Document Type : Research Article
Authors
1
College of Agriculture, Shahid Bahonar University of Kerman, Kerman, Ira
2
College of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
3
Horticultural Science, College of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
4
Plant Pathology, College of Agriculture, Shahid Bahonar University of Kerman, Kerman, Iran
Abstract
Tomato leaf curl Palampur virus (ToLCPalV) is a destructive bipartite begomovirus which recently is
responsible for huge losses to tomato and cucurbits production in Iran. In this research, the effect of the
silicon element, growth regulators including salicylic acid (SA), methyl jasmonate (MJ), brassinosteroids
(BR), silicon element (Si) and their interactions to response of ToLCPalV infection of the greenhouse
cucumber was studied. The study was performed as factorial experiment based on randomized complete
block design and carried out under greenhouse conditions in pots. Before planting, cucumber seeds were
presoaked separately in SA (0.5 millimolar), MJ (5 micromolar) and BR (1 micromolar). Subsequently, two
or three-leaf stage of cucumber seedlings was sprayed by Si solution (1 ml/lit), one week before
agroinoculation with ToLCPalV infectious clone. To analyze morphological and chemical characteristics,
plant growth parameters including fresh weight and plant height parameters and amount of the catalase,
peroxidase, polyphenol oxidase, ascorbate peroxidase and guaiacol peroxidase enzymes were assessed 30
days post agroinoculation with ToLCPalV infectious clone. Results indicated that, SA and combination of
MJ+Si and BR+Si treatments resulted in raising the enzyme levels which leads to delay in appearance of
ToLCPalV symptoms and decrease fresh weight and plant height parameters of plants. Based on the results
of this research, application of plant growth regulators with or without silicon element including SA, MJ,
MJ+Si and BR+Si could be resulted in increasing resistance in greenhouse cucumber against ToLCPalV
infection.
Keywords
)