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“Dicranin” in the Membrane Phospholipids of a Dicranaceae and Pottiaceae Moss Member of the Eastern Himalayan Biodiversity Hotspot
Author(s) -
Roy Chowdhuri Sumedha,
Biswas Raha Anashuya,
Mitra Souvik,
Datta Jayashree,
Poddar Sarkar Mousumi
Publication year - 2018
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1002/lipd.12054
Subject(s) - pottiaceae , moss , fatty acid , chemistry , derivatization , biochemistry , chromatography , mass spectrometry , botany , biology
The phospholipids of two moss samples Oreoweisia laxifolia (Hookf.) Kindb. (family‐Dicranaceae Schimp.) and Leptodontium viticulosoides (P. Beauv.) Wijk & Margad (family‐Pottiaceae Schimp.) of the Eastern Himalayan Biodiversity Hotspot were investigated to find out any peculiarity in their fatty acid profiles. Detailed analysis of phospholipid classes and the respective fatty acids was performed using high‐performance thin‐layer chromatography and gas chromatography‐mass spectrometry. An array of different saturated and unsaturated fatty acids were detected in both the samples. Although it has been proposed previously that acetylenic fatty acids are associated only with triacylglycerol of storage lipids, the most striking observation of the present investigation is the abundance of an acetylenic fatty acid, octadeca‐6‐yn‐9,12,15‐trienoic acid (18:4a), or Dicranin, in the phospholipids of both the mosses. The position of the triple bond in the hydrocarbon chain of the fatty acids was confirmed by dimethyloxazoline derivatization of fatty acids and their characteristic mass fragmentation pattern. The occurrence of Dicranin in phospholipids and in the Pottiaceae family is reported for the first time, with substantial explanations of the observed results. This may raise the issue of rethinking “Dicranin” as a chemotaxonomic marker of Dicranaceae.