Search results for "Pyrus communis"
showing 7 items of 7 documents
From the roots to the stem: unveiling pear root colonization and infection pathways by Erwinia amylovora
2020
ABSTRACT Fire blight caused by Erwinia amylovora affects pome fruit worldwide, generating serious economic losses. Despite the abundant literature on E. amylovora infection mechanisms of aerial plant organs, root infection routes remain virtually unexplored. Assessing these infection pathways is necessary for a full understanding of the pathogen's ecology. Using the pathosystem Pyrus communis–E. amylovora and different experimental approaches including a green fluorescent protein transformant (GFP1) and epifluorescence microscopy (EFM) and laser confocal scanning microscopy (LCSM), we demonstrated the pathogen's ability to infect, colonize and invade pear roots and cause characteristic fire…
Effect of temperature on pollen germination for several Rosaceae species: influence of freezing conservation time on germination patterns
2019
[EN] Between February 2018 and April 2018, flowers were collected from eight Rosaceae species. Flowers were kept in a freezer at -20 degrees C for three freezing times (Treatment 1, two months; Treatment 2, four months; Treatment 3, six months). After extracting pollen, in vitro germination was induced in a culture medium and incubated at six different temperatures for 72 h. The percentage of pollen germination, average pollen tube length and maximum pollen tube length were measured. Pollen germination was maximum for all species between 15 degrees C and 30 degrees C. Cydonia oblonga, Malus sylvestris, Prunus avium, Prunus domestica, Prunus dulcis, Prunus persica and Pyrus communis obtained…
Vegetative and productive responses of ‘Conference’ and ‘Williams’ pear trees planted at different in-row spacings
2006
Abstract The effect of in-row spacing on the vegetative and productive performance of 4-year-old ‘Conference’ (CON) and ‘Williams’ (WIL) pear trees was studied. Analysis of digital images was used to estimate canopy growth and conformation. Fruit quality was determined by measuring fruit weight, flesh firmness, peel color, soluble solid content, and titratable acidity. WIL produced more and more efficiently than CON, especially at closer spacings. WIL canopies were generally bigger than CON canopies, and reduced spacing penalized stem growth and influenced canopy conformation. Root growth and conformation was similar for both cultivars, whereas decreasing in-row spacing reduced root dry wei…
Development of an efficient regeneration protocol for pear rootstock Pyrodwarf and assessment of somaclonal variability using SSR analysis.
2009
Color and sensory changes in fresh cut pear during storage comparing ‘Coscia’ and ‘Butirra’, cultivated in southern Italy
2023
Pear (Pyrus communis L.) cultivars ‘Coscia’ and ‘Butirra’, cultivated in southern Italy are characterized very excellent by aroma and texture. Visual appearance is the primary descriptor that determines the acceptance of fresh-cut pears. Softening is another important quality parameter which considerably influences the acceptance of fresh-cut pears. The aim of this work was to study the effect of genotype on shelf life and quality of fresh-cut pear fruit harvested at commercial maturity stage. After cutting, pear fruit samples were stored under passive atmosphere at 5±1°C for 3, 5, 7 and 12 days. Fruit color (L*, a*, b*, ΔE), consistence, solid soluble, titratable acidity, CO2 and O2 packag…
Valutazione dei cambiamenti qualitativi di frutti di pero trattati con edible coating in post-raccolta
2021
La pera è un frutto climaterico caratterizzato da intensa attività metabolica post-raccolta, fattore che inficia notevolmente le sue caratteristiche qualitative pregiudicandone la shelf-life e obbligando gli attori economici a ricorrere a costosi metodi di condizionamento come la frigoconservazione anche quando il prodotto è destinato al consumo fresco con un conseguente aumento dei costi in fase distributiva e di commercializzazione. Lo scopo del presente lavoro è stato quello di studiare gli effetti di diversi edible coating, barriere selettive edibili facilmente realizzabili con matrici a basso costo ed ecocompatibili in grado di preservare il prodotto, su frutti di pero al fine di indiv…
Bumbieru-kadiķu rūsas (ier. Gymnosporangium sabinae) ietekme uz dažādu bumbieru Pyrus communis genotipu lapu anatomiju un morfoloģiju
2019
Bumbieru-kadiķu rūsa ir saimnieciski nozīmīga augu slimība, taču maz ir pētīts par tās ierosinātāja Gymnosporangium sabinae un sekundārā saimniekauga bumbieres mijiedarbību. Pētījumu veica APP „Dārzkopības Institūts” laika posmā no 2018. gada jūnijam līdz 2018. gada augustam. Darba mērķis bija izpētīt anatomiskās un morfoloģiskās izmaiņas lapās bumbieru genotipiem ar dažādu Gymnosporangium sabinae ieņēmību visā patogēna attīstības periodā. Darba mērķa sasniegšanai veikta bumbieru-kadiķu rūsas infekcijas attīstības vērtēšana 35 bumbieru genotipiem, no atlasītās genotipu kopas 26 genotipiem veikti lapas ūdens satura, lapas laukuma, lapas laukuma un masas attiecības mērījumi un anatomisko stru…