Book review

Danuše Hodáňová, T. Gichner

Biologia plantarum 23:284, 1981 | DOI: 10.1007/BF02895366

Book review

Frideta Seidlová, J. Čatský

Biologia plantarum 23:317, 1981 | DOI: 10.1007/BF02895379

The effect of temperature on the uptake and loss of anions by seedling roots ofZea mays L

Margita Holobradá, I. Mistrík, J. Kolek

Biologia plantarum 23:241-248, 1981 | DOI: 10.1007/BF02895355

Intact maize seedlings were examined for the uptake and leakage of labelled sulphate and phosphate anions affected by temperature. Control plants, grown at 25 °C were compared from the aspects of uptake capacity and leakage with plants incubated in nutrient solutions cooled to 15 °C and 5 °C, respectively. Short time intervals as well as 1-7 d exposure to cooling were used. Already after 1 h exposure at 5 °C and 5 h cooling at 15 °C and at 5 °C, considerable changes were manifested in anion uptake and leakage.The uptake of³²P declined more than that of³⁵S. So, after a 30 min uptake interval the uptake of³⁵S decreased...

Enzymatic changes in gourd and bean cotyledons during ageing and the effect of detopping

R. K. Parida, M. Kar, D. Mishra

Biologia plantarum 23:249, 1981 | DOI: 10.1007/BF02895357

Cotyledons of gourd (Cucurbita maxima Duchesne) and bean (Phaseolus vulgaris L.) were used to study the changes in the activities of catalase, peroxidase, acid inorganic pyrophosphatase and alkaline inorganic pyrophosphatase during ageing and the diversion in such changes that occur when cotyledon senescence was retarded by detopping the seedlings above the cotyledons. Catalase, acid inorganic pyrophosphatase and alkaline inorganic pyrophosphatase activities declined during the senescence of the cotyledons. When cotyledon senescence was retarded by detopping as marked by the increase in the levels of chlorophyll and protein, there was...

Isoperoxidase patterns in leaf tissues of a genome series of two cultivars ofNicotiana tabacum L

L. Maršálek

Biologia plantarum 23:255, 1981 | DOI: 10.1007/BF02895359

Polyacrylamide gel electrophoresis was used to study the differences in patterns of the isoperoxidase spectrum in leaf tissues of the genome series (2n, 3n, 4n) of twoNicotiana tabacum L. cultivars,i.e. in the growth stage of the 5th-6th and 10th-11th leaf, and in the stage of elongation growth. Mutual comparisons of the cultivars showed that the variability and difference in patterns between the cultivars in later growth stages was more important. In both cultivars only one rapidly migrating main band of isoenzymes was registered within the range of Rm 0.45-0.77; only in the stage of elongation growth on the 2n and 4n levels two bands...

Autoradiographic study of the effect of 5-Fluorodeoxyuridine on barley chromosomes

M. Ondřej, Květuše Schwammenhöferová

Biologia plantarum 23:261, 1981 | DOI: 10.1007/BF02895361

FUdR 10^-4 M was applied together with [³H] TdR on the growing barley embryos cultivated in the nutrient solution. Samples were fixed 1-4 h after the onset of the treatment and microautoradiograms were prepared. All the mitoses were unlabelled, while more than 150 autoradiographic grains were found above labelled interphase nuclei; no cells that terminated S phase at the onset of the treatment passed through entire G₂ and reached mitosis during the 4 h duration of the treatment. Chromosomal fragments in anaphases appeared the first hour after the onset of the treatment. Their frequency increased from the first to the...

Shoot production fromin vitro cultured flower heads ofAllium porrum L

F. J. Novák, L. Havel

Biologia plantarum 23:266-269, 1981 | DOI: 10.1007/BF02895362

Shoots have been produced in the explants from flower head receptacles cultured on BDS medium with BAP and/or NAA. The shoots produced could be regenerated to form the whole plants and transplanted into soil. No morphological or cytological variations were observed in mature plants. The histological analysis of adventive bud formation is presented. The importance of this method for clonal propagation ofAllium porrum plants is discussed.

Some effects of the induction of gametogenesis in the populations of the homothallic algaChlamydomonas geitleri Ettl

J. Nečas, K. Tetík

Biologia plantarum 23:270, 1981 | DOI: 10.1007/BF02895364

The induction of gametogenesis in the studied homothallic alga by the transfer to a nitrogen-Less medium leads to an adaptation of the cell population until a dynamic equilibrium is attained. Throughout the adaptation, the homeostatic forces regulating the number of the cells in the population assert themselves on the basis of internal nitrogen circulation. Part of the induced cells which perform no conjugation is probably destroyed by lysing, whereas the cells being just in the pre-Induction phase as well as those having passed the phase without being induced to gametes, continue their cycles by means of the released nitrogenous substances. The conditions...

Dependence of the gametogenesis induction, zygote formation and their germination on the culture density of the homothallic algaChlamydomonas geitleri Ettl

J. Nečas

Biologia plantarum 23:278, 1981 | DOI: 10.1007/BF02895365

The induction of gametogenesis has its beginning in the most diluted cell suspension after the transfer of the cells to a nitrogen-less medium. Here, the highest percentage frequencies of zygotes are formed within the same period of time in comparison with the less diluted cell suspensions. The zygotes formed in the mostly diluted cell suspensions mature relatively very slowly and germinate very irregularly. The induction of gametogenesis retards in the denser cultures probably due to the strongest homeostatic forces trying to return the cell population to its initial stage. In our experiments up to now, the effects of the changing irradiance of the...

Latent root primordia in poplar stems

Mária Luxová, A. Lux

Biologia plantarum 23:285, 1981 | DOI: 10.1007/BF02895367

Root primordia initiate in poplar stems in the secondary growing parts, that is in the parts where the elongation growth is terminated and the leaves are mature. Their initiation is connected with the occurrence of unusual biseriate, rarely multiseriate rays. A small cell group in the secondary phloem is initiated by cell division of the ray. It gradually enlarges by continuing cell division, by the addition of cells adjacent to the cell group and by cambial activity. Thus, a hemispherical root primordium is formed, for which a permanent occurrence of reserve lipids is characteristic. In stems several years old the intraprimordial mitotic activity...

The effect of nitrogen deficiency on leaf anatomy of young spring barley plants

Blanka Rovenská, L. Nátr

Biologia plantarum 23:291, 1981 | DOI: 10.1007/BF02895369

Spring barley cv. Spartan was cultivated in a complete and nitrogen lacking Richter's solution. In other experimental variants the nitrogen was omitted after six days of cultivation in the complete nutrient solution or the nitrogen lacking solution was replaced with the complete solution after the same period of time. Anatomy of the second leaf blade was quantitatively analyzed after 12 days of cultivation. Continuous nitrogen deficiency resulted in thinning of the blade, reduction of the cross-section areas of the blade, vascular bundles and sclerenchyma region. The most sensitive reaction to the nitrogen deficiency was that of assimilation parenchyma....

Changes in the anatomical structure of the first two leaves of barley caused by the absence of nitrogen or phosphorus in the nutrient medium

J. Pazourek, L. Nátr

Biologia plantarum 23:296, 1981 | DOI: 10.1007/BF02895371

The absence of nitrogen or phosphorus in the nutrient medium affected quantitative anatomical characteristics of the first two leaves of spring barley: nitrogen deficiency brought about changes in both the leaf size and characteristics of stomata, whereas the effect of phosphorus absence was insignificant. N deficiency had an opposite effect on certain characteristics connected with volume ratios of tissues than that of P. The most marked finding is the decrease in the leaf volume and specific volume, and in specific volumes of most tissues at N deficiency and their increase at P deficiency. On the other hand, the number of stomata per unit leaf or...

Action of indol-3-acetic acid on dehydration rate of detached leaves of wheat with different ploidy level

W. Nowakowski

Biologia plantarum 23:302, 1981 | DOI: 10.1007/BF02895372

It was found that the greatest dehydration rate of detached leaves indicates theTriticum monococcum L. v.vulgare (2n = 14). The indol-3-Acetic acid distinctly decreases the dehydration rate of detached leaves of examined wheat with a different ploidy level (Triticum monococcum, Triticum dicoccum, Triticum spelta andTriticum aestivum).

Characteristics of current passage through plant tissue

M. Dvořák, Jana Černohorská, K. Janáček

Biologia plantarum 23:306, 1981 | DOI: 10.1007/BF02895374

Plant tissue connected in a d.c. circuit behaves as a capacitor, short-circuited through a resistor. Using a saw-tooth voltage (T = 2 ma, U_max = + 13 V), structural and physiological conditions in a plant tissue can be analyzed on the basis of changes in the current character.

An easy estimation of tomato root parameters based on calcium absorption

R. S. Sachan, R. B. Sharma

Biologia plantarum 23:311-314, 1981 | DOI: 10.1007/BF02895376

Using tomato as a test plant Ca absorption by the plant and characteristics of root growth in the nutrient solution has been reported. It has been shown that the amount of calcium present in the tomato shoot serves as a good index of the rate of root growth in the solution as well as in the soil. The flux of Ca, F and K into the roots of field grown tomatoes have been calculated based on such estimations of root parameters.

Amylases during different stages of seed development in wheat

M. K. Jain, A. K. Goswami

Biologia plantarum 23:315, 1981 | DOI: 10.1007/BF02895378

The β-Amylase activity was high in seeds of pre-Milk and milk stages but low in seeds of half seed and dough stages and very low at fully ripe stage of seed development. Zymogen (latent β-Amylase) was absent in half seed stage but appeared at pre-Milk stage. The content of zymogen increased progressively with advance in ripening time. No α-Amylase activity was detected at any stages of seed development in wheat.

Changes of 3,4-dihydroxybenzoic and 4-hydroxybenzoic acids inNicotiana tabacum cell suspension culture

Marie Hrubcová, Milena Cvikrová, F. Pospíšil

Biologia plantarum 23:318-320, 1981 | DOI: 10.1007/BF02895380

The optimum conditions for cell suspension culture experiments have been characterized by respiration,p-Phenylenediamine oxidase and growth of cell suspension ofNicotiana tabacum for 15 days in stationary culture. Change of 3,4-Dihydroxybenzoic and 4-Hydroxybenzoic acids both present at 10^-4 M in culture medium were studied in short term experiments. An oxidation product of 3,4-Dihydroxybenzoic acid characterized by an absorption maximum at 280 nm was isolated after 1 h of incubation. The 4-Hydroxybenzoic acid did not change when incubated for 4 h under the same conditions.

Botany: A functional approach

Jarmila Solärová

Biologia plantarum 23:248, 1981 | DOI: 10.1007/BF02895356

Plant strategies and vegetation processes

Danuše Hodáňová

Biologia plantarum 23:254, 1981 | DOI: 10.1007/BF02895358

Cobalt in biology and biochemistry

J. Ullmann

Biologia plantarum 23:260, 1981 | DOI: 10.1007/BF02895360

Photosynthesis and plant development

J. Čatský

Biologia plantarum 23:269, 1981 | DOI: 10.1007/BF02895363

Vegetation of the earth and ecological systems of the geo-biosphere

Jiřina Slavíková

Biologia plantarum 23:290, 1981 | DOI: 10.1007/BF02895368

Fungal viruses

P. Tichý

Biologia plantarum 23:295, 1981 | DOI: 10.1007/BF02895370

La Physiologie da la Floraison

J. Ullmann, Jarmila Solárová

Biologia plantarum 23:305, 1981 | DOI: 10.1007/BF02895373

Agrometeorology

Danuše Hodáňová

Biologia plantarum 23:310, 1981 | DOI: 10.1007/BF02895375

Écophysiologie des Insectes Parasites des Forets

V. Novák

Biologia plantarum 23:314, 1981 | DOI: 10.1007/BF02895377