Suitability of fluorescence indices for the estimation of fruit maturity compounds in tomato fruits

Groher, Tanja; Schmittgen, Simone; Fiebig, Antje; Noga, Georg; Hunsche, Maurício

doi:10.1002/jsfa.9111

Cited by 20 publications

(11 citation statements)

References 35 publications

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“…Moreover, considerate handling of leaves allows for several measurements of the same leaf, enabling to gain insights in temporal developments. Several studies demonstrated the viability of optical devices to access secondary metabolites in plant leaves: a multiparametric fluorescence sensor was used to evaluate the influence of nutrient deficiency on the chemical properties of tomato leaves and to quantify the content of the flavonoids rutin and solanesol [19,20]. In bell pepper, a fluorescence sensor was used to evaluate the impact of priming plants with high light conditions on leaf flavonoid content [10].…”

Section: Non-invasive Monitoring Of Secondary Metabolites In Plant Lementioning

confidence: 99%

Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

et al. 2020

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The green biomass of horticultural plants contains valuable secondary metabolites (SM), which can potentially be extracted and sold. When exposed to stress, plants accumulate higher amounts of these SMs, making the extraction and commercialization even more attractive. We evaluated the potential for accumulating the flavones cynaroside and graveobioside A in leaves of two bell pepper cultivars (Mavras and Stayer) when exposed to salt stress (100 mM NaCl), UVA/B excitation (UVA 4–5 W/m2; UVB 10–14 W/m2 for 3 h per day), or a combination of both stressors. Plant age during the trials was 32–48 days. HPLC analyses proved the enhanced accumulation of both metabolites under stress conditions. Cynaroside accumulation is effectively triggered by high-UV stress, whereas graveobioside A contents increase under salt stress. Highest contents of secondary metabolites were observed in plants exposed to combined stress. Effects of stress on overall plant performance differed significantly between treatments, with least negative impact on above ground biomass found for high-UV stressed plants. The usage of two non-destructive instruments (Dualex and Multiplex) allowed us to gain insights into the ontogenetical effects at the leaf level and temporal development of SM contents. Indices provided by those devices correlate fairly with amounts detected via HPLC (Cynaroside: r2 = 0.46–0.66; Graveobioside A: r2 = 0.51–0.71). The concentrations of both metabolites tend to decrease at leaf level during the ontogenetical development even under stress conditions. High-UV stress should be considered as a tool for enriching plant leaves with valuable SM. Effects on the performance of plants throughout a complete production cycle should be evaluated in future trials. All data is available online.

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Section: Non-invasive Monitoring Of Secondary Metabolites In Plant Lementioning

confidence: 99%

Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

et al. 2020

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“…Moreover, considerate handling of leaves allows for several measurements of the same leaf, enabling to gain insights in temporal developments. Several studies demonstrated the viability of optical devices to access secondary metabolites in plant leaves: A multiparametric fluorescence sensor was used to evaluate the influence of nutrient deficiency on the chemical properties of tomato leaves and to quantify the content of the flavonoids rutin and solanesol [17,18]. In bell pepper, a fluorescence sensor was used to evaluate the impact of priming plants with high-light conditions on leave flavonoid content [10].…”

Section: Non-invasive Monitoring Of Secondary Metabolites In Plant Lementioning

confidence: 99%

Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

Ellenberger¹,

Siefen²,

Krefting³

et al. 2019

Preprint

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The green biomass of horticultural plants contains valuable secondary metabolites (SM) which can potentially be extracted and sold. When exposed to stress, plants accumulate higher amounts of these SMs, making the extraction and commercialization even more attractive. We evaluated the potential for accumulating of the flavones cynaroside and graveobioside A in leaves of two bell pepper cultivars (Mavras and Stayer) when exposed to salt stress (100 mM NaCl), UVA/B excitation (UVA 4-5 W/m²; UVB 10-14 W/m² for 3 hours per day) or a combination of both stressors. HPLC analyses proved the enhanced accumulation of both metabolites under stress conditions. Cynaroside accumulation is effectively triggered by high-UV stress, whereas graveobioside A contents increase under salt stress. Highest contents were observed in plants exposed to combined stress. Effects of stress on overall plant performance differed significantly between treatments, with least negative impact on aboveground biomass found for high-UV stressed plants. The usage of two non-destructive instruments (Dualex and Multiplex) allowed us to gain insights in ontogenetical effects at the leaf level and temporal development of SM contents over time. Indices provided by those Preprints (www.preprints.org) | NOT PEER-REVIEWED | devices correlate fairly with amounts detected via HPLC (Cynaroside: R 2 = 0.46 -0.66; Graveobioside A: R 2 = 0.51 -0.71). The concentrations of both metabolites tend to decrease at leaf level during the ontogenetical development even under stress conditions. High-UV stress is a promising tool for enriching plant leaves with valuable SM without major effects on plant biomass. All data is available online [1]. Abbreviations DATIdays after treatment inception HPLChigh performance liquid chromatography ROSreactive oxygen species SMsecondary metabolite Introduction Green biomass as a source of valuable chemicalsCommercial vegetable production is accompanied by large quantities of so far under-utilized green biomass in all stages of production and especially after harvest [2]. While the use of biomass for the purpose of energy production is becoming a standard procedure in northern Europe in recent years [3], the extraction and the use of high-value SMs from vegetable plant leaves are just being developed. Research strategies and legacy in Europe are heading towards cascade use of agricultural byproducts and pave the way for extracting and using "valuable substances or molecules before ultimately discarding the left-overs" [4]. The pharmaceutical industryas an exampleis highly dependent on plant SMs, since approximately 60% of anticancer compounds and 75 % of drugs for infectious diseases are derived from plants [5]. In this frame, research on targeted enrichment of valuable substances in plant biomass is gaining in importance [6].Preprints (www.preprints.org) | NOT PEER-REVIEWED |

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“…Other portable near‐infrared (NIR) (600–1100 nm) devices have been employed on on‐tree tomatoes in a glasshouse with problems in avoiding interference by scattered sunlight . Fluorescence portable sensors have been also tested for lycopene prediction . However, since they are based on the measurement of chlorophyll fluorescence their application on full‐ripe tomatoes is useless due to the disappearance of chlorophyll at the last stage of maturity.…”

Section: Introductionmentioning

confidence: 99%

“…32 Fluorescence portable sensors have been also tested for lycopene prediction. 33 However, since they are based on the measurement of chlorophyll fluorescence their application on full-ripe tomatoes is useless due to the disappearance of chlorophyll at the last stage of maturity.…”

Section: Introductionmentioning

confidence: 99%

Comparison of lycopene changes between open‐field processing and fresh market tomatoes during ripening and post‐harvest storage by using a non‐destructive reflectance sensor

et al. 2018

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BACKGROUND Accumulation and stability of tomato lycopene markedly depends on the cultivar, plant growing and storage conditions. To estimate lycopene in open‐field cultivated processing and fresh market tomatoes, we used a calibrated spectral reflectance portable sensor. RESULTS Lycopene accumulation in fruits attached to the plant, starting from the Green ripening stage, followed a sigmoidal function. It was faster and reached higher levels in processing (cv. Calista) than fresh market (cv. Volna) tomatoes (90 and 62 mg kg−1 fresh weight, respectively). During storage at 12, 20 and 25 °C, Red tomatoes retained about 90% of harvest lycopene for three weeks. Pink tomatoes increased lycopene during the first week of storage, but never reached the lycopene values of Red tomatoes ripened on the vine. Storability at 12 °C retaining the highest quality in red tomatoes was limited to 14 and 7 days for Calista and Volna cultivars, respectively. CONCLUSION Significant differences in lycopene accumulation and stability between processing and fresh market tomatoes were established by examining with time the very same fruits by a non‐destructive optical tool. It can be useful in agronomical and post‐harvest physiological studies and can be of interest for producers oriented to the niche nutraceutical market. © 2018 Society of Chemical Industry

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Suitability of fluorescence indices for the estimation of fruit maturity compounds in tomato fruits

Cited by 20 publications

References 35 publications

Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

Effect of UV Radiation and Salt Stress on the Accumulation of Economically Relevant Secondary Metabolites in Bell Pepper Plants

Comparison of lycopene changes between open‐field processing and fresh market tomatoes during ripening and post‐harvest storage by using a non‐destructive reflectance sensor

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