Journal of Environmental BiologypISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP |
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Abstract - Issue Nov 2009, 30 (6) BackEffect of seabuckthorn
extract on delayed chlorophyll fluorescence on
Cd and Co ions treated wheat seedlings R.A. Ganiyeva1, E.M. Novruzov2,
1Biophysics laboratory,
2Plant Resources Department, 3Department
of Biophysics and Molecular Biology, (Received: Abstract: The protecting effect of “Hypporamine PL” compound isolated from dry leaves of seabuckthorn (Hippophae rhamneides L.) on photosystem 2
(PS 2) activity suppression induced by CdCl2 and CoCl2 treatment in the 7 day
old wheat seedlings (Triticum aestivum
L.) under different pH of growth medium was investigated by measurement of
millisecond delayed fluorescence (ms-DF) of chlorophyll intact leaves. The
value o-i/p-s of ms-DF ratio was reduced under the Cd2+ and Co2+ treatments on 60 and
65% respectively at pH 6.7. Acidification of medium (pH 5.0)
results in decreasing of ratio o-i/p-s only
approximately on 30% in average. In the alkaline medium the lowering of
o-i/p-s on 41% is observed in both ions treatments.
This decreasing of o-i/p-s ratio occurred due to
decreasing of fast phase o-i amplitude. At the same
time the widening and increasing of slow phase p-s amplitude was observed. The
compound “ Key words: Heavy metal ions, Seabuckthorn
extract, Delayed fluorescence, Photosystem 2 PDF of full length paper
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