Abstract:
:Changes in the rotational motion of paramagnetic and fluorescent lipid-soluble probes were used to assess the effects of putrescine, spermidine and spermine on the fluidity of microsomal membranes from primary leaves of bean (Phaseolus vulgaris L.). Surface probes were more strongly immobilized by physiological concentrations of the polyamines than probes that partitioned deep into the bilayer interior. Spermidine and spermine were more effective than putrescine at reducing membrane fluidity, and at equimolar concentrations, the polyamines and calcium had similar effects on the mobility of the membrane probes. Spermine had essentially equivalent effects on the fluidity of native membranes, heat-denatured membranes and liposomes prepared from the total lipid extract of the membranes, indicating that polyamines associate with membrane lipid. These results raise the possibility that some of the physiological effects previously attributed to exogenously added polyamines could reflect membrane rigidification rather than a true physiological response.
journal_name
Plantajournal_title
Plantaauthors
Roberts DR,Dumbroff EB,Thompson JEdoi
10.1007/BF00391345subject
Has Abstractpub_date
1986-03-01 00:00:00pages
395-401issue
3eissn
0032-0935issn
1432-2048journal_volume
167pub_type
杂志文章相关文献
PLANTA文献大全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
pub_type: 杂志文章
doi:10.1007/BF00390132
更新日期:1966-06-01 00:00:00
abstract::Lipid synthesis was studied in successive leaf sections from the base to the tip of developing barley (Hordeum vulgare L.), maize (Zea mays L.), rye grass (Lolium perenne L.) and wheat (Triticum aestivum L.) leaves. The endogenous levels of acyl lipids and their constituent fatty acids from the same leaf sections were...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00388640
更新日期:1978-01-01 00:00:00
abstract::The initial step in the synthesis of isoleucine (Ile) is the conversion of threonine to alpha-ketobutyrate. This reaction is carried out by threonine deaminase (TD), which is feedback-regulated by Ile. Mutations in TD that manifest insensitivity to Ile feedback inhibition result in intracellular accumulation of Ile. P...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-003-1129-x
更新日期:2004-03-01 00:00:00
abstract::Two isoenzymes each of glucosephosphate isomerase (EC 5.3.1.9), phosphoglucomutase (EC 2.7.5.1), glucose-6-phosphate dehydrogenase (EC 1.1.1.49) and 6-phosphogluconate dehydrogenase (EC 1.1.1.43) were separated by (NH4)2SO4 gradient solubilization and DEAE-cellulose ion-exchange chromatography from green leaves of the...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00379933
更新日期:1979-01-01 00:00:00
abstract::Nucellar-derived cell cultures of sour orange (Citrus aurantium L.) proliferate as proembryogenic masses. By a change in the carbon source of the medium from sucrose to glycerol they are induced to undergo synchronous embryogenesis forming embryo initials that develop into globular embryos. The proembryogenic masses r...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00198030
更新日期:1992-03-01 00:00:00
abstract:MAIN CONCLUSION:In this genome-wide association study, we obtained novel insights into the genetic basis of the effect of herbivory or drought stress on the level of resistance against the fungus Botrytis cinerea. In nature, plants function in complex environments where they encounter different biotic and abiotic stres...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-018-3065-9
更新日期:2019-04-01 00:00:00
abstract::In order to survive sunlight in the absence of water, desiccation-tolerant green plants need to be protected against photooxidation. During drying of the chlorolichen Cladonia rangiformis and the cyanolichen Peltigera neckeri, chlorophyll fluorescence decreased and stable light-dependent charge separation in reaction ...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-008-0766-5
更新日期:2008-09-01 00:00:00
abstract:MAIN CONCLUSION:The HRA2pl peptide expressed by transient transformation in N. tabacum plants is capable of inhibiting the binding of the human metapneumovirus to HEp-2 cells at the fusion stage. Human metapneumovirus (hMPV) is an agent responsible for acute respiratory infections that mainly affects children under 3 y...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-015-2277-5
更新日期:2015-07-01 00:00:00
abstract::We have investigated whether sucrose accumulation in heterotrophic cell-suspension cultures of Chenopodium rubrum L. is regulated by a cycle in which sucrose is simultaneously synthesised and degraded. Net sucrose accumulation was measured by monitoring the sucrose content, unidirectional synthesis was monitored by su...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00197115
更新日期:1990-09-01 00:00:00
abstract:MAIN CONCLUSION:Four polygalacturonase gene family members were highlighted that contribute to elucidate the roles of polygalacturonase during the fertility conversion process in male-sterile wheat. Polygalacturonase (PG) belongs to a large family of hydrolases with important functions in cell separation during plant g...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-020-03435-w
更新日期:2020-08-01 00:00:00
abstract::C2H4 production of the embryonic axes and cotyledons excised from dormant and non-dormant cocklebur (Xanthium pennsylvanicum Wallr.) seeds was examined in relation to ambient O2 tensions. There were two kinds of C2H4-producing systems, quasi-anaerobic and aerobic, in both organs. Regardless of the organ, the former ac...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00390908
更新日期:1976-01-01 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
pub_type: 杂志文章
doi:10.1007/BF00386454
更新日期:1969-09-01 00:00:00
abstract::A rice htd-1 mutant, related to tillering and dwarfing, was characterized. We show that the htd-1 mutant increases its tiller number by releasing axillary buds from dormant stage rather than by initiating more axillary buds. The dwarf is caused by averagely reducing each internode and panicle. Based on this dwarfing p...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-005-0007-0
更新日期:2005-11-01 00:00:00
abstract::Leaves ofNerium oleander L. plants, which had been previously kept in a shaded glasshouse for at least two months, were fed 1 mM dithiothreitol (DTT) through their petioles, either for 12h in darkness (overnight) or for 2h in low light (28 μmol photons·m(-2)·s(-1)), in each case followed by a 3-h exposure to high ligh...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF02411406
更新日期:1989-12-01 00:00:00
abstract::Secoisolariciresinol diglucoside (SDG), the main phytoestrogenic lignan of Linum usitatissimum, is accumulated in the seed coat of flax during its development and pinoresinol-lariciresinol reductase (PLR) is a key enzyme in flax for its synthesis. The promoter of LuPLR1, a flax gene encoding a pinoresinol lariciresino...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-011-1492-y
更新日期:2012-01-01 00:00:00
abstract::The new type blue light (BL) receptor aureochrome (AUREO) was recently discovered in a stramenopile alga, Vaucheria (Takahashi et al. Proc Natl Acad Sci USA 104(49):19625-19630, 2007). AUREO has a bZIP (basic region/leucine zipper) and BL-sensing light-oxygen-voltage (LOV) domain and functions as a BL-activated transc...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-009-0967-6
更新日期:2009-08-01 00:00:00
abstract::The inhibition of hypocotyl lengthening in intact mustard seedlings is controlled by two photosensitive systems which can be experimentally separated. 1. Kinetics of the growth response in the dark after red and far-red irradiation (Figs. 1, 2) demonstrate the operation of Pfr in the ground state via a threshold mecha...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00385217
更新日期:1971-06-01 00:00:00
abstract::Seedlings of Amaranthus caudatus L. var. Pendula were used to study the influence of several treatment: white light, 3,4-dihydroxyphenylalanine (DOPA), kinetin, gibberellic acid (GA3) on betalains biosynthesis. The pigments, betacyanins and betaxanthins, were separated using a Sephadex G-15 column chromatography. Qual...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00380880
更新日期:1980-07-01 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
pub_type: 杂志文章
doi:10.1007/s00425-009-1002-7
更新日期:2009-10-01 00:00:00
abstract::Photoinhibition of photosynthesis was induced in attached leaves of kiwifruit grown in natural light not exceeding a photon flux density (PFD) of 300 μmol·m(-2)·s(-1), by exposing them to a PFD of 1500 μmol·m(-2)·s(-1). The temperature was held constant, between 5 and 35° C, during the exposure to high light. The kine...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00394766
更新日期:1988-05-01 00:00:00
abstract::Uncovered in studies on photosynthesis 35 years ago, redox regulation has been extended to all types of living cells. We understand a great deal about the occurrence, function, and mechanism of action of this mode of regulation, but we know little about its origin and its evolution. To help fill this gap, we have take...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-012-1803-y
更新日期:2013-02-01 00:00:00
abstract::We have investigated the levels of cell-specific expression of wheat-germ agglutinin (WGA) during the development of embryos and in 3-d-old seedlings. Southern blot analysis of genomic DNA derived from hexaploid and diploid wheat (Triticum) species indicates that the isolated cDNA (complementary DNA) clone is specific...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00395422
更新日期:1988-12-01 00:00:00
abstract:MAIN CONCLUSION:Functional allelic variants of TaGW2 - 6A produce large grains, possibly via changes in endosperm cells and dry matter by regulating the expression of cytokinins and starch-related genes via the ubiquitin-proteasome system. In wheat, TaGW2-6A coding region allelic variants are closely related to the gra...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-017-2759-8
更新日期:2017-12-01 00:00:00
abstract::The cytokinin isomers, 1- and 9-isopentenyladenine, are very active inhibitors of cell division in the protonema of the moss Ceratodon purpureus. They also abolish the N(6)-isopentenyladenine-induced stimulation of cell divisions in this material whereas they are inactive on the induction of gametophore buds in moss p...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00384115
更新日期:1972-09-01 00:00:00
abstract::Mannans are hemicellulosic polysaccharides in the plant primary cell wall (CW). Mature seeds, specially their endosperm cells, have CWs rich in mannan-based polymers that confer a strong mechanical resistance for the radicle protrusion upon germination. The rupture of the seed coat and endosperm are two sequential eve...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-010-1257-z
更新日期:2011-01-01 00:00:00
abstract::Freezing and thawing lead to xylem embolism when gas bubbles caused by ice formation expand during the thaw process. However, previous experimental studies indicated that conifers are resistant to freezing-induced embolism, unless xylem pressure becomes very negative during the freezing. In this study, we show that co...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-003-0997-4
更新日期:2003-07-01 00:00:00
abstract::In addition to membrane translocation, measured in the dark, it was found that pre-illumination of the chloroplasts resulted in an enhancement of sulfate uptake by 25% and of sulfite uptake by 55% as soon as the concentration of the ion in the incubation medium exceeded 2 mmol l(-1). This amount which is additionally ...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00388167
更新日期:1977-01-01 00:00:00
abstract::Suspension-cultured cells of mangrove [Bruguiera sexangula (Lour.) Poir.] showed a rapid increase in vacuolar volume under salt stress, although there was no change in the cell volume. The rapid increase in the vacuolar volume was an active process, which followed the activation of the tonoplast H(+)-ATPase and the va...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-002-0878-2
更新日期:2003-01-01 00:00:00
abstract:MAIN CONCLUSION:Trehalose increased drought tolerance of tomato plants, accompanied by reduced water loss and closed stomata, which was associated with the upregulated ABA signaling-related genes expression, but not in ABA accumulation. Drought is one of the principal abiotic stresses that negatively influence the grow...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-019-03195-2
更新日期:2019-08-01 00:00:00
abstract::The aquaporin NtAQP1 from Nicotiana tabacum L. is insensitive to heavy-metal ions. In addition to water, the transport of urea or glycerol is facilitated by this plasma-membrane-located water channel. Northern hybridization and whole-mount in situ hybridization revealed a high steady-state level of NtAQP1-RNA in roots...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s004250000275
更新日期:2000-07-01 00:00:00