ANALYSIS OF GROWING AND FERTILIZING PROPERTIES OF NICOTIANA ALATA GAMMA-IRRADIATED POLLEN

Автор(и)

  • L. V. Grubska
  • I. M. Gudkov
  • A. V. Klepko
  • S. V. Andreychenko

DOI:

https://doi.org/10.31548/biologiya2018.287.192

Анотація

Gamma-irradiated pollen is very often used as a tool for genetic reconstruction of plant cell. In view of this the necessity of pursuing detailed research in order to develop a basic radiobiologic theory for the explanation of discovered phenomena has emerged. The present research aimed at studying gamma-irradiation effects of different doses on germination of tobacco (Nicotiana alata) pollen on artificial feeding medium, growth properties of pollen tubes and mitotic division of generative cell on sperms. The dry tobacco pollen was gamma-irradiated in the dose range 50 – 3000 Gy and then germinated in the solution of 10 % sucrose and 0,01 % boric acid in sterile tap water. Germination and the length of pollen- tubes was determined by the aid of ocular-micrometer under the light microspore “MBU - 3” at the magnification ×150. The pollen nuclei were stained with 2% acetoorsein. Gamma-radiation was shown to gradually suppress germination and pollen tube growth, the doses higher than 2000 Gy being critical for said events. Meanwhile the generative cell division on sperms completely ceased at the dose 300 Gy and higher ones. Simultaneously the dose-dependent slowing of pollen tube grown speed was established. The multiplicity of physiological changes which emerged in pollen after gamma-irradiation, to our opinion, was in favour of gynogenesis and apomixis occurrence.

Посилання

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2018-11-16

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