The structure, composition and distribution of proteinaceous crystalloids in vegetative cells of the red algaWrangelia plumosa

Wetherbee, Richard; Janda, Daniel; Bretherton, G. A.

doi:10.1007/bf01287825

Cited by 12 publications

(6 citation statements)

References 5 publications

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“…Nuclear inclusions have often been reported in the animal and plant kingdom alike. In the latter, findings not only concern flowering plants but also extend to Algae (Barton 1967;Wetherbee et al 1984), fungi (Schrantz 1970;Beckett 1976) and Pteridophytae (Mayer 1966;Fabbri & Menicanti 1970).…”

Section: Discussionmentioning

confidence: 98%

A survey on the intraclear inclusions in the Schrophulariaceae and their systematic significance

Bigazzi

1993

Nordic Journal of Botany

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Bigazzi, M. 1993. A survey on the intraclear inclusions in the Schrophulariaceae and their systematic significance. -Nord. J. Bot. 13: 19-31. Copenhagen. ISSN 0107-055x.A survey of nuclear inclusions in chlorenchyma cells is given for 290 taxa of the Scrophulariaceae, covering 72 genera; 172 are new data and the remainder are from previous reports by the author. In addition to the 5 types of nuclear inclusions already determined by their different ultrastructural morphology -amorphous (A), lamellar (L), fibrillar (F), tubular (T), and crystalline ( C ) -and to subtypes C2, three new subtypes -A2, L2, T2 -specific to certain genera or small groups of genera are reported. These new subtypes are described in detail and their distribution in the family discussed. Although the proteinic nature was unquestionably demonstrated, the origin and function of plant nuclear inclusions is far from being understood. In the Scrophulariaceae they have been recognized in 242 out of 290 taxa studied (83.4%), in a total of 60 out of 72 genera (83.3%). O n the basis of the occurrence and qualitative distribution of the nuclear inclusions, the family can be subdivided into four main group: 1) with lamellar inclusions, 2) with amorphous inclusions, 3) with inclusions other than those in the two former groups, and 4) with no nuclear inclusions. The relationship between the distribution on the nuclear inclusions throughout the family and the current systematic arrangement into subfamilies are analyzed and the transfer of some genera to different tribes or to a tribe of their own is proposed, e.g., in the case of Mimulus, Leucocarpus, Halleria, Russelia, Angelonia, Rehmannia, and Campylanthus. Finally, a possible evolutionary trend of the different types of nuclear inclusions based on their structural complexity and on the occurrence in allied families is offered.

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Section: Discussionmentioning

confidence: 98%

A survey on the intraclear inclusions in the Schrophulariaceae and their systematic significance

Bigazzi

1993

Nordic Journal of Botany

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“…The occurrence of crystals in developing carpospores reinforces the idea that crystals might be mobilized and utilized during the developmental stages of sporogenesis (Wetherbee et al, 1984).…”

Section: Discussionmentioning

confidence: 52%

Ultrastructure of carposporogenesis in the red alga Cryptopleura ruprechtiana (Delesseriaceae: Ceramiales: Rhodophyta)

Delivopoulos

2004

J. Mar. Biol. Ass.

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The ultrastructure of carpospore differentiation for the red alga Cryptopleura ruprechtiana is described. Carposporogenesis proceeds through three developmental stages. After cleaving from multinucleate gonimoblast initials the terminal gonimoblast cells differentiate to produce carpospores. These young carpospores possess a large nucleus and numerous proplastids with a peripheral thylakoid. During the later stages of young carpospores starch begins to polymerize. Mucilage is formed within dilating concentric membrane bodies, thus forming mucilage sacs. The latter, subsequently, release their contents initiating carpospore wall formation. Intermediate-aged carpospores have more plastids which develop their internal thylakoid system. The endoplasmic reticulum produces granular cored vesicles. Mature carpospores have numerous fully developed plastids, large floridean starch granules and fibrous vacuoles. Curved dictyosomes produce cored vesicles and adhesive vesicles. The nuclear envelope is crenulated and a two-layered wall surrounds the mature carpospore.

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“…The presence of crystals in the generative gonimoblast cell of Cryptopleura, that are close to the developing carpospores, like the ones in the fusion cell of Gracilaria verrucosa (Huds.) Papenfuss (Delivopoulos and Tsekos, 1985) tends to support the idea that crystals might be mobilized and utilized during the developmental stages of sporogenesis (Wetherbee et al 1984).…”

Section: Discussionmentioning

confidence: 97%

Ultrastructure of auxiliary and gonimoblast cells during carposporophyte development in the red alga Cryptopleura ruprechtiana (Delesseriaceae, Ceramiales, Rhodophyta)

Delivopoulos

2003

Biology of the Cell

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The ultrastructure sequence for the complete post-fertilization development is described in Cryptopleura ruprechtiana (C. Agardh) Kylin, a member of the Delesseriaceae. Following fertilization the diploid nucleus is transferred to the auxiliary cell. This contains typical red algal proplastids, cytoplasmic concentric membranes, numerous small vacuoles and lipid bodies. Crystalline inclusions and virus-like particles are also present. In addition darkly staining spherical masses possibly represent dehydrated haploid chromatin. The multinucleate auxiliary cell produces initially one large gonimoblast initial and subsequently many smaller gonimoblast initials. The first formed generative gonimoblast cell is similar in cellular structure to the auxiliary cell. Gonimoblast initials are uninucleate but through caryokinesis they become multinucleate. They undergo repeated cleavage to form more gonimoblast cells. Subsequent, centripetal cytokinesis results in the formation of clusters of gonimoblast cells. A new type structural cap or association is observed in the septal plugs that interconnect gonimoblast initials. Terminal or generative gonimoblast cells cleave to form additional gonimoblast cells. Only terminal gonimoblast cells are differentiated to carpospores.

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The structure, composition and distribution of proteinaceous crystalloids in vegetative cells of the red algaWrangelia plumosa

Cited by 12 publications

References 5 publications

A survey on the intraclear inclusions in the Schrophulariaceae and their systematic significance

A survey on the intraclear inclusions in the Schrophulariaceae and their systematic significance

Ultrastructure of carposporogenesis in the red alga Cryptopleura ruprechtiana (Delesseriaceae: Ceramiales: Rhodophyta)

Ultrastructure of auxiliary and gonimoblast cells during carposporophyte development in the red alga Cryptopleura ruprechtiana (Delesseriaceae, Ceramiales, Rhodophyta)

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