quercus robur/necrosis

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Anti-necrosis potential of polyphenols against snake venoms.

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Polyphenols from the extracts of Areca catechu L. and Quercus infectoria Oliv. inhibited phospholipase A(2), proteases, hyaluronidase and L-amino acid oxidase of Naja naja kaouthia Lesson (NK) and Calloselasma rhodostoma Kuhl (CR) venoms by in vitro tests. Both extracts inhibited the hemorrhagic

First Report of Geosmithia pallida Causing Foamy Bark Canker, a New Disease on Coast Live Oak (Quercus agrifolia), in Association with Pseudopityophthorus pubipennis in California.

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Declining coast live oak (Quercus agrifolia) trees have been observed since 2012 throughout urban landscapes in Los Angeles, Orange, Riverside, Santa Barbara, Ventura, and Monterey counties in California. Symptoms causing branch dieback and tree death included a cinnamon-colored gum seeping through

Sensitivity of red oak (Quercus rubra L.) and American beech (Fagus grandifolia Ehrh.) seedlings to sodium salts in solution culture.

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Sodium salt sensitivity of red oak (Quercus rubra L.) and American beech (Fagus grandifolia Ehrh.) was evaluated in solution culture. Both species showed symptoms of salt injury when grown in the presence of less than 10 mM Na. In red oak, leaf symptoms first appeared at a sodium concentration of

Seawater spray injury to Quercus acutissima leaves: crystal deposition, stomatal clogging, and chloroplast degeneration.

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Effects of seawater spray on leaf structure were investigated in Quercus acutissima by electron microscopy and X-ray microanalysis. Two-year-old seedlings of Q. acutissima were sprayed with seawater and kept in a greenhouse maintained at 25°C. The most recognizable symptoms of seawater-sprayed

The Occurrence of Charcoal Disease Caused by Biscogniauxia mediterranea on Chestnut-Leaved Oak (Quercus castaneifolia) in the Golestan Forests of Iran.

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The chestnut-leaved oak (Quercus castaneifolia) is native to the Alborz Mountains, including the Golestan Forests, in northern Iran. Trees grow up to 35 (-50) m tall with a trunk up to 2.5 (-3.5) m in diameter. During 2010, we received reports of a decline of oak trees in the Ghorogh Region of the

On the benefit of galls of Quercus brantii Lindl. in murine colitis: the role of free gallic acid.

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BACKGROUND In this study we investigated the effect of gall of Quercus brantii Lindl., a traditional Iranian medicine, in a murine model of experimental colitis induced in male rats by rectal administration of 2,4,6-trinitrobenzene sulfonic acid (TNBS). METHODS Quantification of the main active

Isolation and Characterization of Brenneria quercina, Causal Agent for Bark Canker and Drippy Nut of Quercus spp. in Spain.

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ABSTRACT The drippy nut disease of oak was first described in California in 1967 and, since then, the causal agent has not been reported in any other area. This study describes for the first time in Europe the isolation of Brenneria (Erwinia) quercina from bark canker in addition to drippy bud and

Identification of New Fungal Pathogens of Coast Live Oak in California.

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A decline of coast live oak (Quercus agrifolia) has been observed throughout southern California. In this study, the identity and pathogenicity of non-Botryosphaeriaceae fungal species consistently recovered from necrotic tissues of branch and bleeding trunk canker samples from these locations were

First Report of Root Rot Caused by Pythium spiculum Affecting Cork Oaks at Doñana Biological Reserve in Spain.

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Cork oaks (Quercus suber L.) are key tree species at Doñana Biological Reserve (DBR), Huelva, Spain. Sampling was conducted on a total of 13 trees exhibiting symptoms of decline (foliar wilting and defoliation, branch dieback, and root necrosis). In 2008. Phytophthora cinnamomi was isolated from

First Report of Root Rot of Pedunculate Oak and Other Forest Tree Species Caused by Phytophthora plurivora in the Czech Republic.

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From 2006 to 2008, several similar Phytophthora isolates were obtained from roots of mature Quercus robur and other tree species (Acer platanoides, Fraxinus excelsior, Q. rubra, and Tilia cordata) in forests and parks in several areas in the Czech Republic. The trees were characterized by chlorotic

Bur oak blight, a new disease on Quercus macrocarpa caused by Tubakia iowensis sp. nov.

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A newly recognized, late-season leaf disease of Quercus macrocarpa (bur oak) has become increasingly severe across Iowa and in neighboring states since the 1990s. Vein necrosis and leaf death may occur over the whole crown or only on the lower branches. Symptoms typically intensify year-to-year in

First Report of Diplodia quercivora Causing Shoot Dieback and Branch Cankers on Live Oak (Quercus virginiana) in the United States.

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In September 2010, live oak (Quercus virginiana Mill.) trees in an Alachua County, FL, shopping center parking lot were observed with shoot dieback and cankers on small branches. Isolations were made from canker margins by surface sterilizing tissue in 2.5% sodium hypochlorite and plating on potato

First Report of Neofusicoccum australe and N. luteum Associated with Canker and Dieback of Quercus robur in Portugal.

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Quercus robur L., commonly known as "pedunculate oak," is a long-lived deciduous tree native to most of Europe. It is of great ecological and forestry importance. It is also commonly cultivated as an ornamental tree in parks and gardens. Since 2009 and most likely related to increased

First Report of Canker Disease Caused by Botryosphaeria parva on Cork Oak Trees in Italy.

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A survey was carried out in the spring of 2003 to study the fungi associated with declining trees in a cork oak (Quercus suber L.) forest located in Sassari Province, Sardinia, Italy (40°52'N, 9°01'E) at an altitude of 150 m (above sea level). Several isolates obtained from live twigs and branches

First Report of Neofusicoccum parvum Associated with Bark Canker and Dieback of Acer pseudoplatanus and Quercus robur in Italy.

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Between 2007 and 2011, Acer pseudoplatanus and Quercus robur trees declined in the North Park and the Boscoincittà Park in Milan, Italy (lat. 45° 27' 47″ N, long. 09° 11' 16″ E, elev. 121 m). Symptoms included extensive lengthwise bark cracks, with necrosis of the wood tissue underneath. Isolations

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