Effect of Preharvest Calcium Treatments on Sweet Cherry Fruit Quality

WOS: 000337716800024In this study, the effects of different foliar calcium compounds on fruit cracking and quality of sweet cherry variety '0900 Ziraat' were investigated. Calcium caseinate, calcium chloride, calcium hydroxide and calcium nitrate were used as foliar sprays. Calcium applications reduced the cracking index 38% to 66% compared to cherries that did not receive foliar treatment. The most efficient applications for decreasing cracking were calcium hydroxide and calcium chloride. Calcium chloride and calcium hydroxide were determined to be the most effective compounds, reducing cracking by 62% and 66%, respectively. Calcium caseinate also decreased fruit cracking, by nearly 50% compared to the control. However, the leaves and fruit were covered with white film. This white film can be easily removed, as postharvest processing of cherries uses water, and normally no residue remains. Preharvest foliar calcium treatments significantly decreased fruit cracking, but cracking may not be completely eliminated. None of the calcium compounds affected removal force, average fruit weight, total soluble solids, or titratable acidy. Another potentially important finding was that foliar treatment with calcium chloride significantly increased firmness of sweet cherry fruit. Calcium chloride application increased the firmness of cherries by an average of 12% compared to other compounds

The effect of preharvest gibberellic acid applications on fruit quality of 'Angelino' plums during storage

WOS: 000374611000016High-performance preharvest treatments can ensure maintenance of quality during storage. In this study, gibberellic acid (GA(3)) was applied on the trees in the preharvest stage to study its effects on the storage potential of the 'Angelino' plums. The treatment was applied at 50 and 75 mg/L concentrations, on the 8th, 10th, 12th and 14th 'week after anthesis' (WAA). The results of the GA(3) applications on the 'Angelino' plum quality after 90 days of storage and an additional 2 days of shelf life showed a decrease in weight loss, with a corresponding increase in fruit flesh firmness, total soluble solids and titratable acidity with the treatment. The fruit skin hue values were higher in the GA(3) treated plums, whereas no change was observed in the total antioxidant activity and total phenol contents. Overall, the effect of the preharvest GA3 application on the 'Angelino' plum quality during storage at 0 +/- 0.5 degrees C and 90-95% relative humidity for 90 days was positive. (C) 2016 Elsevier B.V. All rights reserved.Ege University Scientific Research FundEge University [2010 ZRF 048]This work was supported by Ege University Scientific Research Fund (contract no: 2010 ZRF 048)

Effect of pre-harvest salicylic acid treatments on the quality and shelf life of the ‘Cresthaven’ peach cultivar

A good peach fruit should have properties of high quality, as these properties directly affect the shelf life. This study aims to determine the effects of different salicylic acid (SA) treatments in the pre-harvest period on the 'Cresthaven' peach cultivar on the fruit quality at harvest and after storage at 2 degrees C (8 days) plus shelf life at 20 degrees C (2 days). Fruits with SA treatments have better characteristics such as fruit weight, fruit flesh firmness, total antioxidant content, total phenol content and titratable acidity level at harvest and after storage plus shelf life. With treatments, no changes were observed in the total soluble solids both at harvest and after storage plus shelf life. SA treatments decreased loss of fruit flesh firmness and loss of acidity after shelf life, compared with the control. in fruits with 2 mM SA acid treatment, the reduction in fruit firmness and acidity loss were the least, and as a result of the study it was determined as the most effective pre-harvest SA concentration that could be used in the 'Cresthaven' peach variety

Effect of pre-harvest salicylic acid treatments on the quality and shelf life of the ‘Cresthaven’ peach cultivar

A good peach fruit should have properties of high quality, as these properties directly affect the shelf life. This study aims to determine the effects of different salicylic acid (SA) treatments in the pre-harvest period on the ‘Cresthaven’ peach cultivar on the fruit quality at harvest and after storage at 2°C (8 days) plus shelf life at 20°C (2 days). Fruits with SA treatments have better characteristics such as fruit weight, fruit flesh firmness, total antioxidant content, total phenol content and titratable acidity level at harvest and after storage plus shelf life. With treatments, no changes were observed in the total soluble solids both at harvest and after storage plus shelf life. SA treatments decreased loss of fruit flesh firmness and loss of acidity after shelf life, compared with the control. In fruits with 2 mM SA acid treatment, the reduction in fruit firmness and acidity loss were the least, and as a result of the study it was determined as the most effective pre-harvest SA concentration that could be used in the ‘Cresthaven’ peach variety

GENETIC DIVERSITY ANALYSIS OF Hericium ISOLATES BY ISSR and SRAP MARKERS

WOS: 000455216600017Inter Simple Sequence Repeats (ISSR) and Sequence-Related Amplified Polymorphism (SRAP) markers were applied for genomic fingerprinting of 8 Hericium isolates of Turkey and American origin. The ISSR, SRAP and combined ISSR/SRAP analyses based dendrograms were generated by the UPGMA method. Fifteen ISSR primers amplified a total of 154 bands of which 151 (97.4%) were polymorphic, whereas 16 SRAP primer combinations amplified 164 bands of which 156 (95.1%) were polymorphic. All the Hericium isolates analyzed was divided into three major clusters and H. americanum independently located on the one cluster in all dendograms. The dendrograms indicated a clear pattern of clustering and the 8 Hericium isolates showed significant differences suggesting that they were far to each other in genetic relation. These results demonstrated that both methods were highly effective for discriminating among species and strains of Hericium. Finally, to our knowledge, this is the first application of ISSR and SRAP markers on the systematics of Hericium isolates and these findings would benefit future research in Hericium spp.Ege University Research CouncilEge University [ZRF 043]This work was supported by the Ege University Research Council 2013 Grant No. ZRF 043

Effects of Modified Atmosphere Packaging and 1-Methylcyclopropene Treatment on Quality Properties of Japanese Plum Fruit (Prunus salicina Lindl. cv. 'Angeleno') During Cold Storage

The aim of this study was to determine the effects of 1-methylcyclopropene (1-MCP) and modified atmosphere (MAP) packaging on quality properties of plum (Prunus salicina Lindl. cv. 'Angeleno') during cold storage. The study comprised of six different applications as: (a) Control (b) 1-MCP, (c) MAP1, (d) MAP2, (e) 1-MCP + MAP1 and (f) 1-MCP + MAP2. 1-MCP was applied at the dose of 625 ppb at 2 +/- 0.5 degrees C for 24 h. The plum fruit were then stored at 90% relative humidity at 0 +/- 0.5 degrees C for 60 days. Samples were taken at 20-day intervals and kept an additional 2 days under shelf-life conditions to carry out measurements and analyses. In MAP treatments, the weight loss was significantly reduced during cold storage of plum fruits. Changes in fruit flesh firmness, color and overall appearance during storage were more limited in plums packed in MAP and receiving 1-MCP treatment. The respiration rate, ethylene production and decay rate were lower in MAP packages or 1-MCP treatments than in control fruits. The results show that 'Angeleno' plum fruit can be stored successfully for 120 + 2 days when packed in MAP after 1-MCP treatment.AcknowledgementsThis study was supported by the Scientific Research Projects (BAP) of the Ege University, Project No: 17-ZRF-004.Scientific Research Projects (BAP) of the Ege University [17-ZRF-004

Use of biotechnology for preserving rare fruit germplasm

15 pages.The application of recent biotechnological tools for conservation of rare fruit species from developing countries, including in vitro and hydroponic culture protocols, improved propagation techniques and molecular marker application, is described. Promising propagation methods include forcing germination of seeds, in-vitro protocols well adapted to these rare fruit species that allow the introduction, micropropagation and rooting of plant material, and developing hydroponic culture protocols that allow the early propagation of high-risk genotypes. In addition, the growth of seedlings in controlled environmental conditions in greenhouse and cold chamber provides a useful strategy for obtaining vigorously growing plants from seeds year round. A standard karyotyping protocol has been described working in several species as preliminary tool to start molecular (DNA) studies. In addition, different protocols for DNA isolation and quantification have been assayed in these rare fruit species. Molecular markers based on PCR amplification of the DNA have also become an essential tool for the characterization and conservation of these species. Regarding this PCR amplification of the DNA, two main strategies, RAPD (if the DNA sequence is unknown) and SSR markers (if the DNA sequence is known), have been assayed. These markers have been applied in the genetic characterization of this germplasm, the establishment of genetic relationships between cultivars and species, and the future construction of genetic maps of these rare fruit species. Additional advantages encouraging the utilization of these new technologies in breeding programs include the high levels of synteny between genomes of related species, and a well-established international network of cooperation among researchers.Peer reviewe