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ISHS Acta Horticulturae 1299: XXX International Horticultural Congress IHC2018: VII International Symposium on Tropical and Subtropical Fruits, Avocado, II International Symposium on Jackfruit and Other Moraceae and II International Symposium on Date Palm

Effect of rootstocks on quantity and quality of essential peel oil of 'Kinnow' mandarin (Citrus reticulata Blanco)

Authors:   M.N. Khan, M. Asim, T. Ashraf, W. Ahmed, T. Abbas, A.U. Malik, R. Anwar, E. Ul-Haq
Keywords:   'Rough lemon', limonene, gas chromatography, peel oil composition
DOI:   10.17660/ActaHortic.2020.1299.14
Abstract:
A quantitative and qualitative study was designed to check the effect of various rootstocks on peel essential oils of ‘Kinnow’ mandarin. Eight different rootstocks, i.e., ‘Mithi’ (Citrus jambhiri Lush.), ‘Volkamariana’ (C. jambhiri Lush × C. volkamariana), ‘Yuma citrange’ (P. trifoliata (L) Raf × C. sinensis (L) Osbeck), ‘Brazilian sour orange’ (C. aurantium L.), ‘Rough lemon’ (C. jambhiri Lush.), ‘Troyer citrange’ (P. trifoliate (L) Raf × C. sinensis (L) Osbeck.), ‘Citrumelo 1452’ (P. trifoliate (L) Raf × C. paradisi Macf.) and ‘Citrumelo 4475’ (P. trifoliate (L) Raf × C. paradisi Macf.) grafted by ‘Kinnow’ mandarin were evaluated. Quantitatively, the extracted citrus peel essential oils ranged from 6.47 to 22.76 mL, with a quantitative difference of 16.29 mL between the selective rootstocks. Maximum peel essential oils were depicted by rootstock ‘Mithi’ (31.76 mL), followed by ‘Troyer citrange’ (28.45 mL). Gas chromatography of peel samples of ‘Kinnow’ revealed five volatile compounds (β-terpinene, myrcene, citronellyl acetate, citral and citronol) in ‘Mithi’, ‘Volkamariana’, ‘Yuma citrange’ and ‘Brazilian sour orange’; four compounds (β-terpinene, linalool, citronellyl acetate and limonen) in ‘Rough lemon’ and ‘Troyer citrange’; single compound of limonene in ‘Citrumelo 1452’ and limonene and piperonaldehyde were identified separately in ‘Citrumelo 4475’. It can be concluded from the findings that rootstock has a profound effect on the amount and composition of peel essential oils of ‘Kinnow’ mandarin.

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