Padma S.1, Shubha2, Swetha P.3, Narasimhamurthy3 and Sundararaj R.3*
1Indian Institute of Science, Bangalore
2Adam Mickiewicz University Poznan, Poland
3Institute of Wood Science and Technology, Bangalore
Email: rsundariwst@gmail.com
Received-01.01.2024, Revised-13.01.2024, Accepted-25.01.2024
Abstract: Sandalwood (Santalum album L.) is an economically important versatile hardwood species in India and it is known to grow in varied regions and climatic conditions. Identifying the appropriate plant traits is crucial for ensuring sustained yield in plantation over the long term. The objective of this study was to explore the biophysical characteristics of sandalwood, uncovering variations in the examined traits. The investigation reveals diverse leaf colorations ranging from yellowish-green to dark green, exhibiting varying degrees of intensity. Seven distinct leaf shapes were identified, including Ovate, Obcordate, Elliptical, Lanceolate, Sickle-shaped, Oblanceolate, and Obovate. The leaf lamina displayed a surface area spanning from 7.6 cm² to 21.26 cm², while thickness along the midrib ranged from 498.92 µm to 877.13 µm. Additionally, laminal side thickness varied from 196.09 µm to 406.73 µm. Microscopic analysis unveiled stomatal indices on the abaxial leaf surface, ranging from 19.28% to 29.46%. Furthermore, the study assessed epicuticular wax content, revealing a maximum of 11.97 g and a minimum of 2.41 g per leaf. These findings provide valuable insights into the diverse leaf traits within the species, highlighting the significance of morphological and anatomical characteristics in plant taxonomy and ecology. Further exploration of these traits may unveil their significance in conferring resistance against pests and pathogens affecting sandalwood.
Keywords: Sandalwood, Biophysical, Leaf, variations
REFERENCES
Barbour, L., Norris, L. and Burgess, T. (2010). Heartwood rot identification and impact in sandalwood (Santalum album). RIRDC Publication No. 10/179, Rural Industries Research and Development Corporation,The Commonwealth of Australia,pp: 24.
Brandis, D. (1902). Treatment of the sandal tree. Indian Forester, 29(1):3-6.
Carlson, J.E., Adams, C.A. and Holsinger, K.E. (2016). Intraspecific variation in stomatal traits, leaf traits and physiology reflect adaptation along aridity gradients in a South African shrub. Annals of botany, 117(1):195-207.
Chen, F.S., Niklas, K.J., Chen, G.S. and Guo, D. (2012). Leaf traits and relationships differ with season as well as among species groupings in a managed Southeastern China forest landscape. Plant Ecology, 213(9):1489-1502.
Dhanya, B., Viswanath, S. and Purushothman, S. (2010). Sandal (Santalum album L.) conservation in southern India: A review of policies and their impacts.Journal of Tropical Agriculture,48(1–2):1–10.
Hujon, F. and Saral, A.M. (2022). Chemical investigation of epicuticular wax obtained from Euphorbia milii leaves. SN Applied Sciences,4:122.
Karthik, A.G., Durai, M. and Ravi, N. (2022). Phenotypic Variation in Leaves of Santalum album L. Indian Journal of Ecology, 50(5):1308-1314.
Khalil, H., Raza, M.A.B., Afzal, M., AnjumAqueel, M., Sajjad Khalil, M. and Mudassir Mansoor, M. (2017). Effects of plant morphology on the incidenceof sucking insect pests complex in few genotypesof cotton. Journal of the Saudi Society of Agricultural Sciences, 16:344-349.
Kjaer, E. D. and Foster, G. S. (1996). Technical NoteNo. 43. The economics of tree improvement of teak (Tectona grandis L.) Danida Forest Seed Centre, pp:22.
Laxman, G., Ravi, P. and Uma Maheswari, T. (2017). Interaction between pest incidence of leafhoppers, Empoascaflavescens Fab and epicuticular wax content in the leaves of castor genotypes. Environment and Ecology, 35(3):1630-1633
Medeiros, C. D., Falcão, H., Almeida, J. S., Santos, D., Oliveira A. F. M. and Santos, M. G. (2017). Leaf epicuticular wax content changes under different rainfall regimes, and its removal affects the leaf chlorophyll content and gas exchanges of Aspidospermapyrifolium in a seasonally dry tropical forest. South African Journal of Botany, 111: 267-274.
Nurdin., Kusharto, C., Tanziha, I. and Januwati, M. (2009). Kandungan Klorofil Berbagai Jenis Daun Tanamandan Cu-Turunan Klorofil Serta Karakteristik Fisiko-Kimianya. Gizi dan Pangan,4:13-19.
Paul, V., Sharma, L., Pandey, R., and Meena, R. C. (2017). Measurements of stomatal density and stomatal index on leaf/plant surfaces. Manual of ICAR Sponsored Training Programme for Technical Staff of ICAR Institutes on―Physiological Techniques to Analyze the Impact of Climate Change on Crop Plants, pp:27.
Painter, R. H. (1951). Insect Resistance in Crop Plants, Macmillan and Co., New York,pp:520.
Song, H., Dong, Z., Li, L., Lu, Z., Li, C., Yu, Y. and Men, X. (2021). Relationships among the feeding behaviors of a mirid bug on cotton leaves of different ages and plant biochemical substances. Journal of Insect Science, 21(1):15.
Sundararaj, R., Shanbhag, R.R. and Lingappa, B. (2018). Habitat diversification in the cultivation of Indian sandalwood (Santalum album Linn): An ideal option to conserve biodiversity and manage insect pests. Journal of Biological Control,32(3):160-164.
Sundararaj, R. and Sharma, G. (2010). Studies on the floral composition in the six selected provenances of Sandal (Santalum album Linnaeus) of South India. Biological Forum — An International Journal, 2(2):73-77.
Sindhu, R.K., Upma, K.A. and Arora, S. (2010). Santalum album linn: a review on morphology, phytochemistry and pharmacological aspects. International Journal of PharmTech Research, 2(1):914-919.
Yin, Y., Bi, Y., Chen, S., Li, Y., Wang, Y., Ge, Y., Ding, B., Li, Y.C. and Zhang, Z. (2011). Chemical composition and antifungal activity of cuticular wax isolated from Asian pear fruit (cv. Pingguoli). Scientia Horticulturae,129:577–582.