Acta Physiologiae Plantarum

, 40:213 | Cite as

Assessment of a non-destructive method to estimate the leaf area of Armoracia rusticana

  • Susanna De MariaEmail author
  • Angelo Rita
  • Vincenzo Trotta
  • Anna Rita Rivelli
Original Article


The aim of the study was to analyze horseradish growth for developing a mathematical model to estimate the leaf area based on linear measurements of the leaf surface. Leaf area (LA), number, and morphometric characteristics of the leaves including lamina length (L) and width (W) were evaluated on two horseradish accessions (Cor and Mon) throughout a 2 year growing cycle. In both accessions, increased values of LA and leaf number were found by comparing the second with the first-growing season. Leaf development occurs along with variations in size and not in shape during the plant growth. The leaves are elliptical in shape but tend to be wider and bigger in Cor accession and tapered and similar to narrow ellipses in Mon showing different length/width relationship. Consequently, several regression models relating to the LA and L, W, L2, and W2 individually or in combination were fitted for each accession based on a set of 1000 leaves. The horseradish LA can be predicted based on either length or width alone. However, the regression linear model LA = aLW + b (LA = 0.71LW − 0.27 and LA = 0.76LW − 3.22 for Cor and Mon, respectively) provided the best LA estimation (R2 > 0.95). The validation of this latter model showed high correlation between LA measured and LA predicted in both accessions (R2 = 0.98). Considering the type of foliage of horseradish, the proposed model can be used to estimate the leaf area throughout the entire crop cycle.


Brassicaceae Horseradish Plant growth Leaf morphology Plant phenotyping 



The authors wish to thank Giuseppe Mercurio for the technical support provided during plant sampling and data collection.


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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2018

Authors and Affiliations

  1. 1.School of Agricultural, Forest, Food and Environmental SciencesUniversity of BasilicataPotenza (PZ)Italy
  2. 2.Department of ScienceUniversity of BasilicataPotenza (PZ)Italy

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