[en] This study focused on two types of nuclear bodies visible in plant cells that were previously thought to be similar to the coiled bodies (CBs) of animal cells: the nucleolus-associated body (NAB) and dense body (DB). We show that both NABs and DBs share common features with animal CBs: they consist of ribonucleoproteins, are silver-stainable, and lack DNA. Immunoelectron microscopy shows that only the NABs are rich in snRNAs and fibrillarin, two markers characteristic of animal CBs. This suggests that NABs rather than DBs are the plant counterparts of the CBs of animal cells. These structures appear most frequently in cells blocked in G0-1, their frequency gradually declining with resumption of the cell cycle and nucleolar activity. During this reactivation period, NABs are released from the nucleolus to the nucleoplasm, suggesting that they may act as nuclear transport or sorting structures.
Alliegro MC, Alliegro MA (1998) Protein heterogeneity in the coiled body compartment. Exp Cell Res 239:60-68
Barlow PW (1981) Argyrophilic nuclear structures in root apices. In: Brouwer R et al. (eds) Structure and function of plant roots. Nijhoff Junk, the Hague Boston London, pp 43-47
Barlow PW (1983) Changes in the frequency of two types of nuclear body during the interphase of meristematic plant cells. Protoplasma 118:104-113
Bendayan M (1984) Protein A-gold electron microscopic immunocytochemistry: methods, applications and limitations. J Electron Microsc Technol 1:243-270
Beven AF, Simpson GG, Brown JWS, Shaw PJ (1995) The organization of spliceosomal components in the nuclei of higher plants. J Cell Sci 108:509-518
Beven AF, Lee R, Razaz M, Leader DJ, Brown JWS, Shaw PJ (1996) The organization of ribosomal RNA processing correlates with the distribution of nucleolar snRNAs. J Cell Sci 109:21241-1251
Bohmann K, Ferreira J, Santana N, Weis K, Lamond AI (1995) Molecular analysis of the coiled body. J Cell Sci Suppl 19:107-113
Burglen MJ (1974) Quelques précisions techniques concernant l'emploi de la coloration régressive à l'EDTA. J Microscopie 21:193-196
Carmo-Fonseca M, Pepperkok R, Carvalmo MT, Lamond AI (1992) Transcription-dependent colocalization of the U1, U2, U4/U6 and U5 snRNPs in coiled bodies. J Cell Biol 117:1-14
Chamberland H, Lafontaine JG (1993) Localisation of snRNPs antigens in nucleolus-associated bodies: study of plant interphase nuclei by confocal and electron microscopy. Chromosoma 102:220-226
Christensen ME, Moloo J, Swischuk JL, Schelling ME (1986) Characterisation of the nucleolar protein, B-36, using monoclonal antibodies. Exp Cell Res 166:77-93
Cottignies A, Jennane A (1988) Water content, water potential, and transition from the non-cycling to the cycling state in the pea cotyledonary bud. J Plant Physiol 132:1-4
Frey MR, Matera AG (1995) Coiled bodies contain U7 small nuclear RNA and associate with specific DNA sequences in interphase human cells. Proc Natl Acad Sci USA 92:5915-5919
Gall JG, Tsvetkov A, Wu Z, Murphy C (1995) Is the sphere organelle/coiled body a universal nuclear component? Dev Genet 16:25-35
Guiltinan MJ, Schelling ME, Ehteshaw NZ, Thomas JC, Christensen JC (1988) The nucleolar RNA-binding protein B-36 is highly conserved among plants. Eur J Cell Biol 46:547-553
Gulemetova R, Chamberland H, Gugg S, Plante M, Lafontaine JG (1998) Presence of small-nuclear-ribonucleoprotein-containing nuclear bodies in quiescent and early germinating Zea mays embryos. Protoplasma 202:192-201
Isaac G, Yang Y, Meier UT (1998) Nopp 140 functions as a molecular links between the nucleolus and the coiled bodies. J Cell Biol 142:319-329
Jennane A, Landre P, Nougarède A (1987a) Nucleolus activation in pea cotyledonary buds during 24 hours after decapitation of the main stem: cytochemical studies. Protoplasma 136:29-36
Jennane A, Landre P, Nougarède A (1987b) Water content and physiological state of the cotyledonary bud of the pea. J Plant Physiol 127:493-498
Jimenez-Garcia LF, Segura-Valdez MD, Ochs RL, Rothblum LI, Hannan R, Spector DL (1994) Nucleogenesis: U3 RNA snRNA-containing prenucleolar bodies move to sites of active pre-rRNA transcription after mitosis. Mol Biol Cell 5:955-966
Jordan P, Cunha C, Carmo-Fonseca M (1997) The cdk7-cyclin H-MAT1 complex associated with TFIIH is localized in coiled bodies. Mol Biol Cell 8:1207-1217
Lafarga M, Andrès MA, Berciano MT, Maquiera E (1991) Organization of nucleoli and nuclear bodies in osmotically stimulated supraoptic neurons of the rat. J Comp Neurol 308:329-339
Lafontaine JG, Chamberland H (1995) Relationship of nucleolus-associated bodies with the nucleolar organiser tracks in plant interphase nuclei (Pisum sativum). Chromosoma 103:545-553
Lamond AI, Earnshaw WC (1998) Structure and function in the nucleus. Science 280:547-553
Lyon CE, Bohmann K, Sleeman J, Lamond AI (1997) Inhibition of protein dephosphorylation results in accumulation of splicing snRNPs and coiled bodies within the nucleolus. Exp Cell Res 230:84-93
Matera AG, Ward DC (1993) Nucleoplasmic organization of snRNPs in cultured human cells. J Cell Biol 121:715-727
Meier UT, Blobel G (1994) NAP57, a mammalian nucleolar protein with a putative homolog in yeast and bacteria. J Cell Biol 127: 1505-1514
Mineur P, Jennane A, Thiry M, Deltour R, Goessens G (1999) Ultrastructural distribution of DNA within the meristematic cell nucleolus of plants during the reactivation and the subsequent inactivation by a cold stress. J Struct Biol 123:199-210
Monneron A, Bernhard W (1969) Fine structural organization of the interphase cell nucleus of some mammalian cells. J Ultrastruct Res 27:266-288
Moreno Diaz de la Espina S, Sanchez-Pina MA, Risueno MC, Medina FJ, Fernandez-Gomez WE (1980) The role of plant coiled bodies in the nuclear RNA metabolism. Electron Microsc 2: 240-241
Nougarède A, Rondet P (1975) Synthèse et utilisation de l'amidon dans les axillaires du Pisum sativum L. (var. nain hâtif d'Annonay), après la levée de dominance apicale. Rev Cyt Biol Végét 38:197-215
Nougarède A, Rembur J, Rondet P (1981) Réactivation du bourgeon cotylédonaire du pois en réponse à la kinétine. Can J Bot 59:590-603
Nougarède A, Landre P, Rembur J (1983) Activités ATPasiques du nœud cotylédonaire et du bourgeon cotylédonaire du pois inhibé réactivé ou soumis à la fusicoccine. Can J Bot 61:119-134
Nougarède A, Rondet P, Rembur J (1987) Effet d'un traitement par l'acide abscissique sur la division cellulaire, les teneurs en ADN et l'élongation du bourgeon cotylédonaire des plants de pois décapités. Can J Bot 65:907-915
Nougarède A, Landre P, Jennane A (1990) Intranucleolar visualization of nucleic acids and acidic proteins in inhibited and reactivated pea cotyledonary buds. Protoplasma 156:183-191
Ochs RL, Stein TW, Tan EM (1994) Coiled bodies in the nucleolus of breast cancer cells. J Cell Sci 107:385-399
Olmedilla A, Alché JD, Rodriguez-Garcia MI (1997) Nucleolar evolution and coiled bodies during meiotic prophase in Olea europaea: differential localisation of nucleic acids. Eur J Cell Biol 74:181-189
Ploton D, Ménager M, Adnet JJ (1984) Simultaneous high resolution localisation of Ag-NOR proteins and nucleoproteins in interphasic and mitotic nuclei. Histochem J 16:897-906
Potashkin JA, Derby RJ, Spector D (1990) Differential distribution of factors involved in pre-mRNA processing in the yeast cell nucleus. Mol Cell Biol 10:3524-3534
Ramon y Cajal S (1903) Un sencillo método de coloracion del reticulo protoplasmico y sus efectos en los diversos organos nerviosos. Trab Lab Invest Biol 2:129-221
Raska I, Andrade LEC, Ochs RL, Chan EKL, Roos G, Tan EM (1991) Immunological and ultrastructural studies of the nuclear body with autoimmune antibodies. Exp Cell Res 195:27-37
Risueno MC, Medina FJ (1986) The nucleolar structure in plant cell. Cell Biol Rev 7:1-140
Shaw PJ, Beven AF, Leader DJ, Brown JWS (1998) Localisation and processing from a polycistronic precursor of novel SnoRNAs in maize. J Cell Sci 111:2121-2128
Simpson GG, Filipowicz W (1996) Splicing of precursors to mRNA in higher plants: mechanism, regulation and sub-nuclear organisation of the spliceosomal machinery. Plant Mol Biol 32:1-41
Spector DL, Fu XD, Maniatis T (1991) Associations between distinct pre-mRNA splicing components and the cell nucleus. EMBO J 10:3467-3481
Spector DL, Lark G, Huang S (1992) Differences in snRNP localization between transformed and nontransformed cells. Mol Biol Cell 3:555-569
Testillano PS, Sanchez-Pina MA, Lopez-Iglesias C, Olmedilla A, Christensen ME, Risueno MC (1992) Distribution of B-36 nucleolar protein in relation to transcriptional activity in plant cells. Chromosoma 102:41-49
Thiry M (1992) Highly sensitive immunodetection of DNA on sections with exogenous terminal deoxynucleotidyl transferase and non-isotopic nucleotide analogues. J Histochem Cytochem 40: 411-419
Thiry M (1994) Cytochemical and immunocytochemical study of coiled bodies in different cultured cell lines. Chromosoma 103:268-276
Toupiol D (1976) Mise en place de l'inhibition du bourgeon cotylédonaire chez le Pisum sativum L. Etude morphologique et cytophotométrique. C R Acad Sci Série D 282:281-283
Vandelaer M, Thiry M (1998) The phosphoprotein pp135 is an essential constituent of the fibrillar components of nucleoli and of coiled bodies. Histochem Cell Biol 110:169-177
Wassef B, Burglen J, Bernhard W (1979) A new method for visualization of preribosomal granules in the nucleolus after acetylation. Biol Cell 34:153-158
Weibel ER (1969) Stereological principles for morphometry in electron microscopic cytology. Int Rev Cytol 26:235-302
Williams LM, Charest P, Fitzgerald GJ, Lafontaine JG (1985) A comparison of nuclease-gold and protease-gold complex labelling over the nucleolus and nuclear bodies of Pisum sativum root tip cells. Biol Cell 54:65-72