The potential to retard postharvest senescence using biotechnology

2007 ◽  
Vol 3 (2) ◽  
pp. 1-6
Author(s):  
Amnon Lers and Shaul Burd
Keyword(s):  
Postharvest Senescence

scholarly journals Physicochemical characterisation of the postharvest senescence of the winter melon "Tendral"

Fruits ◽  
2001 ◽  
Vol 56 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Maria da Graça Barreiro ◽  
Fernando Cebola Lidon ◽  
Manuela Pinto
Keyword(s):  
Physicochemical Characterisation ◽  
Postharvest Senescence

Pre-storage fumigation with hydrogen sulphide inhibits postharvest senescence of Valencia and Navel oranges and ‘Afourer’ mandarins

2020 ◽  
Vol 95 (6) ◽  
pp. 757-762
Author(s):  
Nasiru Alhassan ◽  
Ron B. H. Wills ◽  
Michael C. Bowyer ◽  
John B. Golding ◽  
Penta Pristijono
Keyword(s):  
Hydrogen Sulphide ◽  
Postharvest Senescence

Involvement of ethylene in postharvest senescence of Boronia heterophylla flowers

1999 ◽  
Vol 39 (7) ◽  
pp. 911 ◽  
Author(s):  
A. J. Macnish ◽  
P. J. Hofman ◽  
D. C. Joyce ◽  
D. H. Simons
Keyword(s):  
Ethylene Production ◽  
Flower Senescence ◽  
Vase Life ◽  
Fresh Weight ◽  
Endogenous Ethylene ◽  
Pre Treatment ◽  
Postharvest Senescence

Summary. Treatment of cut flowering Boronia heterophylla (red boronia) stems with 10 L ethylene/L for 72 h at 20°C induced flower senescence and abscission, and thereby reduced stem fresh weight and vase life. Pre-treatment with 1-methylcyclopropene (1-MCP) reduced these ethylene effects. Treatment of B. heterophylla with 10 L ethylene/L for a shorter 12 h period at 20°C did not affect vase life. Rates of endogenous ethylene production by B. heterophylla flowers increased in association with wilting during flower senescence.

The degradation of chloroplast components during postharvest senescence of broccoli florets is delayed by low-intensity visible light pulses

2020 ◽  
Vol 168 ◽  
pp. 111249
Author(s):  
Alejandra Bárcena ◽  
José Vera Bahima ◽  
Victoria Casajús ◽  
Gustavo Martínez ◽  
Diana Lauff ◽  
...  
Keyword(s):  
Visible Light ◽  
Low Intensity ◽  
Light Pulses ◽  
Postharvest Senescence

scholarly journals Hydrogen Sulfide Alleviates Postharvest Senescence of Grape by Modulating the Antioxidant Defenses

2016 ◽  
Vol 2016 ◽  
pp. 1-14 ◽  
Author(s):  
Zhi-Jing Ni ◽  
Kang-Di Hu ◽  
Chang-Bing Song ◽  
Run-Hui Ma ◽  
Zhi-Rong Li ◽  
...  
Keyword(s):  
Antioxidant Enzymes ◽  
Hydrogen Sulfide ◽  
Titratable Acidity ◽  
Soluble Solids ◽  
Antioxidant Defenses ◽  
Carotenoid Content ◽  
Water Control ◽  
Chlorophyll Breakdown ◽  
S Application ◽  
Postharvest Senescence

Hydrogen sulfide (H2S) has been identified as an important gaseous signal in plants. Here, we investigated the mechanism of H2S in alleviating postharvest senescence and rotting of Kyoho grape. Exogenous application of H2S released from 1.0 mM NaHS remarkably decreased the rotting and threshing rate of grape berries. H2S application also prevented the weight loss in grape clusters and inhibited the decreases in firmness, soluble solids, and titratable acidity in grape pulp during postharvest storage. The data of chlorophyll and carotenoid content suggested the role of H2S in preventing chlorophyll breakdown and carotenoid accumulation in both grape rachis and pulp. In comparison to water control, exogenous H2S application maintained significantly higher levels of ascorbic acid and flavonoid and total phenolics and reducing sugar and soluble protein in grape pulp. Meanwhile, H2S significantly reduced the accumulation of malondialdehyde (MDA), hydrogen peroxide (H2O2), and superoxide anion (O2∙-) in grape pulp. Further investigations showed that H2S enhanced the activities of antioxidant enzymes ascorbate peroxidase (APX) and catalase (CAT) and decreased those of lipoxygenase (LOX) in both grape peels and pulp. In all, we provided strong evidence that H2S effectively alleviated postharvest senescence and rotting of Kyoho grape by modulating antioxidant enzymes and attenuating lipid peroxidation.

scholarly journals Physiological changes during postharvest senescence of broccoli

1999 ◽  
Vol 34 (9) ◽  
pp. 1565-1569 ◽  
Author(s):  
Fernando Luiz Finger ◽  
Laurício Endres ◽  
Paulo Roberto Mosquim ◽  
Mário Puiatti
Keyword(s):  
Weight Loss ◽  
Relative Humidity ◽  
Chlorophyll Content ◽  
Reducing Sugars ◽  
Physiological Changes ◽  
Sharp Reduction ◽  
Total Head ◽  
Initial Content ◽  
Brassica Oleracea L ◽  
Postharvest Senescence

The objective of this work was to determine the early physiological changes throughout shelf life of fresh broccoli (Brassica oleracea L. var. italica) cv. Piracicaba Precoce at 25ºC and relative humidity of 96% in the dark until complete senescence. Head inflorescences showed lack of turgidity and commercial value when weight loss reached up to 5%, coinciding with 48 hour after harvest. Chlorophyll content was stable until 24 hours after harvesting; afterwards, an intense degradation phase took place. At 72 hours, total head yellowing was observed when chlorophyll content dropped to 30% of its initial content. Peroxidase activity increased by 1.4 fold during the first six hours, dropping to its lowest level approximately 24 hours after harvesting. However, from this time on, an increment of activity was observed until 72 hours. At 24 hours after harvesting, respiration was reduced by 50%. At later stages of senescence, respiration of florets was stable, but in a lower level than that determined at harvest. Sharp reduction of starch and reducing sugars was observed within 24 hours after harvesting, followed by continuous period of decline in starch and non-reducing sugars.

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