Effect of Temperature on Activities of Cell Wall Enzymes of Kiwifruit during the Shelf Life

2014 ◽  
Vol 997 ◽  
pp. 150-153
Author(s):  
Yan Fang Pan ◽  
Huan Huan Chen ◽  
Xi Hong Li ◽  
Hua You Chen ◽  
Wei Wang ◽  
...  
Keyword(s):  
Cell Wall ◽  
Low Temperature ◽  
Shelf Life ◽  
Effect Of Temperature ◽  
Enzymes Activity ◽  
Activity Peak ◽  
Cell Wall Enzymes ◽  
Low Temperature Treatments

Taking kiwifruits stored 60 days at 0°C as material, studied on the effect of three temperature treatments on hardness and cell wall enzymes activity during the shelf life. The results indicated that the time of firmness decreased to 3 kg·cm-2 at 0°C extended 17 days and 29 days than at 10°Cand at 20°C respectively. Low temperature treatments could effectively inhibited PG, Cx and PE activities, thus extended shelf life. The time of PG activity reached the peak at 0°C was 28 days, later than at10°C and at 20°C by 16 days and 20 days respectively . The Cx activity peak at 0°C was 1.31×103 μg/h·g and much smaller than at 10°C 1.77×103μg/h·g and at 20°C 1.95×103μg/h·g. PE activity of 0°C has remained the lowest state after three days. So The best treatment was 0°C.

Increase of inverse beta of Si transistors due to low-temperature treatments

1979 ◽  
Vol 15 (10) ◽  
pp. 282 ◽  
Author(s):  
Mariano Aceves ◽  
L. don Kendall
Keyword(s):  
Low Temperature ◽  
Low Temperature Treatments

scholarly journals High-CO2 Treatment Prolongs the Postharvest Shelf Life of Strawberry Fruits by Reducing Decay and Cell Wall Degradation

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1649
Author(s):  
Hyang-Lan Eum ◽  
Seung-Hyun Han ◽  
Eun-Jin Lee
Keyword(s):  
Cell Wall ◽  
Shelf Life ◽  
Physiological Mechanism ◽  
Pectate Lyase ◽  
Pectin Methylesterase ◽  
Cell Wall Degradation ◽  
Cell Wall Degrading Enzymes ◽  
High Co2 ◽  
Genes Encoding ◽  
Co2 Treatment

Improved methods are needed to extend the shelf life of strawberry fruits. The objective of this study was to determine the postharvest physiological mechanism of high-CO2 treatment in strawberries. Harvested strawberries were stored at 10 °C after 3 h of exposure to a treatment with 30% CO2 or air. Pectin and gene expression levels related to cell wall degradation were measured to assess the high-CO2 effects on the cell wall and lipid metabolism. Strawberries subjected to high-CO2 treatment presented higher pectin content and firmness and lower decay than those of control fruits. Genes encoding cell wall-degrading enzymes (pectin methylesterase, polygalacturonase, and pectate lyase) were downregulated after high-CO2 treatment. High-CO2 induced the expression of oligogalacturonides, thereby conferring defense against Botrytis cinerea in strawberry fruits, and lowering the decay incidence at seven days after its inoculation. Our findings suggest that high-CO2 treatment can maintain strawberry quality by reducing decay and cell wall degradation.

scholarly journals The effect of a novel low temperature-short time (LTST) process to extend the shelf-life of fluid milk

SpringerPlus ◽  
2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Phillip R. Myer ◽  
Kyle R. Parker ◽  
Andrew T. Kanach ◽  
Tengliang Zhu ◽  
Mark T. Morgan ◽  
...  
Keyword(s):  
Low Temperature ◽  
Shelf Life ◽  
Short Time ◽  
Fluid Milk

Strawberry Shelf Life, Composition, and Enzymes Activity in Response to Edible Chitosan Coatings

2016 ◽  
Vol 17 (2) ◽  
pp. 117-136 ◽  
Author(s):  
Mohamed E. I. Badawy ◽  
Entsar I. Rabea ◽  
Mahmoud A. M. El-Nouby ◽  
Rania I. A. Ismail ◽  
Nehad E. M. Taktak
Keyword(s):  
Shelf Life ◽  
Enzymes Activity

scholarly journals Synthesis of Lipid-Carbohydrate-Peptidyl-RNA Conjugates to Explore the Limits Imposed by the Substrate Specificity of Cell Wall Enzymes on the Acquisition of Drug Resistance

2018 ◽  
Vol 24 (56) ◽  
pp. 14911-14915 ◽  
Author(s):  
Matthieu Fonvielle ◽  
Ahmed Bouhss ◽  
Coralie Hoareau ◽  
Delphine Patin ◽  
Dominique Mengin-Lecreulx ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Cell Wall ◽  
Substrate Specificity ◽  
Cell Wall Enzymes

scholarly journals Postharvest quality of pepino melon (Solanum muricatum Aiton) as influenced by NPK fertilizer rates, growing environment and storage temperature

2021 ◽  
Vol 35 (1) ◽  
Author(s):  
Carol Mutua ◽  
Joshua Ogweno ◽  
Robert Gesimba
Keyword(s):  
Low Temperature ◽  
Shelf Life ◽  
Room Temperature ◽  
Postharvest Quality ◽  
Solanum Muricatum ◽  
Npk Fertilizer ◽  
And Storage ◽  
Fertilizer Rates ◽  
Storage Temperatures

The present study evaluated the effect of NPK fertilizer (17:17:17) rates (0, 100, 200, 300 and 400 kg ha-1) on the postharvest quality of field and greenhouse grown pepino melons (Solanum muricatum Ait.) stored at room temperature (15-22°C) and at low temperature (7°C). The study was carried out in randomized complete block design with fruits from the field and greenhouse, five NPK fertilizer rates as treatments and the two storage temperatures replicated three times. Data were collected on percentage fruit weight loss (PWL), total soluble solids (TSS), firmness and shelf life. Results indicated that greenhouse and field grown fruits from the control and plants supplied with 100 kg NPK ha-1 had low PWL at both storage temperatures. Field grown fruits from the control stored at room temperature had the highest TSS and were firmer after 28 days of storage. Field grown fruits not supplied with fertilizer and stored at low temperature had a shelf life of 27 and 26 days in trial one and two respectively. Application of 100 kg NPK ha-1 and storage of pepino melon fruits at low temperature can be used to enhance quality and shelf life.

scholarly journals THE ROLE OF POTASSIUM AND CALSIUM IN IMPROVING THE QUALITY AND SHELF LIFE OF TOMATO (Lycopersicum esculentum var. servo)

el–Hayah ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 84-93
Author(s):  
Puguh Catur Wicaksana ◽  
Ketut Anom Wijaya ◽  
Sigit Soeparjono
Keyword(s):  
Cell Wall ◽  
Shelf Life ◽  
Cell Wall Regeneration ◽  
Cross Link ◽  
Tomato Production ◽  
High Productivity ◽  
Long Duration ◽  
High Respiration Rate ◽  
Quality And Shelf Life

Tomato has the characteristics natural to damage. Damage fruits are caused by destitute of fruit quality and sensory attributes. The loss of tomato production on harvest in developing countries reached 50% due to the long duration of tomato distribution. Servo varieties of tomatoes are in demand by farmers because of their genetic advantages, high productivity, and abundant fruit weights. The shortage of servo varieties of tomatoes is the short shelf life of fruit, which is seven days after harvest. Short shelf life is influenced by fruit thickness and fruit hardness. In improving the quality and shelf life of tomatoes, potassium (K) nutrition plays a role in photosynthetic translocation, strengthens the cell wall, and involved in the lignification process of sclerenchyma tissue. Tomatoes, as climacteric fruits have a high respiration rate influenced by ethylene. Ethylene production can be inhibited by calcium chloride (CaCl2) application by strengthening the cell wall mechanism, cross-link with pectin, and increase the cell wall regeneration can change the texture of the fruit become harder, and it reduces sensitivity to physiological damage. Based on the treatment of this research, the quality and shelf life of servo varieties of tomato is increased.

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