Abstract
Lisianthus (Eustoma grandiflorum) is a cut flower grown due to the wide diversity of colors and longevity in the post-harvest. The leaf area measurement is fundamental in plants because the leaves are directly related to several processes such as transpiration, radiation interception and CO2 fixation that enable the plant to grow. The objective of the work was to determine an allometric equation for estimating the leaf area of lisianthus from linear dimensions. 200 leaves were collected and the leaf length (L), leaf width (W), product between length and width (LW) and real leaf area (LA) were measured. The criteria for determining the best model were the highest determination coefficient (R2), Willmott's concordance index (d), lowest Akaike information criterion (AIC), root mean square error (RMSE) and BIAS index closest to zero. The most suitable model for estimating the leaf area of lisianthus is the linear ŷ = 1.387*LW.
Highlights
Lisianthus [Eustoma grandiflorum (Raf.) Shinners] is an ornamental plant appreciated for its delicate flowers
The leaf area measurement is of fundamental importance, since the leaves are directly related to processes such as evapotranspiration, radiation interception and CO2 fixation (Hernandez-Santana et al, 2017), as well as obtaining several physiological variables, such as specific leaf area, leaf area ratio, net photosynthesis rate, leaf area index and leaf weight ratio, frequently used in plant growth analysis (Maia et al, 2020)
The scatter plots between the pairs of variables L, W, length and width (LW) and leaf area (LA) showed different relationships between each other, suggesting adjustments of linear and non-linear models (Figure 2)
Summary
Lisianthus [Eustoma grandiflorum (Raf.) Shinners] is an ornamental plant appreciated for its delicate flowers. Lisianthus is an annual herbaceous plant originating from the pastures of the North American prairies, with height varying between 15 to 60 cm, with bluish green leaves, large flowers grow in a tapered form on straight stems with their petals increasing in size (Castillo-González et al, 2017). This plant is grown as a cut flower due to its wide color palette and because of its long post-harvest life. Studies to evaluate the growth, development and reproduction of plants are needed, due to economic importance of this species. The leaf area measurement is of fundamental importance, since the leaves are directly related to processes such as evapotranspiration, radiation interception and CO2 fixation (Hernandez-Santana et al, 2017), as well as obtaining several physiological variables, such as specific leaf area, leaf area ratio, net photosynthesis rate, leaf area index and leaf weight ratio, frequently used in plant growth analysis (Maia et al, 2020)
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