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Akgül Davut Soner Yıldız Murat Güngör Savaş Nurdan Bülbül İzzet Özarslandan Mümine Leon Maela Armengol Josep 《European journal of plant pathology / European Foundation for Plant Pathology》2022,164(1):21-32
European Journal of Plant Pathology - Black-foot (BF) disease of grapevines in nurseries and young vineyards is caused by soil-borne Cylindrocarpon-like asexual morphs. They can be found both in... 相似文献
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Maela Lupo Brenda L. Fina María C. Aguirre Mirta Armendariz Alfredo Rigalli 《Water, air, and soil pollution》2012,223(8):5221-5225
The upper limit of fluoride concentration in water for human consumption is 1.5?ppm. Many studies have been carried out concerning the water fluoride concentration in wide areas around the world, but none have studied the change of fluoride concentration as a function of geographical coordinates and through time. This paper describes ??microvariation?? of fluoride concentration among wells separated by less than 500?m in a month. On the other hand, ??macrovariation?? is also studied describing changes among cities that are separated by more than 10?km and compared with fluoride concentrations measured 65?years ago. Fluoride concentration was measured in a wide geographical area of Argentina, which is 133,000?km2. Samples of water were collected from different regions. Macrovariation: Differences in fluoride concentration in well water among regions were found, as well as an increase in water fluoride concentration during seven decades. Microvariation: Daily water fluoride concentration in a specific area displayed a great variation in the measurements through time. In addition, wells with no more than 500?m of separation were measured at the same time and were significantly different. These results indicate that in order to determine the fluoride concentration of a region, different samples of the same area should be obtained and a sampling through time should also be done. 相似文献
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Luis A. Álvarez-Bernaola Javier Javier-Alva Antonio Vicent Maela León José García-Jiménez 《European journal of plant pathology / European Foundation for Plant Pathology》2007,118(3):295-298
In 2002, a severe fruit spot of sweet lime (Citrus limetta) was observed in Piura and Lambayeque provinces in northern Peru. Affected fruits showed large oval and sunken lesions, often
surrounded by chlorotic haloes. Septoria sp. was isolated from affected fruits. Sweet lime isolates showed larger pycnidia and pycnidiospores than those of Septoria spp. previously described on citrus. In addition, phylogenetic analysis of the ITS sequences clearly separated the sweet
lime isolates from S. citri and S. citricola. Isolates were pathogenic to detached sweet lime fruits and the fungus was isolated from lesions on inoculated fruits. 相似文献
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Luis Armando Alvarez Maela León Paloma Abad-Campos José García-Jiménez Antonio Vicent 《European journal of plant pathology / European Foundation for Plant Pathology》2011,129(1):103-117
Considerable tree losses have been observed during the past few years in Spain due to Phytophthora branch canker of clementines
caused by Phytophthora citrophthora. The emergence of this disease led to the speculation that either the pathogen has evolved increasing its aggressiveness
or specificity to clementines. A total of 134 isolates of P. citrophthora collected from 2003 to 2005 in 135 citrus orchards in Spain and 22 reference isolates were analyzed genotypically and phenotypically
to determine the structure of the population. Genotypic diversity was evaluated by means of Inter-Simple Sequence Repeat (ISSR)
markers. Among the phenotypic characteristics examined, sporangial characters, sexual behavior, growth rates and colony morphology
of the isolates at different temperatures were studied. The aggressiveness and host-specificity of selected isolates were
evaluated by pathogenicity tests on sweet oranges and clementines under field conditions. Phytophthora branch canker of clementines
was associated mainly with one genotype (P-1), which included 88% of the isolates obtained from branches. Strains isolated
years before the first disease outbreak clustered also with this major genotype, thus it may be considered as a predominant
population. Thirteen other minor genotypes were determined, but most contained only one isolate. Although there was wide variation
in the morphological and physiological characters, all Phytophthora isolates obtained from branch cankers were sexually sterile
and showed a characteristic petalloid colony pattern. As in previous greenhouse studies, pathogenicity tests under field conditions
demonstrated that clementines and their hybrids were more susceptible to P. citrophthora than sweet oranges. However, no evidence was found to support the hypothesis that the emergence of the disease was associated
with more aggressive or host-specific forms of P. citrophthora. 相似文献
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