Book review

Ingrid Tichá

Biologia plantarum 30:178, 1988 | DOI: 10.1007/BF02878752

Book review

Frideta Seidlová

Biologia plantarum 30:192, 1988 | DOI: 10.1007/BF02878755

Book review

J. Krekule

Biologia plantarum 30:198, 1988 | DOI: 10.1007/BF02878757

Book review

P. Bartoš

Biologia plantarum 30:203, 1988 | DOI: 10.1007/BF02878759

Book review

C. Záruba

Biologia plantarum 30:218, 1988 | DOI: 10.1007/BF02878762

Book review

A. Honěk

Biologia plantarum 30:230, 1988 | DOI: 10.1007/BF02878765

Book review

M. Marek

Biologia plantarum 30:236, 1988 | DOI: 10.1007/BF02878768

Book review

J. Velemínský, I. Babůrek, V. Žárský

Biologia plantarum 30:239-240, 1988 | DOI: 10.1007/BF02878770

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

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

Biologia plantarum 30:161-169, 1988 | DOI: 10.1007/BF02878750

Daughter cells of the chlorococcal algaScenedesmus quadricauda were incubated under photosynthesizing conditions in a sulphur-free medium. The course of the cell cycle under these conditions was changed in daughter cells which differed in their stage of development. In absence of sulphur, advanced daughter cells with two nuclei and 2 or 4 genomes passed a cycle identical with that of control in sulphur containing medium. Each cell yielded eight binuclear daughter cells. With less advanced daughter cells (one nucleus and 1 or 2 genomes) restriction of RNA synthesis occurred near to the end of the cell cycle and protein synthesis ceased two hours...

Influence of KCl pretreatments and Ca/Na ratios of nutritive solution upon growth of tomato vitroplants in NaCl medium

G. Guerrier, P. Bourgeais

Biologia plantarum 30:170-178, 1988 | DOI: 10.1007/BF02878751

The 18-day-old tomato vitroplants were obtained in axenic conditions by culture of expiants (including the terminal bud and the last internode of the stem) on agar-agar nutritive medium with 0 or 75 mM NaCl. The growth and the mineral content of the vitroplants were compared when the expiants were grown on media either with low or high K/Na and Ca/Na ratios, or with low K/Na and Ca/Na ratios after pretreatments of expiants by KC1, NaCl or CaCl₂ (from 0 to - 4.5 bar). The KCl pretreatment (-1.1 bar) during one day brings about an increase in vitroplant growth greater than that produced by a high Ca/Na ratio medium. The Cl accumulation was...

Some factors affecting root formation onin vitro regenerated pea shoots

Marie Kubaláková, Eva Tejklová, M. Griga

Biologia plantarum 30:179-184, 1988 | DOI: 10.1007/BF02878753

The rooting ability of 2 cm long shoots ofPisum sativum L., derived from differentin vitro shoot-tip cultures in two pea cultivars Bohatýr and Kleine Rheinländerin was evaluated. In three mutually independent experiments the full and half-strength Murashige-Skoog medium (containing full or half concentration of macro and microelements), with sucrose concentrations 10-30 g l-¹, and with various NAA and IAA combinations, was tested. The variant with half concentration of macro- and microelements, supplemented with 30 g l¹ sucrose, and with growth regulators in the quantity of 1 μM proved optimum.

Changes in the content of phenolic substances during the growth ofNicotiana tabacum cell suspension culture

Milena Cvikrová, Marie Hrubcová, L. Meravý, F. Pospíšil

Biologia plantarum 30:185-192, 1988 | DOI: 10.1007/BF02878754

The dynamics of changes in the content of four groups of phenolic substances was investigated during the growth cycle of the cell suspension culture ofNicotiana tábacum by means of fractionation. The relative contents of free phenolic acids, their esters, phenolic glycosides, and phenole acids non-extractable with methanol changed in dependence on the growth phase of the culture. A sharp increase, especially in the content of ester- and glycoside-bound phenolics and to a lesser extent also of phenolics belonging to the other two groups, occurred at the end of the lag phase. Then, after a temporary decrease at the early linear phase, the level...

Stimulation of ethylene production in asparagus bean leaves by cupric ion

S. Pennazio, P. Roggero

Biologia plantarum 30:193-198, 1988 | DOI: 10.1007/BF02878756

Asparagus bean (Vigna sesquipedalis Fruhw.) cuttings responded to Cu²⁺ treatments by a rapid and marked increase in ethylene production. This response showed a transient nature but was only partially reversed by returning cuttings to water after prolonged Cu²⁺ treatments suggesting that relative stable links between Cu²⁺ and the ethylene forming system may occur. Cu²⁺ treatments did not induce any visible necrosis nor affect ethane release from cuttings. The Cu²⁺-stimulated ethylene production was not attributable to a light-driven peroxidation of membrane lipids, because it was not affected...

Protein composition of cotyledons and aleurone grains inLupinus luteus L. Seeds during Germination

Ligia Konopska-Waliszkiewicz

Biologia plantarum 30:199, 1988 | DOI: 10.1007/BF02878758

The change in protein composition of whole cotyledons and cotyledon aleurone grains ofLupinus luteus L. during seed germination was studied. SDS-polyacrylamide gel electro-phoresis showed a clear change in composition of cotyledon proteins as well as in composition of the aleurone grains during 5 days of seed germination. At this time, both in whole cotyledons as well as in aleurone grains, two subunits of β-conglutin with mol. m. 53 000 and 39 000 were rapidly hydrolyzed. After 5 days of germination traces of α-conglutin subunits could be detected in the cotyledons, whereas in aleurone grains this globulin fraction disappeared. In...

Effects of abscisic acid on rooting stem cuttings of sweet potato in open top chambers under enriched CO₂ environment

N. C. Bhattacharya, P. P. Ghosh, Sheila Bhattacharya, D. R Hileman, P. K. Biswas

Biologia plantarum 30:204-209, 1988 | DOI: 10.1007/BF02878760

Ten centimeter long stem cuttings of sweet potato (Ipomoea batatas L. cv. Georgia Jet) with intact apex and leaves were cultured in distilled water as well as in varying concentrations of abscisic acid (ABA) in open top chambers at 364, 438 and 666 cm³ m{-3}CO₂. Low concentration of ABA promoted rooting and elongation of roots at 364 cm₃ m{-3} CO₂ while rooting was suppressed at enriched levels of CO₂. However, biomass production in shoots and roots was higher in 666 than in 364 cm³ m^-3 CO₂.

Delimitation of physiological regions in yam tubers (Dioscorea sp.) and distribution pattern of saccharide degrading enzymes, cell sap pH and protein in these regions

U. Oluoha

Biologia plantarum 30:210-218, 1988 | DOI: 10.1007/BF02878761

Physiological regions of yam tubers were morphologically defined in different specie into 'Head', 'Middle' and 'Tail', while the limits of these regions were studied using phosphorylase activity. Variation in enzyme activity, pH and protein concentration was found in different regions of the tubers. Old yam tubers had significantly higher activities of saccharide degrading enzymes, hexokinase, phosphorylase, glucose-6-phosphate dehydrogenase, phosphofructokinase and pyruvate kinase, than the new tubers. However, activity of phosphofructokinase in newD. rotundata was higher than that of old tuber. The high activity of phosphorylase in different...

Composition of the walls of stem and leaves of vitrifying carnation

C. Kevers, R. Goldberg, J. Chu-Ba, Th. Gaspar

Biologia plantarum 30:219-223, 1988 | DOI: 10.1007/BF02878763

Vitrification of stem explants of carnation was brought about by culturing in liquid medium. Cellulose and lignin levels were decreased in vitrified stems and leaves. Isolated cell walls of vitrified tissues were also characterized by low calcium content, low Ca²⁺/uronic acids ratio, low ratio of uronic acids to neutral sugars due to higher amounts of the latters. All these characteristics may account for the high wall plastic potential previously measured in vitrifying internodes.

Comparative analysis of growth and movements of the aboveground parts in some deciduous woody species

Radmila ČíŽková

Biologia plantarum 30:224-230, 1988 | DOI: 10.1007/BF02878764

Vertical projections of nutation movements in the epicotyls of sessile oak, Turkey oak, horse chestnut and hypocotyls of European beech were recorded by means of photography and time-lapse cinematography at the early stages of their ontogeny. Attention was paid to the kinetics of growth rate, diameter of the lower part of the elongating zone, and the form, amplitude and frequency of nutation turns. At the beginning of ontogeny the vertical projection of the movements of all woody species under study was represented by irregular curves, followed by elliptical trajectories, particularly when reaching the maximum growth rate. The highest average growth...

Plant water relations as selection criteria for drought tolerance in mustard

R. P. Singh, D. P. Singh

Biologia plantarum 30:231-233, 1988 | DOI: 10.1007/BF02878766

Genotypes of mustard (B. juncea) were evaluated for concurrent changes in leaf water potential (Ψ), leaf osmotic potential (π), leaf turgor potential (P) and leaf relative water content (RWC) during moisture stress at reproductive stage of growth. The slope 'b' in the regression between Ψ and π varied from 0.43 to 0.97 and was positively correlated with P and RWC. The genotypes with 'b' around 0.7 were able to maintain P of about 0.5 MPa at Ψ of - 2.5 MPa and thus such value of 'b' seems to provide enough degree of tolerance against drought.

Detection of Ri T-DNA in transformed oilseed rape regenerated from hairy roots

M. Hrouda, Jana Dusbábková, J. Nečásek

Biologia plantarum 30:234-236, 1988 | DOI: 10.1007/BF02878767

A fertile plant with altered phenotype of oilseed rape (Brassica napus) spring cultivar HM-81 was regenerated from hairy root tumors incited by Agrobacterium rhizogenes 15834. Southern blot hybridization analysis revealed several copies of T_l and T_r-DNA of Ri plasmid.

Differential stomatal closure by abscisic acid in epidermal strips of green and pigmented leaves or leaf parts

S. S. Sharma, V. K. Rai

Biologia plantarum 30:237-239, 1988 | DOI: 10.1007/BF02878769

Response of stomata in epidermal strips from green leaves ofTradescantia sillamontana and anthocyanin-rich purple leaves ofT. virginiana and from green and pigmented regions ofPedilanthus tithymaloides leaves, to ABA have been compared. Stomata from anthocyanin-rich leaves or leaf parts appeared to be relatively insensitive to ABA as compared to those from green leaves or leaf parts. Observations indicate the possibility of the involvement of endogenous anthocyanins in antagonising ABA in preventing the stomatal opening.

The International Congress on Natural Products Research

Biologia plantarum 30:240, 1988 | DOI: 10.1007/BF02878771