Search results for " pear"

Development of an efficient regeneration protocol for pear rootstock Pyrodwarf and assessment of somaclonal variability using SSR analysis.

2009

Identification of Chinese fresh-water pearls using MN2+ activated cathodoluminescence

2000

Fresh-water tissue graft-cultured pearls from China were investigated using hot cathode and cold cathode cathodoluminescence microscopes. Supplementary investigations were done using X-radiography, a Scanning Electron Microscope, an optical microscope, and an Atomic Force Microscope (AFM). The results were compared with those of natural fresh-water pearls from the Mississippi river. Thin sections of fresh-water natural pearls from the Mississippi river could be distinguished from those of fresh-water tissue graft cultured pearls from China using a hot cathode cathodoluminescence microscope according to the distribution of Mn2+ as follows: (1) Fresh-water tissue graft cultured pearls from Ch…

Use of xanthan gum and calcium ascorbate to prolong cv. Butirra pear slices shelf life during storage

2023

After cut, pear fruit (Pyrus communis L.) during shelf-life can be subjected to colour and flavour changes. To maintain flesh colour and firmness, different technologies could be employed during shelf-life, such as chemical, physical and edible coating treatments. In the present study, the effects of two edible coating formulations containing xanthan gum and calcium ascorbate on fresh-cut pear fruit were investigated. After harvest, 200 fruits were cut and coated with Xanthan Gum (XAN) and distilled water or Xanthan gum + Calcium Ascorbate (ASC), respectively, while control (CTR) pear fruit slices were soaked in distilled water and lastly packed in polyethylene terephthalate (PET) packages …

Il ficodindia, stato attuale e prospettive della coltura e dell’uso dei suoi frutti

2015

Il ficodindia continua ad essere una realtà importante in alcune zone semi-aride della Sicilia, arrivando sui mercati anche con la denominazione di origine protetta e, in diversi casi, con la produzione biologica. Negli ultimi venticinque anni il modello italiano è stato largamente utilizzato come punto di riferimento tecnico in tutti i nuovi impianti diffusi ormai in Nord Africa o in California, Cile, Argentina, Sud Africa e nel Vicino Oriente. Tentativi di diffusione esistono anche in India, mentre nel Corno d’Africa c’è ormai una produzioni stabile e importante su diverse migliaia di ettari. Questa specie continua ad avere un ruolo fondamentale, se non insostituibile, nelle regioni semi-…

CO2 FLUXES OF OPUNTIA FICUS-INDICA MILL. TREES IN RELATION TO WATER STATUS

2013

Gas exchange pattern in O. ficus-indica(OFI), refers to the Crassulacean Acid Metabolism (CAM); trees have nocturnal stomata opening, so net CO2 uptake and water loss occur during the cooler part ofthe 24-hour cycle. Succulent cladodes skip severe periods of drought through their water storer tissue (parenchyma). To study carbon fluxes in stress and no stress conditions, an experiment was carried out on 3-year-old irrigated and non-irrigated OFI potted trees; whole tree gas exchange was measured continuously with a balloon system made up by a portable Infrared Gas Analyzer. Continuous measurements(nighttime) during the summer season were useful to assess differences in carbon uptake under s…

Use of xanthan gum as edible coating to prolong shelf life of cactus pear fruit

2022

The objective of this work was to elucidate the effect of xanthan gum-based edible coating C35H49O29 on the quality of cactus pear fruit (Opuntia ficus-indica). The research was conducted in 2018, on O. ficus-indica ‘Bianca’ fruit, coming from second bloom “scozzolatura”. After harvest, 100 fruits were coated with a xantan gum (XAN) and distilled water and on other 100 fruits were immersed in distilled water (CTR). All fruits were stored at 6±0.5°C with RH 90% for 30 days. Every 7 days, visual quality browning index score, flesh colour, total soluble solids (TSS), total acidity (TA), ascorbic acid and total phenols were measured. During cold storage, fruit treated with XAN (p<0.05) showe…

Survival, morphological variability, and performance of Opuntia ficus-indica in a semi-arid region of India

2022

Cactus pear (Opuntia ficus-indica (L.) Mill.) can survive extreme environmental condition and is known for its fodder potential in many parts of the world. The morphological diversity of 15 introduced accessions was evaluated at Jhansi, Uttar Pradesh, India. The plants were established in 2013. Survival and nutrient status were evaluated after two years. Above-ground plant height, biomass, primary and secondary cladode numbers, primary and secondary cladode lengths and below-ground root length, weight, and surface area measurements were done six years after cladode planting. Yellow San Cono, White Roccapalumba, and Seedless Roccapalumba survived 100%. The discriminant traits according to pr…

Seasonal characterization of nutritional, technological and antioxidant properties of Opuntia ficus-indica Mill. mucilage

2022

Opuntia ficus-indica Mill. fruit and cladodes are a source of mucilage, a carbohydrate complex, as well as of phytochemicals and other nutrients, useful in the food industry. Despite the environmental-based composition variability studied, there is no information on its seasonal variability, which is particularly important for its industrial use. In this study, some technological, nutritional, and bioactive properties of O. ficus-indica Mill. cladodes mucilage were analysed during the seasonal growth period. Total proteins did not change during the whole period and the lipid content significantly decreased from winter to the onset of summer. The fatty acid profile showed high levels of palm…

Proceedings of the Seventh International Congress on Cactus Pear and Cochineal

2013

THE EFFECT OF ROOTS CONFINEMENT ON THE RELATIVE GROWTH OF ROOTS AND CANOPY OF OPUNTIA FICUS-INDICA

Summary The influence of soil volume on roots and canopy growth performance of cactus pear (Opuntia ficus-indica) was studied at Palermo University. In November 2014, 1-year-old Opuntia ficusindica cladodes were planted in five different volumes of soil 50, 33, 18, 9 and 5 Liters. Three replicates (plants) per pot size were dug out at 6 and 12, 18 and 24 month intervals, thus in total, there were 5 x 3 x 4= 60 experimental plots. The resulting experimental design was a completely randomized design with combinations of two factors, soil volume and month of the sampling, with three replications. Roots of each plant were washed and visually divided into three groups depending on their diameter…