Correlation between pollen fertility of woody plants

Abstract

: The article presents the results of a comparative analysis of the size and viability of pollen from the most common types of trees and shrubs growing in street plantings of Aktobe city: Ulmus pinnato-ramosa, Ulmus laevis, Acer negundo, Populus tremula and Syringa vulgaris . Sterility of pollen may indicate a depressed state of woody plants long before it dries or dies. As a result pollen of Ulmus laevis and Acer negundo showed sensitivity to urban conditions. A correlation between pollen size and fertility was found. title not content, it not contain bibliographic it reflect the summary of the article, preserving the structure of the article - introduction/ problem statement /goals/ history, research methods, results /discussion, conclusion). Keywords (6-8 words/word combination. Keywords should reflect the main content of the article, use terms from the as well as terms that define and include other important concepts that make it easier and more convenient to Abstract: Efficient infection of Nicotiana benthamiana plants with wild type Tomato bushy stunt virus (TBSV) is influenced by expression of protein P19, which is a potent RNAi suppressor. The capsid protein (СР) P41 is required for virion formation and facilitates long distance movement of the virus. Along with RNAi suppression, P19 protein is involved in the development of severe disease symptoms in N. benthamiana and elicitation of Hypersensitive Response (HR) in tobacco. Our results show that wild type TBSV infection of Solanum lycopersicum (cv. Money maker) triggers resistance to the virus. Despite detectable accumulation levels of P19 protein in leaf and root tissues, the infection was not accompanied with obvious disease symptoms. Contrastingly, inoculation with TBSV mutant, lacking capsid protein P41 demonstrated susceptibility to TBSV. Moreover, Chl-FI analysis of plants infected with virus exhibited significant changes in metabolism. Our data suggests that in response to CP expression tomato plants have evolved defense mechanisms to resist viral infection.