Understanding the physiological effects of UV-C light and exploiting its agronomic potential before and after harvest

Urban, Laurent; Charles, Florence; Miranda, Maria Raquel Alcântara de; Aarrouf, Jawad

doi:10.1016/j.plaphy.2016.04.004

Cited by 172 publications

(105 citation statements)

References 143 publications

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“…Alterations in the pigment content could also be associated with chloroplast damage. Besides direct destruction of plasmatic membranes by high energy UV radiation, plastid membranes might be damaged as a result of reactive oxygen species (ROS) activity (Urban et al 2016). The source of ROS can include PSII malfunction as well as impairment of antioxidant enzymes (Urban et al 2016).…”

Section: Resultsmentioning

confidence: 99%

“…Although the UV-B:UV-A ratio undergoes quite significant changes both during the day and the year (due to unstable UV-B and constant UV-A transmission to the Earth's surface), there is a lot of information about the influence of these UV components on plants (Moan 2001;Verdaguer et al 2017). Direct influence of ionizing radiation on plant cells is associated with: membrane lipid peroxidation (Urban et al 2016), protein polymerization and enzyme deactivation (Urban et al 2016); destruction of double bonds C=C leading to changes in the structure of DNA and proteins (Urban et al 2016 and literature therein), disorder of ion transport, depolarization of membranes and increase in their permeability (Wuytack et al 2003). Moreover, UV radiation influences the photosynthesis process which is associated with (1) disturbances in the synthesis of chlorophyll pigments (degradation of alpha amino levulinic dehydrogenase ALAD) (Urban et al 2016); (2) disorders in the synthesis of carotenoid pigments (MEP pathway) (Giuliano 2014) as well as (3) degradation of pigments related to radiationinduced senescence and/or radiation-induced programmed cell death (Kataria et al 2014;Urban et al 2016;Verdaguer et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

et al. 2019

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Plants growing under natural conditions are constantly exposed to ultraviolet (UV), primarily UV-A, radiation. Grass pea (Lathyrus sativus L.) is a legume species resistant to harsh growing conditions, such as drought, salinity or periodic flooding. Due to the advantageous composition of seeds, it is used for consumption in such regions as South Asia or East Africa where high intensity of UV radiation occurs. Absorption of this spectral range causes changes in the photosynthetic apparatus of plants, including damage to the photosystem II (PSII) reaction centres. The aim of the work was to examine whether the use of the combination UV-A: red light as a source of radiation would enable quick acclimatization of the photosynthetic apparatus of grass pea to the negative effect of UV-A radiation. 14-day-old plants were exposed to UV-A:red radiation for 48 h. The plants exposed to UV-A:red radiation showed enhanced effective efficiency of PSII and increased total electron carriers, which enabled more effective photosynthesis at higher values of radiation intensity in comparison with control plants, kept under white LED light. At the same time, there were no statistically significant differences in both the photosynthetic pigment contents and the level of lipid peroxidation. The obtained results indicate that the observed increase in the efficiency of CO 2 carboxylation after short-term UV-A:red radiation has resulted from the efficient linear electron transport due to maintaining the effective oxygen evolving complex (OEC) and increased total electron carriers.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

et al. 2019

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“…UV-C is an environmental-friendly strategy for extending the shelf life of fresh-cut produce and has proved to be effective in reducing bacterial count but not damage other quality attributes [34][35][36]. Our results showed that UV-C treatment was effective in sterilization of fresh-cut potatoes during storage, and, more interestingly, the SAS treatment had a better effect than UV-C treatment during the early storage period.…”

Section: Discussionmentioning

confidence: 57%

Comparison of Sodium Acid Sulfate and UV-C Treatment on Browning and Storage Quality of Fresh-Cut Potatoes

Xie

Lin

Guan

et al. 2017

Journal of Food Quality

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Fresh-cut vegetables, such as potato chips, get brown quickly and can easily be infected by bacterium during storage. Sodium acid sulfate (SAS) and UV-C treatments are regarded as effective methods for food preservation. In this study, the effects of SAS, UV-C treatment, and their combination on fresh-cut potatoes during storage were evaluated. Compared with the control, all of the treatments were effective in inhibiting the bacterial growth during the whole storage period. Also, both SAS and SAS + UV-C treatments significantly decreased browning and polyphenol oxidase (PPO) activity and increased the firmness and malondialdehyde (MDA) contents, while the UV-C treatment has no good effects on protecting such storage qualities in freshcut potatoes. However, when compared with SAS treatment, the combination of SAS and UV-C treatment did not promote the effect in protecting the storage abilities. Thus, it was concluded that SAS is a better treatment in extending shelf life and controlling the quality of fresh-cut potatoes during storage compared to UV-C treatment.

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“…In general, the activities of POX, PAL and PPO have been enhanced by physical postharvest treatments, including UV‐C and hot water. This indirect effect is related to the induction of defence in host and reinforces the resistance response of the fruit submitted to those postharvest treatments (Urban, Charles, Miranda, & Aarrouf, ).…”

Section: Discussionmentioning

confidence: 59%

Physical postharvest treatments in the control of stem‐end rot of mango

Terao

Nechet

Frighetto

et al. 2018

Journal of Phytopathology

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Botryosphaeria dothidea is the major pathogen of mango in Brazil, causing stem‐end rot, which causes significant losses during transportation and storage. The current strategy to control this particular disease using synthetic fungicides has been ineffective, leaving residues in the fruit. The objective of the research was to study the effect of physical treatments, with hot water rinse brushing (HWRB) and ultraviolet C irradiation (UV‐C), individually and in combination, to control stem‐end rot of mango. Physicochemical parameters, respiration and resistance induction of the fruit were also analysed. The in vitro trials demonstrated that B. dothidea is a thermoresistant fungus. The individual treatments with HWRB at 65°C for 15 s and 2.5 kJ/m2 of UV‐C presented the best results, showing less symptoms of the disease during 18 days of storage. The combination of HWRB with UV‐C did not improve the control of the disease when compared to the treatments applied individually. The physicochemical parameters and the consumer acceptance evaluation showed that both physical treatments preserved the appearance of the fruit and delayed the ripening–senescence process. The induction of defence‐related enzymes revealed that induced resistance was an important mechanism involved in the control of stem‐end rot of mango.

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Understanding the physiological effects of UV-C light and exploiting its agronomic potential before and after harvest

Cited by 172 publications

References 143 publications

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

Response of grass pea (Lathyrus sativus L.) photosynthetic apparatus to short-term intensive UV-A:red radiation

Comparison of Sodium Acid Sulfate and UV-C Treatment on Browning and Storage Quality of Fresh-Cut Potatoes

Physical postharvest treatments in the control of stem‐end rot of mango

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