Estimation of Leaf Area in Coneflower (Echinacea purpurea L.) Using Independent Variables
الموضوعات : مجله گیاهان زینتیMohammad Hossein Aminifard 1 , Mahdi Khayyat 2 , Hassan Bayat 3
1 - Department of Horticultural Science, College of Agriculture, University of Birjand, Birjand, Iran
2 - Department of Horticultural Science, College of Agriculture, University of Birjand, Birjand, Iran
3 - Department of Horticultural Science, College of Agriculture, University of Birjand, Birjand, Iran
الکلمات المفتاحية: Leaf length, Leaf width, Linear model, Non-destructive methods,
ملخص المقالة :
Leaf area information is required in various horticultural and physiological studies and it will be more useful if done via non-destructive methods. The objective of this study was to establish equations to estimate leaf area (LA) using length (L), width (W), fresh weight (FW), dry weight (DW), length × length (L2), width × width (W2), length × width (L×W), length + width (L+W), fresh weight × fresh weight (FW2) and dry weight × dry weight (DW2) of coneflower (Echinacea purpurea L.) leaves as a medicinal and landscape plant. An open field experiment was carried out to study relationship between leaf dimension and weight with leaf area of this plant. Observed leaf area was obtained by an automatic measuring device and leaf dimensions were measured by a ruler. A linear model employing L × W as an independent variables [LA = 0.575 (L × W) - 0.934] resulted in the most accurate estimation (R2 = 0.874, RMSE = 2.33) of coneflower leaf area. Validation of the regression model showed that the correlation between measured and simulated values by using this equation was quite acceptable.
Allen, O. B. and Raktoe, B. L. 1981. Accuracy analysis with special reference to the predictions of grassland yield. Biometrical Journal. 23 (4): 371-388.
Carter, S., Becker, C. and Lily, B. 2007. Perennials. Timber Press, Inc., Oregon, USA.
Cho, Y. Y., Oh, S., Oh, M. M. and Son, J. E. 2007. Estimation of individual leaf area, fresh weight, and dry weight of hydroponically grown cucumbers (Cucumis sativus L.) using leaf length, width, and SPAD value. Scientia Horticulturae, 111: 330–334.
Cristofori, V., Fallovo, C., Mendoza-De, G. E., Rivera, C. M., Bignami, C. and Rouphael, Y. 2008. Non-destructive, analogue model for leaf area estimation in persimmon (Diospyros kaki L.f) based on leaf length and width measurement. EuropeanJournal of Horticultural Science, 73: 216–221.
Demarty, J., Chevallier, F., Friend, A. D., Viovy, N., Piao, S. and Ciais, P. 2007. Assimilation of global MODIS leaf area index retrievals within a terrestrial biosphere model. Geophysical Research Letters, 34(15): L15402.
De Swart, E. A. M., Groenwold, R., Kanne, H. J., Stam, P., Marcelis, L. F. M. and Voorrips, R. E. 2004. Non-destructive estimation of leaf area for different plant ages and accessions of Capsicum annuum L. Journal of Horticultural Science and Biotechnology, 79: 764–770.
Fallovo, C., Cristofori, V., Mendoza-De G. E., Rivera, C. M., Rea, R., Fanasca, S., Bignami, C., Sassine, Y. and Rouphael, Y. 2008. Leaf area estimation model for small fruits from linear measurements. Horticultural Science, 43: 2263–2267.
Gill, J. L. 1986. Outliers, and influence in multiple regression. Journal of Animal Breeding and Genetics, 103: 161–175.
Guo, D. P. and Sun, Y. Z. 2001. Estimation of leaf area of stem lettuce (Lactuca sativa var. angustana) from linear measurements. Indian Journal of Agricultural Science, 1: 483–486.
Hobbs, C. 1994. Echinacea: A literature review, HerbalGram (American Botanical Council). 30: 33–48.
Janssen, P. H. M. and Heuberger, P. S. C. 1995. Calibration of process-oriented models. Ecological Modeling 83 (1): 55-56.
Kandiannan, K., Parthasarathy, U., Krishnamurthy, K. S., Thankamani, C. K. and Srinivasan, V. 2009. Modeling individual leaf area of ginger (Zingiber officinale Roscoe) using leaf length and width. Scientia Horticulturae, 120: 532–537.
Kumar, R. 2009. Calibration and validation of regression model for non-destructive leaf area estimation of saffron (Crocus sativus L.). Scientia Horticulturae, 122: 142–145.
Kvet, J. and Marshall, J. K. 1971. Assessment of leaf area and other assimilating plant surfaces. p. 517–555. In: Z., Sestak, J., Catsky, P. G. Jarvis (eds), Plant photosynthetic production. Manual of Methods. Dr. W. Junk N.V. Publ. The Hague.
Lu, H. Y., Lu, C. T., Wei, M. L. and Chan, L. F. 2004. Comparison of different models for nondestructive leaf area estimation in taro. Agronomy Journal, 96: 448–453.
Marquardt, D. W. 1970. Generalized inverse, ridge regression and biased linear estimation. Technomet, 12: 591–612.
Montero, F. J., de Juan, J. A., Cuesta, A. and Brasa, A. 2000. Nondestructive methods to estimate leaf area in Vitis vinifera L. HortScience 35: 696–698.
Nesmith, D. S. 1992. Estimating summer squash leaf area non-destructively. Horticultural Science, 27 (1): 27- 77.
Peksen, E. 2007. Non-destructive leaf area estimation model for faba bean (Vicia faba L.). Scientia Horticulturae, 113: 322–328.
Robbins, N. S. and Pharr, D. M. 1987. Leaf area prediction models for cucumber from linear measurements. Horticultural Science, 22 (6): 1264–1266.
Rouphael, Y., Colla, G., Fanasca, S. and Karam, F. 2007. Leaf area estimation of sunflower leaves from simple linear measurements. Photosynthetica, 45: 306–308.
Rouphael, Y., Mouneimne, A. H., Ismail, A., Mendoza-De, G. E., Rivera, C. M. and Colla, G. 2010. Modeling individual leaf area of rose (Rosa hybrida L.) based on leaf length and width measurement. Photosynthetica, 48 (1): 9-15.
Rouphael, Y., Rivera, C. M., Cardarelli, M., Fanasca, S. and Colla, G. 2006. Leaf area estimation from linear measurements in zucchini plants of different ages. Journal of Horticultural Science and Biotechnology, 81: 238–241.
Smith, R. J. and Kliewer, W. M. 1984. Estimation of Thompson seedless grapevine leaf area. American Journal of Enology and Viticulture, 35: 16-22.
Spann, T. M. and Heerema, R. J. 2010. A simple method for non-destructive estimation of total shoot leaf area in tree fruit crops. Scientia Horticulturae, 125: 528-533.
Stoppani, M. I., Wolf, R., Francescangeli, N. and Martı, H. R. 2003. A nondestructive and rapid method for estimating leaf area of broccoli. AdvancesinHorticultural Science, 17: 173–175
Tsialtas, J. T. and Maslaris, N. 2005. Leaf area estimation in a sugar beet cultivar by linear models. Photosynthetica, 43 (3): 477-479.
Willmott, C. J. 1981. On the validation of models. Physical Geography, 2 (1): 184-194.
