abstract：:1. Factors were investigated which control the formation of photosynthetic enzymes during germination. Enzymes of the reductive pentose phosphate cycle like carboxydismutase (EC 4.1.1.39) and NADP-dependent glyceraldehydephosphate dehydrogenase (EC 1.2.1.9.) are formed in the primary leaves of dark-grown rye seedlings...

journal_title：Planta

authors： Feierabend J

更新日期：1968-03-01 00:00:00

abstract：:Sphagnum magellanicum shows a remarkable variation in colour after the repeated application of cold shocks; mainly red wall pigments are synthesized. An attempt was made to find out in which way the gas exchange of Sphagnum magellanicum under defined conditions is altered after the application of cold shocks.The light...

journal_title：Planta

authors： Rudolph H

更新日期：1968-03-01 00:00:00

abstract：:Internode segments excised from vegetative stems of Plumbago indica, an absolute short-day plant, can be induced to form in vitro a callus, or roots, or vegetative shoots, or inflorescences and flowers. Callus formation was polarized when indolyl-3-acetic acid, L-tryptophane, naphthylacetamide, or 2,3-dichlorophenylac...

journal_title：Planta

authors： Nitsch C,Nitsch JP

更新日期：1967-12-01 00:00:00

abstract：:Rice shoot elongation was inhibited by 50% at 0.158 M CCC used as a presowing seed treatment. This inhibition was partially reversed by MH (0.001 M) or B-Nine (0.002 M). The reversing potentiality of MH or B-Nine was not additive. The significance of the result is discussed. ...

journal_title：Planta

authors： Mishra D,Paul SC

更新日期：1967-12-01 00:00:00

abstract：:In the qualitative short-day plant Impatiens balsamina, gibberellic acid (GA3) not only promoted the formation of floral buds in response to suboptimal photoinductive conditions and reduced the number of SD cycles that are required for their development into flowers, but also caused initiation of floral buds under non...

journal_title：Planta

authors： Nanda KK,Krishnamoorthy HN,Anuradha TA

更新日期：1967-12-01 00:00:00

abstract：:Influx and efflux of anions in leaves of Elodea canadensis were investigated. A major component of phosphate efflux was found to be a function of the external phosphate concentration in accord with saturation kinetics, i.e. it was found to be proportional to phosphate influx. This suggests that the transport structure...

journal_title：Planta

authors： Weigl J

更新日期：1967-12-01 00:00:00

abstract：:The photosynthetic CO2-fixation of cell cultures of Nicotiana tabacum var. "Samsun" is strongly inhibited by 2,4-dichlorphenoxyacetic acid and lies below the compensation point in cells grown with 2,4-D as an auxin. Cultivating the tobacco cells with α-naphthylacetic acid instead of 2,4-D results in an increase in the...

journal_title：Planta

authors： Bergmann L

更新日期：1967-09-01 00:00:00

abstract：:The net increase in total protein during development of tomato fruit locule tissue has been further investigated with respect to the sites of protein synthesis within the cells. The results point to the plastids as being the major sites of protein synthesis. This is supported by radioisotope experiments in which label...

journal_title：Planta

authors： Davies JW,Cocking EC

更新日期：1967-09-01 00:00:00

abstract：:When (3)H-(14)C-acetate was supplied to Chlorella pyrenoidosa in the light, glycollic acid became rapidly labelled with tritium and (14)C. The [Formula: see text]ratio of glycollate was 10, whilst the ratio was 4 in the acetate added. Both (3)H and (14)C from acetate were present in glycollate before they were present...

journal_title：Planta

authors： Merrett MJ,Goulding KH

更新日期：1967-09-01 00:00:00

abstract：:'Warm white' fluorescent light inhibited the elongation of potato sprouts and reduced the rate at which reserve materials in the mother tuber were mobilized. The evidence indicated that the influence of light on mobilization was independent of light effects on the magnitude of the 'sink' for translocates in the sprout...

journal_title：Planta

authors： Morris DA

更新日期：1967-09-01 00:00:00

abstract：:Peptone is more effective than nitrate as a nitrogen source for heterotrophic cultures of Chlorella vulgaris (Emerson strain). It allows the production of an increased amount of algal material and supports an enhanced rate of cell division. Peptone-supplied heterotrophic cultures have a significantly higher content of...

journal_title：Planta

authors： Griffiths DJ

更新日期：1967-06-01 00:00:00

abstract：:Helminthosporol, helminthosporic acid, dihydrohelminthosporic acid, and steviol have been tested for their ability to induce antheridium formation in Anemia phyllitidis. All helminthosporol derivatives posses a limited but real activity. Steviol proved to be inactive.All the substance tested have a significant effect ...

journal_title：Planta

authors： Schraudolf H

更新日期：1967-06-01 00:00:00

abstract：:Experiments with 20 cm long segments of etiolated pea epicotyls treated in the middle with 0,5% gibberellin paste (GA3) in the form of a ring and also with a 0,5% indoleacetic acid (IAA) paste either near the apical or near the basal pole showed that in all cases after 24 hours there was a stronger transport of GA3 to...

journal_title：Planta

authors： Sebánek J,Hink J

更新日期：1967-06-01 00:00:00

abstract：:Experiments have been carried out to determine the basis for the dependence of chloroplast pigment synthesis on protein synthesis in dark-grown cells of Euglena gracilis greening in the light. The complete inhibition of chlorophyll synthesis brought about by actidione (10 μg/ml) when added half way through the greenin...

journal_title：Planta

authors： Kirk JT

更新日期：1967-06-01 00:00:00

abstract：:Canavanine is an arginine analogue found in the seeds of many common legumes and is known to inhibit protein synthesis and growth in a number of organisms. Yet canavanine may comprise as much as 4% of the seed dry weight of the jackbean (Canavalia ensiformis).Canavanine is accumulated during earlier development in the...

journal_title：Planta

authors： Williams SE,Hunt GE

更新日期：1967-06-01 00:00:00

abstract：:The responses to synthetic d,l abscisin have been studied in a variety of tests. When fed in aqueous solution continuously to leaves of seedlings growing under long day conditions, d,l abscisin caused the cessation of extension growth and the formation of typical resting-buds in Betula pubescens, Acer pseudoplatanus a...

journal_title：Planta

authors： El-Antably HM,Wareing PF,Hillman J

更新日期：1967-03-01 00:00:00

abstract：:Enzyme activity is not uniformly distributed through the cotyledon of Pisum arvense. Initially the peripheral region, certain scattered cells of the storage tissue and the procambium show a high level of activity of succinic dehydrogenase, cytochrome oxidase, acid phosphatase and esterase. Activity of acid phosphatase...

journal_title：Planta

authors： Flinn AM,Smith DL

更新日期：1967-03-01 00:00:00

abstract：:Taking into account the literature on the so-called sieve-tube slime ("mictoplasm", "slime strands") and regarding its fine structure more in detail the term plasmatic filament ("Plasmafilament") is proposed and will be used in this paper to characterize the individual exceedingly fine subunit of the plasmatic network...

journal_title：Planta

authors： Behnke HD,Dörr I

更新日期：1967-03-01 00:00:00

abstract：:The induction of monospore-development in the Conchocelis stage of Porphyra tenera KJELLM. was investigated. 1. Experiments with light-breaks during the dark-periods indicate the decisive role of a photoperiodic control. 2. The critical daylength is approximately 10 hr. Daily light periods longer than 10 hrs inhibit t...

journal_title：Planta

authors： Rentschler HG

更新日期：1967-03-01 00:00:00

abstract：:Plants of Pinguicula lusitanica were grown in individual Erlenmeyer flasks on an inorganic agar medium containing no nitrogen or phosphorus. After 8 weeks of culture, twenty of the plants were fed Pinus pollen 4 times over a period of 5 weeks.As a result of the feeding, the number of leaves as well as the diameters of...

journal_title：Planta

authors： Harder R,Zemlin I

更新日期：1967-03-01 00:00:00

abstract：:Increasing blue light intensity inhibits the growth of Chlorella pyrenoidosa in glucose culture in which photosynthesis is blocked by DCMU, whereas red light supports growth which is the same as or better than that in dark controls.The action spectrum of light induced protein synthesis from exogenous glucose (photosyn...

journal_title：Planta

authors： Kowallik W

更新日期：1966-09-01 00:00:00

abstract：:1. The retarding effect of (2-chloroethyl)trimethylammonium chloride (CCC) on germination of kale seeds is reduced and overcome by either kinetin or gibberellic acid (GA). 2. Coumarin inhibition of germination is reduced by kinetin but not by GA. 3. Germination of seeds treated with coumarin in combination with CCC is...

journal_title：Planta

authors： Knypl JS

更新日期：1966-09-01 00:00:00

abstract：:The nucleotide composition of ribosomal, soluble and total ribonucleic acids (RNA) from the zoospores of Rhizophlyctis rosea was determined. The base ratios for ribosomal, soluble, and total RNA were 49.16, 51.79 and 49.97 moles percent, guanylic acid (G) and cytidylic acid (C) respectively. The distribution of the nu...

journal_title：Planta

authors： Léjohn HB,Lovett JS

更新日期：1966-09-01 00:00:00

abstract：:1. The course of senescence in leaves of corn seedlings, as measured by the loss of chlorophyll, is shown to be controlled by two correlative influences: a) In the isolated leaf, the base tends to enhance yellowing of the tip region. b) In the leaf attached to the intact plant, correlative aging is delayed by interact...

journal_title：Planta

authors： Müller K,Leopold AC

更新日期：1966-06-01 00:00:00

abstract：:In a previous paper (HOCK, KüHNERT and MOHR, 1965) we have shown that fat degradation in the cotyledons of the mustard seedling (Sinapis alba L). is under the control of active phytochrome (=P730), at least to a certain extent. One could imagine that P730 might exert this control over fat consumption through isocitrit...

journal_title：Planta

authors： Karow H,Mohr H

更新日期：1966-06-01 00:00:00

abstract：:Studies reported here reveal a low nitrate reductase activity in the shoots of MTU 9 rice plants while in roots high enzyme activity has been recorded.Under pathogenesis, a low nitrate reductase activity in the roots and a high enzyme activity in the shoots have been recorded in susceptible rice plants. In the resista...

journal_title：Planta

authors： Singh TK,Subramanian S

更新日期：1966-06-01 00:00:00

abstract：:Hydrogen sulphide is an essential electron donor in the photosynthesis of sulphur bacteria. In addition, it has been known to be an inhibitor of photosynthesis in green plants. More specifically, it is assumed that sulphide interacts with the oxygen-evolving system. If the view is accepted that there is a more or less...

journal_title：Planta

authors： Knobloch K

更新日期：1966-03-01 00:00:00

abstract：:The high rate of respiration in Chlorella which is found after feeding with glucose or after a longer period of photosynthesis, declines in the dark in the course of hours to about a quarter of its original value. Blue-green light (λ<550 mμ) specifically counteracts this decline and maintains the high rate. This blue ...

journal_title：Planta

authors： Kowallik W,Gaffron H

更新日期：1966-03-01 00:00:00

abstract：:Sieve tube "slime" is probably fibrillar as suggested by other workers. The granular material seen in electron micrographs of sieve tubes "fixed" with potassium permanganate is mostly a precipitate produced by the reaction of the permanganate with the sieve tube contents, particularly with sucrose, and with reagents u...

journal_title：Planta

authors： Johnson RP

更新日期：1966-03-01 00:00:00

abstract：:1. The following acid hydrolases are partially sedimentable from cell-free extracts of corn seedlings: protease (pH-optimum 4,2), phosphatase (pH-optimum 5,0 and 6,5), unspecific esterase (pH-optimum 5,2), RNase (pH-optimum 6,5), arylsulphatase-C (pH-optimum 5,0) and α- and β-amylase (pH-optimum 7,0 and 5,0 respective...

journal_title：Planta

authors： Semadeni EG

更新日期：1966-03-01 00:00:00

abstract：:1. It has been shown that the percentage germination of seed in contact with an aqueous solution depends (a) on the extent of differential permeability of the seed coat to the solute and (b) on whether the solute is toxic. 2. In investigations with "Meteor" pea seeds, polyethylene glycols of nominal molecular weights ...

journal_title：Planta

authors： Manohar MS

更新日期：1966-03-01 00:00:00