventitious Root Formation in Tree Species)
The rooting of stem cuttings is a highly efficient procedure for the vegetative propagation of ornamental plants. In cultivated carnations, an increased auxin level in the stem cutting base produced by active auxin transport from the leaves triggers adventitious root (AR) formation from the cambium. To provide additional insight into the physiological and genetic basis of this complex trait, we studied AR formation in a collection of 159 F1 lines derived from a cross between two hybrid cultivars (2003 R 8 and 2101-02 MFR) showing contrasting rooting performances. In three different experiments, time-series for several stem and root architectural traits were quantified in detail in a subset of these double-cross hybrid lines displaying extreme rooting phenotypes and their parental genotypes. Our results indicate that the water content and area of the AR system directly contributed to the shoot water content and shoot growth. Moreover, morphometric data and rooting quality parameters were found to be associated with some stress-related metabolites such as 1-aminocyclopropane-1-carboxylic acid (ACC), the ethylene precursor, and the conjugated auxin indol-3-acetic acid-aspartic acid (IAA-Asp). View Full-Text
Keywords: vegetative plant propagation; hormone profiling; root architectural traits; stress-related hormones; ACC; IAA-Asp; water content; shoot growth vegetative plant propagation; hormone profiling; root architectural traits; stress-related hormones; ACC; IAA-Asp; water content; shoot growth
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Justamante, M.S.; Acosta-Motos, J.R.; Cano, A.; Villanova, J.; Birlanga, V.; Albacete, A.; Cano, E.Á.; Acosta, M.; Pérez-Pérez, J.M. Integration of Phenotype and Hormone Data during Adventitious Rooting in Carnation (Dianthus caryophyllus L.) Stem Cuttings. Plants 2019, 8, 226.

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