Levels and Aggregation of Ribosomes during Dormancy and Dormancy Break of Peach Flower Buds

Bagni, Nello; Marino, Grazia; Torrigiani, Patrizia; Audisio, Santiago Andrés

doi:10.1111/j.1399-3054.1977.tb04029.x

Cited by 15 publications

(7 citation statements)

References 8 publications

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“…The constant amount of ribosomes per g of fresh weight results in an increase in the rihosome content in a bud while it grows during the autumn and again during the spring. This is in accordance with previous information about the amount of total RNA in similar buds (Kupila-Ahvenniemi 1966,1970, it also agrees with the results of Bagni et al, (1977) on peach flower buds.…”

Section: Discussmmisupporting

confidence: 93%

Seasonal variations in the properties of ribosome assemblies from vegetative buds of Scots pine

Kupila‐Ahvenniemi

Lindfors

Häggman³

1987

Physiologia Plantarum

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The amount of total ribosome assemblies extractable from the vegetative buds of 2 m high Scots pine (Pinus sylvestrís L.) plants remained more or less constant throughout the sampling period from September to May. The stability of the ribosomes, the shape of the polysome profiles obtained after sucrose density gradient centrifugation and the clustering of material as seen in the scanning electron micrographs suggested the presence of storage formations during the winter. All samples of isolated ribosomes were able to synthesize proteins in vitro. During midwinter the translation capacity, when calculated on a ribosome unit basis, was about one third of that found in September and May. This reflects not only the occurrence of storage formation during the winter, but also the amount of initiated translation processes at any given time. The decrease in the in vitro translation capacity in the autumn ceases around the end of November. Ribosome activity starts to increase as early as the end of January or beginning of February. It seems that the reactions are triggered either by an endogenous clock or by the change in the daylength.

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Section: Discussmmisupporting

confidence: 93%

Seasonal variations in the properties of ribosome assemblies from vegetative buds of Scots pine

Kupila‐Ahvenniemi

Lindfors

Häggman³

1987

Physiologia Plantarum

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“…In flower buds of peach, the polyribosomes were present already before dormancy and remained constant during the whole dormancy. They increased at breaking of dormancy and reached their highest level at flowering (Bagni et al 1977). In pine buds, the cytosoiic ribosomes decreased highly signiflcantly during the winter, and increased in the spring (Hiiggman et al 1985).…”

Section: Discussionmentioning

confidence: 99%

“…of Lanzhott,Lattzhott 730000,China. ... ' during dormancy and development flower buds in apple cultivars. During dormancy, synthesis of protein and nucleic acids is Interrupted (Vegis 1964, Lang et al 1985 (Bagni et al 1977, Torrigiani et al 1978. The mM borate pH 8.3. transition from dormancy to the active state in apple and cherry flower buds is characterized by a sharp increase in DNA, RNA and protein (Wang et al 1985, Materials and methods 5 1986).…”

Section: ^ 'mentioning

confidence: 99%

Changes in ribosome population and in nucleic acids during breaking of dormancy and development of apple flower buds

Liang-huan

Huang

1989

Physiologia Plantarum

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Changes in ribosome population, RNA species and DNA composition in flower buds of apples (Malus pumila Mill. cvs Ralls and White winter pearmain) were investigated during breaking of dormancy and development. After bursting of flower buds, total ribosomes increased approximately 4‐fold, and the polyribosomal fraction increased from 66% to 94% of total ribosomes. The newly synthesized ribosomes were identified by incorporation of radioactive precursor. The observed decrease in specific radioactivity of the monoribosomes is caused by the recruitment of monoribo‐somes into polyribosomes after breaking of dormancy. In both cultivars, the 25S and 18S rRNA peaks increased to a high level on April 8. The peaks of low molecular weight RNA were apparently increased after initial swelling of the flower buds. The DNA of flower buds was separated into three bands by electrophoresis. The median band is the main band of nuclear DNAs. The ahead band and the slow‐moving band are satellite components of nuclear DNAs, and they obviously rose after initial swelling of the flower buds. On April 8, when the flower buds had opened, two other small DNA bands could be detected. These results suggest that the changes in level of different ribosome populations, RNA species and DNA composition are related to dormancy breaking development of apple flower buds.

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“…Yet there seems to be a crucial demand by the common hornbeam in the colder quarter of the year when trees are considered to be dormant. Dormancy is usually stated as a period in which visible growth is not obviously apparent (Saure, 1985), but cell division and differentiation, tissue growth continue to occur at low temperatures in a slow and steady manner, and there is also active synthesis of RNA and protein during dormancy (Bagni et al, 1977). The corresponding response curve (Fig.1A) may indicate the need for a sufficient energy supply to support these processes.…”

Section: Discussionmentioning

confidence: 99%

Climatic limits for the present European distribution of hornbeam (Carpinus betulus), with special reference to Ukraine

Tytar

2018

Preprint

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In this study, we used an ecological niche modeling approach to detect the importance of diverse climatic parameters in controling the distribution of forest tree species, exemplified by the common hornbeam (Carpinus betulus L.), with special reference to Ukraine from where digitized data on the species has been scarce. In Ukraine populations of this tree species are found on the edge of its home range and are exposed to extreme climate conditions. The main objectives of the present study were to model the European-wide ecological niche of the common hornbeam and investigate primary climatic factors that control the potential distribution of this tree in Ukraine. Using an ecological niche modelling approach, we consider to have reliably modeled the European-wide bioclimatic niche of the common hornbeam for predicting the response of species' geographical distribution to climate. Most contributing to the model were the mean monthly PET (potential evapotranspiration) of coldest quarter, continentality and annual PET. In terms of the "Most Limiting Factor", in Ukraine continentality is crucial throughout the majority of the country.

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Levels and Aggregation of Ribosomes during Dormancy and Dormancy Break of Peach Flower Buds

Cited by 15 publications

References 8 publications

Seasonal variations in the properties of ribosome assemblies from vegetative buds of Scots pine

Seasonal variations in the properties of ribosome assemblies from vegetative buds of Scots pine

Changes in ribosome population and in nucleic acids during breaking of dormancy and development of apple flower buds

Climatic limits for the present European distribution of hornbeam (Carpinus betulus), with special reference to Ukraine

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