Book reviews

T. Gichner, J. VelemíNský

Biologia plantarum 1988, 30:91 | DOI: 10.1007/BF02878473

Book review

Jarmila Solárová

Biologia plantarum 1988, 30:110 | DOI: 10.1007/BF02878477

Book review

P. Cruiziat

Biologia plantarum 1988, 30:119 | DOI: 10.1007/BF02878479

Book review

Jarmila Solárová

Biologia plantarum 1988, 30:123 | DOI: 10.1007/BF02878481

Book Review

Jarmila Solárová

Biologia plantarum 1988, 30:151 | DOI: 10.1007/BF02878487

Book reviews

Ingrid Tichá, I. Šetlík, Jarmila Solárová, Jana Pospíšilová

Biologia plantarum 1988, 30:154-160 | DOI: 10.1007/BF02878489

Macromolecular syntheses and the course of cell cycle events in the chlorococcal algaScenedesmus quadricauda under nutrient starvation: Effect of nitrogen starvation

G. Ballin, J. Doucha, V. Zachleder, I. Šetlík

Biologia plantarum 1988, 30:81-91 | DOI: 10.1007/BF02878472

Daughter cells of the chlorococcal algaScenedesmus quadricauda incubated under photosynthesizing conditions in a nitrogen-free medium did not make any progress in the cell cycle. Photosynthetic starch formation continued for a period corresponding to a half of the cell cycle and then levelled off. Protein synthesis was very slow and it did not surpass double the initial amount. RNA content decayed from the start of treatment and approached about 2 pg/cell.
When a synchronous population was deprived of nitrogen or of light in the middle of the cell cycle RNA synthesis stopped immediately or very soon afterwards and, in spite ofabundant intracellular...

Macromolecular syntheses and the course of cell cycle events in the chlorococcal algaScenedesmus quadricauda under nutrient starvation: Effect of phosphorus starvation

V. Zachleder, G. Ballin, J. Doucha, I. ŠetlíK

Biologia plantarum 1988, 30:92-99 | DOI: 10.1007/BF02878474

Daughter cells of the chlorococcal algaScenedesmus quadricauda incubated under photosynthesizing conditions in a phosphate-free medium accomplished one cell cycle but divided into a lower number of daughter cells compared to the control. RNA synthesis was restricted early in the cell cycle while protein synthesis was retarded as compared to the control only at the end of the cycle. The number of DNA replication rounds (and consequently the number of divisions) was reduced in proportion to the lower content of RNA per cell.
Daughter cells produced by phosphorus-starved mother cells and grown further in a phosphorus free medium performed no...

Cytological characteristic of two strains of grapevine (Vitis riparia × Vitis labrusca) callus culture

J. Jásik

Biologia plantarum 1988, 30:100-103 | DOI: 10.1007/BF02878475

The structure of the cells was studied in two strains of grapevine calli (Vitis riparia ×V. labrusca). These callus cultures contained only highly vacuolised cells. The pattern of division in these slightly cytosolic cells was described. In both callus strains caryological instability has been found.

Effect of indol-3-ylbutyric acid, kinetin and gibberellic acid on alkaloid content inNicotiana rustica stem cuttings

J. A. Creus, J. Barcelo

Biologia plantarum 1988, 30:104-110 | DOI: 10.1007/BF02878476

The effect of the growth substances indol-3-ylbutyric acid (IBA), kinetin (Kn) and gibberellic acid (GA3) on the alkaloid content and recovery from the stress induced by removal of roots inNicotiana rustica L. plants have been studied. All treatments, mainly GA₃, overcome the stress more effectively than the controls. The alkaloid content was increased 2.5fold with GA₃. Treatment with Kn also increased the alkaloid content, but only in the absence of roots. In contrast, treatment with IBA slightly reduced the alkaloid content. The results of this investigation indicated that a degradation of stored alkaloids did not occur...

Effect of GA₃ and BAP on respiration, phosphate uptake and metabolism in foliar discs of Pelargonium zonale after ageing

J. Beraud, M. Penot

Biologia plantarum 1988, 30:111 | DOI: 10.1007/BF02878478

Respiration rate of foliarPelargonium discs was insensitive to ageing. The addition of BAP or GA₃ to the ageing medium did not produce any effect.
The presence of GA₃ or BAP in the ageing medium induced an increase (27 %) or a decrease (45 %) of the phosphate uptake. The analysis of phosphorylated compound labelling showed that these two hormones decreased³²P incorporation in the non-acid soluble fraction and increased³²P incorporation in the acid soluble organic fraction. GA₃ and BAP had little effect on the distribution of radioactivity between the different acid soluble compounds,...

Comparative investigations on the metabolic fate of a GA₃ amino acid conjugate with those of glucosides and derivatives of GA₃

H. W. Liebisch, Jutta Beneš, I. Beneš

Biologia plantarum 1988, 30:120-123 | DOI: 10.1007/BF02878480

Three different radioactively 1 abelled conjugates and four derivatives of GA₃ were compared with regard to the uptake and metabolism in isolated cells ofLycopersicon esculentum L. The generally low and heavily varying rates of uptake did not correlate with the partition coefficients of the individual compounds in the system.
N-GA₃-oyl-[2-¹⁴C]-glyeine was not hydrolyzed at all in tomato cell cultures whilst GA₃ glucosyl ester and GA₃-3-O-glueoside showed partial cleavage to GA₃. The stability of the amide linkage in N-GA₃-oyl-glycine was further established in...

Proton extrusion by leaf discs ofVicia faba L.: light- and ion-stimulated H(su+) release†

U. Petzold, I. Dahse

Biologia plantarum 1988, 30:124-130 | DOI: 10.1007/BF02878482

Previous electrophysiological and tracer kinetic studies indicated that the uptake of neutral amino acids took place by means of the proton cotransport mechanism in the leaf tissue of broad bean plants. The present investigations were designed to characterize the origin of the driving force for this process, and the proton pumping activity of leaf cells ofVicia. This activity is known to be revealed when peeled broad been leaf discs, floated on a bathing solution in the light or in darkness acidify the medium.
White light caused the strongest acidification. The presence of K⁺ and Na⁺ in the external solution increased...

Influence of light quality on the ribosomal RNA levels inWolffia arrhiza: Comparison of phosphate and magnesium limited chemostat populations

M. Eichhorn, H. Augsten

Biologia plantarum 1988, 30:131-135 | DOI: 10.1007/BF02878483

Wolffia arrhiza (L.) Wimm. was grown axenically in the chemostat under white luminescent light (photon fluence rate 23 ujnol m^-2 s^-1) and phosphate or magnesium limitation (0.075 and 0.01 jxmol 1^-1, respectively). Aliquots (1 g fresh mass) were taken from the continuous cultures and were irradiated for 1 h with either white light (control) or monochromatic blue (453 nm) or red (654 nm) light. The amount of [5^-3H]-uridine incorporated into cytosolic and chloroplastic rRNAs during these exposures was estimated and following results were obtained: In phosphate limited plants rod light considerably reduced...

The effect of Nitrogen on the size of spring barley root system as determined by means of its electric capacity

R. Richter

Biologia plantarum 1988, 30:136-141 | DOI: 10.1007/BF02878484

The size of the spring barley root system was studied on the basis of its electric capacity in plants grown in nutrient solutions either lacking or containing nitrogen in the form of nitrate or ammonium.
Root electric capacity changed in dependence on nutrition from Day 12 after emergence, when F values increased in the root systems of plants exposed to nitrate and ammonium salts. In plants grown in H₂O, the values of electric capacity statistically significantly decreased on Days 15 to 17, in plants grown in PK solution lacking nitrogen on Day 20.
Root electric capacity of plants grown in full nutrient solution gradually increased...

Size and compositional heterogeneity of seeds in the winged bean pod (Psophocarpus tetragonolobus (L.)DC)

T. Kamala Devi, K. Sree Kumar

Biologia plantarum 1988, 30:142 | DOI: 10.1007/BF02878485

Differently positioned seeds in the mature pod of winged bean (Psophocarpus tetragonolobus (L.) DC) differ in mass and content of total protein and phosphorus and starch.

The effect of potassium on germinating wheat embryos at different viability levels

L. Petruzzelli

Biologia plantarum 1988, 30:147-151 | DOI: 10.1007/BF02878486

The effect of potassium administration in early germination of wheat (Triticum durum L., cv. Appulo) was studied by incubating isolated embryos at different viability levels with 1 mM KC1. The stimulation of germination and growth in aged embryos by K⁺ was accompanied by a significant increase in (³H) leucine incorporation into protein and in phospholipid synthesis as evidenced by TLC analysis of embryo phospholipids extracted after 24 h of imbibition. The metabolic improvement mediated by the cation would in turn repair aging damage occurring at subcellular sites including membranes.

Meiotic studies of wheat, rye and 42-chromoaome-Triticales

N. K. Chaubey, V. K. Khanna

Biologia plantarum 1988, 30:152-154 | DOI: 10.1007/BF02878488

In 42-chromosome - triticales, chromosome pairing was extremely erratic with very low frequency (60-63 %) of regular bivalents per pollen mother cell. The frequency of univalents was very low or nil in the wheat and rye parents.