Involvement of microtubules in rhizoid differentiation of Spirogyra species.


:Some species of Spirogyra form rosette-shaped or rod-shaped rhizoids in the terminal cell of the filaments. In the present study, we analyzed an involvement of microtubules (MTs) in rhizoid differentiation. Before rhizoid differentiation, cortical MTs were arranged transversely to the long axis of cylindrical cells, reflecting the diffuse growth. At the beginning of rhizoid differentiation, MTs were absent from the extreme tip of the terminal cell. In the other area of the cell, however, MTs were arranged transversely to the long axis of the cell. In the fully differentiated rosette-shaped rhizoid, MTs were randomly organized. However, at a younger stage of rosette-shaped rhizoids, MTs were sometimes arranged almost transversely in the lobes of the rosette. In the rod-shaped rhizoid, MTs were arranged almost transversely. MT-destabilizing drugs (oryzalin and propyzamide) induced swelling of rhizoids, and neither rosette-shaped nor rod-shaped rhizoids were formed. The role of MTs in rhizoid differentiation was discussed.






Yoshida K,Inoue N,Sonobe S,Shimmen T




Has Abstract


2003-06-01 00:00:00












  • Plasma membrane-cell wall connections: roles in mitosis and cytokinesis revealed by plasmolysis of Tradescantia virginiana leaf epidermal cells.

    abstract::Tradescantia virginiana leaf epidermal cells were plasmolysed by sequential treatment with 0.8 M and 0.3 M sucrose. Plasmolysis revealed adhesion of the plasma membrane to the cell wall at sites coinciding with cytoskeletal arrays involved in the polarisation of cells undergoing asymmetric divisions--cortical actin pa...


    pub_type: 杂志文章


    authors: Cleary AL

    更新日期:2001-01-01 00:00:00

  • Distinct chromatin environment associated with phosphorylated H3S10 histone during pollen mitosis I in orchids.

    abstract::Pollen developmental pathway in plants involving synchronized transferal of cellular divisions from meiosis (microsporogenesis) to mitosis (pollen mitosis I/II) eventually offers a unique "meiosis-mitosis shift" at pollen mitosis I. Since the cell type (haploid microspore) and fate of pollen mitosis I differ from typi...


    pub_type: 杂志文章


    authors: Sharma SK,Yamamoto M,Mukai Y

    更新日期:2017-01-01 00:00:00

  • Differential effects of two phospholipase D inhibitors, 1-butanol and N-acylethanolamine, on in vivo cytoskeletal organization and Arabidopsis seedling growth.

    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...


    pub_type: 杂志文章


    authors: Motes CM,Pechter P,Yoo CM,Wang YS,Chapman KD,Blancaflor EB

    更新日期:2005-12-01 00:00:00

  • Interactive effects of silicon and arbuscular mycorrhiza in modulating ascorbate-glutathione cycle and antioxidant scavenging capacity in differentially salt-tolerant Cicer arietinum L. genotypes subjected to long-term salinity.

    abstract::Salinity is the major environmental constraint that affects legume productivity by inducing oxidative stress. Individually, both silicon (Si) nutrition and mycorrhization have been reported to alleviate salt stress. However, the mechanisms adopted by both in mediating stress responses are poorly understood. Thus, pot ...


    pub_type: 杂志文章


    authors: Garg N,Bhandari P

    更新日期:2016-09-01 00:00:00

  • Responses of Trapa natans L. floating laminae to high concentrations of manganese.

    abstract::The present study focuses on the responses of floating laminae of the Mn-tolerant hydrophyte Trapa natans L. to 1 mM Mn and their ability to accumulate the metal. Studies were carried out first on young floating laminae belonging to the second verticil of 30-day-old plants which originated from fruits that had been ma...


    pub_type: 杂志文章


    authors: Baldisserotto C,Ferroni L,Anfuso E,Pagnoni A,Fasulo MP,Pancaldi S

    更新日期:2007-01-01 00:00:00

  • Biocompatibility of different nanostructured TiO2 scaffolds and their potential for urologic applications.

    abstract::Despite great efforts in tissue engineering of the ureter, urinary bladder, and urethra, further research is needed in order to improve the patient's quality of life and minimize the economic burden of different lower urinary tract disorders. The nanostructured titanium dioxide (TiO2) scaffolds have a wide range of cl...


    pub_type: 杂志文章


    authors: Imani R,Pazoki M,Zupančič D,Kreft ME,Kralj-Iglič V,Veranič P,Iglič A

    更新日期:2016-11-01 00:00:00

  • A possible role for C4 photosynthetic enzymes in tolerance of Zea mays to NaCl.

    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...


    pub_type: 杂志文章


    authors: Alla MM,Hassan NM

    更新日期:2012-10-01 00:00:00

  • The formation, function and fate of protein storage compartments in seeds.

    abstract::Seed storage proteins (SSPs) have been studied for more than 250 years because of their nutritional value and their impact on the use of grain in food processing. More recently, the use of seeds for the production of recombinant proteins has rekindled interest in the behavior of SSPs and the question how they are able...


    pub_type: 杂志文章


    authors: Ibl V,Stoger E

    更新日期:2012-04-01 00:00:00

  • Use of energy-filtering transmission electron microscopy for routine ultrastructural analysis of high-pressure-frozen or chemically fixed plant cells.

    abstract::In the present study energy-filtering transmission electron microscopy by use of an in-column spectrometer is employed as a powerful tool for ultrastructural analysis of plant cells. Images of unstained very thin (50 nm) and thick (140 nm) sections of the unicellular green alga Micrasterias denticulata, as a model sys...


    pub_type: 杂志文章


    authors: Lütz-Meindl U,Aichinger N

    更新日期:2004-06-01 00:00:00

  • The durum wheat plasma membrane Na+/H+ antiporter SOS1 is involved in oxidative stress response.

    abstract::We have shown previously that the durum wheat TdSOS1 excludes Na+ and Li+ ions outside cells. Moreover, this protein is activated by Arabidopsis kinase SOS2 through phosphorylation. The elimination of both SOS2 phosphorylation sites and the auto-inhibitory domain produces a hyperactive TdSOS1∆972 form, which have a ma...


    pub_type: 杂志文章


    authors: Feki K,Tounsi S,Masmoudi K,Brini F

    更新日期:2017-07-01 00:00:00

  • Ultrastructural aspects of pollen ontogeny in an endangered plant species, Pancratium maritimum L. (Amaryllidaceae).

    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...


    pub_type: 杂志文章


    authors: Tütüncü Konyar S

    更新日期:2017-03-01 00:00:00

  • Localization of sesquiterpene lactone biosynthesis in cells of capitate glandular trichomes of Helianthus annuus (Asteraceae).

    abstract::Capitate glandular trichomes (CGT) of sunflower, Helianthus annuus, synthesize bioactive sesquiterpene lactones (STLs) within a short period of only a few days during trichome development. In the current project, the subcellular localization of H. annuus germacrene A monooxygenase (HaGAO), a key enzyme of the STL bios...


    pub_type: 杂志文章


    authors: Amrehn E,Aschenbrenner AK,Heller A,Spring O

    更新日期:2016-03-01 00:00:00

  • Pre-meiotic bands and novel meiotic spindle ontogeny in quadrilobed sporocytes of leafy liverworts (Jungermannidae, Bryophyta).

    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...


    pub_type: 杂志文章


    authors: Brown RC,Lemmon BE

    更新日期:2009-10-01 00:00:00

  • Symplasmic transport and phloem loading in gymnosperm leaves.

    abstract::Despite more than 130 years of research, phloem loading is far from being understood in gymnosperms. In part this is due to the special architecture of their leaves. They differ from angiosperm leaves among others by having a transfusion tissue between bundle sheath and the axial vascular elements. This article review...


    pub_type: 杂志文章,评审


    authors: Liesche J,Martens HJ,Schulz A

    更新日期:2011-01-01 00:00:00

  • Immunolocalization of alpha-keratins and associated beta-proteins in lizard epidermis shows that acidic keratins mix with basic keratin-associated beta-proteins.

    abstract::The differentiation of the corneous layers of lizard epidermis has been analyzed by ultrastructural immunocytochemistry using specific antibodies against alpha-keratins and keratin associated beta-proteins (KAbetaPs, formerly indicated as beta-keratins). Both beta-cells and alpha-cells of the corneous layer derive fro...


    pub_type: 杂志文章


    authors: Alibardi L

    更新日期:2014-07-01 00:00:00

  • Plasmolysis effects and osmotic potential of two phylogenetically distinct alpine strains of Klebsormidium (Streptophyta).

    abstract::The osmotic potential and effects of plasmolysis were investigated in two different Klebsormidium strains from alpine habitats by incubation in 300-2,000 (3,000) mM sorbitol. Several members of this genus were previously found to tolerate desiccation in the vegetative state yet information was lacking on the osmotic p...


    pub_type: 杂志文章


    authors: Kaplan F,Lewis LA,Wastian J,Holzinger A

    更新日期:2012-07-01 00:00:00

  • Arabidopsis petiole torsions induced by lateral light or externally supplied auxin require microtubule-associated TORTIFOLIA1/SPIRAL2.

    abstract::Although rather inconspicuous, movements are an important adaptive trait of plants. Consequently, light- or gravity-induced movements leading to organ bending have been studied intensively. In the field, however, plant movements often result in organ twisting rather than bending. This study investigates the mechanism ...


    pub_type: 杂志文章


    authors: Borchers A,Deckena M,Buschmann H

    更新日期:2018-09-01 00:00:00

  • Study on programmed cell death and dynamic changes of starch accumulation in pericarp cells of Triticum aestivum L.

    abstract::Features of programmed cell death (PCD) and dynamic changes of starch accumulation in developing pericarp cells of wheat (Triticum aestivum L.) were observed and analyzed by periodic acid-Schiff/toluidine blue O double staining, fluorescence staining, terminal deoxynucleotidyl transferase-mediated fluorescein deoxyuri...


    pub_type: 杂志文章


    authors: Zhou Z,Wang L,Li J,Song X,Yang C

    更新日期:2009-07-01 00:00:00

  • Cytochalasin B affects the structural polarity of statocytes from cress roots (Lepidium sativum L.).

    abstract::The effect of cytochalasin B (CB; 25 micrograms ml-1 in 1% dimethylsulfoxide, DMSO) upon the structural polarity of statocytes in cress roots is demonstrated. If normal, vertically grown roots are incubated in CB, the structural polarity of the statocytes is altered according to the developmental stage of the root. St...


    pub_type: 杂志文章


    authors: Hensel W

    更新日期:1985-01-01 00:00:00

  • Contribution of the actomyosin motor to the temperature-dependent translational diffusion of water by cytoplasmic streaming in Elodea canadensis cells.

    abstract::The extent to which the actomyosin motor responsible for cytoplasmic streaming contributes to the translational diffusion of water in Elodea canadensis cells was studied by a nuclear magnetic resonance (NMR) spin-echo technique. The relative contribution of the actomyosin motor was determined from the corresponding ap...


    pub_type: 杂志文章


    authors: Vorob'ev VN,Anisimov AV,Dautova NR

    更新日期:2004-12-01 00:00:00

  • Inflorescence and flower development in the Hedychieae (Zingiberaceae): Hedychium coccineum Smith.

    abstract::The inflorescence of Hedychium coccineum Smith is thyrse, and the primary bracts are initiated in a spiral phyllotactic pattern on the sides of the inflorescence dome. Cincinnus primordia are initiated on the flank of the inflorescence apex, in the axils of primary bracts. This primordium subsequently develops a bract...


    pub_type: 杂志文章


    authors: Kong JJ,Xia YM,Li QJ

    更新日期:2010-11-01 00:00:00

  • Effect of mercury on pollen germination and tube growth in Lilium longiflorum.

    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...


    pub_type: 杂志文章


    authors: Sawidis T,Baycu G,Cevahir-Öz G,Weryszko-Chmielewska E

    更新日期:2018-05-01 00:00:00

  • Protective effect of glutamine on the main and adjacent organs damaged by ischemia-reperfusion in rats.

    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...


    pub_type: 杂志文章


    authors: Hartmann RM,Licks F,Schemitt EG,Colares JR,do Couto Soares M,Zabot GP,Fillmann HS,Marroni NP

    更新日期:2017-11-01 00:00:00

  • Mitotic inheritance of endoplasmic reticulum in the primitive red alga Cyanidioschyzon merolae.

    abstract::Endoplasmic reticulum (ER) is a major site for secretory protein folding and lipid synthesis. Since ER cannot be synthesized de novo, it must be inherited during the cell cycle. Studying ER inheritance can however be difficult because the ER of typical plant and animal cells is morphologically complex. Therefore, our ...


    pub_type: 杂志文章


    authors: Yagisawa F,Fujiwara T,Kuroiwa H,Nishida K,Imoto Y,Kuroiwa T

    更新日期:2012-10-01 00:00:00

  • The nature and features of organization of reserve polysaccharides in three Pelomyxa species (Archamoebea, Pelobiontida).

    abstract::The nature and features of organization of reserve polysaccharides in three species of the genus Pelomyxa-P. palustris, P. belevskii, and P. stagnalis-were studied using light and transmission electron microscopy. We applied the periodic acid-Schiff reaction that is a highly selective method for detecting glycogen. Th...


    pub_type: 杂志文章


    authors: Chistyakova L,Bezborodkina N,Berdieva M,Radaev A,Goodkov A

    更新日期:2020-11-01 00:00:00

  • Physiological characteristics and metabolomics of transgenic wheat containing the maize C4 phosphoenolpyruvate carboxylase (PEPC) gene under high temperature stress.

    abstract::In this paper, two transgenic wheat lines, PC27 and PC51, containing the maize PEPC gene and its wild-type (WT) were used as experimental material to study the effects of high temperature on their photosynthetic physiological characteristics and metabolome. The results showed that transgenic wheat lines had higher pho...


    pub_type: 杂志文章


    authors: Qi X,Xu W,Zhang J,Guo R,Zhao M,Hu L,Wang H,Dong H,Li Y

    更新日期:2017-03-01 00:00:00

  • Comparison between the effects of fusicoccin, Tunicamycin, and Brefeldin A on programmed cell death of cultured sycamore (Acer pseudoplatanus L.) cells.

    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 ...


    pub_type: 杂志文章


    authors: Malerba M,Cerana R,Crosti P

    更新日期:2004-10-01 00:00:00

  • Unusual developmental morphology and anatomy of vegetative organs in Utricularia dichotoma-leaf, shoot and root dynamics.

    abstract::The terrestrial carnivorous species Utricularia dichotoma is known for a great phenotypic plasticity and unusual vegetative organs. Our investigation on 22 sources/populations revealed that after initiation of a leaf and two bladders on a stolon, a bud was formed in the proximal axil of the leaf, developing into a ros...


    pub_type: 杂志文章


    authors: Reut MS,Płachno BJ

    更新日期:2020-03-01 00:00:00

  • Subnucleolar location of fibrillarin and NopA64 in Lepidium sativum root meristematic cells is changed in altered gravity.

    abstract::Fibrillarin and the plant nucleolin homolog NopA64 are two important nucleolar proteins involved in pre-rRNA processing. In order to determine the effects of the altered gravity environment on the nucleolus, we have investigated the location of fibrillarin and NopA64 in nucleolar subcomponents of cress (Lepidium sativ...


    pub_type: 杂志文章


    authors: Sobol M,Gonzalez-Camacho F,Rodríguez-Vilariño V,Kordyum E,Medina FJ

    更新日期:2006-09-01 00:00:00

  • Macromolecular differentiation of Golgi stacks in root tips of Arabidopsis and Nicotiana seedlings as visualized in high pressure frozen and freeze-substituted samples.

    abstract::The plant root tip represents a fascinating model system for studying changes in Golgi stack architecture associated with the developmental progression of meristematic cells to gravity sensing columella cells, and finally to "young" and "old", polysaccharide-slime secreting peripheral cells. To this end we have used ...


    pub_type: 杂志文章


    authors: Staehelin LA,Giddings TH Jr,Kiss JZ,Sack FD

    更新日期:1990-01-01 00:00:00