Changes in molybdenum concentration in the central vacuole and endosperm of Clivia miniata Regel

• Autorzy: Reczynski W. , Kowalska A.
• Języki publikacji: EN

Abstrakty

EN

In previous research, changes in concentrations of the physiologically essential elements K, Na, Ca, Mg, Fe, Mn, Zn, Cu and B in developing ovules of Clivia miniata Regel (central vacuole sap, endosperm tissue and embryo) were examined. Now the authors present results of measurements of change in molybdenum concentration in the central vacuole and micropylar and chalazal parts of endosperm during development of C. miniata ovules. The analysis was performed with the use of flameless atomic absorption spectrometry, with Zeeman background correction and using pyrolytically coated graphite tubes. The dimensions of the embryos and their age (counted from the day the perianth wilted to the day of sampling) were the adopted developmental criteria. It was established that (1) during the inhibitional phase of embryo growth, the concentration of Mo in the central vacuole sap varied from 0.021 to 0.052 µg/ml; (2) the Mo concentration in the micropylar part of the endosperm was in the range of 0.032-0.085 µg/g fr.wt. and increased during the exponential and stationary phases of embryo growth; (3) the same increasing tendency was found in the chalazal part of the endosperm tissue (concentration range: 0.074-0.11 µg/g fr.wt.); (4) the concentration of Mo in the chalazal part of the endosperm was higher than in the micropylar part during the examined period of embryo growth.

Słowa kluczowe

EN

Clivia miniata; molybdenum; concentration change; endosperm; central vacuole; ovule development

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 2000
• Tom: 42
• Numer: 2
• Opis fizyczny: p.73-77,fig.

Twórcy

autor

Reczynski W.

• Academy of Mining and Metallurgy, Al.Mickiewicza 30, 30-059 Krakow, Poland

autor

Kowalska A.

Bibliografia

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