4.4 Article

Chemotaxonomic and evolutionary perspectives of Bryophyta based on multivariate analysis of fatty acid fingerprints of Eastern Himalayan mosses

Journal

PROTOPLASMA
Volume 259, Issue 5, Pages 1125-1137

Publisher

SPRINGER WIEN
DOI: 10.1007/s00709-021-01723-0

Keywords

Acetylenic fatty acids; Bryophyta; Chemotaxonomy; Eastern Himalayas; Multivariate analysis; Polyunsaturated fatty acids

Funding

  1. University Grants Commission, Government of India [UGC/1259/RFSMS/BOT, UGC/851/RFSMS/Botany]
  2. Department of Science and Technology, Government of West Bengal [473(Sanc.)/ST/P/ST/1G-16/2010]
  3. University Grants Commission-Centre of Advanced Study (UGC-CAS), Government of India
  4. Department of Science and Technology Fund for Improvement of S&T Infrastructure in Higher Educational Institutions (DST-FIST), Government of India

Ask authors/readers for more resources

The study conducted a comprehensive investigation of fatty acid profiles of mosses from Eastern Himalayas, revealing various types of fatty acids and significant variation in C20 polyunsaturated fatty acids content among the investigated mosses. Principal component analyses based on individual fatty acids and related parameters validated C20:4n6 content and the ratio of C20:4n6/C18:2n6 as apparent chemotaxonomic discriminants.
Bryophyta comprises one of the earliest lineages of land plants that had implemented remarkable innovations to their lipid metabolic systems for successful adaptation to terrestrial habitat. This study presents a comprehensive investigation of fatty acid profiles of mosses from Eastern Himalayas with an aim to trace their chemotaxonomic and evolutionary implications. Fatty acid compositions of 40 random mosses belonging to major families of Bryophyta were explored by gas chromatographic analysis. A diverse array of saturated, monounsaturated and polyunsaturated fatty acids including rare acetylenic fatty acids were detected. Hexadecanoic acid (C16:0), 9,12 (Z,Z)-octadecadienoic acid (C18:2n6) and 9,12,15 (Z,Z,Z)-octadecatrienoic acid (C18:3n3) were the predominant fatty acids in all the mosses. However, quantitative variation of C20 polyunsaturated fatty acids (PUFAs), specifically 5,8,11,14 (Z,Z,Z,Z)-eicosatetraenoic acid (C20:4n6), among the investigated mosses was the most prominent outcome. The diplolepidous members of Bryidae, especially the mosses of Hypnales, Bryales and Bartramiales contained higher amount of C20 PUFAs compared with the haplolepidous orders. Principal component analyses based on individual fatty acids and other related parameters validated C20:4n6 content and the ratio of C20:4n6/C18:2n6 as the apparent chemotaxonomic discriminants. The prevalent notion of considering 9,12,15-octadecatrien-6-ynoic acid (C18:4a) as the chemomarker of Dicranaceae has also been challenged, since the compound was detected not only in different families of Dicranales, but also in a Pottiales member, Leptodontium viticulosoides. Therefore, an ensemble of fatty acids instead of a single one can be considered as the chemical signature for taxonomic interpretation which may also be vital from an evolutionary standpoint.

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