The use of compost made from the leaves of Juglans regia has long been controversial because of i... more The use of compost made from the leaves of Juglans regia has long been controversial because of its inhibitory effect due to the presence of juglone. Therefore, the aim of our study was to replicate the typical habits of farmers and gardeners, where the dried leaves are collected at the end of the season and placed in a composter. Then, the effects of the different treatments on the yield of the plant (lettuce), secondary metabolism, and possible toxicity of the compost of the grown plant were evaluated. The lowest yield of lettuce was obtained in soil with composted walnut and hazelnut leaves, while the highest yield was recorded in in soil with compost control, soil with composted walnut leaves and grass with the addition of composting agent and soil with composted walnut leaves with addition of composting agent. Some allelochemicals were still present in the compost but at such low levels that they did not affect yield. We suggest that dry walnut leaves and cut grass can be used ...
OSTERC G., STEFANCIC M., SOLAR A. & STAMPAR F. 2007. The effect of severance date on rooting abil... more OSTERC G., STEFANCIC M., SOLAR A. & STAMPAR F. 2007. The effect of severance date on rooting ability of chestnut cuttings and associated changes in phenolic content during adventitious root formation. - Phyton (Horn, Austria) 46 (2): 285-294, 1 figure. - English with German summary. The relation between the date of cutting severance (May 30 th , June 12 th , June 27 th and July 18 th ) and the rooting ability of two different hybrid (Castanea crenata x Castanea sativa) chestnut clones ('Marsol' and 'Maraval') was studied in relation to the accumulation of different phenolics in basal parts and leaves of the cuttings during the first days after cutting preparation. The 'Maraval' clone had a significantly higher rooting ability than the 'Marsol' clone. The cuttings collected on the earliest date (May 30 th ) tended to the best rooting results (high rooting ratio, low callus formation) for both clones. The concentrations of caffeic and sinapic acid in th...
Hazelnut (<i>Corylus avellana</i> L.) is one of the most important tree nut crops in ... more Hazelnut (<i>Corylus avellana</i> L.) is one of the most important tree nut crops in Europe. Germplasm accessions are conserved in <i>ex situ</i> repositories, located in countries where hazelnut production occurs. In this work, we used ten simple sequence repeat (SSR) markers as the basis to establish a core collection representative of the hazelnut genetic diversity conserved in different European collections. A total of 480 accessions were used: 430 from <i>ex situ</i> collections and 50 landraces maintained <i>on-farm</i>. SSR analysis identified 181 genotypes, that represented our whole hazelnut germplasm collection (WHGC). Four approaches (utilizing MSTRAT, Power Core, and Core Hunter's single- and multi-strategy) based on the maximization (M) strategy were used to determine the best sampling method. Core Hunter's multi-strategy, optimizing both allele coverage (Cv) and Cavalli-Sforza and Edwards (Dce) distance with equal...
The use of compost made from the leaves of Juglans regia has long been controversial because of i... more The use of compost made from the leaves of Juglans regia has long been controversial because of its inhibitory effect due to the presence of juglone. Therefore, the aim of our study was to replicate the typical habits of farmers and gardeners, where the dried leaves are collected at the end of the season and placed in a composter. Then, the effects of the different treatments on the yield of the plant (lettuce), secondary metabolism, and possible toxicity of the compost of the grown plant were evaluated. The lowest yield of lettuce was obtained in soil with composted walnut and hazelnut leaves, while the highest yield was recorded in in soil with compost control, soil with composted walnut leaves and grass with the addition of composting agent and soil with composted walnut leaves with addition of composting agent. Some allelochemicals were still present in the compost but at such low levels that they did not affect yield. We suggest that dry walnut leaves and cut grass can be used ...
OSTERC G., STEFANCIC M., SOLAR A. & STAMPAR F. 2007. The effect of severance date on rooting abil... more OSTERC G., STEFANCIC M., SOLAR A. & STAMPAR F. 2007. The effect of severance date on rooting ability of chestnut cuttings and associated changes in phenolic content during adventitious root formation. - Phyton (Horn, Austria) 46 (2): 285-294, 1 figure. - English with German summary. The relation between the date of cutting severance (May 30 th , June 12 th , June 27 th and July 18 th ) and the rooting ability of two different hybrid (Castanea crenata x Castanea sativa) chestnut clones ('Marsol' and 'Maraval') was studied in relation to the accumulation of different phenolics in basal parts and leaves of the cuttings during the first days after cutting preparation. The 'Maraval' clone had a significantly higher rooting ability than the 'Marsol' clone. The cuttings collected on the earliest date (May 30 th ) tended to the best rooting results (high rooting ratio, low callus formation) for both clones. The concentrations of caffeic and sinapic acid in th...
Hazelnut (<i>Corylus avellana</i> L.) is one of the most important tree nut crops in ... more Hazelnut (<i>Corylus avellana</i> L.) is one of the most important tree nut crops in Europe. Germplasm accessions are conserved in <i>ex situ</i> repositories, located in countries where hazelnut production occurs. In this work, we used ten simple sequence repeat (SSR) markers as the basis to establish a core collection representative of the hazelnut genetic diversity conserved in different European collections. A total of 480 accessions were used: 430 from <i>ex situ</i> collections and 50 landraces maintained <i>on-farm</i>. SSR analysis identified 181 genotypes, that represented our whole hazelnut germplasm collection (WHGC). Four approaches (utilizing MSTRAT, Power Core, and Core Hunter's single- and multi-strategy) based on the maximization (M) strategy were used to determine the best sampling method. Core Hunter's multi-strategy, optimizing both allele coverage (Cv) and Cavalli-Sforza and Edwards (Dce) distance with equal...
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