[Sieve-tube plastids of monocotyledons : Comparative investigations of the fine structure and distribution of specific plastids].

abstract：:The hydraulic conductivities of excised whole root systems of wheat (Triticum aestivum L. cv. Atou) and of single excised roots of wheat and maize (Zea mays L. cv. Passat) were measured using an osmotically induced back-flow technique. Ninety minutes after excision the values for single excised roots ranged from 1.6·1...

journal_title：Planta

authors： Jones H,Leigh RA,Wyn Jones RG,Tomos AD

更新日期：1988-04-01 00:00:00

abstract：:Stable-isotope discrimination factors (D) for the uptake of oxygen during respiration by a variety of plant materials were determined by measuring (18)O enrichment in a closed system. Baker's yeast (Saccharomyces cerevisiae Meyer) and mitochondrial preparations from baker's yeast and from castor bean (Ricinus communis...

journal_title：Planta

authors： Guy RD,Berry JA,Fogel ML,Hoering TC

更新日期：1989-04-01 00:00:00

abstract：:The appearance of glutamine synthetase (GS. EC 6.3.1.2) in response to light and nitrogen (NO 3 (-) , NH 4 (+) ) was studied in the organs (roots, hypocotyl, cotyledonary whorl) of the Scots pine (Pinus sylvestris L.) seedling. Although GS activity was found to be mainly (> 80%) located in the whorl where it increased...

journal_title：Planta

authors： Elmlinger MW,Mohr H

更新日期：1992-10-01 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：:The role of purine and pyrimidine ribosides, nucleotides and substituted xanthines in the differentiation of chloronema filaments in suspension cultures of protonema of the moss Funaria hygrometrica Hedw. has been examined. Cyclic adenosine-3',5'-monophosphate (cAMP) and mono-and dibutyryl cAMP evoked the maximum resp...

journal_title：Planta

authors： Handa AK,Johri MM

更新日期：1979-01-01 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：:The uptake and conversion of NO 2 (-) and the effect of NO 2 (-) on the uptake and reduction of NO 3 (-) were examined in N-depleted Phaseolus vulgaris L. Nitrite uptake at 0.1 mmol dm(-3) was against an electrochemical gradient and became constant after one or two initial phases. Steadystate uptake declined with incr...

journal_title：Planta

authors： Breteler H,Luczak W

更新日期：1982-12-01 00:00:00

abstract：:In this work, we analyze protein phosphatase (PP) involvement in the sucrose-mediated induction of fructan metabolism in wheat (Triticum aestivum). The addition of okadaic acid (OA), a PP-inhibitor, to sucrose-fed leaves reduced fructosylsucrose-synthesizing activity (FSS) induction in a dose-dependent manner. The exp...

journal_title：Planta

authors： Martínez-Noël GM,Tognetti JA,Salerno GL,Wiemken A,Pontis HG

更新日期：2009-10-01 00:00:00

abstract：:FLOWERING LOCUS C (FLC) is a central floral repressor for the determination of flowering time in Arabidopsis. FLC expression is reactivated upon fertilization and regulated during seed development to ensure the appropriate floral behavior; however, the molecular mechanism for this process is largely unknown. Here, we ...

journal_title：Planta

authors： Yun H,Hyun Y,Kang MJ,Noh YS,Noh B,Choi Y

更新日期：2011-12-01 00:00:00

abstract：:Senescence of barley (Hordeum vulgare L. cv. Carina) primary foliage leaves was induced by transfer of the plants into darkness for 2 d. Under these conditions senescence was characterized by a light-reversible decline in the efficiency of photosystem II, and in chlorophyll and protein contents. To isolate senescence-...

journal_title：Planta

authors： Kleber-Janke T,Krupinska K

更新日期：1997-01-01 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 lemma and palea (lemma/palea), which form the husk of barley (Hordeum vulgare L.) seeds, constitutively express high levels of defense-related genes, relative to leaves [Abebe et al. (2004) Crop Sci 44:942-950]. One of these genes, Lem2, is expressed mainly in the lemma/palea and coleoptile and is strongly upregul...

journal_title：Planta

authors： Abebe T,Skadsen RW,Kaeppler HF

更新日期：2005-05-01 00:00:00

abstract：MAIN CONCLUSION:ATR-FTIR spectroscopy in combination with uni- and multivariate analysis was used to quantify the spectral-chemical composition of the leaf cuticle of pea, investigating the effects of variety and heat stress. Field pea (Pisum sativum L.) is sensitive to heat stress and our goal was to improve canopy co...

journal_title：Planta

authors： Liu N,Karunakaran C,Lahlali R,Warkentin T,Bueckert RA

更新日期：2019-02-01 00:00:00

abstract：:The free amino acid pools in the nitrogen-fixing blue-green algae Anabaena cylindrica, A. flos-aquae and Westiellopsis prolifica contain a variety of amino acids with aspartic acid, glutamic acid and the amide glutamine being present in much higher concentrations than the others. This pattern is characteristic of that...

journal_title：Planta

authors： Dharmawardene MW,Stewart WD,Stanley SO

更新日期：1972-06-01 00:00:00

abstract：:Arginase (EC 3.5.3.1) localization was studied in soybean (Glycine max L.) seedling cotyledons. Subcellular fractionation in a discontinuous Percoll gradient showed that arginase was localized in the mitochondrion. Arginine (Arg) uptake by mitochondria was demonstrated by co-sedimentation of [3H]Arg-derived label and ...

journal_title：Planta

authors： Goldraij A,Polacco JC

更新日期：2000-03-01 00:00:00

abstract：:Mycorrhizal colonization of genetically modified hybrid aspen (Populus tremula x P. tremuloides Michx.) was investigated over 15 months in a field experiment. The aspen carried the rolC gene from Agrobacterium rhizogenes under control of either the constitutive cauliflower mosaic virus 35S promoter or the light-induci...

journal_title：Planta

authors： Kaldorf M,Fladung M,Muhs HJ,Buscot F

更新日期：2002-02-01 00:00:00

abstract：:Four mutants of maize (Zea mays L.) defective in chlorophyll biosynthesis have been analyzed with regard to the sites of their lesions and their effects on chloroplast development. Two yellow mutants, which accumulate no detectable porphyrin precursors when grown in darkness, are defective in the conversion of protopo...

journal_title：Planta

authors： Mascia PN,Robertson DS

更新日期：1978-01-01 00:00:00

abstract：:Barley leaves extracted 35 min after a 15-min pulse of 10(-6) M (14)C-labelled cis,trans-(±)-abscisic acid (ABA) showed very little breakdown of the ABA. Leaves extracted 2 h after a 30-min pulse of 10(-5) M labelled ABA showed at least 34% degradation of the hormone. The pattern of degradation was very similar for le...

journal_title：Planta

authors： Cummins WR

更新日期：1973-06-01 00:00:00

abstract：:Hypocotyls of dark-grown seedlings of Arabidosis thaliana exhibit a strong negative gravitropism, which is reduced by red and also by long-wavelength, far-red light treatments. Light treatments using phytochrome A (phyA)- and phytochrome B (phyB)-deficient mutants showed that this response is controlled by phyB in a r...

journal_title：Planta

authors： Poppe C,Hangarter RP,Sharrock RA,Nagy F,Schäfer E

更新日期：1996-01-01 00:00:00

abstract：:The actin cytoskeleton is a key player in defense responses during early stages of infection by fungal pathogens. To investigate molecular mechanisms of actin-related defense responses, a cultured tobacco ( Nicotiana tabacum L.) BY-2 cell system was devised. When conidia were directly deposited on BY-2 cells, neither ...

journal_title：Planta

authors： Kobayashi I,Hakuno H

更新日期：2003-06-01 00:00:00

abstract：:Cyclic electron transport around photosystem (PS) I is believed to play a role in generation of ATP required for adaptation to stress in cyanobacteria and plants. However, elucidation of the pathway(s) of cyclic electron flow is difficult because of low rates of this electron flow relative to those of linear photosynt...

journal_title：Planta

authors： Howitt CA,Cooley JW,Wiskich JT,Vermaas WF

更新日期：2001-11-01 00:00:00

abstract：:In cells of Zea mays (root hairs, coleoptiles) and Riccia fluitans (rhizoids, thalli) intracellular Ca(2+) and pH have been measured with double-barrelled microelectrodes. Free Ca(2+) activities of 109-187 nM (Riccia rhizoids), 94-160 nM (Riccia thalli), 145-231 nM (Zea root hairs), 84-143 nM (Zea coleoptiles) were fo...

journal_title：Planta

authors： Felle H

更新日期：1988-11-01 00:00:00

abstract：:Gibberellin (GA) biosynthesis in cell-free systems from Cucurbita maxima L. endosperm was reinvestigated using incubation conditions different from those employed in previous work. The metabolism of GA12 yielded GA13, GA43 and 12α-hydroxyGA43 as major products, GA4, GA37, GA39, GA46 and four unidentified compounds as ...

journal_title：Planta

authors： Lange T,Hedden P,Graebe JE

更新日期：1993-03-01 00:00:00

abstract：:Annexins are multifunctional proteins characterized by their capacity to bind calcium ions and negatively charged lipids. Although there is increasing evidence implicating their importance in plant stress responses, their functions in seeds remain to be further studied. In this study, we identified a heat-induced anne...

journal_title：Planta

authors： Chu P,Chen H,Zhou Y,Li Y,Ding Y,Jiang L,Tsang EW,Wu K,Huang S

更新日期：2012-06-01 00:00:00

abstract：MAIN CONCLUSION:Endogenous auxin determines the pattern of adventitious shoot formation. Auxin produced in the dominant shoot is transported to the internodal segment and suppresses growth of other shoots. Adventitious shoot formation is required for the propagation of economically important crops and for the regenerat...

journal_title：Planta

authors： Koike I,Watanabe S,Okazaki K,Hayashi KI,Kasahara H,Shimomura K,Umehara M

更新日期：2020-03-05 00:00:00

abstract：:Phenylalanine ammonia-lyase (PAL, EC 4.3.1.5) and cinnamic acid 4-hydroxylase (CA4H, EC 1.14.13.11) undergo concomitant increases in activity after a 2 h lag following disc preparation and illumination. The increases in PAL and CA4H activity can be inhibited by actinomycin-D, cordycepin and cycloheximide. It is demons...

journal_title：Planta

authors： Lamb CJ

更新日期：1977-01-01 00:00:00

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：:In spite of their silent and sessile life, plants are dynamic organisms that have developed advanced defence strategies in their adaptation to the pressure of herbivores and pathogens. Natural plant products play an important role as chemical weapons in this warfare. Characteristic of cruciferous plants is the synthes...

journal_title：Planta

authors： Hansen BG,Halkier BA

更新日期：2005-07-01 00:00:00

abstract：:Eukaryotic genomes harbor mobile genetic elements known as long terminal repeat (LTR) retrotransposons. LTR retrotransposons are closely related to the infectious and endogenous retroviruses. The viral envelope (env) gene of the retroviruses, which is responsible for their infective properties, distinguishes them from...

journal_title：Planta

authors： Abdel Ghany AG,Zaki EA

更新日期：2002-12-01 00:00:00

abstract：:Limbs of flower buds from Petunia hybrida were investigated for β-glucosidase activity with dihydroflavonol-glucosides and 4-methyl-umbelliferyl-β-D-glucoside as substrates. Dihydroflavonol-glucoside β-glucosidase is localized in the cell wall. This activity has an acid pH optimum and is also active toward 4-methyl-um...

journal_title：Planta

authors： Schram AW,Al EJ,Douma N,Jonsson LM,de Vlaming P,Kooi A,Bennink GJ

更新日期：1982-07-01 00:00:00