Black spot disease, which is caused by the Japanese pear pathotype of the filamentous fungus Alternaria alternata (Fries) Keissler, is one of the most harmful diseases in Japanese pear cultivation. We mapped a gene for susceptibility to black spot disease in the Japanese pear (Pyrus pyrifolia Nakai) cultivar 'Kinchaku' (Aki gene) at the top of linkage group 11, similar to the positions of the s...

Cultured pear (Pyrus communis L. cv Passe Crassane) cells were subjected to temperatures of 39, 42, and 45[deg]C. Heat-shock protein (hsp) synthesis was greater at 30[deg]C than at temperatures above 40[deg]C and continued for up to 8 h. Both cellular uptake of radiolabeled methionine and total protein synthesis were progressively lower as the temperature was increased. Polysome levels decrease...

Das Bunge-Wand-Weber-Modell wurde in der Literatur bereits angewendet, um Modellierungssprachen wie das Entity-Relationship-Model oder die Unified Modeling Language zu evaluieren. In diesem Beitrag wird aufbauend auf dem Bunge-Wand-Weber-Modell eine Methode zur Evaluierung von Referenzmodellen eingeführt. Zentrales Konzept dieser Methode ist die ontologische Normalisierung eines Referenzmodells...

Gametophytic self-incompatibility in Japanese pear (Pyrus pyrifolia Nakai) is controlled by the single, multi-allelic S-locus. Information about the S-genotypes is important for breeding and the selection of pollen donors for fruit production. Rapid and reliable S-genotype identification system is necessary for efficient breeding of new cultivars in Japanese pear. We designed S allele-specific ...

The Chinese pear psyllids, Cacopsylla spp., associated with Pyrus ussuriensis are reviewed. Three new species, C. accincta sp. n., C. burckhardti sp. n., and C. cinereosignata sp. n., are described. Cacopsylla liaoli (Yang & Li), C. qiuzili Li, C. maculatili Li and C. chinensis (Yang & Li) are redescribed. A key to the adults of the seven species and a key to nymphs of three species are given.

studies on contents of phenolic compounds and diterpenes in Salvia miltiorrhiza Bunge root during the vegetation period were carried out. In Polish climate and soil condition, the tanshinone II a occurred as the dominant compound from diterpenes group. obtained results show that the most profitable period for harvesting Salvia miltiorrhiza raw material is fructification stage. however, it is ve...

Shoot-tip cultures of Pyrus elaeagrifolia Pallas, an important gene source for drought and chlorosis resistance in pear rootstock breeding, were established from a wild mature tree originated from seed. Murashige and Skoog basal medium supplemented with different concentrations of benzyladenine (BA) singly or in combination with auxin was used in the study. In the initial culture, the highest p...

Marino, P., Schicchi, R., Barone, E., Raimondo F. M. & Domina G.: First results on the phenotypic analysis of wild and cultivated species of Pyrus in Sicily. — Fl. Medit. 23: 237-243. 2013. — ISSN: 1120-4052 printed, 2240-4538 online. Phenotypic analysis of Pyrus in Sicily using a set of 19 characters on 71 accessions belonging to 7 species is here reported. Results show a high level of morphol...