Abstract：
:Equisetaceae has been of research interest for decades, as it is one of the oldest living plant families, and also due to its high accumulation of silica up to 25% dry wt. Aspects of silica deposition, its association with other biomolecules, as well as the chemical composition of the outer strengthening tissue still remain unclear. These questions were addressed by using high resolution (<1 microm) Confocal Raman microscopy. Two-dimensional spectral maps were acquired on cross sections of Equisetum hyemale and Raman images calculated by integrating over the intensity of characteristic spectral regions. This enabled direct visualization of differences in chemical composition and extraction of average spectra from defined regions for detailed analyses, including principal component analysis (PCA) and basis analysis (partial least square fit based on model spectra). Accumulation of silica was imaged in the knobs and in a thin layer below the cuticula. In the spectrum extracted from the knob region as main contributions, a broad band below 500 cm(-1) attributed to amorphous silica, and a band at 976 cm(-1) assigned to silanol groups, were found. From this, we concluded that these protrusions were almost pure amorphous, hydrated silica. No silanol group vibration was detected in the silicified epidermal layer below and association with pectin and hemicelluloses indicated. Pectin and hemicelluloses (glucomannan) were found in high levels in the epidermal layer and in a clearly distinguished outer part of the hypodermal sterome fibers. The inner part of the two-layered cells revealed as almost pure cellulose, oriented parallel along the fiber.
journal_name
Plantajournal_title
Plantaauthors
Gierlinger N,Sapei L,Paris Odoi
10.1007/s00425-007-0671-3subject
Has Abstractpub_date
2008-04-01 00:00:00pages
969-80issue
5eissn
0032-0935issn
1432-2048journal_volume
227pub_type
杂志文章相关文献
PLANTA文献大全abstract：:The role of microtubules and ions in cell shaping was investigated in differentiating guard cells of Allium using light and electron microscopy and cytochemistry. Microtubules appear soon after cytokinesis in a discrete zone close to the plasmalemma adjacent to the common wall between guard cells. The microtubules fan...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00390333
更新日期：1976-01-01 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
pub_type： 杂志文章
doi：10.1007/BF00194430
更新日期：1993-03-01 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：:Extracts of sycamore cambial tissue convert UDP-glucose into UDP-glucuronic acid, and the latter into UDP-xylose and UDP-rhamnose. None of the corresponding galactose series of monosaccharides was formed indicating the absence of epimerases, postulated as an important feature of differentiation. UDP-glucose is formed ...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00386702
更新日期：1972-12-01 00:00:00
abstract：:The expression pattern of the salT gene was analyzed in different cell types and organs of rice (Oryza sativa L.) in response to saline and hormonal treatments to obtain detailed information on the physiological cues controlling gene expression. Gel blot analysis of RNA and in-situ hybridization performed on seedlings...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s004250050470
更新日期：1998-12-01 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：:Cultured tobacco-pith tissue contains a cytoplasmic receptor for indoleacetic acid (IAA). The concentration of binding sites is very low in comparison to that of several auxin receptors found by other investigators. A few obvious possible causes (degradation or inactivation) were investigated. From the results we conc...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00386225
更新日期：1980-06-01 00:00:00
abstract：:We have isolated a gene from loblolly pine, 5NG4, that is highly and specifically induced by auxin in juvenile loblolly pine shoots prior to adventitious root formation, but substantially down-regulated in physiologically mature shoots that are adventitious rooting incompetent. 5NG4 was highly auxin-induced in roots, ...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-003-1175-4
更新日期：2004-04-01 00:00:00
abstract：:The fate of the carbon-20 atom in gibberellin (GA) biosynthesis was studied in a cell-free system from Pisum sativum. This carbon atom is lost at the aldehyde stage of oxidation when C20-GAs are converted to C19-GAs. Gibberellin A12 labeled with (14)C at C-20 was prepared from [3'-(14)C]mevalonic acid with a cell-free...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00392102
更新日期：1986-12-01 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
pub_type： 杂志文章
doi：10.1007/BF00384880
更新日期：1966-09-01 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：:Rapidly growing, green motile flagellates of Haematococcus pluvialis can transform into enlarged red resting cysts (aplanospores) under oxidative stress conditions. However, it is not known what initial molecular defense mechanisms occur in response to oxidative stress, and may ultimately lead to cellular transformati...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-004-1323-5
更新日期：2004-11-01 00:00:00
abstract：:Red light (R) and gibberellins (GA) each induce a water potential decrease in the axes of lettuce (Lactuca sativa L.) embryos resulting in germination of intact "seeds" (achenes) or an increase in growth of the axes of isolated embryos. The fruit coat and endosperm are a substantial barrier to the penetration of exoge...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00391184
更新日期：1981-06-01 00:00:00
abstract：:A fraction of highly purified prolamellar bodies was isolated from etioplasts of wheat (Triticum aestivum L. cv. Starke II, Weibull), as previously described by Ryberg and Sundqvist (1982, Physiol. Plant., 56, 125-132). Studies on the protein composition revealed that only one major polypeptide of an apparent molecula...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00402952
更新日期：1985-06-01 00:00:00
abstract：:The dynamics of actin-filament organization in pollen-tube subprotoplasts ofNicotiana tabacum L. cv. Samsun during regeneration and outgrowth was examined using phalloidin probes and a non-fixation method. A succession of actin arrays was examined during subprotoplast regeneration that strongly resembled the actin dyn...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF02411443
更新日期：1990-03-01 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
pub_type： 杂志文章
doi：10.1007/BF00384859
更新日期：1967-03-01 00:00:00
abstract：:Unrolling of etiolated wheat leaf segments is stimulated by short periods of exposure to red light. Both gibberellic acid and kinetin will stimulate unrolling in the dark, whereas abscisic acid (ABA) inhibits the unrolling response to these two hormones and to red light. Exposure to 5 minutes of red light leads to a r...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00387180
更新日期：1970-09-01 00:00:00
abstract：:Single cell sap sampling and analysis were used to measure the longitudinal and radial distribution of sucrose, glucose and fructose in the apical cell division zone and in the basal, elongated zone of the Ricinus hypocotyl. Sucrose and hexose increased in concentration from the apex to the base of the seedling axis. ...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-006-0309-x
更新日期：2006-11-01 00:00:00
abstract：:When radioactive gibberellin A5 ((3)H-GA5) was applied to the apices and surrounding young leaves of the long-day plant Silene armeria, it was partially converted to at least two other acidic substances. One of them was similar to GA3 in chromatographic, but not in biological properties. The other metabolite was more ...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00385349
更新日期：1971-06-01 00:00:00
abstract：:Several phosphoproteins specifically correlated with the induction of embryogenic cells were detected in immature pollen grains of Nicotiana tabacum L. By regulating the concentration of glutamine in the medium the developmental pathways of immature pollen grains isolated at the mid-bicellular stage could be controlle...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00239984
更新日期：1990-08-01 00:00:00
abstract：:Relative quantum responsivity curves for inhibition of hypocotyl elongation in Sinapis alba L. seedlings previously grown in white light confirm that a marked "end of day" inhibition response can be induced by a monochromatic light treatment (30 min) at the end of the light period. In dark grown seedlings, however, no...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00387814
更新日期：1981-02-01 00:00:00
abstract：:The thermosensitivity of delayed fluorescence, the relative values of variable chlorophyll fluorescence and the degree of quenching of 9-aminoacridine fluorescene were studied in the chloroplasts from heat-acclimated and non-acclimated (treated 6 h at 52,5°C) young bean plants. The temperature sensitivity of each para...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00402981
更新日期：1987-04-01 00:00:00
abstract：:In contrast to seed plants, the roots of most ferns have a single apical cell which is the ultimate source of all cells in the root. The apical cell has a tetrahedral shape and divides asymmetrically. The root cap derives from the distal division face, while merophytes derived from three proximal division faces contri...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-013-1950-9
更新日期：2013-12-01 00:00:00
abstract：:Plant HXXXD acyltransferase-catalyzed malonylation is an important modification reaction in elaborating the structural diversity of flavonoids and anthocyanins, and a universal adaptive mechanism to detoxify xenobiotics. Nicotiana tabacum malonyltransferase 1 (NtMaT1) is a member of anthocyanin acyltransferase subfami...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-012-1660-8
更新日期：2012-09-01 00:00:00
abstract：:Continuous light induces a potentially lethal injury in domesticated tomato (Solanum lycopersicum) plants. Recently, continuous-light tolerance was reported in several wild tomato species, yet the molecular mechanisms underpinning tolerance/sensitivity are still elusive. Here, we investigated from which part of the pl...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-014-2202-3
更新日期：2015-01-01 00:00:00
abstract：:Bean cells habituated to grow in the presence of dichlobenil exhibited reduced cellulose and hemicellulose content and an increase in pectic polysaccharides. Furthermore, following the extraction of pectins and hemicelluloses, a large amount of neutral sugars was released. These sugars were found to be part of a solub...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-013-1861-9
更新日期：2013-06-01 00:00:00
abstract：:O2-uptake and CO2-release by a chlorophyll-free, carotenoid-containing mutant of Chlorella vulgaris increase on addition of Na-glycolate by factors of 4-5 and 5-6, respectively (Fig. 1). In an enzyme preparation of that alga (sonification, centrifugation, precipitation with 0-30% (NH4)2SO4, dialysis) activity of glyco...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00387441
更新日期：1971-09-01 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：MAIN CONCLUSION:PAE8 and PAE9 have pectin acetylesterase activity and together remove one-third of the cell wall acetate associated with pectin formation in Arabidopsis leaves. In pae8 and pae9 mutants, substantial amounts of acetate accumulate in cell walls. In addition, the inflorescence stem height is decreased. Pec...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/s00425-014-2139-6
更新日期：2014-11-01 00:00:00
abstract：:Vascular bundles of petioles below wilted leaves of Nymphoides peltata (S.G. Gmel. O. Kuntze) were frozen intact and freeze-fractured for electron microscopy. Cell walls in them appeared drawn in against the helical thickenings of xylem vessels. By contrast, walls round vessels which had been frozen in vascular bundle...
journal_title：Planta
pub_type： 杂志文章
doi：10.1007/BF00385984
更新日期：1977-01-01 00:00:00
