abstract：:The purpose of these studies was to find which steps in the biosynthetic pathway of carotenoids in Fusarium are under photoregulation. After separation by column chromatography ζ-carotene, neurosporene, γ-carotene, torulene, neurosporaxanthin and lycopene were identified from their absorption spectra in visible light ...

journal_title：Planta

authors： Bindl E,Lang W,Rau W

更新日期：1970-06-01 00:00:00

abstract：:Ascorbic acid accumulation in the mustard seedling is controlled by P fr(active phytochrome). Kinetic studies demonstrate that P frexerts a rapid and fully reversible control over the steady state rate of ascorbic acid accumulation. Following the terminology of Weisz (1967) for this type of metabolic control the term ...

journal_title：Planta

authors： Bienger I,Schopfer P

更新日期：1970-06-01 00:00:00

abstract：:Pale and green leaves of Kalanchoe fedtschenkoi var. variegata were inoculated with Agrobacterium tumefaciens. Six weeks later the chlorophyll contents of the leaves and their tumors were investigated. The tumor tissues possess very similar concentrations of chlorophylls and a low number of chloroplasts per cell. Ther...

journal_title：Planta

authors： Beiderbeck R,Nitsche H

更新日期：1970-03-01 00:00:00

abstract：:1. Most carotenoids show a 3-peak-absorption curve in the visible spectral region in polar solutions. The addition of a definite quantity of H2O to such solutions (ethanol, methanol, aceton, isopropanol) changes the absorption curve of these pigments in a characteristic manner. A new peak appears in the uv region of t...

journal_title：Planta

authors： Hager A

更新日期：1970-03-01 00:00:00

abstract：:D-threo chloramphenicol (CAP) at 5×10(-5) M, given continuously during a 24-hr aging period and subsequent post-age treatment with 2,4-dichlorophenoxyacetic acid (2,4-D)±kinetin markedly depressed cell expansion in Jerusalem artichoke (Helianthus tuberosus) tuber slices. Both the rate and total amount of expansion wer...

journal_title：Planta

authors： Setterfield G

更新日期：1970-03-01 00:00:00

abstract：:The giant cells of the petiolar hairs of Heracleum mantegazzianum contain cytoplasmic fibres that are readily visible with phase contrast or interference contrast optics. These fibres are associated with saltatory particle movement and protoplasmic streaming in this cell and are believed to be the living image of simi...

journal_title：Planta

authors： O'Brien TP,McCully ME

更新日期：1970-03-01 00:00:00

abstract：:When plant storage tissue is cut into thin disks it rapidly develops a high capacity to absorb phosphate from dilute solutions. The recent trend has been to attribute the development of this ability to the increased metabolic activity of bacteria known to be containing the tissue. Data presented in this paper shows th...

journal_title：Planta

authors： Palmer JM

更新日期：1970-03-01 00:00:00

abstract：:1. The plastids of the saprophytic orchid Neottia nidus-avis contain, besides chlorophyll a, all plastidquinones and carotenoids of normal chloroplasts from higher plants. The relative concentrations of plastidquinones and carotenoids are, however, quite different from those in photosynthetically active plant tissue. ...

journal_title：Planta

authors： Reznik H,Lichtenthaler HK,Peveling E

更新日期：1969-12-01 00:00:00

abstract：:The effect of varying calcium concentration in the medium on the potassium flux into the exudate has been studied. In media of low ionic strength (o.1 mM KCl) the potassium flux, J K, was significantly increased by increasing the calcium concentration of the medium. But in higher ionic strength media (10 mM) KCl) ther...

journal_title：Planta

authors： Collins JC,Linstead PJ

更新日期：1969-12-01 00:00:00

abstract：:Phytochrome was found by direct spectrophotometry to be present in whole dry seeds of cucumber. This pigment is spectroscopically different from the pigment found in etiolated plants. It shows the phenomenon of inverse reversion; in darkness, the red-absorbing form (Pr) reverts slowly to the far-red-absorbing form (Pf...

journal_title：Planta

authors： Spruit CJ,Mancinelli AL

更新日期：1969-12-01 00:00:00

abstract：:The determination of the activities of the enzymes which could be involved in sucrose-starch conversion showed that the first step of this transfer is performed by the sucrose-synthetase. In this reaction UDPG and almost no ADPG is formed. However, under the given conditions the concentration of UDPG is low, and with ...

journal_title：Planta

authors： de Fekete MA

更新日期：1969-12-01 00:00:00

abstract：:The effect of glucose and the uncoupler Cl-CCP upon hydrogen production was studied in adapted cells of Scenedesmus obliquus D3. Cl-CCP at 10(-5)M concentration completely inhibited the evolution of H2 in the dark and increased the apparent rate of H2 evolution in the light. At 10(-5)M Cl-CCP, photosynthesis and photo...

journal_title：Planta

authors： Kaltwasser H,Stuart TS,Gaffron H

更新日期：1969-12-01 00:00:00

abstract：:It has been shown that the scuttellum of germinating barley embryos synthesises gibberellin in intact grains or when detached from the endosperm, but not when attached to the endosperm if the axis is removed. Evidence is given to support the hypothesis that the inhibition of gibberellin synthesis is caused by a distur...

journal_title：Planta

authors： Radley M

更新日期：1969-09-01 00:00:00

abstract：:Changes in the quantities of free and membrane-bound ribosomes were followed in the cotyledons of developing seeds. During the phase of storage protein synthesis, free and membrane bound ribosomes do not interchange, and as both classes synthesise protein in vivo, it is possible that they may synthesise different grou...

journal_title：Planta

authors： Payne PI,Bouter D

更新日期：1969-09-01 00:00:00

abstract：:Ten-cell-long filaments of the caulonema of Funaria hygrometrica were isolated and labeled with (3)H-thymidine. During the process of regeneration this precursor is incorporated into the nucleus and the chloroplasts. The nuclei of aged cells are preferentially labeled, even the nuclei of such cells which probably will...

journal_title：Planta

authors： Knoop B,Hahn H,Bopp M

更新日期：1969-09-01 00:00:00

abstract：:A comparison was made of the activity of carboxydismutase (ribulose-1,5-diphosphate carboxylase) between higher plant species which possess the β-carboxylation (C4-dicarboxylic acid) pathway for photosynthesis and species which lack this pathway. Contrary to earlier findings no marked difference in the level of this e...

journal_title：Planta

authors： Björkman O,Gauhl E

更新日期：1969-09-01 00:00:00

abstract：:Comparative investigations of 20 Centrospermae from 12 families revealed that a plastid with an electron-dense core and/or annular plastid filaments is typical for Caryophyllales.When the plastid membrane breaks down - it is most probable that this takes place artificially during the process of preparation and fixatio...

journal_title：Planta

authors： Behnke HD

更新日期：1969-09-01 00:00:00

abstract：:The inductive effect of short-day (SD) cycles on floral-bud initiation in Impatiens balsamina was enhanced and the minimum requirement for SD cycles for flowering reduced by intercalated long days (LDs). Thus, floral buds developed into flowers with only 4 SD cycles in plants receiving them individually or in pairs al...

journal_title：Planta

authors： Toky KL,Nanda KK

更新日期：1969-06-01 00:00:00

abstract：:An acidic (Fs) and a nearly neutral (Fn) protein fraction were extracted from the chromatin of calf thymus and pea seedlings. Both fractions are able to combine with protein-free DNA to form a complex, which, however, has a lower thermal stability than a DNA-histone complex. Fs and Fn inhibit root initiation in a simi...

journal_title：Planta

authors： Fellenberg G

更新日期：1969-06-01 00:00:00

abstract：:At high potassium concentrations it is possible to isolate largely intact polysomes from fertilized and unfertilized Fucus vesiculosus eggs, and to study the distribution pattern of ribosomal particles in a sucrose gradient. The changes in the ribosomal pattern before and after fertilization reflect the time course of...

journal_title：Planta

authors： Linskens HF

更新日期：1969-06-01 00:00:00

abstract：:Detached phyllodia ofBryophyllum tubiflorum were fed under illumination with(14)CO2 at different times during the light/dark period (12:12 hours). After photosynthesis in presence of(14)CO2 during the intrinsic dark period the greatest part of soluble radioactivity was found in malate. When the same experiment was rep...

journal_title：Planta

authors： Kluge M

更新日期：1969-06-01 00:00:00

abstract：:The time-response of the CO2-exchange of both leaf surfaces was measured separately. Leaves of Primula palinuri and Zea mays were used for the study. After short dark-periods (3 min) the stomata are not closed. Consequently CO2-uptake starts quickly after re-illumination and reaches the steady-state value very rapidly...

journal_title：Planta

authors： Bertsch A,Domes W

更新日期：1969-03-01 00:00:00

abstract：:A study has been made of plastids in the root meristem of Colchicum autumnale. These organelles contain simultaneously deposits of starch, lipid, and a crystalline material, probably protein. Two types of internal membrane are present within the plastid. One appears to be concerned with the transport of material acros...

journal_title：Planta

authors： Burgess J

更新日期：1969-03-01 00:00:00

abstract：:Kinetin induces an increase in the caffeine content of Coffea leaves of up to 40% of the normal level. The effect is most pronounced in young leaves; it is, however, transient. After six days in old leaves and after 12 days in young leaves, the caffeine content has decreased to its normal level.The results are discuss...

journal_title：Planta

authors： Wanner H,Hagemann P

更新日期：1969-03-01 00:00:00

abstract：:Sugar-beet plants, germinated in growth cabinets at 20°C and transplanted into the field after 3 weeks, developed much larger roots than plants grown from seed drilled directly into the soil. At the end of the season, the roots of transplants were 39% greater than from drilled seed-an increase of 14 m tons per hectare...

journal_title：Planta

authors： Humphries EC,French SA

更新日期：1969-03-01 00:00:00

abstract：:The lower epidermis from leaves of Primula palinuri can be stripped off. Light-saturation curves of the CO2-exchange were measured at 20°C and 300 ppm CO2. Whereas the normal leaf reaches light-saturation at 0.3 cal cm(-2) min(-1), even 0.6 cal cm(-2) min(-1) is not sufficient to saturate the stripped leaf. Transpirat...

journal_title：Planta

authors： Bertsch A

更新日期：1969-03-01 00:00:00

abstract：:1. The technique of streak photography was modified to use seven parallel cameras, each focused on an individual root in a guide holding flowing nutrient. Streak photographs representing displacement of points on the longitudinal axis of the root were projected on the table of an image plane digitizer. The displacemen...

journal_title：Planta

authors： List A Jr

更新日期：1969-03-01 00:00:00

abstract：:Differentiation of shoots and roots or unorganized proliferation could be induced in tissue cultures of Solanum xanthocarpum when callus tissues habituated to a medium containing 2.4-D and meso-inositol were transferred to an auxinfree medium or to a medium in which the ratio of auxin and meso-inositol had been altere...

journal_title：Planta

authors： Rao PS,Narayanaswami S

更新日期：1968-12-01 00:00:00

abstract：:Phytochrome per fresh weight in the apical 0.5 cm of the 1.5-cm coleoptile was twice that in the basal 0.5 cm; phytochrome per dry weight and phytochrome per DNA did not vary significantly from the base to the apex. Ratios of phytochrome to fresh or dry weight in the 6-cm coleoptile were nearly constant in the basal 5...

journal_title：Planta

authors： Correll DL,Edwards JL,Medina VJ

更新日期：1968-12-01 00:00:00

abstract：:Morphogenesis and differentiation of the young gametophytes (=sporelings) of Dryopteris filix-mas are controlled by light. Blue light leads to the formation of "normal" two-dimensional prothallia; under red light, however, the gametophytes grow as cellular filaments. Morphogenesis in blue light is connected with an in...

journal_title：Planta

authors： Bergfeld R

更新日期：1968-09-01 00:00:00

abstract：:As an extension of earlier cytophysiological and morphological studies on differentiating cells of Micrasterias denticulata, a fine structural investigation of glutaraldehyde-osmium tetroxide fixed material has been made. Special emphasis has been placed on the distribution of cytoplasmic microtubules and on their pos...

journal_title：Planta

authors： Kiermayer O

更新日期：1968-09-01 00:00:00

abstract：:It is shown that simple, unbranched, plasmodesmata between young xylem ray cells of willow have no direct intercellular continuity apart from the plasmalemma which limits the cytoplasm and lines the plasmodesmatal canal. Each plasmodesma is traversed by a 200 Å diameter tubule (the desmotubule) which has a wall with p...

journal_title：Planta

authors： Robards AW

更新日期：1968-09-01 00:00:00

abstract：:Two phosphorylases could be detected on gel-electropherograms of leaf-extracts of Spinacia oleracea and of immature cotyledons of Vicia faba. These two phosphorylases could be separated by means of ammonium sulfate fractionation. Both the slower migrating phosphorylases from spinach and from beans, but not the fast on...

journal_title：Planta

authors： de Fekete MA

更新日期：1968-09-01 00:00:00

abstract：:Isotherms of K(Rb)-, Cl- and SO4-uptake by young and old branches of the moss Mnium cuspidatum were investigated. Old moss gametophytes from the 1966 vegetation period were collected in the forests surrounding Darmstadt from February to mid-April 1967 and from the 1967 season in late September 1967. Young plants were ...

journal_title：Planta

authors： Lüttge U,Bauer K

更新日期：1968-09-01 00:00:00

abstract：:As previously found, both the level of ether-extractable auxin (presumably indole-3-acetic acid) and the root-forming ability of B.xcheimantha leaves are increased under long-day conditions by high temperature, whereas the capacity for adventitious bud formation is reduced. However, this relation is present under rela...

journal_title：Planta

authors： Heide OM

更新日期：1968-06-01 00:00:00

abstract：:A method has been devised to ensure capture of large numbers of live paramecia within a short period of time under controlled conditions by the bladders of Utricularia gibba. The method permits a direct evaluation of the role of entrapped animals in the nutrition of this carnivorous plant. Paramecia captured by the bl...

journal_title：Planta

authors： Sorenson DR,Jackson WT

更新日期：1968-06-01 00:00:00

abstract：:Fine-structural investigations of 24 monocotyledons from 21 families and all but one order succeeded in revealing a plastid with cuneate proteinaceous inclusion bodies as being typical of monocot sieve-tubes. Inclusion bodies originate in large numbers during plastid differentiation; they concentrate in the matrix and...

journal_title：Planta

authors： Behnke HD

更新日期：1968-06-01 00:00:00

abstract：:The endogenous respiration of an achlorophyllous mutant of Chlorella vulgaris is enhanced by small amounts of blue light. The action spectrum for this effect shows two peaks at λ 460 and 375 mμ, which points to a flavin or a carotenoid in cis configuration as the likely photoreceptor responsible. WEBER'S (1950) observ...

journal_title：Planta

authors： Kowallik W

更新日期：1968-06-01 00:00:00

abstract：:By comparing (32)P-orthophosphate incorporation into nucleic acid extracts of sterile and non-sterile radish leaf discs, it was shown that contaminating bacteria cause a 2-4 fold increase in the rate of precursor incorporation and alter the pattern of label distribution after fractionation of the extracts by sedimenta...

journal_title：Planta

authors： Burdett AN,Wareing PF

更新日期：1968-03-01 00:00:00

abstract：:Liberation of (14)CO2 from (14)C urea by Spirodela oligorrhiza plants was proportional to their level of urease as assayed by formation of ammonia in extracts. The composition of the soluble nitrogen pool of plants growing on urea differed from that of plants growing on ammonium, mainly with regard to levels of amides...

journal_title：Planta

authors： Cook AR

更新日期：1968-03-01 00:00:00