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Eren I.,Horticultural Research Institute of Egirdir | Sarsu H.C.,Horticultural Research Institute of Egirdir | Karamursel O.F.,Horticultural Research Institute of Egirdir | Pektas M.,Horticultural Research Institute of Egirdir
Acta Horticulturae | Year: 2010

The effects of 1-MCP (a chemical which includes methyleyelopropene, dextrose, cyclodextrin A.I. and amino acid salt) treatments were determined on fruit drop at pre-harvest and fruit quality during the storage period of 'Stark Spur Golden' was determined and the chemical was applied as three doses (0-150-300 a.i.g/ha). The 1-MCP was applied at two different times on apple trees as two groups. The application on the first group of apple trees was made seven days before optimum harvest time and harvested on optimum harvest time. The application on the second group of apple trees was made at optimum harvest time and harvested at seven days after optimum harvest time. Fruit were stored at 0°C (air humidity, 85-90%) in a polyurethane sandwich panel cold air store. Physical and chemical analyses at 60 and 120 days from harvest were done on stored fruits. Consequently, fruit flesh firmness, soluble solids and colors of fruit skin were measured and the chemical application which was made as 300 a.i.g/ha dose in optimum harvest time has been suggested as the most useful application.

Yesilcollou S.,Ege University | Minoia S.,CNR Institute of Plant virology | Torchetti E.M.,CNR Institute of Plant virology | Kaymak S.,Horticultural Research Institute of Egirdir | And 4 more authors.
Journal of Plant Pathology | Year: 2010

A survey of the presence of Pear blister canker viroid (PBCVd) in pear trees in Turkey was carried out by tissue print hybridization. Four out of 74 trees (5.4%) from a pear germplasm collection tested positive and this result was confirmed by RT-PCR and sequencing. Molecular characterization of the Turkish PBCVd isolates from four different local pear cultivars, together with multiple sequence alignments and phylogenetic analyses including all PBCVd sequences reported previously, provided an insight in the sequence variability of this viroid and showed that: (i) a total of 98 polymorphic positions distributed throughout the molecule are present in PBCVd genomic RNA; (ii) some regions with presumed relevant functions are strictly preserved and, (iii) the geographic origin of the isolates and the host species apparently have a bearing on the sequence variability of the viroid. This study records the presence of PBCVd in Turkey and confirms that its geographic distribution has been underestimated, most likely because the majority of infected pear cultivars are symptomless.

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