Melatonin reduces pink rib discoloration in wounded lettuce midribs

Belisle, Catherine E.; Sargent, Steven A.; Sandoya, Germán V.; Brecht, Jeffrey K.; Dai, Ru; Askey, Bryce C.; Lei, Zhentian; Lin, Makou; Kim, Jeongim

doi:10.1016/j.postharvbio.2023.112307

Cited by 2 publications

(2 citation statements)

References 55 publications

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“…To evaluate lettuce cultivars with variable shelf-life, 42 lettuce cultivars were previously surveyed based on visual ratings characteristics 11 . For this purpose, whole heads ( n = 3) were visually evaluated for overall appearance using a hedonic rating scale adapted from Kader et al 12 .…”

Section: Resultsmentioning

confidence: 99%

Examining preharvest genetic and morphological factors contributing to lettuce (Lactuca sativa L.) shelf-life

Chase,

Belisle,

Ahlawat

et al. 2024

Sci Rep

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Lettuce is a highly perishable horticultural crop with a relatively short shelf-life that limits its commercial value and contributes to food waste. Postharvest senescence varies with influences of both environmental and genetic factors. From a larger pool of romaine lettuce genotypes, we identified three genotypes with variable shelf lives and evaluated their leaf morphology characteristics and transcriptomic profiles at preharvest to predict postharvest quality. Breeding line 60184 had the shortest shelf-life (SSL), cultivar ‘Manatee’ had an intermediate shelf-life (ISL), and ‘Okeechobee’ had the longest shelf-life (LSL). We observed significantly larger leaf lamina thickness and higher stomatal index in the SSL genotypes relative to the LSL cultivar. To identify molecular indicators of shelf-life, we used a transcriptional approach between two of the contrasting genotypes, breeding line 60184 and cultivar ‘Okeechobee’ at preharvest. We identified 552 upregulated and 315 downregulated differentially expressed genes between the genotypes, from which 27% of them had an Arabidopsis thaliana ortholog previously characterized as senescence associated genes (SAGs). Notably, we identified several SAGs including several related to jasmonate ZIM-domain jasmonic acid signaling, chlorophyll a–b binding, and cell wall modification including pectate lyases and expansins. This study presented an innovative approach for identifying preharvest molecular factors linked to postharvest traits for prolonged shelf.

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Section: Resultsmentioning

confidence: 99%

Examining preharvest genetic and morphological factors contributing to lettuce (Lactuca sativa L.) shelf-life

Chase,

Belisle,

Ahlawat

et al. 2024

Sci Rep

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show abstract

“…It also modulated the expression of senescence-related genes, delaying senescence and extending the shelf life in postharvest vegetables ( Jayarajan and Sharma, 2021 ). Various studies have demonstrated the beneficial effects of melatonin on senescence in vegetables, including broccoli, lettuce, and Chinese flowering cabbage ( Tan et al., 2021 ; Wu et al., 2021 ; Belisle et al., 2023 ). In the present study, we observed a similar postponement of the senescence process in postharvest okras treated with melatonin.…”

Section: Discussionmentioning

confidence: 99%

Melatonin delayed senescence by modulating the contents of plant signalling molecules in postharvest okras

Shi,

Chen,

Dong

et al. 2024

Front. Plant Sci.

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Okra has been widely cultivated worldwide. Consumers appreciate its nutritional value and delicious taste. However, okra is very perishable after harvest because of rapid senescence and high susceptibility to mechanical injuries, which limits its storage life and reduces consumer acceptance. This study examined the influence of melatonin treatment on senescence process and endogenous plant signalling molecules in postharvest okras. The results indicated that melatonin treatment delayed senescence by increasing the endogenous melatonin content through upregulation of its biosynthetic genes. In addition, the treatment increased the contents of indole-3-acetic acid (IAA) and gibberellin (GA) due to the positive modulation of their metabolic and signalling genes. Furthermore, treated okras exhibited higher levels of γ-aminobutyric acid (GABA) but lower abscisic acid (ABA) content, contributing to the delayed senescence process compared to control. Overall, the findings suggested that melatonin postponed senescence in okras fruit by positively regulating endogenous signalling molecules such as melatonin, IAA, GABA, GA, and ABA.

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Melatonin reduces pink rib discoloration in wounded lettuce midribs

Cited by 2 publications

References 55 publications

Examining preharvest genetic and morphological factors contributing to lettuce (Lactuca sativa L.) shelf-life

Examining preharvest genetic and morphological factors contributing to lettuce (Lactuca sativa L.) shelf-life

Melatonin delayed senescence by modulating the contents of plant signalling molecules in postharvest okras

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