The reactivity of the tomato microgametophyte to the action of growth stimulators under viral pathogenesis conditions

Tatiana Saltanovici; Larisa Andronic; Liudmila Antoci; Natalia Mascenco

doi:10.52673/18570461.25.3-78.03

Authors

Tatiana Saltanovici Institute of Genetics, Phisiology and Plat Protection, MSU https://orcid.org/0000-0002-1122-7433
Larisa Andronic Institute of Genetics, Phisiology and Plat Protection, MSU https://orcid.org/0000-0002-2761-9917
Liudmila Antoci Institute of Genetics, Phisiology and Plat Protection, MSU https://orcid.org/0009-0006-4855-6544
Natalia Mascenco Institute of Genetics, Phisiology and Plat Protection, MSU https://orcid.org/0000-0003-1869-4357

DOI:

https://doi.org/10.52673/18570461.25.3-78.03

Keywords:

tomato, pollen grain, viruses, source of variation, growth stimulator, glicoside

Abstract

The paper presents the results of research on the assessment of tomato microgametophyte reactivity to the action of growth stimulators under viral pathogenesis caused by Tobacco Mosaic Virus (TMV) or Tomato Aspermy Virus (TAV). At the haploid level, the action of glycosides was specific and contributed to the appearance of stimulating, inhibiting, or neutral reactions. By summarizing the positive effects of glycosides on tomato crops with different phytosanitary statuses, the dose with the maximum effect on microgamete viability stimulation was identified. The variation in pollen indices among the analyzed genotypes was determined by the decisive action of the glycoside. In infected plants, compared to healthy genotypes, the influence of glycosides on pollen viability was reduced; however, in TMV/ TAV-infected genotypes, the contribution of genotype to the variation of this trait exceeded the values of the control. The considerable contribution of the genotype to the observed variability allows for the identification of promising genotypes based on this index. Additionally, the action of glycosides contributed to an increase in the thermoresistance level of microgametes, a phenomenon that may be explained by the enhanced activity of pollen grains with initially reduced viability.

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