Biologia plantarum, 1961 (vol. 3), issue 1

Article

Changes in glucose and fructose level inNicotiana alata styles and ovaries accompanying compatible and incompatible pollen tube growth

Jaroslav Tupý

Biologia plantarum 3:1-14, 1961 | DOI: 10.1007/BF02933498

If the flowers for experiment were separated from the plants one day before pollination and incubated in water at a temperature of 25° C, pollen tube growth in the pistils made itself apparent during the following three days in the glucose and fructose level. On the first day after pollination the amount of these sugars in the apical style parts was higher in non-pollinated flowers, while on the other hand, in most cases it was lower in the basal sections and ovaries than in the corresponding parts of pollinated flowers. During the next two days there was a greater loss of both carbohydrates where pollination, particularly allogamy, occurred, so that...

The effect of fruits on osmotic pressure of cell sap of leaves and on flower-bud formation in apple trees

Ludvík Chvojka

Biologia plantarum 3:15-28, 1961 | DOI: 10.1007/BF02933499

The author investigated in the course of two years the osmotic pressure of 70 trees of 7 apple tree sorts, 5 of these bearing fruit periodically and 2 every year. At the beginning of the experiment, one half of the trees were without fruit and the other half with fruit-set. The experiment was carried out on 10-12-year-old trees (stock M II, M IX and M IV) in the NW apple-growing region of Bohemia (Střčžovice, Těchobuzice). Three or four times during every vegetation season leaves of brachyblasts of fruit-bearing and resting apple trees were removed and the osmotic pressure of their cell sap as well as its electric conductivity were measured. Once in...

Transmission of the clover phyllody virus by means of the leaf hopper euscelis plebejus (Fallen)

Miloš Musil

Biologia plantarum 3:29-33, 1961 | DOI: 10.1007/BF02933500

Seven strains of the clover phyllody virus originating from different localities in Slovakia were transmitted by means of the leafhopperEuscelis plebejus (Fallen) toTrifolium repens L.,T. pratense L.,T. hybridum L.,Senecio vulgaris L.,Taraxacum officinale WEB.,Chrysanthemum carinatum SCHOUSB.,Vinca rosea L. andThlaspi arvense L. Thus the ability ofE. plebejus to transmit the clover phyllody virus occurring in Slovakia was confirmed. The incubation (latent) period of virus in the vector lasted about a month and the percentage of leafhoppers which became viruliferous amounted to 30-60%....

La variabilité du niveau du virus de la jaunisse chez Allium ampeloprasum L. subsp. porrum L. (REGEL)

Ctibor Blattný

Biologia plantarum 3:34-38, 1961 | DOI: 10.1007/BF02933501

1. Le cicadineCalligypona pellucida FABR. est très vraisemblablement le vecteur des souches européennes de la jaunisse à virus des asters, les transmettant sur le poireau et l'oignon; cette maladie se manifeste surtout par la prolifération de 1'inflorescence.
2. Cette maladie n'était pas transmise par greffage des secteurs du bulbe du poireau atteint sur les bulbes de poireaux sains. On en peut donc conclure que le virus n'est pas présent dans le bulbe, ou qu'il n'y est qu'en quantité très petite, ou encore qu'il ne peut persister en état actif.
3. Le rapport entre les poireaux proliférés et les fleurs en l'inflorescence...

Absorption and distribution of sodium, phosphorus, chlorine, calcium and zinc in some selected woody ornamentals

Martin J. Bukovac, Harold Davidson

Biologia plantarum 3:39, 1961 | DOI: 10.1007/BF02933502

The foliar absorption and subsequent distribution of sodium, chlorine, calcium and zinc in one-year-old rooted cuttings ofForsythia intermedia ZABEL, and root absorption of phosphorus byTaxus cuspidata SIEB. and Zucc, was established. The percentage of the applied nutrient translocated out of the treated leaf was used as a criterion of mobility. Sodium and chlorine were found to be mobile, calcium immobile, and zinc slightly mobile. Less than one percent of the phosphorus applied to the shoots of both actively growing and semi-dormantTaxus cuspidata plants was recovered in the roots after a 12-day absorption-transport period. Six...

Investigation of free amino-acids in cross-, self- and non-pollinated pistils ofNicotiana alata

Jaroslav Tupý

Biologia plantarum 3:47, 1961 | DOI: 10.1007/BF02933503

The growth of pollen tubes evokes changes in the level of free amino-acids in the style. This has been demonstrated in the cases of alanine, valine, leucine-isoleucine, serine, threonine, γ-aminobutyric acid, asparagine, glutamic acid and proline. These changes take place mainly in the parts of the style where the pollen tubes are present.
The most marked changes are an increase in the level of γ-aminobutyric acid and alanine and a decrease in glutamic acid. The intensity of these processes is much greater following compatible pollination than in the case of incompatible autogamy. On the assumption that the main course of γ-aminobutyric...

Heredity of the branched quality of rye spikes accompanied by multiplication of blossoms and inflorescence parts

Josef Nečas

Biologia plantarum 3:65-74, 1961 | DOI: 10.1007/BF02933504

In a hybridisation experiment, the hereditary fixation of mutations of a branched form of rye, characterized by an enlargēd number of blossoms and inflorescence parts, was studied. It was found that the hereditary fixation of this form was monomerily recessive with respect to the rye sort Dobřenická trsnatá, the spike formation being normal. It was also shown that neither particularly good nor particularly bad soil conditions had any effect on the split ratio of 3 : 1 in the F₂ generation. The mutation form studied was stable within a very wide interval of soil and climatic conditions. We are probably dealing here with a stable disturbance...

Inheritance of some leaf characters inSalvia němecii HBý

Karel Hrubý

Biologia plantarum 3:75, 1961 | DOI: 10.1007/BF02933505

As the species hybridSalvia němecii (= S. nutans x S. jurišićii) is highly fertile, genetic analysis of the segregating F2 generation has been carried out. In 238 plants of F2 the following leaf characters were investigated: type of the vascular bundle course in the petiole, the ratio of the petiole to leaf blade length, the ratio of the length of the leaf blade to the breadth, and the segmentation of the leaves, i.e. ratio between an ideal contour surface and the actual surface of the leaf blade. All these characteristics were compared with those of the original parental species as well as of the F1 generation. It was found that:
1. Type...