Exogenous phenylalanine application promotes chilling tolerance in tomato fruits during cold storage by ensuring supply of NADPH for activation of ROS scavenging systems

2019 ◽  
Vol 246 ◽  
pp. 818-825 ◽  
Author(s):  
Morteza Soleimani Aghdam ◽  
Mohsen Moradi ◽  
Farhang Razavi ◽  
Vali Rabiei
2009 ◽  
Vol 74 (5) ◽  
pp. C348-C352 ◽  
Author(s):  
D.Y. Zhao ◽  
L. Shen ◽  
B. Fan ◽  
K.L. Liu ◽  
M.M. Yu ◽  
...  

2017 ◽  
Vol 133 ◽  
pp. 26-35 ◽  
Author(s):  
Fátima Carvajal ◽  
Francisco Palma ◽  
Raquel Jiménez-Muñoz ◽  
Manuel Jamilena ◽  
Amada Pulido ◽  
...  

Antioxidants ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 115
Author(s):  
Songshen Hu ◽  
Tonglin Wang ◽  
Zhiyong Shao ◽  
Fanliang Meng ◽  
Hao Chen ◽  
...  

Tomato is susceptible to chilling injury during cold storage. In this study, we found that low temperature promoted the expression of brassinosteroid (BR) biosynthetic genes in tomato fruits. The overexpression of SlCYP90B3 (SlCYP90B3-OE), a key BR biosynthetic gene, alleviated the chilling injury with decreased electrical conductivity and malondialdehyde. In SlCYP90B3-OE tomato fruits, the activities of antioxidant enzymes, including ascorbate peroxidase (APX), catalase (CAT), peroxidase (POD), and superoxide dismutase (SOD), were markedly increased, while the activity of membranous lipolytic enzymes, lipoxygenase (LOX), and phospholipase D (PLD), were significantly decreased when compared with the wild-type in response to cold storage. Furthermore, the expression level of the cold-response-system component, SlCBF1, was higher in SlCYP90B3-OE fruits than in the wild-type fruits. These results indicated that SlCYP90B3 might be involved in the chilling tolerance of tomato fruits during cold storage, possibly by regulating the antioxidant enzyme system and SlCBF1 expression.


2019 ◽  
Vol 254 ◽  
pp. 222-227 ◽  
Author(s):  
Yavar Sharafi ◽  
Morteza Soleimani Aghdam ◽  
Zisheng Luo ◽  
Abbasali Jannatizadeh ◽  
Farhang Razavi ◽  
...  

Cryobiology ◽  
1998 ◽  
Vol 36 (3) ◽  
pp. 213-224 ◽  
Author(s):  
Roger A. Leopold ◽  
Robert R. Rojas ◽  
Peter W. Atkinson

2013 ◽  
Author(s):  
Edna Pesis ◽  
Elizabeth J. Mitcham ◽  
Susan E. Ebeler ◽  
Amnon Lers

There is increased demand for high quality fruit produced and marketed with reduced chemical inputs to minimize toxic effects on human health and the environment. Granny Smith (GS) apple quality is reduced by two major physiological disorders, superficial scald and bitter pit (BP). These disorders cause great loss to apple growers worldwide. Superficial scald is commonly controlled by chemical treatments, mainly the antioxidant diphenylamine (DPA) and/or the ethylene action inhibitor, 1-methylcyclopropene (1–MCP). Both chemicals are ineffective in controlling bitter pit incidence. We proposed to investigate the beneficial use of non-chemical, abiotic stress with low O2 (LO2) applied for 10d at 20°C on GS apple fruit. During the project we expanded the treatment to more apple cultivars, Golden Delicious (GD) and Starking Delicious (SD) and another pome fruit, the pear. Apple and pear have similar physiological disorders that develop during cold storage and we examined if the LO2 treatment would also be effective on pear. Application of 0.5% LO2 atmosphere for 10d at 20°C or 500ppb 1-MCP at 20°C prior to cold storage at 0°C, was effective in reducing superficial scald in GS apple. Moreover, LO2 pretreatment was also effective in reducing bitter pit (BP) development in California GS and Israeli GD and SD apples The BP symptoms in GS from California were much more prominent, so the effect of LO2 was more dramatic than the effect on the Israeli cvs. GD and SD, nevertheless the LO2 treatment showed the same trend in all cultivars in reducing BP. The LO2 and 1-MCP -treated fruit exhibited lower levels of ethylene, - farnesene and its oxidation product, 6-methyl-5-hepten-2-one (MHO), as determined by SPME/GC-MS analysis. In addition, LO2 pretreatment applied to California Bartlett or Israeli Spadona pears was effective in reducing superficial scald, senescent scald and internal breakdown after 4 m of cold storage at 0°C. For GS apple, low-temperature storage resulted in oxidative stress and chilling injury, caused by increased production of superoxide anions which in turn led to the generation of other dangerous reactive oxygen species (ROS). Using confocal laser-scanning microscopy and H2O2 measurements of apple peel, we observed ROS accumulation in control fruit, while negligible amounts were found in LO2 and 1-MCP treated fruit. Gene-expression levels of ROS-scavenging enzymes were induced by the various pretreatments: catalase was induced by LO2 treatment, whereas Mn superoxide dismutase was induced by 1-MCP treatment. We assume that LO2 and 1-MCP pretreated fruit remained healthier due to reduced production of ethylene and reactive oxygen substances, such as MHO, during cold storage. The LO2-treated apple exhibited greener peel and firmer fruit after 6 m of cold storage, and the fruit had high crispiness leading to high taste preference. In both pear cultivars, the LO2 treatment led to a reduction in internal breakdown and browning around the seed cavity. We tested the LO2 pre-storage treatment on a semi-commercial scale that would be applicable to a small organic grower by sealing the fruit within the plastic field bins. The treatment was most effective with a continuous flow of nitrogen through the bins; however, a single 6 hour flush of nitrogen was also fairly effective. In addition, we determined that it was very important to have the oxygen levels below 0.5% for approximately 10 days to achieve good scald control, not counting the time required to reduce the oxygen concentration. Our LO2 technology has been proven in this project to be effective in reducing several physiological disorders developed in pome fruit during cold storage. We hope that our non-chemical treatment which is friendly to the environment will be used in the near future for the organic apple and pear industry. The next step should be an analysis of the cost-benefits and commercial feasibility.


2021 ◽  
Vol 53 (6) ◽  
Author(s):  
Lizi Zhao ◽  
Yingjie Zhang ◽  
Wenjiao Guo ◽  
Meixia Liang ◽  
Hongxia Zhang ◽  
...  

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