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Clasificación botánica y morfología de manzano, peral, duraznero y ciruelo

In book: Los frutales caducifolios en Colombia - Situación actual, sistemas de cultivo y plan de desarrollo, Chapter: Clasificación botánica y morfología de manzano, peral, duraznero y ciruelo, Publisher: Sociedad Colombiana de Ciencias Hortícolas, Bogotá, Editors: Diego Miranda, Gerhard Fischer, Carlos Carranza, pp.21-30
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    Los frutales caducifolios en Colombia - Situación actual, sistemas de cultivo y plan de desarrollo, edited by Diego Miranda, Gerhard Fischer, Carlos Carranza, 01/2013: chapter Comportamiento de los frutales caducifolios en el trópico: pages 31-46; Sociedad Colombiana de Ciencias Hortícolas, Bogotá., ISBN: 9789589867877
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    ABSTRACT: The effects of shading on spur leaf and fruit growth and quality of Pyrus communis L. cv. `Bartlett' were evaluated in the High Valley region of Argentina. The trees were trained to palmette leader and fruit load was low. Treatments were application of shade using a 80% saran shade cloth, applied at two stages of fruit development: 2 October–3 December 1996 (14 days after full bloom (DAFB) to 76 DAFB, Stage I) and 3 December 1996–23 January 1997 (76–128 DAFB, Stage II). Meteorological data were continuously monitored. Shading during Stage I decreased area per spur leaf, specific leaf mass and fruit diameter by 16.70%, 20.88% and 10.80%, respectively, at 76 DAFB. There was no significant treatment effect on final fruit size, although shaded fruits tended to be smaller. Microscopic examinations showed contrasting anatomical features in leaves that were exposed to different light regimes. Induction of early fruit drop by cloth-covering individual branches during Stage I was also demonstrated here. Shading during Stage II yielded significantly (P≤0.05) smaller fruits as compared to control and light reduction did not affect fruit firmness and soluble solids concentration. It was concluded that early shading reduced spur vigor and fruit load, whereas late shading diminished fruit size. These results suggest some goals of pruning and training for optimizing yield, by efficiently converting captured sunlight into fruit.
    Scientia Horticulturae 01/1998; · 1.50 Impact Factor
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    ABSTRACT: A population of 1,149 pear individuals from Slovakia is analysed according to their morphological characteristics of fruits and leaves. Three basic taxa were identified - Pyrus pyraster, Pyrus amphigenea and Pyrus nivalis. Qualitative traits (shape of leaf blade, fruit shape, type of leaf or fruit base, etc.) allowed the exact identification of a particular taxon only in some cases. Quantitative characteristics of leaves proved to be more suitable for the identification of analysed taxa. Statistically significant dif - ferences were found between all studied taxa in the values of leaf length and width, and also in the values of relative characteristics that described the leaf shape. Exceptionally the length of leaf petiole had very variable values (Sx% = 25.70-29.75%), therefore it was impossible to classify the species according to this character. Generally, fruit shapes and dimensions are less representative for taxonomy use although significant differences between all studied taxa were found in the values of fruit length. The correct taxonomic classification of pears cannot be done according to one characteristic. It is important to consider a few of them (shape and length of leaf blade or its slenderness, shape quotients and also the shape and length of fruits) for the appropriate classification of pear individuals.
    Horticultural Science (HORTSCI) 01/2003; 30(3):98-107. · 0.79 Impact Factor

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