<scp>L</scp>‐Phenylalanine ammonia‐lyase activity and concentration of phenolics in developing olive (<i>Olea europaea</i> L cv Arbequina) fruit grown under different irrigation regimes

Tovar, M.J.; Bolaño-Romero, María Paz; Girona, J.; Motilva, Marı́a-José

doi:10.1002/jsfa.1122

Cited by 150 publications

(148 citation statements)

References 22 publications

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“…For other plants (Mangifera indica), the phenolic compound content is influenced by their response to light (Tovar et al, 2002). However, no significant difference in content of total phenolic compounds, PAs, 3-DA, or flavan-4-ols was found between the grain of sorghum varieties resistant or susceptible to photoperiod.…”

Section: Resultsmentioning

confidence: 93%

“…) and abiotic (drought, temperature, photoperiod, nutrient deficiencies, etc.) stresses induce phenylalanine ammonia lyase (PAL; EC 4.3.1.5) synthesis (Chalker-Scott and Fuchigami, 1989;Tovar et al, 2002). PAL activity has been detected in the green shoots and leaves (Stafford, 1969;Mohan et al, 1988) of sorghum, and in sorghum, the infection of the plant with pathogens involves a rapid accumulation of PAL mRNA (Cui et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…Determination of Enzyme ActivitiesR PAL activity was evaluated by measuring trans-cinnamic acid formation from L-phenylalanine as described previously (Tovar et al, 2002). Commercial sodium trans-cinnamate was used as standard.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Phenolic Compounds and Related Enzymes in Sorghum Varieties for Resistance and Susceptibility to Biotic and Abiotic Stresses

et al. 2005

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Abstract-Contents of phenolic compounds and related enzymes before and after sorghum grain germination were compared between varieties either resistant or susceptible to biotic (sooty stripe, sorghum midge, leaf anthracnose, striga, and grain molds) and abiotic (lodging, drought resistance, and photoperiod sensitivity) stresses. Independent of grain germination, sorghum varieties resistant to biotic and abiotic stresses had on average higher contents of proanthocyanidins (PAs), 3-deoxyanthocyanidins (3-DAs), and flavan-4-ols than susceptible varieties. Results show that content of 3-DAs is a good marker for sorghum resistance to both biotic and abiotic stresses because it correlates with resistance to all stresses except for photoperiod sensitivity. The second good marker for stress resistance is content of PAs. Total phenolic compounds and the activities of related enzymes are not good markers for stress resistance in sorghum grains.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Impact of Phenolic Compounds and Related Enzymes in Sorghum Varieties for Resistance and Susceptibility to Biotic and Abiotic Stresses

et al. 2005

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“…Those authors registered a significant increase of weight, volume, and flesh:pit ratio. Recently, other authors (Patumi et al 2002;Tovar et al 2002;Marsilio et al 2006;García et al 2014) reported that drupes from irrigated olive trees are characterized by lower contents in phenolic compounds than those from not irrigated trees, evidencing an effect of the irrigation on the chemical composition of the drupes. However, the effects of different regulated deficit irrigation (RDI) strategies applied to olive orchards have been evaluated, so far, on the drupes for oil extraction rather than table olive production (Goldhamer 1999;Iniesta et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of irrigation treatments on the quality of table olives produced with the Greek-style process

et al. 2016

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The irrigation of olive orchards is commonly applied to produce table olives with optimal size. No data have been published on the microbiological quality of drupes from irrigated olive groves during fermentation. The trials T100 and T50 (receiving a water amount equivalent to 100 % and 50 % of the required amount, respectively) and control T0 (rainfed trial) were monitored during two consecutive years. The results showed a significant increase of equatorial diameter and flesh:pit ratio of irrigated drupes. The decrease of pH and the numbers of lactic acid bacteria (LAB) registered for the irrigated trials during the fermentation were more consistent than those displayed by control T0. Lactobacillus pentosus, Lactobacillus plantarum, Lactobacillus coryniformis, and Pediococcus pentosaceus for LAB and Candida boidinii, Candida diddensiae, and Wickerhamomyces anomalus for yeasts were isolated at the highest concentrations. The global sensory acceptance was better for irrigated trials than control T0. The statistical multivariate analysis showed that the effect of irrigation was independent of the seasonal variability and it clearly distinguished the T100 and T50 trials from rainfed control. Irrigation improves significantly the quality of table olives. Interestingly, all explorative multivariate analyses showed low dissimilarity between irrigated trials; thus, the thesis T50 represents an effective approach to save water in olive orchards without compromising the quality of table olives.

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“…According to Romero et al (2002), this fact can be due to the activation of the phenolic biosynthesis pathway. As observed in Tovar et al (2002), this could have been provoked by the stress suffered under RDI, which leads to an increase in l-phenylalanine ammonia lyase activity, which is the main enzyme in this metabolic pathway.…”

Section: Analysis Of Bioactive Compoundsmentioning

confidence: 92%

Combined effects of deficit irrigation and fresh-cut processing on quality and bioactive compounds of nectarines

Falagán¹,

Artés²,

Gómez³

et al. 2015

Hort. Sci. (Prague)

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Falagán N., Artés F., Gómez P.A., Artés-Hernández F., Pérez-Pastor A., de la Rosa J.M., Aguayo E. Water scarcity makes necessary the use of tools for increasing water productivity such as regulated deficit irrigation strategies (RDI). The effect of RDI on fresh-cut white flesh extra-early nectarine was studied. Initially, the soluble solids content of nectarines from RDI was higher than in control and over-irrigated fruits (9.72 ± 0.20 vs. 8.57 ± 0.05°Brix, respectively) but after shelf-life storage no differences were found. During storage, RDI fruits had a more stable antioxidant capacity and soluble phenolic content. This treatment showed 10% more vitamin C than the other irrigation treatments, due to an increase in dehydroascorbic acid content. No pathogenic bacteria growth was found and all microbial counts were below the European legal limits. For all the irrigation treatments, the final sensorial scores were above the limit of marketability. Overall, RDI enabled savings of about 1,260 m 3 of water/ha and year, without negatively affecting the quality of the fruit, allowing for their use as a fresh-cut product with a shelf-life of 8 days at 5°C.

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L‐Phenylalanine ammonia‐lyase activity and concentration of phenolics in developing olive (Olea europaea L cv Arbequina) fruit grown under different irrigation regimes

Cited by 150 publications

References 22 publications

Impact of Phenolic Compounds and Related Enzymes in Sorghum Varieties for Resistance and Susceptibility to Biotic and Abiotic Stresses

Impact of Phenolic Compounds and Related Enzymes in Sorghum Varieties for Resistance and Susceptibility to Biotic and Abiotic Stresses

Effects of irrigation treatments on the quality of table olives produced with the Greek-style process

Combined effects of deficit irrigation and fresh-cut processing on quality and bioactive compounds of nectarines

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