Ultrastructure of cell division in the marine red algaLomentaria baileyana

Davis, Elizabeth; Scott, J. Thad

doi:10.1007/bf01281682

Cited by 9 publications

(8 citation statements)

References 16 publications

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“…Instead, in thin section, it consists of two large gaps separated by a central intact fragment of NE. This morphology is similar to that observed in Sarcodiotheca gaudichaudii (Montagne) Gabrielson (unpublished observations) and L. baileyana (Davis & Scott, 1986) except that the gap-like regions in the latter have some scattered membrane. The gaps in all three algae result from prophase invaginations which eventually form complete tunnels in A. subulata and S. gaudichaudii but not L. baileyana.…”

Section: Discussionsupporting

confidence: 66%

“…The extensive PER around the nucleus except at the poles in A. subulata is most similar to the pattem displayed by Lomentaria baileyana (Harvey) Farlow (Rhodymeniales): however, in the latter species, PER often extends for considerable distances into the cytoplasm (Davis & Scott, 1986).…”

Section: Discussionmentioning

confidence: 89%

“…Differences cannot, however, be discounted. Although NAOs have been found in all stages of mitosis in most red algae studied and even in older, non-dividing cells (Scott el al., 1981), several investigations have failed to show them in stages after metaphase (Dave & Godward, 1982;Scott, 1983;Davis & Scott, 1986;Broadwater et aL, 1993). Although it is most likely that NAOs were missed because fewer cells were examined in these stages, their absence may indicate variations in NAO organisation or behaviour.…”

Section: Discussionmentioning

confidence: 99%

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Ultrastructure of cell division inAgardhiella subulata(Gigartinales, Rhodophyta)

Klepacki¹,

Scott²,

Broadwater³

1995

European Journal of Phycology

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The fine structure of cell division in Agardhidla subulata is consistent with the basic pattern observed for most multicellular red algae.Unusual features include complete microtubule-filled tunnels through the nucleus (prophase), a nucleus-associated organelle penetrated by the outer membrane of the nuclear envelope (prophase) and a metaphase-anaphase polar region that appears in thin section as two large gaps separated by a central intact fragment of nuclear envelope. The only other red alga in which the latter two features have been detected is Lomentaria baileyana (Rhodymeniales). This study is the first complete ultrastructural description of cell division in a member of the Gigartinales. In addition, it provides information on features that may be useful as taxonomic indicators for members of the Gigartinales and the Rhodymeniales.

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Section: Discussionsupporting

confidence: 66%

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

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Ultrastructure of cell division inAgardhiella subulata(Gigartinales, Rhodophyta)

Klepacki¹,

Scott²,

Broadwater³

1995

European Journal of Phycology

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“…Although the number of PER cisternae in B. orbigniana is not greater than in some other algae, the elaboration of PER to form long, consistently perpendicular extensions from the poles into the cytoplasm has not been seen in any other alga with the possible exception of Lornentaria baileyana (Davis and Scott 1986). This alga also has extensions of PER, but the orientation of the extensions is variable.…”

Section: Discussionmentioning

confidence: 85%

An ultrastructural study of cell division in the coralline red alga Bossiella orbigniana

Broadwater¹,

Scott²,

Field³

et al. 1993

Can. J. Bot.

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study of cell division in the coralline red alga Bossiella orbigrzia~~a. Can. J. Bot. 71: [434][435][436][437][438][439][440][441][442][443][444][445][446]. This investigation of Bossiella orbigniann (Decaisne) Silva ssp. orbigniann represents the first ultrastructural account of cell division in the order Corallinales. The mitotic process in this alga is differentiated from that of other red algae by a combination of characters. During prometaphase-metaphase the division poles contain unusual membrane arrangements including quantities of smooth-surfaced membranes and elongate extensions of perinuclear rough ER. At anaphase extensive remnants of nucleolar material attach to the chromosomes, trailing them to the poles. After telophase, the distal nucleus continues to move toward the apex resulting in much greater nuclear segregation than accomplished by anaphase alone. Cytokinesis is temporally displaced from mitosis and displaced distally from the metaphase plate. A reevaluation of ultrastructural patterns of red algal cell division suggests that there are two basic types of mitosis, the polar gap type and the polar fenestrations type to which B. orbigniana belongs. These two types are differentiated by a number of characters with the most important being the configuration of the prometaphase-metaphase polar region and spindle origin. study of cell division in the coralline red alga Bossielln orbigniann. Can. J . Bot. 71 : 434-446. Cette recherche sur le Bossiella orbigrliarla (Decaisne) Silva ssp. orbigniana reprCsente le premier compte-rendu sur Les ultrastructures de la division cellulaire pour un membre des Corallinales. Le processus mitotique chez cette algue, se diffkrencie de celui des autres algues rouges par un ensemble de caractkres. Au cours de la promCtaphase-mCtaphase, les p8les de division contiennent des arrangements membranaires incjuant un nombre de membranes B surface lisse et des extensions allon-gCes de rCticulum endoplasmique rugeux pCrinuclCaire. A l'anaphase, de substantiels vestiges de matCriel nuclCaire s'attachent aux chromosomes et les tirent vers les p8les. Aprks la tklophase, le noyau distal continue B migrer jusqu'i l'apex, conduisant B une sCgrCgation nuclCaire beaucoup plus importante que celle rCalisCe en anaphase seulement. La cytocinkse est temporairement dCplacCe de la mitose et dCplacCe distalement par rapport B la plaque rnbtaphasique. Une rCCvaluation des patrons ultrastructuraux de la division cellulaire chez les algues rouges suggkre l'existence de deux types mitotiques de base, le type avec brkche polaire et le type avec fenestrations polaires, a lequel le B. orbigniana appartient. Ces deux types se distinguent par de nombreux caractkres, les plus importants ttant la configuration de la rCgion polaire en promCtaphase-mktaphase, et la rCgion du fuseau achromatique.

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“…Filtered and partially enriched seawater was pumped through a continuous fine spray resulting in high humidity within the house. Samples taken from the blood-red patches were examined with light microscopy and then prepared for transmission electron microscopy using the method of Davis and Scott (1986).…”

Section: A Marinementioning

confidence: 99%

Porphyridium purpureum (Bory) Drew et Ross (Porphyridiales, Rhodophyceae)—first record of a marine unicellular red alga in New Zealand

Nelson

Ryan²

1988

Journal of the Royal Society of New Zealand

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Ultrastructure of cell division in the marine red algaLomentaria baileyana

Cited by 9 publications

References 16 publications

Ultrastructure of cell division inAgardhiella subulata(Gigartinales, Rhodophyta)

Ultrastructure of cell division inAgardhiella subulata(Gigartinales, Rhodophyta)

An ultrastructural study of cell division in the coralline red alga Bossiella orbigniana

Porphyridium purpureum (Bory) Drew et Ross (Porphyridiales, Rhodophyceae)—first record of a marine unicellular red alga in New Zealand

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