Book review

Danuše Hodáňová

Biologia plantarum 24:12, 1982 | DOI: 10.1007/BF02898475

Book review

J. Zima

Biologia plantarum 24:27, 1982 | DOI: 10.1007/BF02898478

Book review

T. Gichner

Biologia plantarum 24:33, 1982 | DOI: 10.1007/BF02898480

Book review

M. Kamínek

Biologia plantarum 24:52, 1982 | DOI: 10.1007/BF02898484

Book review

B. Vinš

Biologia plantarum 24:71, 1982 | DOI: 10.1007/BF02898488

Book review

B. Vinš, Danuše Hodáňová, M. Kamínek

Biologia plantarum 24:79-80, 1982 | DOI: 10.1007/BF02898490

Effect of polyphenols on shoot and root growth and on seed germination

D. J. Stoms

Biologia plantarum 24:1, 1982 | DOI: 10.1007/BF02898473

The effect of high concentrations of the simplest polyphenols on extension growth of maize (Zea mays L.) shoot ooleoptile segments, lettuce (Lactuca sativa L.) roots, and on radish (Raphanus sativus L.) seed germination, was studied. Quinone formation in the process of plant incubation in polyphenol solutions was proved. The data obtained are presumably explained by the important part that is played by the quinoid products of phenol oxidation in the ability ofo- andp-biatomic phenols to inhibit growth.

Responses of two differentially sensitiveCicer arietinum L. cultivars to water stress: Protein content and drought resistance

G. Singh, V. K. Rai

Biologia plantarum 24:7, 1982 | DOI: 10.1007/BF02898474

Two cultivars ofCicer arietinum L. with contrasting sensitivities to water stress, cv. C 214 (relatively resistant) and cv. 130 (susceptible) were compared for their protein content and soluble nitrogen (sol-N) under water stress. During water stress shoots of the cv. C 214 showed an increase (over the control) in both protein and sol-N content. The total nitrogen (total-N) also increased in the cv. C 214 while remaining almost unaffected in the cv. G 130. Cultivar C 214 shoots recorded lower protein/sol-N ratios. The results have been discussed in relation to resistance to water stress.

Biotypic differences in the karyology ofPennisetum pedicellatum Trin

A. K. Chatterji, N. Sahu

Biologia plantarum 24:13-19, 1982 | DOI: 10.1007/BF02898476

Detailed karyological analyses have been made of the five biotypes ofPennisetum pedicellatum Trin. These biotypes not only differ in some morphological traits but also in their chromosomal characteristics. Biotype-B with 2n = 48 chromosomes shows constancy, while in the other four 2n = 36 and 64 are found to be "floating". Other numerical variations include 2n = 42 and 18 chromosomes. Minute karyological differences are not only noted amongst the biotypes, but also there are variations in the complements within a biotype. Such variations are presumed to be buffered through the apomictic mode of reproduction. From the morphological and cytological...

Der Einfluss von CCC auf die Entwicklung des Roggenhalmes

Svetlana Koshuchowa, H. W. Müller, K. Adolf, H. Münnich, H. Göring

Biologia plantarum 24:20, 1982 | DOI: 10.1007/BF02898477

Field trials on the effect of chlorocholinechloride (CCC) on rye plants of the cultivar Danae and of a selected population "WRS" proved that rye principally shows as reaction analogous to wheat. The CCC-induced decrease of stalk length is due to the reduction of elongation growth of the 4th internode. This shortening effect is mainly the result of decreased cell extension and, in the middle internode, additionally of inhibited cell division in longitudinal direction. The shape of internodes is changed under the influence of CCC. Walls of parenchyma cells of CCC-treated plants are thinner and those of sclerenchyma cells are thicker compared with cell...

Germination and some metabolic characteristics in green gram seedlings as affected by sodium carbonate and bicarbonate

B. K. Garg, O. P. Garg

Biologia plantarum 24:28-33, 1982 | DOI: 10.1007/BF02898479

Effects of Na₂CO₃ and NaHCO₃ at equal conductivities (2, 4 and 6 S cm^-1) on germination, seedling growth and some metabolites were studied in two cultivars of green gram (Phaseolus aureus Roxb. cv. Varsha and cv. Pusa Baiskhi) in Petri dishes and sand culture. With increasing conductivity both the salts depressed germination, length of shoot and root and their mass. NaHCO₃ was more depressiv than Na₂CO₃. The contents of chlorophyll, RNA, protein and free amino acids were higher and affected to a lesser extent under salt stress in leaves of cv. Varsha than cv. Pusa Baiskhi....

Effects of toxic concentrations of natrium fluoride on growth and enzyme activities of rice (Oryza sativa L.) and jute (Corchorus olitorius L.) seedlings

R. K. Sarkar, A. Banerjee, S. Mukherji

Biologia plantarum 24:34, 1982 | DOI: 10.1007/BF02898481

Germination was increasingly inhibited at concentrations above 5 and 20 mM and stopped altogether at 80 and 50 mM NaF in rice and jute respectively, whereas the inhibition of seedling growth began at much lower concentrations. Of the enzymes, RNase activity was increased by fluoride, while α-amylase, protease, phytase and ATPase activities exhibited distinct inhibition from the control.

Partial purification and characterization of bapa-ase fromVigna unguiculata (L.) walp

Iracema L. Ainouz, Norma M. B. Benevides

Biologia plantarum 24:39, 1982 | DOI: 10.1007/BF02898482

α-N-Benzoyl-DL-arginine-p-nitroanilide (BAPA) hydrolytic enzyme was partially purified from cotyledons of mature dry seeds ofVigna unguiculata (L.) Walp, cv. Seridó. Extracts of a finely ground meal ofVigna seeds were obtained with 0.02 M phosphate buffer (KH₂PO₄/ /Na₂HPO₄) pH 7.6. A protein fraction was obtained from the extracts by ammonium sulfate precipitation (25 to 50% saturation). This protein fraction was subjected to chromatography on DEAE-cellulose. A separated fraction of the cellulose column presented one main component and two minor bands as seen on polyacrylamide gels....

Juvenility and endogenous rooting substances inCastanea sativa Mill

Adelina Vazquez, Dolores V. Gesto

Biologia plantarum 24:48-52, 1982 | DOI: 10.1007/BF02898483

The rooting response to exogenous auxin of cuttings in a juvenile phase of growth from plants ofCastanea sativa Mill. was determined and simultaneously the rooting potential of the water extracts was evaluated in presence of IAA by a bean rooting test. The level of the extractable rooting promoters was high in the cuttings which exhibited the highest percentage of rooting. An inhibition of the effect of IAA on rooting was detected in the cuttings which showed the lowest rooting response, the histogram differing not much from that of the adult plant. The results indicate that in chestnut the juvenile condition, easy rooting, is associated with...

Translocation of¹⁴C-abscisic acid from roots into the aboveground part of pea (pisum sativum L.) seedlings

S. Procházka

Biologia plantarum 24:53-56, 1982 | DOI: 10.1007/BF02898485

The translocation of¹⁴C-ABA from roots into other parts of the plant was followed in intact and decapitated pea seedlings. In intact plants ABA from roots was translocated above all into the apical part of epicotyl. In decapitated plants the regulative ability of intact apex can be partly simulated by exogenous IAA. The growth of lateral buds occurring after decapitation was associated with an intensive flow of¹⁴C-ABA from roots into released lateral buds as late as 72 h after decapitation,i.e. in the stage of intensive elongation growth of buds.

Ribulose-1, 5-bisphosphate carboxylase activity, chlorophyll and protein concentrations in differentPopulus clones

R. Ceulemans, F. Van Assche, I. Impens, H. Clusters

Biologia plantarum 24:57, 1982 | DOI: 10.1007/BF02898486

Ribulose-1,5-bisphosphate carboxylase activity (RuBPC), chlorophyll (chl) and protein (prot) concentrations and chlorophyll/protein (chl/prot) ratios were determined in five differentPopulus clones together with their maximal net CO₂ uptake rates (P_max). A classic reference clone (Populus ×euramericana "Robusta" (Dode) Guinier) was compared with four recently selected euramerican and interamerican crossings. Chl/prot ratio and RuBPC activity varied among the different clones, while chl a/chlb ratio showed only a very low coefficient of variation (1.7%) for the five clones. Poplar clone "Robusta" could...

The inhibition and stimulation of DNA synthesis in shoot apices ofChenopodium rubrum L. during photoperiodic induction of flowering

Jana Opatrná, B. Hořavka, J. Ullmann, J. Krekule

Biologia plantarum 24:63, 1982 | DOI: 10.1007/BF02898487

Three short-day inductive cycles bring about inhibition followed by transitional enhancement of growth, not only in roots and leaves but also in different zones of shoot apical meristem, as shown by measurement of DNA synthesis using³H-thymidine autoradiography. The first inductive cycle resulted in marked inhibition of the cells of the central zone (CZ), rib meristem (RM), and peripheral zone (PZ). Subsequent enhancement of DNA synthesis occurs in RM during the second inductive cycle, but in CZ only in the third cycle. The growth activation in PZ is counteracted by decrease in apical dominance which results in further inhibition of leaf...

Kinetics of uridine uptake and incorporation into RNA in tobacco pollen culture

J. Süss, J. Tupý

Biologia plantarum 24:72, 1982 | DOI: 10.1007/BF02898489

The capacity of pollen tubes to utilize exogenous uridine during 8 h of cultivation in shaken suspension in a sugar-mineral medium was examined by continuous and pulse labelling with³H-uridine. The increase of uptake with increasing concentration of the nucleoside indicated a saturable transport system with an approximate K_m of 9.4 × 10^-6 M and 12.5 × 10^-6M as determined in 1-h and 6-h cultures, respectively. Maximal uptake took place at the beginning of germination reaching a rate of about 2 nmol h^-1 per 1 mg of dry pollen at 0.1 mM external uridine. The uptake activity decreased with the time...