Results 161 to 170 of about 175,786 (209)

Physiological responses of cork oak and holm oak to infection by fungal pathogens involved in oak decline

Forest Pathology, 2009
SummaryThe aim of this research was to study the changes in net photosynthesis and stomatal conductance values in 3‐year‐old cork oak and holm oak seedlings growing in natural conditions and inoculated with Apiognomonia quercina, Biscogniauxia mediterranea, Botryosphaeria corticola and Pleurophoma cava.
LINALDEDDU, BENEDETTO TEODORO, Sirca C., Spano D., Franceschini A.   +3 more
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Holm Oak and Holm Oak Forests: An Introduction

1999
Why should we study the Mediterranean evergreen forests of holm oak (Quercus ilex L.)? Besides the pursuit of knowledge, two major reasons can be put forward. First, holm oak forests are a dominant type of vegetation in a transition zone between temperate forests, mostly dominated by deciduous trees and the scrublands (maquis, chaparral, phrygana, etc.)
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Soil nitrogen dynamics in a holm oak forest

Vegetatio, 1992
Soil nitrogen (N) dynamics were studied in a dense, holm oak (Quercus ilex ssp. ilex) stand in the Montseny mountains to determine annual and seasonal patterns of N availability and uptake in an undisturbed Mediterranean forest on acidic soil. Soil mineral N content, net N mineralization (NNM), and net nitrification (NN) were determined by monthly ...
D. Bonilla, F. Rod�
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Somatic embryogenesis in holm oak male catkins

Plant Growth Regulation, 2013
Peer ...
Blasco, M., Barra, A., Brisa, C., Corredoira, Elena, Segura, J., Toribio, M., Arrillaga, I.   +6 more
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Birds as predators of cork and holm oak pests

Agroforestry Systems, 2014
The recent decline of Mediterranean oak woodlands in SW Iberian Peninsula is related to insect pests which affect both cork oak (Quercus suber) and holm oak (Quercus rotundifolia). We identified twenty-six bird species as potential regular predators of twenty major pests by reviewing the diet of breeding, wintering and resident species in this ...
Ricardo S. Ceia, Jaime A. Ramos
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Cryopreservation of embryogenic tissues from mature holm oak trees

Cryobiology, 2015
The development of a vitrification method for cryopreservation of embryogenic lines from mature holm oak (Quercus ilex L.) trees is reported. Globular embryogenic clusters of three embryogenic lines grown on gelled medium, and embryogenic clumps of one line collected from liquid cultures, were used as samples. The effect of both high-sucrose preculture
Barra-Jiménez, Azahara, Aronen, Tuija S., Alegre, Jesús, Toribio, Mariano   +4 more
openaire   +3 more sources

Analysis of Holm Oak Intraspecific Competition Using Gamma Regression

Forest Science, 2009
Abstract Analysis of plant competition is a major issue in ecology and forestry, as it influences plant growth and plant-environment interactions. Competition is expected to be lower in the sparse tree stratum of open woodlands and agroforestry systems than in closed forests. We have analyzed competition in open woodlands of Quercus ilex
Gea-Izquierdo, Guillermo, Cañellas, Isabel   +1 more
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Is primary production in holm oak forests nutrient limited?

Vegetatio, 1992
Correlations between primary production and patterns of nutrient use and nutrient availability were investigated in 18 plots in closed holm oak (Quercus ilex L.) stands in the Montseny mountains (NE Spain), searching for evidence of nutrient limitation on primary production.
X. Mayor, F. Rodà
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Soda–anthraquinone, kraft and organosolv pulping of holm oak trimmings

Bioresource Technology, 2006
The operating conditions for an organosolv (ethyleneglycol) and two alkaline (soda-anthraquinone and kraft) processes for obtaining cellulose pulp and paper from holm oak (Quercus ilex) wood trimmings were optimized. A range of variation for each process variable (viz.
J, Alaejos, F, López, M E, Eugenio, R, Tapias   +3 more
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Cloning mature holm oak trees by somatic embryogenesis

Trees, 2014
Integuments from holm oak developing ovules were suitable initial explants to obtain embryogenic lines from which plants could be regenerated. The implementation of multivarietal forestry as part of breeding strategies is expected to provide more productive forest plantations.
Azahara Barra-Jiménez, Miquel Blasco, Mar Ruiz-Galea, Cristina Celestino, Jesús Alegre, Isabel Arrillaga, Mariano Toribio   +6 more
openaire   +1 more source