MITOTIC INDEX OF MERISTEMATIC CELLS AND ROOT GROWTH OF PISUM SATIVUM IS AFFECTED BY INOSITOL CYCLE
MODULATORS
S. A. Dmitrieva, F. V. Minibayeva, L. K. Gordon
Kazan' Institute of Biochemistry and Biophysics, Kazan' Research Centre RAS, Kazan';
e-mail: s_dmitrieva@yahoo.com
Relationships between cell division and inositol cycle modulation caused by different effectors in roots of
Pisum sativum were studied. Stimulation of the inositol cycle by myoinositol increased the mitotic index of
meristematic cells and root length, while the inhibition of the cycle with Li+ and a heavy metal
Gd3+ considerably decreased mitotic activity and growth. Exposure of roots to 10 mM ÑàÑl2
and 15 mM myoinositol resulted in the accumulation of chromosome aberrations. Changes in the activity of inositol
cycle are assumed to be involved in the root growth control.
Key words: reactive oxygen species, inositol cycle, pea roots, mitotic index, growth
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