Suitable illumination intensity is essential for preserving the quality of cucumber (Cucumis sativus L.) seedlings during storage

Continuous darkness decreases seedling quality during storage, whereas appropriate light quality and intensity can overcome these negative effects. In this study, we determined the light intensity, storage time (ST), and storage temperature suitable for cucumber (Cucumis sativa L.) seedlings. We stored cucumber seedlings under four different photosynthetic photon flux densities (PPFDs; 0, 15, 30, and 45 μmol·m-2·s-1) at 12°C, and examined how the morphological, physiological, and photosynthetic changes in seedlings during storage affected their ability to recover after transplanting. Our results indicated that at least 15 μmol·m-2·s-1 PPFD was needed for cucumber seedlings stored in the dark for 2 or 4 d, and at least 30 μmol·m-2·s-1 PPFD was needed when the ST was extended to 6 d. Overall, our results showed that cucumber seedlings require light-emitting diode (LED) illumination during storage to maintain their quality and recovery ability.

Metabarcoding in Diet Assessment of Heterotrigona itama Based on trnL Marker towards Domestication Program

Honey quality is the main criterion used for evaluating honey production in the stingless bee Heterotrigona itama, and it is correlated with the plant species consumed as its main diet. The objective of this study was to obtain the metabarcode data from 12 populations of H. itama species throughout Malaysia (Borneo and Peninsular Malaysia) using the trnL marker. A total of 262 species under 70 families and five phyla of plants were foraged by H. itama in the studied populations. Spermatophyta and Magnoliophyta were recorded as the two most abundant phyla foraged, at 55.95% and 32.39%, respectively. Four species, Garcinia oblongifolia, Muntingia calabura, Mallotus pellatus, and Pinus squamata, occurred abundantly and were consumed by H. itama in all the populations. These data are considered as a fundamental finding that is specific to the diet of H. itama for strategizing the management of the domestication process specifically in a mono-cropping system and in a netted structure. Thus, based on these findings, we recommend Momordica charantia, Melastoma sp., and Cucumis sativa as the best choices of food plant species to be planted and utilized by H. itama in meliponiculture.

Dosis y frecuencia de biofertilizantes en Cucumis sativus L. Municipio de Siuna RACCN Nicaragua

La aplicación de abonos orgánicos en la producción agrícola, ha constituido especial importancia desde la percepción de calidad, inocuidad y medio ambiente, en el municipio de Siuna, ya que se han realizado estudios sobre el efecto de los abonos orgánicos; sin embargo, no se han hecho estudios en la zona que evalúen las cantidades y frecuencias de los fertilizantes orgánicos especialmente los foliares.Esta investigación evalúa los efectos de las dosis y frecuencias de aplicación de biofertilizante en el cultivo de Cucumis sativa L, desde su crecimiento, desarrollo y productividad, con la finalidad de evaluar con más detalle el comportamiento de cultivo, y poder recomendar de manera confiable cómo se pueden obtener máximos rendimientos a menores costos y sin afectar el medio ambiente. Es una investigación experimental en el nivel explicativa, se utilizó un diseño completamente aleatorio con tres replicas y un modelo estadístico donde se analizaron cada uno de los tratamientos.Los principales resultados son: El crecimiento y desarrollo en el cultivo del pepino son similares en los diferentes niveles de concentración y aplicación del fertilizante, hay una mejor respuesta a una menor frecuencia y mayor dosis de aplicación del biofertilizante en el número de flores producidas por plantas y la producción de pepino es mayor con menor frecuencias y mayores concentraciones de fertilizante, y que por lo tanto también son más rentables.

Investigation of plant sources of hydroperoxide lyase for 2(E)-hexenal production

2(E)-hexenal is a green note flavour molecule that is widely used in various compositions of aromas, flavours and perfumery. As there is considerable demand for naturally produced aromas this article deals with some aspects of this C6-volatile production with regard to the selection of plant source material and reaction conditions. The following plants were tested for this purpose: runner bean (Phaseolus coccineus), common bean (Phaseolus vulgaris), three (Capsicum annuum) bell pepper varieties, garden cress (Lepidium sativum), green slicing cucumber (Cucumis sativa), mung beans (Vigna mungo) and brown lentils (Lens culinaris). Selection of source material was considered on the basis of 2(E)-hexenal yield and productivity. The common bean leafs were able to produce up to 35 mg of 2(E)-hexenal/kg fresh leaves.

ANTIMALARIAL POTENTIAL STUDY OF CUCUMBER SKIN AND BASE POINT CHLOROFORM EXTRACT AS A SOLUTION TO ORGANIC WASTE OF SIDEWALK FOOD STALL TREATMENT IN YOGYAKARTA

<p>Malaria is a major infectious disease in the world. The disease is caused by blood protozoan from the genus Plasmodium. The main problem in controling this disease is resistance parasite cases to drugs that have been used. Cucumber (Cucumis sativa L.) contain bioactive compounds suspected of terpenoids and saponins are believed to reduce the level of parasitemia. Waste of skin and cucumber base is very abundant, especially from stalls in the city of Yogyakarta. Estimated at the base and cucumber skin there are bioactive content that can be used as an alternative antimalarial drug. This research aims to study the potential of chloroform extract and the base of the fruit peel waste to the level of parasitemia of Plasmodium berghei in mice. <br />First step is collecting the waste of skin and cucumber base in some stalls in the city of Yogyakarta. Extraction by maceration method using chloroform solvent, the method further phytochemical studies by Thin Layer Chromatography (TLC). Antiplasmodium test with negative control treatment (DMSO 0.3%), positive control (chloroquine 3 mg / kg), the dose C.sativa extract 100; 200; 300; 400 and 500 mg / kg in male mice given strain Switzerland 3 months of age infected with Plasmodium berghei orally. T he results showed there were terpenoids and saponins compounds in the chloroform extracts of C.sativa base and skin. The most effective dose of the extract inhibition of parasitemia level P. berghei in mice treated P5 is the highest (500 mg / kg BB), which is still higher than the standard drug Chloroquine so that waste of skin and the base C.sativa potential as an alternative antimalarial drug.</p><p><br /><strong>Keywords</strong>: Waste of skin and the base of cucumber (Cucumis sativa L.) Antimalarial.</p>