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Ornamental Plants Architectural Characteristics in Relation to Visual Ornamental plants architectural characteristics in relation to visual sensory attributes: a new approach on the rose bush for objective evaluation of the visual quality Morgan Garbez, R. Symoneaux, Etienne Belin, Y. Caraglio, Yann Chéné, N. Dones, Jean-Baptiste Durand, G. Hunault, D. Relion, M. Sigogne, et al. To cite this version: Morgan Garbez, R. Symoneaux, Etienne Belin, Y. Caraglio, Yann Chéné, et al.. Ornamental plants architectural characteristics in relation to visual sensory attributes: a new approach on the rose bush for objective evaluation of the visual quality. European Journal of Horticultural Science, Ulmer, 2018, 83 (3), pp.187-201. 10.17660/eJHS.2018/83.3.8. hal-01831318 HAL Id: hal-01831318 https://hal.archives-ouvertes.fr/hal-01831318 Submitted on 20 Aug 2018 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Eur. J. Hortic. Sci. 83(3), 187–201 | ISSN 1611-4426 print, 1611-4434 online | https://doi.org/10.17660/eJHS.2018/83.3.8 | © ISHS 2018 Original article – Thematic Issue German Society for Horticultural Science Ornamental plants architectural characteristics in relation to visual sensory attributes: a new approach on the rose bush for objective evaluation of the visual quality M. Garbez1,2, R. Symoneaux3, É. Belin4, Y. Caraglio5, Y. Chéné4, N. Donès6, J.-B. Durand7,8, G. Hunault9, D. Relion1, M. Sigogne1, D. Rousseau10 and G. Galopin1 1 IRHS, INRA, Agrocampus Ouest, Université d’Angers, Beaucouzé, France 2 Pépinières Desmartis, Bergerac, France 3 Unité de Recherche GRAPPE, Université Bretagne Loire, Ecole Supérieure d’Agricultures (ESA), INRA, Angers, France 4 Université d’Angers, Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), Angers, France 5 AMAP, CIRAD, CNRS, INRA, IRD, UM, Montpellier, France 6 PIAF, INRA, UCA, Clermont-Ferrand, France 7 Virtual Plants, Montpellier, France 8 Laboratoire Jean Kuntzmann, MISTIS, INRIA Grenoble – Rhône-Alpes, Saint Ismier, France 9 Université d’Angers, Laboratoire Hémodynamique, Interaction, Fibrose, et Invasivité Tumorale Hépatique (HIFIH), Angers, France 10 Université de Lyon, Centre de Recherche en Acquisition et Traitement de l’Image pour la Santé (CREATIS), Villeurbanne, France Summary Significance of this study Within ornamental horticulture context, visual What is already known on this subject? quality of plants is a critical criterion for consumers • Visual quality of ornamental plants is a key parameter looking for immediate decorative effect products. playing a major role in the purchase triggering for Studying links between architecture and its pheno- consumers. Nonetheless, it is a complex notion based typic plasticity in response to growing conditions and on the individual and subjective appreciation. the resulting plant visual appearance represents an interesting lever to propose a new approach for man- What are the new findings? aging product quality from specialized crops. Objec- • A new method to studying and modeling the tives of the present study were to determine whether relationships between ornamental plant architecture architectural components may be identified across and main visual components. The obtained models different growing conditions (1) to study the archi- enabled to identify architectural variables with good tectural development of a shrub over time; and (2) to predictive ability and especially relevant for explaining predict sensory attributes data characterizing multi- the visual appearance of the architecture of rose bush. ple visual traits of the plants. The approach addressed in this study stands on the sensory profile method What is the expected impact on horticulture? using a recurrent blooming modern rose bush (Rosa • Within ornamental horticulture context, visual quality hybrida ‘Radrazz’) presented in rotation using video of plants is an important criterion for consumers stimuli. Plants were cultivated under a shading gra- looking for immediate decorative effects products. dient in three distinct environments (natural condi- This work will make it possible to objectify the tions, under 55 and 75% shading net). Architecture relation between the architecture of the plant and the and video of the plants were recorded during three visual perception by the consumer. It’s a future tool to stages, from 5 to 15 months after plant multiplication. help innovation in ornamental horticulture. Except for visual traits at the scale of the organs, pan- el performance was highly satisfying for most of the sensory attributes listed. Strong correlations (Spear- man’s coefficient ranging from 0.72 to 0.98) were found between them and architectural variables ex- appearance to target processes of interest in order to tracted from phytomer to plant scale data. Acceptable optimize growing conditions or select the most fitting to very satisfying models were obtained (Q2 ranged genotypes across breeding programs, with respect to from 0.49 to 0.95, normalized RMSEP <17.3%) with contrasted consumer preferences. simple ordinary least squares regression and vari- able transformation to encompass non-linear rela- Keywords tionships. The proposed approach presents therefore architectural analysis, linear regression, Rosa hybrida, a powerful way to gain a better insight into the ar- chitecture of shrub plants together with their visual plant sensory profile, visual appearance, woody ornamental Volume 83 | Issue 3 | June 2018 187 Garbez et al. | Ornamental plants architectural characteristics in relation to visual sensory attributes Introduction sual traits is thus needed to investigate if putative underlying Visual quality of ornamental plants is a key parameter key biological processes could be targeted. This approach, playing a major role in the purchase triggering for consum- necessary to address visual quality of ornamental plants, ers (Townsley-Brascamp and Marr, 1994; Schreiner et al., - 2013; Ferrante et al., 2015). Nonetheless, it is a complex tributes is necessary on the one hand to analyze their rela- notion based on the individual and subjective appreciation tionscannot with remain the architectural empirical. Thus, components, identification the subject of visual of this at of the product design or appearance by a given individual. publication, and on the other hand to further understand the Thus, preferences are mainly related to aesthetical judg- preferences of the consumers. However, literature about re- ments, although, for objective or subjective reasons, there lations between perception of plant visual appearance traits and such architectural parameters for explaining consumer (Higginbotham, 1987; Creusen and Schoormans, 2005; Bou- preferences is still poorly documented (Scuderi et al., 2012). mazamay be et differencesal., 2010). or conflicts of judgment between people First studies on rose bushes demonstrated the high poten- Effects of growing practices evaluated on various plant tial of this approach through correlative studies either using parameters measured with destructive or contactless meth- - ods are rather well-documented (Ferrante et al., 2015). None- ber of visual descriptors selected from a sensory method or theless, in such studies, a plant with pleasant visual appear- pickedyoung plants,out from or UPOV addressing guideline for specificfor Rosa aims L. (Huché-Thélier a limited num et ance is too often seen as univocal and consumer preferences al., 2011; Crespel et al., 2013; Santagostini et al., 2014). as homogeneous. Therefore even if manual or automatized The main research objectives addressed in the present grading occurs, actually the likeliness to observe a simple re- study concern (1) the architectural characterization over lation and good concordance between visual quality grades time of the rose bush without any pruning so that all the po- tential basal sprouts can be taken into account, and (2) if ar- is small (Kohsel and Bennedsen, 2001; Garbez et al., 2016). Fromwith specific past decades, preferences quality and management expectations of offresh the horticulturconsumers,- visual traits and used for predicting them independently of al products, especially fruits and vegetables, strongly bene- plantchitectural age and components growing conditions. can be identified The same in relation rose bush to some cul- tivar was grown under three contrasted shading conditions 2006). Its recent application on the rose bush showed also to induce phenotypic variability. The architecture of the thefited strong from relevancethe sensory for evaluationproviding a science common (Meilgaard background et foral., plants was recorded three times over 15 months of cultiva- objectifying and harmonizing visual quality studies on orna- tion. In parallel, visual traits of the plants were characterized mental plants using real plants (Boumaza et al., 2009), single plant facet pictures (Boumaza et al., 2010; Huché-Thélier et in rotation as stimuli. The paper presents: (1) the sensory al., 2011; Santagostini et al., 2014), and virtual plants pre- through a sensory profile trial using videos presenting them- sented in rotation
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