Search PubMed⌕ Search
Home/Archive/PubMed

PubMed · 10646562

Calcium chloride sprays decrease physiological disorders following long-term cold storage of apple.

R Dris·R Niskanen
View original source ↗Export metadata ↓

Abstract

Field experiments were carried out at the Horticultural Research Institute, and in five commercial apple orchards, located in southwest Finland including the Aland Islands during 1994 and 1995. The experimental cultivars were Melba, Raike, Red Atlas, Akerö, Aroma, and Lobo. The treatments were untreated control and preharvest calcium chloride (CaCl2) sprays at Ca 2.0 g/l. Fruit samples were stored for two to six months at 2-4 degrees C and 85-95% RH. The percentage of the incidence of physiological disorders of stored apples was scored. Fruit macronutrients, firmness, diameter and juice titratable acidity and percentage of soluble solids were determined. Only a few nutrient effects in the flesh of the apple cultivars were a result of CaCl2 sprayings. Preharvest CaCl2 sprays increased fruit firmness and the titratable acidity but decreased soluble solids, soluble solids/titratable acidity ratio, and the incidence of physiological storage disorders of some cultivars. When looking at the mean of all cultivars, CaCl2 sprayings increased titratable acidity and decreased soluble solids/titratable acidity ratio after four months of storage during 1995 and reduced the incidence of physiological disorders after three months of storage during 1994 and after four months of storage in 1995.

Explore related subjects

Calcium ChlorideFinlandFood ContaminationFood TechnologyFruitNutritive ValueResearchRosalesJournal ArticleResearch Support, Non-U.S. Gov't

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

R Dris, R Niskanen. 1999. Calcium chloride sprays decrease physiological disorders following long-term cold storage of apple.. https://doi.org/10.1023/a%3A1008171909458

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2001

Multiple cellular processes affected by the absence of the Rpb4 subunit of RNA polymerase II contribute to the deficiency in the stress response of the yeast rpb4(delta) mutant.

We previously described the isolation of yeast mutants (sex mutants) that secrete reduced amounts of mature alpha-factor when it is synthesized as part of a fusion with prosomatostatin. In the present study we show that the sex3-1 mutant displays pleiotropic phenotypes. These include an abnormal morphology, an osmoremediable caffeine sensitivity, reduced secretion of mature alpha-factor, a weakened cell wall and a marked deficiency in halotolerance. Cloning of the SEX3 gene revealed that it is identical to the RPB4 gene. This gene encodes the fourth largest subunit of yeast RNA polymerase II, which has been postulated to play a major role in the response to stress. We show that transcriptional activation in response to either a cell wall stress or to growth in the presence of elevated salt concentrations is minimally affected by the loss of RPB4 function. However, whereas the levels of several mRNAs are similarly reduced (by about 30%) in rpb4 mutants grown in rich medium at moderate temperature, some transcripts, in particular ZDS1, are more abundant. An increase dosage of ZDS1, or of genes involved in cell wall assembly and in secretion (RHO1 and SR077, respectively), partially suppresses the sensitivity of rpb4delta cells to high temperature, heat shock and stationary phase. Collectively, our results indicate that the loss of Rpb4p perturbs several cellular functions that contribute to the inappropriate stress response of rpb4delta yeast. We therefore conclude that this RNA poiymerase II subunit is not specifically involved in the stress response.

Calcium Chloride↗