Book reviews

Jarmila Solárová, T. Gichner, Ivana Macháčková, J. Velemínský, J. Bříza, Ingrid Tichá, B. Vinš, Jiřina Slavíková, Helena Benešová

Biologia plantarum 1984, 26:471-476 | DOI: 10.1007/BF02909601

Editorial

Biologia plantarum 1984, 26:477-478 | DOI: 10.1007/BF02909602

Purification of cytokinins on a polyvinylpyrrolidone column followed by analysis on a reversedphase C₁₈ODS HPLC system

J. Challice

Biologia plantarum 1984, 26:401 | DOI: 10.1007/BF02909585

It has been found that cytokinins, as a class, can be separated from co-occurring phenolics by column chromatography using polyvinylpyrrolidone (PVP) with methanol as eluant. Subsequent fractionation of the cytokinins can then be achieved by HPLC on a C₁₈ODS reversed phase system using methanol: water (60: 40) as the mobile phase. The system shows considerable promise as an extremely mild separation process and has been used to separate two unknown cytokinins from seedlings ofHordeum vulgare cv. Steptoe.

Inhibition by amino acids of cytokinin-stimulated betacyanin synthesis inAmaranthus caudatus

J. Challice

Biologia plantarum 1984, 26:405 | DOI: 10.1007/BF02909587

A number of amino acids have been tested for their ability to inhibit the cytokinininduced synthesis of betacyanin inAmaranthus caudatus cotyledons. Under the conditions employed there was not any serious inhibition of pigment synthesis at amino acid concentrations belowca. 20 μg ml^-1. Amino acids such as methionine, γ-aminobutyric acid and leucine did not give rise to serious inhibition belowca. 200 μg ml^-1. At amino acid concentrations ofca. 2000 μg ml^-1, inhibitions of pigment synthesis was in all instances complete.

Carotenoids fromCapsicum annuum fruits: Changes during ripening and storage

M. E. Candela, M. Lopez, F. Sabater

Biologia plantarum 1984, 26:410 | DOI: 10.1007/BF02909589

Contents of individual carotenoids in the fruits of Ramillete cultivar ofCapsicum annuum L. changed during ripening of recently harvested fruits or fruits stored 15 d in a dark and cool room. β-carotene and β-cryptoxanthin contents rose to a maximum and then declined, while the contents of other earotenoids rose to a rather steady level. Capsanthin was the main carotenoid which together with capsorubin were responsihle for the ripening colour.

The effect of phenolic compounds on the activity of respiratory chain enzymes and on respiration and phosphorylation activities of potato tuber mitochondria

P. Makovec, L. Šindelář

Biologia plantarum 1984, 26:415 | DOI: 10.1007/BF02909590

The effect of derivatives of benzoic and cinnamic acids, quereetin,p-benzoquinone, and 2,5-dimethylbenzoquinone on oxygen consumption mitoehondrial suspensions and on the activity of some respiratory chain enzymes was studied. Benzoquinone and 2,5-dimethylbenzoquinone highly significantly inhibited the respiration and phosphorylation rates and malate- and succinate dehydrogenase activities. Chlorogenic acid, similarly as the quinones, very significantly inhibited the activities of the studied dehydrogenases but did not affect cytochrome oxidase. Oxygen consumption by intact mitochondria was not inhibited, only the oxidativo phosphorylation was...

Gradients of certain elements in segments of maize leaves of different age

M. R. Sarić, B. Krtić, B. Jocić

Biologia plantarum 1984, 26:423-432 | DOI: 10.1007/BF02909591

At pollination of maize plants, the old leaves, those of medium age, and young leaves, cut into segments transversally (10 segments) and longitudinally (8 segments and main vein), were sampled and concentrations of N, P, K, Ca, and Mg were determined. Then concentration gradients of these elements in maize leaves of different age were evaluated. The results obtained show that concentration gradient of N was the most evident in transversal segments of leaves of different ages, in particular in young leaves, that of K in the old leaves, and the Ca concentration gradient in leaves of medium age. The phosphorus concentration gradient was weakly expressed...

The integration of growth activity in vegetatively propagated poplar during the establishment year

Mária Luxová

Biologia plantarum 1984, 26:433-440 | DOI: 10.1007/BF02909593

On rooting the poplar stem cutting, the growth processes are coordinated so as to ensure optimum development of the new, vegetatively acquired individual. At first, adventitious roots develop on the cutting from latent root primordia. A part of them is short-lived, but in the meantime other, the so-called wound adventitious roots initiate from the callus on the lower cut surface of the cutting, which complement the permanent root system. In this way, conditions are prepared for a rapid growth and development of the stem, which forms from the upper bud on the cutting. The action of apical meristems providing the elongation of the stem and root, is followed...

Dark transpiration rate and water deficit as growth limiting factors in alfalfa plants

F. Plhák

Biologia plantarum 1984, 26:441 | DOI: 10.1007/BF02909594

Growth, dark transpiration rate (DTR) as well as water saturation deficit (WSD) of 30 single plants of 8 alfalfa genotypes growing in experimental field of 50 × 10 cm spacing, in four cuts at early bud stage, were studied. The growth and WSD of genotypes examined were significantly different, the differences in DTR were not significant. The growth of alfalfa plants was in negative correlation with both DTR which reflects non-effective water loss and WSD. Significant negative correlation established between plant growth and its variability shows that fodder productivity in alfalfa genotypes was dependent on growth variability of individual plants. Positive...

Effects of vanadium and tungsten on the nitrogen-fixing cyanobacterium Nostoc linckia

D. K. Mishea, H. D. Kumar

Biologia plantarum 1984, 26:448 | DOI: 10.1007/BF02909596

The effects of vanadium and tungsten on growth of the heterocystous cyanobacteriumNostoc linckia (Roth.) Born. and the activity of its nitrogenase and nitrate reductase were studied. While vanadate stimulated the growth of molybdate-limited cells and also their acetylene-reducing ability, it did not stimulate nitrate reductase activity. Tungstate inhibited growth in molybdate-limited cells and also their acetylene reducing and nitrate reductase activities. Acetylene reduction response of cells grown in a tungstate-containing medium indicated certain difference between the modes of action of vanadium and molybdenum. Tungstate caused a slight...

Effects of salicylate on stomatal resistance in detached tobacco leaves

S. Pennazio, P. Roggero

Biologia plantarum 1984, 26:455 | DOI: 10.1007/BF02909598

Salicylate administered to detached tobacco (Nicotiana tabacum L.) leaves kept in the light rapidly induced an increase in stomatal resistance. This effect was not the result of water stress. Both the concentration of salicylate and the duration of the application to leaves affected the extent of the stomatal response. Application of salicylate for short periods showed that, once the stomatal response started, it was maintained for long period of time in the absence of further supply. K⁺ or Ca²⁺ were able to lower the stomatal resistance induced by salicylate, but only when both the ions were administered together with...

Maintenance and growth components of dark respiration rate in leaves of C₃ and C₄ plants as affected by leaf temperature

M. Kaše, J. Čatský

Biologia plantarum 1984, 26:461-470 | DOI: 10.1007/BF02909600

The rates of maintenance and growth components of leaf dark respiration of a C₃ plant (Phaseolus vulgaris L.) and C₄ plant (Zea mays L.) as affected by temperature were studied using the McCree concept. Respiration rates were measured by means of infrared gas analysis in a closed gas exchange system. In both C₃ and C₄ species R_D and R_m increased with temperature in the temperature range (15-62 °C) studied. R_G depended on temperature with an optimum near the temperature optimum of gross photosynthetic rate, P_g. Significant correlation between R_D...

Fortschritte der Botanik. Morphologie. physioloche. Genetik. Systematik. Geobotanik

Ingrid Tichá

Biologia plantarum 1984, 26:404 | DOI: 10.1007/BF02909586

Water in plants bibliography

H. Göring

Biologia plantarum 1984, 26:409 | DOI: 10.1007/BF02909588

IARC Monographs on the evaluation of the carcinogenic risk of chemicals to humans. Volume 31. Some food additives, feed additives and naturally occurring substances.

J. Bříza

Biologia plantarum 1984, 26:432 | DOI: 10.1007/BF02909592

Fortschritte der Botanik. Morphologie. Physiologie. Genetik. Systematik. Geobotanik

Ingrid Tichá

Biologia plantarum 1984, 26:447 | DOI: 10.1007/BF02909595

Genetic aspects of plant nutrition, (Developments in Plant and Soil Sciences

Ingrid Tichá

Biologia plantarum 1984, 26:454 | DOI: 10.1007/BF02909597

Inorganic plant nutrition. Encyclopedia of Plant Physiology, New Series

Ivana Macháčková

Biologia plantarum 1984, 26:460 | DOI: 10.1007/BF02909599

RNDr. Bohdan Slavik, DrSc., * October 30, 1924

Biologia plantarum 1984, 26:479 | DOI: 10.1007/BF02909603