Iron chelate applications improve productivity and fruit quality at harvest and during cold storage of Actinidia chinensis var. chinensis (‘Hort16A’) kiwifruit growing in high-pH calcareous soils

Kiwifruits at 3 stages of ripening were stored at 3°C for 4 weeks to study the effect of cold storage on ethylene production and fruit quality. Samples taken weekly were analyzed for firmness, TSS, acidity, tissue chlorophyll and carbohydrate contents. Fruits at early stage of ripening (hard) produced less ethylene than fruits at late ripening stage (soft). Fruit quality attributes vary significantly among the different ripening stages and storage intervals.

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Iron Deficiency Chlorosis and Seed Yield in Dry Edible Beans Grown on High-pH Calcareous Soils

HortScience ◽

10.21273/hortsci.33.3.444f ◽

1998 ◽

Vol 33 (3) ◽

pp. 444f-445

Author(s):

J.W. Gonzales ◽

D.P. Coyne ◽

W.W. Stroup

Keyword(s):

Iron Deficiency ◽

Chlorophyll Content ◽

Seed Yield ◽

Calcareous Soils ◽

Yield Reduction ◽

Iron Deficiency Chlorosis ◽

Breeding Lines ◽

High Ph ◽

The Third ◽

Content Index

Iron deficiency chlorosis (FeDC) can cause significant seed yield reduction in dry beans (Phaseolus vulgaris L.) grown on high-pH calcareous soils. To determine the effects of FeDC on seed yield, and the effect of Fe-spray as a correction factor for FeDC, 22 breeding lines/cultivars were planted on high-pH (8.0), calcareous (3.2–3.5 calcium carbonate equivalent), and low-Fe (1.8–4.2 ppm DTPA) sandy clay loam Tripp soils at Mitchell and Scottsbluff in western Nebraska. A split-plot design was used with Fe treatments as main plots and breeding lines/cultivars as subplots. Three foliar sprays of Fe-EDDHA (2.4 kg·ha–1) were applied at V4, R5, and R7 dry bean growth stages, during 1996 and 1997. Leaf chlorosis was measured simultaneously by using a Minolta Chroma-meter (CIE L* a* b* color space system), a Minolta Chlorophyll-meter (chlorophyll content index), and by visual ratings (1 = normal green to 5 = severe chlorosis). In 1996 no significant Fe-spray × line interaction (P = 0.776) and Fe-spray effect (P = 0.884) on seed yield was observed. Breeding lines showed significant differences in seed yield (P = 0.0001) with WM2-96-5 being the highest-yielding line (4047 kg·ha–1). In 1997 a significant Fe spray × line interaction (P = 0.029) was observed. The cultivar Chase without Fe spray (3375 kg·ha–1), and lines WM2-96-5 (3281 kg·ha–1), WM2-96-8 (3171 kg·ha–1) with Fe spray were the highest yielding entries under those treatments. Differences in visual ratings after the third Fe spray in 1997 were significant (P = 0.004) for Fe spray × line interaction. In 1996 visual ratings were different only for breeding lines. Chlorophyll content index showed a significant Fe spray × line interaction after the second Fe spray (P = 0.022) and after the third Fe spray (P = 0.0003) in 1997.

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Efficacy of coupling gamma irradiation with calcium chloride and lemongrass oil in maintaining guava fruit quality and inhibiting fungal growth during cold storage

Folia Horticulturae ◽

10.2478/fhort-2018-0007 ◽

2018 ◽

Vol 30 (1) ◽

pp. 67-78 ◽

Cited By ~ 2

Author(s):

Ramadan A. Hassanein ◽

Ehab A. Salem ◽

Ahmed A. Zahran

Keyword(s):

Vitamin C ◽

Fruit Quality ◽

Cold Storage ◽

Fungal Growth ◽

Alternaria Solani ◽

Titratable Acidity ◽

Soluble Solids ◽

Γ Irradiation ◽

Lemongrass Oil

AbstractThis study was performed to explore the efficacy of combining more than one postharvest treatment in maintaining some quality attributes and reducing fungal pathogenicity in cold-stored guava fruits. The investigated postharvest treatments included the control, CaCl2(4%), lemongrass oil (2 dm3kg−1), gamma (γ) irradiation (0.2, 0.4 and 0.6 kGy), 0.4 kGy γ irradiation + CaCl2(4%), and 0.4 kGy γ irradiation + lemongrass oil (2 dm3kg−1). The studied physiochemical attributes included weight loss, decay percentage, fruit firmness, total soluble solids (TSS), titratable acidity (TA), and vitamin C content. Different fungal species were also isolated from decayed fruits and were identified asAlternaria alternata,Alternaria solani,Aspergillus niger,Botrytis cinerea,Fusarium solaniandRhizopus stolonifer. The severity of infection for the different fungi was determined, and anin vitroantifungal assay was conducted for lemongrass oil. All the investigated treatments generally reduced decay and water loss percentages, and controlled TSS, TA and vitamin C decrements that occurred during cold storage. On the other hand, higher irradiation doses generally increased fruit softness, and the 0.4 kGy γ dose did not contribute to the overall fruit quality when coupled with CaCl2and lemongrass oil, compared to CaCl2and lemongrass oil treatments alone.

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Effects of 1-methylcyclopropene and gaseous ozone on Listeria innocua survival and fruit quality of Granny Smith apples during long-term commercial cold storage

Food Microbiology ◽

10.1016/j.fm.2021.103922 ◽

2021 ◽

pp. 103922

Author(s):

Lina Sheng ◽

Xiaoye Shen ◽

Yuan Su ◽

Yansong Xue ◽

Hui Gao ◽

...

Keyword(s):

Fruit Quality ◽

Cold Storage ◽

Listeria Innocua ◽

Gaseous Ozone

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Fruit quality preservation of 'Laetitia' plums under controlled atmosphere storage

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201420130237 ◽

2014 ◽

Vol 86 (1) ◽

pp. 485-494 ◽

Cited By ~ 5

Author(s):

CRISTIANO ANDRÉ STEFFENS ◽

CASSANDRO V.T. DO AMARANTE ◽

ERLANI O. ALVES ◽

AURI BRACKMANN

Keyword(s):

Fruit Quality ◽

Cold Storage ◽

Ethylene Production ◽

Titratable Acidity ◽

Storage Conditions ◽

Controlled Atmosphere ◽

Controlled Atmosphere Storage ◽

Red Color ◽

High Incidence ◽

Atmosphere Storage

The objective of this study was to evaluate the effect of controlled atmosphere (CA) on quality preservation of ‘Laetitia’ plums, mainly on internal breakdown, in order to determine the best CA storage conditions. Two experiments were carried out one in 2010, and another in 2011. In 2010, besides cold storage (CS; 21.0 kPa O2 + 0.03 kPa CO2), the fruits were stored under the following CA conditions (kPa O2+kPa CO2): 1+3, 1+5, 2+5, 2+10, and 11+10. In 2011, the fruits were stored under CS and CA of 1+0, 1+1, 2+1, and 2+2. The fruit stored under different CA conditions had lower respiration and ethylene production, better preservation of flesh firmness, texture and titratable acidity, lower skin red color, and lower incidence of skin cracking than the fruit in CS. In 2010, the fruit under CA with 2+5, 1+5, and 1+3 had a pronounced delay in ripening, although it exhibited a high incidence of internal breakdown. In 2011, the CA conditions with 2+1 and 2+2 provided the best delay in ripening and a reduced incidence of internal breakdown. The best CA condition for cold storage (at 0.5°C) of ‘Laetitia’ plums is 2 kPa O2 + 2 kPa CO2.

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Between-tree variation in fruit quality and fruit mineral concentrations of Hass avocados

Australian Journal of Experimental Agriculture ◽

10.1071/ea04051 ◽

2006 ◽

Vol 46 (9) ◽

pp. 1195 ◽

Cited By ~ 4

Author(s):

J. R. Marques ◽

P. J. Hofman ◽

A. H. Wearing

Keyword(s):

Fruit Quality ◽

Cold Storage ◽

Dry Matter ◽

Fruit Body ◽

Conclusive Evidence ◽

Skin Area ◽

Calcium Magnesium ◽

Hass Avocado ◽

Individual Trees ◽

Mineral Concentrations

Inconsistent internal fruit quality in Hass avocados affects consumer confidence. To determine the influence of individual trees on fruit quality, Hass avocado fruit were harvested from adjacent trees of similar external appearance in 3 commercial orchards in 1998 and 1 orchard in 1999. The trees in each orchard were grown with similar commercial practices and in similar soil types. Within each location, there were significant (P<0.05) differences in the mean ripe fruit quality between trees with respect to fruit body rot severity (mainly anthracnose) with and without cold storage, internal disorders severity due to diffuse discolouration and vascular browning (after cold storage), days to ripen, percentage dry matter, and the percentage of the skin area with purple-black colour when ripe. These effects were also noted in the same orchard in 1999. There were significant (P<0.05) differences in fruit flesh calcium, magnesium, potassium, boron and zinc concentrations between trees. Significant (P<0.05) correlations were observed between average fruit mineral concentrations in each tree (particularly calcium, magnesium and potassium) and body rot severity, percentage dry matter and fruit mass. There was little conclusive evidence that characteristics such as the growth of the non-suberised roots or the degree of scion under- or overgrowth was involved in these tree effects; however, differences between trees with respect to other rootstock characteristics may be involved. The inconsistency of the correlations across sites and years suggested that other factors apart from tree influences could also affect the relationship between fruit minerals and fruit quality.

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