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Russian Journal of Plant Physiology

, Volume 57, Issue 1, pp 52–61 | Cite as

Effect of weak constant magnetic field on the composition and content of lipids in radish seedlings at various temperatures

  • G. V. NovitskayaEmail author
  • D. R. Molokanov
  • T. K. Kocheshkova
  • Yu. I. Novitskii
Research Papers

Abstract

We studied the effects of weak permanent homogenous hirizontal magnetic field (PMF) (400 A/m) on the composition and content of lipids and composition of their fatty acids (FAs) in radish (Raphanus sativus L. var. radicula D.C., cv. Rosovo-krashyi s belym konchikom) seedlings at temperatures of 20 and 10°C. We compared lipid composition and content in seedlings at the phase of developed cotyledons (20°C, 5-day-old, and 10°C, 8-day-old seedlings) under low light and in darkness with the lipid composition and content in dry seeds. The seedlings grown in geomagnetic field (GMF) served as a control. In dry seeds, about 99% of total lipids comprised neutral lipids (NL) and only 1% were polar lipids (PL). Triacylglycerols predominated among NL comprising 93% of total seed lipids. During seed germination, NLs were consumed and PL were produced: the amount of glycolipids increased in control by 3.5–5 times and the amount of phospholipis, by 1.5–2 times.In the light at 20°C, PMF suppressed the formation of PL (by 18%), whereas in darkness, it stimulated it approximately by 80% as compared with control. In the light at 10°C, PMF slightly stimulated PL formation; in darkness, it did not almost affect their synthesis. In all treatments, PMF increased the ratio of phospholipids to sterols by 30–100%. Among FA, PMF exerted the strongest effect on the content of erucic acid: it increased in the light and in darkness at 20°C approximately by 25% and decreased at 10°C in the light by 13%. PMF behaved as a correction factor affecting lipid metabolism on the background of light and temperature action.

Key words

Raphanus sativus seedlings weak permatent horizontal magnetic field low temperature light/darkness polar lipids neutral lipids fatty acids 

Abbreviations

GL

glycolipids

GMF

geomagnetic field

DGDG

digalactosyldiacylglycerols

DPG

diphosphatidylglycerols

EMF

electromagnetic field

FS

free sterols

MF

magnetic fields

NL

neutral lipids

PA

phosphatidic acid

PhL

phospholipids

PC

phosphatidylcholins

PE

phosphatidylethanolamines

PL

polar lipids

PMF

permanent magnetic field

POL

peroxidation of lipids

PG

phosphatidylglycerols

PI

phosphatidylinosites

PS

phospatidylserine

S

saturated FAs

SQDG

sulfoquinovosyldiacylglycerols

St

sterols

StE

sterol esters

TAG

triacylglycerols

U

unsaturated FAs

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Copyright information

© Pleiades Publishing, Ltd. 2010

Authors and Affiliations

  • G. V. Novitskaya
    • 1
    Email author
  • D. R. Molokanov
    • 1
  • T. K. Kocheshkova
    • 1
  • Yu. I. Novitskii
    • 1
  1. 1.Timiryazev Institute of Plant PhysiologyRussian Academy of SciencesMoscowRussia

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