2,715 Works

Not every edible orange milkcap is Lactarius deliciosus: first record of Lactarius quieticolor (sect. Deliciosi) from Brazil

Alexandre G. Dos Santos E Silva-Filho, Marcelo Sulzbacher, Tine Grebenc & Felipe Wartchow
The natural distribution of species of Lactarius sect. Deliciosi is mainly in the northern hemisphere, where they grow in ectomycor-rhizal symbiosis mainly with conifers. Several species in this sec-tion are regionally well known and appreciated due to their culinary use. In South America, there is limited knowledge of their presence and harvesting, while their culinary value remains underexploited. Recently, field campaigns in pine plantations in southern Brazil revealed wide presence of Lactarius sect. Deliciosi species....

Influence of water deficits on grape berry growth

H. Ojeda, A. Deloire & A. Carbonneau
The effects of early and late water deficits on pericarp cell division and enlargement of Syrah berries (Vitis vinifera L.) was determined by DNA extraction and quantification. Different periods and different levels of water deficit were applied between anthesis and maturity to grapevines growing under controlled water supply in two consecutive years. DNA extraction profiles showed that water deficit did not affect cell division. Reduction of berry size and berry weight was caused exclusively by...

Flavescence doree in France and Italy - Occurrence of closely related phytoplasma isolates and their near relationships to Palatinate grapevine yellows and an alder yellows phytoplasma

E. Angelini, D. Clair, M. Borgo, A. Bertaccini & E. Boudon-Padieu
Grapevine yellows (GY) are diseases of Vitis vinifera caused by phytoplasmas. On the basis of DNA analysis, it is possible to distinguish different groups and subgroups among grapevine phytoplasmas. Flavescence doree (FD), the most serious problem in European vineyards, is caused by a phytoplasma which belongs to the elm yellows group (EY or 16SrV), Differences between 7 phytoplasma isolates in this group, found until now in French, Italian and German grapevines, and 4 phytoplasmas in...

Molecular detection of Grapevine fleck virus-like viruses

T. El Beaino, S. Sabanadzovic, M. Digiaro, N. Abou Ghanem-Sabanadzovic, P. E. Kyriakopoulou & G. P. Martelli
Molecular reagents have been developed for virus-specific and simultaneous (virus-non-specific) detection of Grapevine fleck virus (GFkV) and allied viruses, ie. Grapevine asteroid mosaic-associated virus (GAMaV) and Grapevine red globe virus (GRGV). Degenerate primers designed on nucleotide sequences of the RNA-dependent RNA polymerase (RD) and methyltransferase (MTR) domains of the GFkV genome, were able to give amplification products of the expected size from total nucleic acid extracts of: • vines infected with GFkV, GAMaV, and GRGV;...

Influence of oxygen supply on the susceptibility of cv. Palomino fino must to browning

R. Castro & C. G. Barroso
Experiments have been conducted on the oxidation of must (cv. Palomino fine). At the initial decanting process prior to fermentation, wines produced from hyperoxidized must had a reduced content of oxidable polyphenolic compounds and a reduced tendency to browning; they maintained these characteristics after bottling. Intermediate doses and the combined use of oxygen and sulphur dioxide were not fully effective in resolving the problem of browning for must of this grape variety, The larger the...

The Muscats: A molecular analysis of synonyms, homonyms and genetic relationships within a large family of grapevine cultivars

M. Crespan & N. Milani
The Muscats are a large, wide-spread family of grapevines, having in common besides the name the typical Muscat flavour. A huge number of synonyms and homonyms makes it difficult to identify them. Sixty-four accessions were analysed in the present work; they are representatives of the huge variability of this family as far as morphological aspects, berry colour and size, time of ripening and aptitude for wine and/or table grape production are considered. An analysis was...

Evolution de la composition en polyamines des baies de raisin au cours du processus d'infection par Botrytis cinerea

A. Darrieumerlou, L. Geny, M. Broquedis & B. Donèche
Evolution of polyamine composition in grape berries during infection with Botrytis cinerea Polyamines are growth regulators occurring naturally in grapevine(Vitis vinifera L.) and pathogenic fungi, e.g. Botrytis cinerea. Investigation of polyamines of in vitro-grown Botrytis cinerea mycelium and infected berries has shown modifications in the metabolism of the berries which are directly related to the development of the fungi in the berries. The abnormal polyamine concentrations in infected berries appear to be of fungal origin...

The aroma glycosides composition of Burgundy Pinot noir must

D. Chassagne, H. Alexandre, C. Massoutier, C. Salles & M. Feuillat
Research Note

Allelic variation observed at one microsatellite locus between the two synonym grape cultivars Black Currant and Mavri Corinthiaki

J. Ibanez, M. T. De Andres & J. Borrego
Research Note Black Currant and Mavri Corinthiaki are considered synonyms for Corinthe Noir, a parthenocarpic seedless raisin cultivar. No differences between them were found by RAPD analysis with 1 1 primers. They also have the same genotype in 15 out of 16 microsatellite loci, demonstrating the Black Currant and Mavri Corinthiaki are essentially identical. Nevertheless, a difference was observed in one allele at one locus (VVMD7): the Black Currant genotype is 240:246 while the Mavri...

Analysis of genetic relationships among Muscat grapevines in Apulia (South Italy) by RAPD markers

G. Fanizza, M. G. Corona & P. Resta
Two hundred 10-mer primers of arbitrary nucleotide sequence were used to study the genetic relationships among Muscat grapevines in Apulia. The coefficients of similarity of these genotypes were determined with 484 polymorphic RAPD bands (profiles). The bootstrap sampling analysis revealed that the number of RAPD bands was suitable to estimate the coefficients of similarity. The pattern of aggregation among genotypes (cluster analysis, principal coordinate analysis) indicates a diversity among the Muscats in Apulia except for...

Differentiation and identification of White Riesling clones by genetic markers

F. Regner, Elisabeth Wiedeck & A. Stadlbauer
Three different marker systems were used to genotype 10 clones of the grapevine cultivar White Riesling. All clones could be differentiated by means of genetic polymorphism gained by RAPD, SSR or Inter-SSR markers. While RAPD profile lacks stability for an identificational approach, individual SSR and Inter-SSR alleles could be retrieved within samples of the same clone. The polymorphic DNA fragments confirm the genetic variability within a traditional grapevine cultivar and the reproducibility of some of...

Effect of grafting on grapevine chlorosis and hydraulic conductivity

L. Bavaresco & C. Lovisolo
In a pot experiment the following grapevines were grown in a calcareous soil: Pinot blanc own-rooted and self-grafted, grafted on SO 4 and on 3309 C; SO 4 own-rooted, self-grafted and grafted on Pinot blanc; 3309 C own-rooted, self-grafted and grafted on Pinot blanc. The occurrence of chlorosis was strongly affected by graft combinations. In self-grafted 3309 C plants the specific conductivity was significantly reduced as compared to own-rooted ones. Own-rooted SO 4 plants showed...

Populations of grape phylloxera gallicoles on rootstock foliage in Hungary

J. Granett & L. Kocsis
Populations of gallicole grape phylloxera (Daktulosphaira vitifoliae FITCH) were monitored in Keszthely, Hungary from June through October 1998 on foliage of the Vitis berlandieri PLANCH. x V. riparia MICHX. rootstock cultivar Teleki 5 C. Though population size peaked in August, leaves from June through September were equally supportive of gallicole development and egg production. Demography varied with leaf position on shoots with the leaf in the terminal position having the most immature populations. Leaves 5...

Bernhard Husfeld zum 100. Geburtstag am 9. Mai 2000

G. Alleweldt
One hundredth anniversary of Bernhard Husfeld

Bienen schützen – warum?

Die Redaktion
Journal für Kulturpflanzen, Bd. 72 Nr. 5 (2020): Themenheft Bienenschutz

Incidence d'une activité glucanasique exogène sur le devenir des macromolécules levuriennes du vin

M. Guilloux-Benatier, B. Puech & M. Feuillat
L'addition d'une preparation enzymatique contenant des activités pectinasiques et β (1→ + 3) glucanasiques sur les lies levuriennes est testée en rnilieu vin et en milieu synthétique. Son intérêt est double: hydrolysedes macromolécules présentes initialement dans le milieu et accéleration de la désorganisation du réseau glucanes de la paroi levurienne. Ceci se traduit par une augmentation de la libération de mannoprotéines d'environ 50 kDa. Influence of exogenous glucanase activity on the yeast macromolecules in wine...

Phytoplasmas in Australian grapevines - detection, differentiation and associated diseases

Karen S. Gibb, F. E. Constable, J. R. Moran & A. C. Padovan
Phytoplasmas associated with Australian grapevine yellows (AGY) symptoms were detected using the polymerase chain reaction (PCR). To optimise the diagnostic, nested PCRs were compared with single PCRs using different primer pairs. Grapevine DNA known to be AGY phytoplasma positive was serially diluted and subjected to nested and single round PCR tests to determine which was the most sensitive. Samples taken over two growing seasons were used to determine the optimum sampling time for phytoplasma detection....

The phenolic composition of red grapes and wines as influenced by Oidium tuckeri development

Barbara Piermattei, A. Piva, M. Castellari, G. Arfelli & A. Amati
Research Note

Diversity assessment of seedlings from self-pollinated Sangiovese grapevines by ampelography and microsatellite DNA analysis

Ilaria Filippetti, Oriana Silvestroni, M. R. Thomas & C. Intrieri
A population of Vitis vinifera L. seedlings deriving from a single self-pollinated Sangiovese vine were assayed for diversity by ampelographic and genetic techniques. After field-transplantation in 1987, the seedlings were initially screened in 1995. Twenty-four seedlings were of standard Vigour and grape production. Woody cuttings from the 24 seedlings and the mother plant were self-rooted in 1995, and each Vine was morphologically analysed and compared in 1997 using 31 descriptors of the ampelographic data sheet...

Evaluation of salt tolerance of in vitro-grown grapevine rootstock varieties

A. Troncoso, C. Matte, M. Cantos & S. Lavee
The response of 11 grapevine rootstock varieties to increasing salt concentrations (0, 50, 85, 120, 155 mM NaCl) was studied under in vitro and growth chamber conditions. The effect of salinity on the mortality of explants was compared with that of plantlets grown under growth chamber conditions and with data in literature on rootstock resistance under field conditions. In addition, in vitro stem elongation bud number, and rooting ability were related to salinity. The rootstock...

Biological control of Agrobacterium vitis using non-tumorigenic agrobacteria

C. Bazzi, M. Alexandrova, E. Stefani, F. Anaclerio & T. J. Burr
The potential use of non-tumorigenic agrobacteria for the biological control of grapevine crown gall in Italy was investigated. Four Agrobacterium strains belonging to the species radiobacter and vitis were used to protect the susceptible cv. Malvasia Istriana grafted on the rootstock 420 A. Moreover, the effect of each treatment on grapevine vitality and growth was assessed, including the percentage of marketable vines, as determined by industry standards. Treatments with the antagonists clearly reduced tissue colonization...

Relationship between tissue growth, CO2 level and tendril formation during in vitro culture of grape (Vitis vinifera L.)

P. Thomas
In vitro cultures of grapevine cultivar Arka Neelamani growing in MURASHIGE and SKOOG (1962) medium containing 3% sucrose and incubated under 16 h light (30-10 µmol.m-2s-1) per day showed high CO2 levels (600-11900 ppm) at the end of the dark period and a significant decline during the light period (330-980 ppm) indicating photosynthetic activity and photomixotrophic growth characteristic. The CO2 level at the end of a 8-h-dark period was shown to be related to the...

Opening of flowers and time of anthesis in grapevines, Vitis vinifera L.

G. Staudt
During two years, opening of flowers in Vitis vinifera, cvs Muller-Thurgau and Blauer Spatburgunder was investigated. At average weather conditions flowers opened in periods of about 24 h. Opening started about 5:00, reached a maximum between 7:00 and 9:00 and was finished at about 12:00. Within an inflorescence, opening of flowers reached a maximum on the 5th or 6th d and was finished after 7 d, i.e. 7 periods. The diurnal rhythm was probably regulated...

Reductions in bud carbohydrates are associated with grapevine bud necrosis

L. Vasudevan, T. K. Wolf, G. G. Welbaum & M. E. Wisniewski
Research Note

Agrobacterium-mediated genetic transformation of an interspecific grapevine

J. Mozsár, O. Viczián & S. Süle
Anther-derived somatic embryos (cv. Georgikon 28) were transformed with reporter gene encoding beta-glucuronidase, using the Agrobacterium tumefaciens strain EHA 101. Embryogenic calli were maintained and proliferated on MS medium containing plant growth regulators and 50 mg·l-1 kanamycin. Numerous somatic embryos were obtained by placing calli on hormone-fret MS medium supplemented with 50 mg·l-1 kanamycin. Transgenic plants were regenerated from these embryos. Application of antioxidants during and after cocultivation reduced necrotic symptoms of plant cells, while...

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  • Julius Kühn-Institut
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