Влияние слабого постоянного магнитного поля на состав и содержание липидов в проростках редиса при различных температурах
2010
Novitskaya, G.V. | Molokanov, D.R. | Kocheshkova, T.K. | Novitskij, Yu.I., Russian Academy of Sciences, Moscow (Russian Federation). The K.A. Timiryazev Institute of Plant Physiology
The effects of slight permanent homogenous horizontal magnetic field (PMF) (400 A/m) on the composition and content of lipids and composition of their fatty acids (FA) were studied. Radish (Raphanus sativus L. var. radicula D.C., cv. Rosovo-krashyi s belym konchikom) seedlings were tested for this aim at temperatures of 20 and 10 deg C. Lipid composition and content in seedlings were compared at the phase of developed cotyledons (20 deg C, 5-day-old and 10 deg C, 8-day-old seedlings) under low light and in darkness with the lipid composition and content in dry seeds. The seedlings which had been grown in geomagnetic field (GMF) served as a control. About 99% of total lipids comprised neutral lipids (NL) in dry seeds and only 1% were polar lipids (PL). Triacylglycerols predominated among NL comprising 93% of total seed lipids. NL were consumed and PL were produced during seed germination: the amount of glycolipids increased in the control test by 3.5–5 times and the amount of phospholipis did by 1.5–2 times. PMF suppressed the formation of PL (by 18%) in the light at 20 deg C, whereas in darkness it stimulated it approximately by 80% as compared with the control test. PMF slightly stimulated PL formation in the light at 10 deg C; in darkness it did not almost affect their synthesis. PMF increased the ratio of phospholipids to sterols by 30–100% in the all test variants. PMF exerted the strongest effect on the content of erucic acid among FA: it increased in the light and in darkness at 20 deg C approximately by 25% and decreased at 10 deg C in the light by 13%. PMF behaved as a correction factor affecting lipid metabolism on the background of light and temperature action.
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