Characterization of Ingredients Incorporated in the Traditional Mixed-Salad of the Capuchin Monks

Recipes on the composition of the \u201csalad of the monks\u201d (Capuchin monks) have been reported in Italy since the 17th century. Different wild edible plants were highly regarded as an important ingredient of this mixed salad. Among these, some species played a key role for both their taste and nutritional properties: Plantago coronopus L. (PC), Rumex acetosa L., Cichorium intybus L., and Artemisia dracunculus L. In the present study, the micromorphological and phytochemical features as well as the antioxidant and anti-inflammatory properties of extracts of these fresh and blanched leaves, were investigated. The extracts obtained by blanched leaves, according to the traditionally used cooking method, showed the highest content of bioactive compounds (total phenols 1202.31\u201310,751.88 mg GAE/100 g DW; flavonoids 2921.38\u201361,141.83 mg QE/100 g DW; flavanols 17.47\u2013685.52 mg CE/100 g DW; proanthocyanidins 2.83\u201316.33 mg CyE/100 g DW; total chlorophyll 0.84\u20131.09 mg/g FW; carbohydrates 0.14\u20131.92 g/100 g FW) and possess the most marked antioxidant (IC50 0.30\u2013425.20 \ub5g/mL) and anti-inflammatory activity (IC50 240.20\u2013970.02 \ub5g/mL). Considering this, our results indicate that increased consumption of the investigated plants, in particular of PC, raw or cooked briefly, could provide a healthy food source in the modern diet by the recovery and enhancement of ancient ingredients

Polyphenol characterization and skin-preserving properties of hydroalcoholic flower extract from Himantoglossum robertianum (Orchidaceae)

Himantoglossum robertianum (Loisel.) P. Delforge is a Mediterranean orchid whose propagation in vitro has been achieved, making it eligible as a source of bioactive substances. Flowers were analyzed by light and SEM microscopy and used to obtain a polyphenol-rich, hydroalcoholic flower extract (HFE). HFE was characterized for total phenols, flavonoids and proanthocyanidins, and for polyphenol profile by RP-LC-DAD. Antioxidant assays, in vitro collagenase and elastase inhibition, and MTT and cell motility assays on HaCaT keratinocytes were done. Microscopy showed epidermal cells containing anthocyanins in the flower labellum. Flavonoids (flavones and flavan-3-ols) represented the most abundant compounds (42.91%), followed by scopoletin (33.79%), and phenolic acids (23.3%). Antioxidant assays showed strong activities, rating ORAC > FRAP > TEAC > \u3b2-carotene bleaching > DPPH > iron-chelation. Biological assays showed elastase and collagenase inhibition (up to 42% and 78%, respectively), improvement of HaCaT cell viability after treatment with 500 \u3bcM H2O2 (from 30% to 84% of control), and stimulation of cell migration rate up to 210% of control. In summary, HFE counteracted different free radicals, while protective properties were shown by cell-free and cell-based bioassays, suggesting the possible use of H. robertianum flowers for skin-preserving, repair, and anti-aging applications

Vibrational disruption of feeding behaviors of a vector of plant pathogen

Interference with the behaviors associated to host plant recognition, and inter-and intra-specific communication of insect vectors of plant pathogens, could represent a sustainable strategy for reducing or disrupting pathogen transmission Here, we show that the transmission over a suitable host plant (sunflower) of a vibrational stimulus significantly affects the probing and feeding behavior of the spittlebug Philaenus spumarius (Hemiptera: Aphrophoridae), the main European vector of the fastidious bacterium Xylella fastidiosa. Specifically, ca. 30% of the individuals did not even attempt to probe the sunflower plants to which the stimulus was transmitted, while the remaining showed a sex-independent reduction in inges-tion of the xylem sap, i.e., P. spumarius\u2019 main food source, of ca. 67% compared to the control. Even so, the stimulus did not affect the feeding behavior when transmitted to olive plants. The possible reflection of a signal-based vector behavior disturbance on the epidemiology of X. fastidiosa, together with future research needs are discussed

Design of ideal vibrational signals for stinkbug male attraction through vibrotaxis experiments

Many groups of insects utilize substrate-borne vibrations for intraspecific communication. This characteristic makes them a suitable model for exploring the vibrations as a tool for pest control in alternative to chemicals. The detailed knowledge of the species communication is a prerequisite to select the best signals to use. In this sense, this study aimed at exploring the use of substrate-borne vibrations for pest control of the brown marmorated stink bug (BMSB), Halyomorpha halys Stål (Heteroptera: Pentatomidae). To this purpose, in a first set of experiments, we identified the spectral and temporal characteristics that best elicit male responsiveness. Bioassays were conducted with artificial signals that mimicked the natural female calling signal. In a second part, we used the acquired knowledge to synthesize new signals endowed with different degrees of attractiveness in single and two choice bioassays using a wooden custom-made T stand

Distribution and identification of potential vectors of Xylella fastidiosa in almonds, vineyards and citrus in mainland Spain

The introduction of the vector-borne bacterium Xylella fastidiosa on theEuropean continent is causing important economic and social disturbances, especially inthe olive groves of Southern Italy. The recent detection of the pathogen in several keycrops in mainland Spain such as almond, apricot and plum in Alicante and in olive in Madridhas increased the need to assess the degree of threat to which Spanish agriculture isexposed. Therefore, a deep knowledge about the distribution and population trends ofpotential vectors (Hemiptera: Cicadomorpha) is required to assess the risk of pathogenspread. In addition to the recently published results in olive groves, almond groves (Madridand Alicante), vineyards (La Rioja and Madrid) and citrus groves (Murcia) were sampledfrom 2017 to 2019 in order to identify the population trends of the potential vectors of X.fastidiosa. Nymphs of spittlebugs were sampled every 10 days starting from early Marchuntil spittles were no longer observed. The number of spittles per plant, number of nymphsper spittle, and spittle position on the ground vegetation was counted. Adults ofCicadomorpha were sampled both in the ground vegetation and the tree canopy by usingthe sweep net method from early April to November. The spittlebugs Philaenus spumariusand Neophilaenus campestris (Hemiptera: Aphrophoridae) were the main vector speciesassociated with the three crops. Furthermore, we found the potential vector Cicadellaviridis (Hemiptera: Cicadellidae) on the ground vegetation associated with the vineyardslocated in La Rioja (Northern Spain). Preliminary results indicated that the highest vectordensity was observed in almond groves of Alicante. We found a high density of nymphs of P. spumarius and N. campestris from early March to late April reaching densities higherthan 100 nymphs/m2in ground vegetation below the almond trees. However, the rest ofthe areas sampled presented a much lower density of vectors ranging from peaks of 1.3nymphs/m2in almonds to 4.8 nymphs/m2in vineyards