Balance between oxidative stress and the antioxidant system is associated with the level of cold tolerance in sweet potato roots

Araújo, Nícolas Oliveira de; Santos, Mirelle Nayana de Sousa; Araújo, Fernanda Ferreira de; Véras, Mário Leno Martins; Tello, Jean Paulo de Jesus; Arruda, Rafaela da Silva; Fugate, Karen Klotz; Finger, Fernando Luíz

doi:10.1016/j.postharvbio.2020.111359

Cited by 18 publications

(5 citation statements)

References 43 publications

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“…Throughout this process, the antioxidant defense system, comprising both enzymatic and non-enzymatic antioxidants, is activated to scavenge excessive ROS, thereby preventing cellular damage ( Nie et al, 2020 ). Antioxidant capacity was reported to be related to the storage properties of different sweet potato cultivars ( de Araujo et al, 2021 ), while increased antioxidant enzyme activity was found to be positively correlated with sweet potato storability ( Tang et al, 2019 ). However, whether a correlation exists between antioxidant enzyme activity in sweet potato leaves and the storage properties of the tubers has not been determined.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have investigated the optimization of storage conditions during postharvest sweet potato storage; however, the nature of the endogenous factors that influence the storage characteristics of different sweet potato cultivars remains unclear ( Fan et al, 2015 ; Ji et al, 2017 ). de Araujo et al (2021) reported that cold-tolerant sweet potato cultivars have stronger antioxidant enzyme activities compared with those of cold-sensitive cultivars, suggestive of the important role of the antioxidant system in eliminating excessive ROS induced by low temperature. Additionally, under optimal storage temperatures, the activities of antioxidant enzymes increase in nectarines and broccoli, thereby prolonging the postharvest storage period ( Zhang Z. et al, 2009 ; Zhao et al, 2018 ), while greater antioxidant enzyme activity is also associated with better storage performance in sweet potato cultivars ( Tang et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars

et al. 2021

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Sweet potato decays easily due to its high respiration rate and reactive oxygen species (ROS) accumulation during postharvest storage. In this study, we explored the relationship between antioxidant capacity in leaves and storage properties in different sweet potato cultivars, the tuberous roots of 10 sweet potato cultivars were used as the experimental materials to analyze the storage property during storage at 11–15°C. According to the decay percentage after 290 days of storage, Xu 32 was defined as a storage-tolerant cultivar (rot percentage less than 25%); Xu 55-2, Z 15-1, Shangshu 19, Yushu, and Zhezi 3 as above-moderate storage-tolerant cultivars (rot percentage ranging from 25 to 50%); Sushu 16, Yanshu 5, and Hanzi as medium-storable cultivars (rot percentage 50–75%); and Yan 25 as a storage-sensitive cultivar (rot percentage greater than 75%). Meanwhile, analysis of the α-amylase activity in root tubers of the 10 sweet potato cultivars during storage indicated that α-amylase activity was lowest in the storage-tolerant cultivar Xu 32 and highest in the storage-sensitive cultivar Yan 25. Evaluation of antioxidant enzyme activities and ROS content in the leaves of these 10 cultivars demonstrated that cultivar Xu 32, which showed the best storage property, had higher antioxidant enzyme activity [superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), and peroxidase (POD)] but lower lipoxygenase (LOX) activity, hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents, and superoxide anion radical (O2⋅–) production rates compared with those of the storage-sensitive cultivar Yan 25 and the medium-storability cultivars Hanzi, Yanshu 5, and Sushu 16. Additionally, principal component analysis (PCA) suggested that sweet potato cultivars with different storage properties were clustered separately. Correlation and heat map analysis further indicated that CAT, APX, POD, and SOD activities were negatively correlated with α-amylase activity, while LOX activity and MDA and H2O2 contents were negatively correlated with the storage property of sweet potato. Combined, our findings revealed that storage property is highly correlated with antioxidant capacity in sweet potato leaves and negatively correlated with α-amylase activity in tuberous roots, which provides a convenient means for the screening of storage-tolerant sweet potato cultivars.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars

et al. 2021

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“…Osmoregulatory substances include soluble sugar (SS), soluble protein (SP), and proline (Pro) [ 4 ]. Low-temperature stress also produces excessive reactive oxygen species (ROS) in plants, and the accumulation of ROS damages biological macromolecules such as proteins, lipids, DNA, and cell membranes [ 5 ], leading to the peroxidation of lipid-unsaturated fatty acids in cell membranes, and promoting the degradation of polyunsaturated fatty acids to produce malondialdehyde (MDA), which is the oxidation product of unsaturated membrane lipids [ 6 ]. MDA content can be a key indicator to measure the degree of membrane lipid peroxidation in plants.…”

Section: Introductionmentioning

confidence: 99%

NO and GSH Alleviate the Inhibition of Low-Temperature Stress on Cowpea Seedlings

Song

Zhang

et al. 2023

Plants

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Low-temperature stress in early spring seriously affects the growth and development of cowpea seedlings. To study the alleviative effect of the exogenous substances nitric oxide (NO) and glutathione (GSH) on cowpea (Vigna unguiculata (Linn.) Walp.) seedlings under 8 °C low-temperature stress, 200 μmol·L−1 NO and 5 mmol·L−1 GSH were sprayed on cowpea seedlings whose second true leaf was about to unfold to enhance the tolerance of cowpea seedlings to low temperature. Spraying NO and GSH can eliminate excess superoxide radicals (O2−) and hydrogen peroxide (H2O2) to varying degrees, reduce the content of malondialdehyde and relative conductivity, delay the degradation of photosynthetic pigments, increase the content of osmotic regulating substances such as soluble sugar, soluble protein, and proline, and improve the activity of antioxidant enzymes such as superoxide dismutase, peroxidase, catalase, ascorbate peroxidase, dehydroascorbate reductase, and monodehydroascorbate reductase. This study revealed that the mixed use of NO and GSH played an important role in alleviating low temperature stress, and the effect of spraying NO alone was better than that of spraying GSH.

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“…Physical environmental regulation has generally been conducted through the manipulation of storage temperature and relative humidity [13]. The ideal storage conditions for sweet potato roots are at a temperature of 13-16 • C and a relative humidity of 80-95% [14,15]. However, sweet potato roots are much more sensitive to chilling injury, and cold storage facilities are difficult to promote due to high energy consumption and high financial costs for growers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ethylene and 1-Methylcyclopropene on the Quality of Sweet Potato Roots during Storage: A Review

Kou

Zang

et al. 2023

Horticulturae

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Sweet potato (Ipomoea batatas (L.) Lam.) is served as an important root crop worldwide due to its high yield, strong adaptability and nutrient richness. Sweet potato has played a significant role in ensuring food security and family income opportunities for local populations in China for years of experience. The storage roots, which provide abundant nutrition and health benefits to people, are the mainly harvested and consumed parts of sweet potato. However, after harvest, physiological disorders, such as sprouting, mechanical injury and infectious postharvest diseases, increase the magnitude of sweet potato root quality decline and nutritional compound losses. Ethylene and 1-methylcyclopropene (1-MCP) were considered to be effective commercial treatments in sweet potato postharvest. Exogenous ethylene and 1-MCP treatment could successfully inhibit root sprouts and reduce rot decay without affecting the storage quality of sweet potato. This review aims to summarize the latest available information on the effects of ethylene and 1-MCP with respect to enhancing or impairing sweet potato root quality. A better understanding of the influence of ethylene and 1-MCP on root quality parameters will be useful to further explore the role and mechanisms of action of ethylene in regulating the postharvest storage of sweet potato roots and contributions to technological development and innovation.

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Balance between oxidative stress and the antioxidant system is associated with the level of cold tolerance in sweet potato roots

Cited by 18 publications

References 43 publications

Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars

Storage Property Is Positively Correlated With Antioxidant Capacity in Different Sweet Potato Cultivars

NO and GSH Alleviate the Inhibition of Low-Temperature Stress on Cowpea Seedlings

Effects of Ethylene and 1-Methylcyclopropene on the Quality of Sweet Potato Roots during Storage: A Review

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