N Nurmahanova A.S., Atabayeva S.D., Tleuberdy A., Alybayeva R.A., Asrandina S.S., Kenzhebayeva S.S. Action of cadmium ions on the structure of the root of some varieties of rice (Oryza sativa L.)

Әл-Фaрaби aтындaғы Қaзaқ ұлттық университеті, Алмaты қ., Қaзaқстaн *Е-mail: akmaral.nurmahanova@gmail.com

Abstract

Cadmium is one of the most mobile heavy metals. It is actively absorbed by plants, rather quicklytransported to their aerial parts. Rice has radial cadmium transport along the root tissues to xylem. Themovement of the metal along the xylem is fundamental in the roots. Results of researches of impact ofcadmium ions on various varieties of rice are given in this article (Oryza sativa L.). As an object of a research, 4 varieties of rice have been selected: Chapsari, Barakat, Bakanas, Madina. To reveal changes inthe structure of the root, within 7 days grew up several options of rice – control,100мкМFe + 200 мкМCdSO4, 0мкМFe + 200 мкМ CdSO4, 200мкМFe + 200 мкМ CdSO4.The root of rice is outside coveredby rizodermy. The innermost layer of the cortex consists of cells of the endoderm. The thick wall of anendoderma reliably protects the tissues and increases the power of root.At influence of concentration ofcadmium in100мкМFe + 200 мкМ CdSO4the cell of exoderm became thickness for 9%in the variety ofBakanas, andthe cells became thinner for 36%in sensitive varieties of Chapsari. During the researchthethickness of the root exoderm cells grown by a concentration of 0мкМFe + 200 мкМ CdSO4 of Bakanasvariety increased for 6%, and in the Chapsari variety the thickness decreased for 50%. Moreover, underthe action of 200мкМFe + 200 мкМ CdSO4the cell of exodermwere thickened for 7%in the variety ofBakanas, and they became thinner for 45% the variety of Chapsari. It seen that the thickness of exodermcells increased in the resistant variety of Bakanas by these options, and it is, contrary, decreasedin asusceptible variety of Chapsari. Exoderm protects the root from the adverse effects of the environmentand prevents the accumulation of various toxic substances from the outside. The thickening of exodermshows the development of structural ability against a stress. Specialized complex structural indicators,interconnection and interdependence determine sustainability. In the process of carrying out a researchunder the influence of a stress, we have revealed communication of concrete structural indicators withsteady varieties of rice. As studies show, inhibition of root growth in the presence of cadmium is associated with its direct effect on cell division and stretching. The result of the negative effect of cadmium onthe physiological processes of plants is a decrease in their productivity. First of all, disturbances in thenormal life of plants are manifested in a decrease in the accumulation of biomass.Key words: rice, cadmium, exoderm, endoderm, heavy metals.
Published
2017-11-05
How to Cite
. N Nurmahanova A.S., Atabayeva S.D., Tleuberdy A., Alybayeva R.A., Asrandina S.S., Kenzhebayeva S.S. Action of cadmium ions on the structure of the root of some varieties of rice (Oryza sativa L.). Eurasian Journal of Ecology, [S.l.], v. 50, n. 1, p. 77-86, nov. 2017. ISSN 2617-7358. Available at: <http://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/757>. Date accessed: 20 may 2019.
Section
ОЦЕНКА ДЕЙСТВИЯ ЗАГРЯЗНИТЕЛЕЙ ОКРУЖАЮЩЕЙ СРЕДЫ НА БИОТУ И ЗДОРОВЬЕ НАСЕЛЕНИЯ