Journal of Applied and Natural Science 8 (1): 140-143 (2016)
A linear model for leaf area measurement to screen potential leaf material for
herbal drug in Adhatoda vasica L.
J. V. Thaker, R. P. Kuvad and V. S. Thaker*
Centre for Advanced Studies in Plant Biotechnology and Genetic Engineering, Department of Biosciences,
Saurashtra University, Rajkot- 360 005 (Gujarat), INDIA
*Corresponding author. E-mail: email@example.com
Abstract : Leaf area is an important parameter in physiology and agronomy studies. Linear models for leaf area
measurement are developed for plant species as a nondestructive method. The plant Adhatoda vasica L. (a medicinal plant) was selected and the leaves of this plant were used for development of linear model for leaf area using
Leaf Area Meter (LAM) software. Planimetric parameters (length, length 2, width and width2) and gravimetric (dry
weight and water content) parameters are considered for the development of linear model for this plant species.
Single factor ANOVA and linear correlations were worked out using these parameters and leaf area. The plant was
showed significant relationship with the parameters studied. The best correlation as represented by regression
coefficient (R2) was used and improved R2 is worked out. It is observed that with increase in leaf area, water content
is also increased and showed best correlation with the leaf area. Thus water content can be taken as a parameter
for developing linear model for leaf area is concluded.
Keywords : Adhatoda vasica L., Gravimetric parameters, Leaf area, Planimetric parameters, Regression coefficient