Fatty acid composition, diosgenin and trigonelline contents of fenugreek (Trigonella foenum-graecum): effects of phosphorus fertilizer

• Published in: Plant biosystems Vol. 155; no. 4; pp. 663 - 667
• Main Authors: Beyzi, Erman, Köngül Şafak, Esra, Gürbüz, Perihan, Koşar, Müberra, Gürbüz, Bilal
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 27.05.2021; Taylor & Francis Ltd
• Subjects: Composition; Crude oil; crude oil content; diosgenin; Fatty acid composition; Fatty acids; Fenugreek; Fertilizers; Linoleic acid; Linolenic acid; Oil; Phosphorus; Phosphorus pentoxide; Trigonella foenum-graecum; trigonelline
• ISSN: 1126-3504; 1724-5575
• DOI: 10.1080/11263504.2020.1769216

The present study was conducted to investigate the effects of phosphorus fertilizer treatments (0, 30, 60, 90 and 120 kg ha −1 P 2 O 5 ) on crude oil, diosgenin, and trigonelline contents and on fatty acid composition of fenugreek plants. Experiments were conducted in a randomized block design with four replications. Results revealed under different phosphorus fertilizer doses that crude oil content varied between 4.75 and 5.54%, diosgenin content varied between 0.43 and 0.52% and trigonelline content varied between 0.74 and 0.97%. The highest diosgenin and trigonelline contents were obtained under the 30 kg ha −1 P 2 O 5 treatment and the highest crude oil content was observed under the 60 kg ha −1 P 2 O 5 treatment. With regard to fatty acid composition, C 18:2 , C 18:3 , C 16:0 , C 18:0 , C 18:1 and C 20:0 were identified as the major components and C 14:0 , C 16:1 , C 17:0 , C 17:1 , C 20:1 and C 22:0 were identified as the minor ones. Linoleic acid (C 18:2 ) content varied between 42.78 and 43.44% and linolenic acid (C 18:3 ) content varied between 26.77 and 29.21%. Except for linolenic acid (C 18:3 ), the highest contents of all the other major components were observed with the 90 kg ha −1 P 2 O 5 treatment.