Abstract：
:Flagellar development in the plurilocular zoidangia of sporophytes of the brown alga Ectocarpus siliculosus was analyzed in detail using transmission electron microscopy and electron tomography. A series of cell divisions in the plurilocular zoidangia produced the spore-mother cells. In these cells, the centrioles differentiated into flagellar basal bodies with basal plates at their distal ends and attached to the plasma membrane. The plasma membrane formed a depression (flagellar pocket) into where the flagella elongated and in which variously sized vesicles and cytoplasmic fragments accumulated. The anterior and posterior flagella started elongating simultaneously, and the vesicles and cytoplasmic fragments in the flagellar pocket fused to the flagellar membranes. The two flagella (anterior and posterior) could be clearly distinguished from each other at the initial stage of their development by differences in length, diameter and the appendage flagellar rootlets. Flagella continued to elongate in the flagellar pocket and maintained their mutually parallel arrangement as the flagellar pocket gradually changed position. In mature zoids, the basal part of the posterior flagellum (paraflagellar body) characteristically became swollen and faced the eyespot region. Electron dense materials accumulated between the axoneme and the flagellar membrane, and crystallized materials could also be observed in the swollen region. Before liberation of the zoospores from the plurilocular zoidangia, mastigoneme attachment was restricted to the distal region of the anterior flagellum. Structures just below the flagellar membrane that connected to the mastigonemes were clearly visible by electron tomography.
journal_name
Protoplasmajournal_title
Protoplasmaauthors
Fu G,Nagasato C,Ito T,Müller DG,Motomura Tdoi
10.1007/s00709-012-0405-7subject
Has Abstractpub_date
2013-02-01 00:00:00pages
261-72issue
1eissn
0033-183Xissn
1615-6102journal_volume
250pub_type
杂志文章相关文献
PROTOPLASMA文献大全abstract：:The present study reports the Agrobacterium rhizogenes-mediated hairy root induction in of an ethno-medicinally significant herb-Boerhaavia diffusa L., for elucidating the underlying competence regarding its biosynthetic (i.e. boeravinone B and eupalitin) and bioactivity (antibacterial, antioxidant and anti-inflammato...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-015-0875-5
更新日期：2016-07-01 00:00:00
abstract：:Intracellular molecular transport and localization are crucial for cells (plant cells as much as mammalian cells) to proliferate and to adapt to diverse environmental conditions. Here, some aspects of the microscopy-based method of fluorescence recovery after photobleaching (FRAP) are introduced. In the course of the ...
journal_title：Protoplasma
pub_type： 杂志文章,评审
doi：10.1007/s00709-013-0604-x
更新日期：2014-03-01 00:00:00
abstract：:Programmed cell death occurs in plants during several developmental processes and during the expression of resistance to pathogen attack (i.e., the hypersensitive response). An unsolved question of plant programmed cell death is whether a unique signaling pathway or different, possibly convergent pathways exist. This ...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-004-0053-7
更新日期：2004-10-01 00:00:00
abstract：:Intestinal ischemia and reperfusion (I/R) causes cellular and tissue damage to the intestine and remote organs such as the liver. Increased production of ROS and nitric oxide and dysregulation of cytoprotective enzymes may be involved in intestinal I/R. The aim was to evaluate the protective effects of glutamine on th...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-017-1102-3
更新日期：2017-11-01 00:00:00
abstract：:Root hairs are tubular cells resulting from a tip-localized growth in which calcium ions play a key role. Hypaphorine, an indole alkaloid secreted by the fungus Pisolithus microcarpus during the formation of ectomycorrhizae with the host plant Eucalyptus globulus, inhibits root hair tip growth. Hypaphorine-induced inh...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-006-0240-9
更新日期：2007-01-01 00:00:00
abstract：:Cell polarity, the asymmetric organization of cellular components along one or multiple axes, is present in most cells. From budding yeast cell polarization induced by pheromone signaling, oocyte polarization at fertilization to polarized epithelia and neuronal cells in multicellular organisms, similar mechanisms are ...
journal_title：Protoplasma
pub_type： 杂志文章,评审
doi：10.1007/s00709-017-1075-2
更新日期：2017-05-01 00:00:00
abstract：:In this study, the filamentous green alga Zygogonium ericetorum (Zygnematales, Chlorophyta), collected at its natural habitat in the high alps, was investigated by light, scanning, and transmission electron microscopy. The field samples were separated into a moist fraction when wetted by splattering water of a nearby ...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-009-0048-5
更新日期：2010-07-01 00:00:00
abstract：:While there is a number of studies on the effects of Rho GTPases on the actin-based cytoskeleton in higher eukaryotes, studies in protozoans are rather limited. The problem seems to be intriguing since the structure of protozoan cytoskeletons is distinct from most vertebrate cells. By blocking endogenous Rho family pr...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-002-0040-9
更新日期：2003-03-01 00:00:00
abstract：:Pollen ontogeny in Pancratium maritimum L. was studied from the sporogenous cell to mature pollen grain stages using transmission electron, scanning electron, and light microscopy to determine whether the pollen development in P. maritimum follows the basic scheme in angiosperms or not. In the course of microsporogene...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-016-0998-3
更新日期：2017-03-01 00:00:00
abstract：:In a typical cell division, chromosomes align at the metaphase plate before anaphase commences. This is not the case in Mesostoma spermatocytes. Throughout prometaphase, the three bivalents persistently oscillate towards and away from either pole, at average speeds of 5-6 μm/min, without ever aligning at a metaphase p...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-018-1214-4
更新日期：2018-07-01 00:00:00
abstract：:The mature apomictic embryo sac of Chondrilla juncea is highly vacuolated and demonstrates a polarization similar to that of the amphimictic gametophyte. The microtubule cytoskeleton of this embryo sac is uncharacteristic and relatively weak. The microtubules are positioned along cell walls and resemble cortical micro...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-006-0147-5
更新日期：2006-05-01 00:00:00
abstract：:By a detailed ontogenetic study of Polemonium caeruleum pollen, tracing each stage of development at high TEM resolution, we aim to understand the establishment of the pollen wall and to unravel the mechanisms underlying sporoderm development. The main steps of exine ontogeny in Polemonium caeruleum, observed in the m...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-017-1121-0
更新日期：2018-01-01 00:00:00
abstract：:Comparative biochemical characterization of class III peroxidase activity tightly bound to the cell walls of maize roots was performed. Ionically bound proteins were solubilized from isolated walls by salt washing, and the remaining covalently bound peroxidases were released, either by enzymatic digestion or by a nove...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-014-0684-2
更新日期：2015-01-01 00:00:00
abstract：:Frost resistance of sprouting Picea abies shoots is insufficient for survival of naturally occurring late frosts. The cellular changes during sprouting appeared to be responsible for frost damage as frost events that damaged sprouting shoots did not damage older needles and stems. Whilst resting buds showed initial fr...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-009-0052-9
更新日期：2010-07-01 00:00:00
abstract：:The morphogenesis of galls occurs by the redifferentiation of cells that assume new functions in the modified host plant organs. The redifferentiated cells in the galls of Nothotrioza myrtoidis on Psidium myrtoides have low complexity metabolism and are photosynthesis-deficient. These galls were studied in search for ...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-014-0709-x
更新日期：2015-03-01 00:00:00
abstract：:Using higher-resolution wide-field computational optical-sectioning fluorescence microscopy, the distribution of antigens recognized by antibodies against animal beta 1 integrin, fibronectin, and vitronectin has been visualized at the outer surface of enzymatically protoplasted onion epidermis cells and in depectinate...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/BF01882029
更新日期：1996-01-01 00:00:00
abstract：:Withanolide is one of the most extensively exploited steroidal lactones, which are biosynthesized in Withania somnifera. Its production from cell suspension culture was analyzed to defeat limitations coupled with its regular supply from the plant organs. In order to optimize the different factors for sustainable produ...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-012-0471-x
更新日期：2013-08-01 00:00:00
abstract：:Marcetia taxifolia (A. St.-Hil.) DC. hosts two gall morphotypes, a pistil-shaped gall induced by a Cecidomyiidae (Diptera) and a fusiform stem gall induced by a Lepidoptera. The cytological study of these galls aimed to answer how the difference in nutritive tissues of Diptera and Lepidoptera galls could be explained ...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-015-0759-8
更新日期：2015-09-01 00:00:00
abstract：:Fruit shape and ripening are major horticultural traits for many fruits and vegetable crops. Changes in fruit shape and ripening are often accomplished by altered cell division or cell expansion patterns. Gibberellic acids (GAs) are essential for tomato fruit development; however, the exact role and the underlying mec...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-019-01471-2
更新日期：2020-05-01 00:00:00
abstract：:To investigate the relationship between nuclear factor Y (NF-Y) and stress tolerance in garlic, we cloned a NF-Y family gene AsNF-YC8 from garlic, which was largely upregulated at dehydrate stage. Expression pattern analyses in garlic revealed that AsNF-YC8 is induced through abscisic acid (ABA) and abiotic stresses, ...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-016-1026-3
更新日期：2017-05-01 00:00:00
abstract：:Plant development is regulated by numerous chemicals derived from a multitude of metabolic pathways. However, we know very little about the biological effects and functions of many of these metabolites in the cell. N-Acylethanolamines (NAEs) are a group of lipid mediators that play important roles in mammalian physiol...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-005-0124-4
更新日期：2005-12-01 00:00:00
abstract：:The potential genotoxicity of Cu(2+) was investigated in Vicia faba and Pisum sativum seedlings in hydroponic culture conditions. Cu(2+) caused a dose-dependent increase in micronuclei frequencies in both plant models. Cytological analysis of root tips cells showed clastogenic and aneugenic effects of this heavy metal...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-008-0004-9
更新日期：2008-11-01 00:00:00
abstract：:Indirect immunofluorescence and confocal microscopy were used to study the nucleation and organization of microtubules during meiosis in two species of leafy liverworts, Cephalozia macrostachya and Telaranea longifolia. This is the first such study of sporogenesis in the largest group of liverworts important as living...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-009-0073-4
更新日期：2009-10-01 00:00:00
abstract：:We discuss models for production of tubulin flux in kinetochore microtubules. Current models concentrate solely on microtubules and their associated motors and enzymes. For example, in some models the driving force for flux is enzymes at the poles and the kinetochores; in others the driving force is motor molecules th...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-008-0286-y
更新日期：2008-01-01 00:00:00
abstract：:Treatment of 14-day-old maize cultivars (Hybrid351 and Giza2) with 250 mM NaCl significantly reduced shoot fresh and dry weights and protein content during the subsequent 12 days. The magnitude of reduction was more pronounced in Giza than Hybrid. Both cultivars contained converging levels of protein for the enzymes p...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-011-0356-4
更新日期：2012-10-01 00:00:00
abstract：:The detergent Brij 58 has been introduced to reverse plasma membrane (PM) vesicles from the right-side-out to the inside-out form. The aim of the present work was to investigate the effect of Brij 58 on the formation of an ATP-dependent proton gradient and on the fluidity of the lipid phase of PM vesicles. PMs of corn...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/BF01289415
更新日期：2001-01-01 00:00:00
abstract：:We used qualitative and quantitative fluorescence microscopy of the fluorescein isothiocyanate-conjugated lectins Concanavalin A, phytohaemagglutinin-erythroagglutinin, pokeweed mitogen, and peanut agglutinin to examine sugar composition on the cell surface and cell-associated mucilage (where present) in a number of c...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-005-0092-8
更新日期：2005-10-01 00:00:00
abstract：:This article deals with the distribution of callose and of the homogalacturonan (HG) epitopes recognized by LM20, JIM5, and 2F4 antibodies in cell walls of differentiating and functioning stomatal complexes of the monocotyledon Zea mays and the dicotyledon Vigna sinensis. The findings revealed that, during stomatal de...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-019-01425-8
更新日期：2020-01-01 00:00:00
abstract：:Pollen development and germination were adversely affected by the presence of mercury, whereas low-concentrations stimulated the whole procedure. Mercury caused morphological anomalies during the tube growth, characterized by irregularly increasing diameters and swelling tips. The main effect was the anomalous cell wa...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-017-1192-y
更新日期：2018-05-01 00:00:00
abstract：:ALTERED MERISTEM PROGRAM 1 (AMP1) encodes a putative glutamate-carboxypeptidase important for plant growth and development. In this study, by comparing the growth of Arabidopsis wild-type, amp1-10 and amp1-13 mutants, and AMP1-GFP/OX2- and AMP1-GFP/OX7-overexpressing seedlings in vitro and in soil, we uncover the role...
journal_title：Protoplasma
pub_type： 杂志文章
doi：10.1007/s00709-019-01458-z
更新日期：2020-03-01 00:00:00
