Photosynthetica 2007, 45(2):306-308 | DOI: 10.1007/s11099-007-0051-z

Leaf area estimation of sunflower leaves from simple linear measurements

Y. Rouphael1,*, G. Colla1, S. Fanasca1, F. Karam2
1 Dipartimento GEMINI, Università della Tuscia, Viterbo, Italy
2 Department of Irrigation and Agro-Meteorology, Lebanese Agricultural Research Institute, Zahlé, Lebanon

Simple, accurate, and non-destructive methods for determining leaf area (LA) of plants are important for many experimental comparisons. Determining the individual LA of sunflower (Helianthus annuus L.) involves measurements of leaf parameters such as length (L) and width (W), or some combinations of these parameters. Two field experiments were carried out during 2003 and 2004 to compare predictive equations of sunflower LAs using simple linear measurements. Regression analyses of LA vs. L and W revealed several equations that could be used for estimating the area of individual sunflower leaves. A linear equation having W2 as the independent variable provided the most accurate estimate (r 2 = 0.98, MSE = 985) of sunflower LA. Validation of the equation having W2 of leaves measured in the 2004 experiment showed that the correlation between calculated and measured areas was very high.

Additional key words: Helianthus annuus L; leaf parameters; non-destructive methods

Received: May 29, 2006; Accepted: December 1, 2006; Published: June 1, 2007  Show citation

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Rouphael, Y., Colla, G., Fanasca, S., & Karam, F. (2007). Leaf area estimation of sunflower leaves from simple linear measurements. Photosynthetica, 45(2), 306-308. doi: 10.1007/s11099-007-0051-z
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