Cultivation of the brown alga Hizikia fusiformis (Harvey) Okamura: controlled fertilization and early development of seedlings in raceway tanks in ambient light and temperature

Early development of the filamentous brown alga Ectocarpus siliculosus (Dillwyn) Lyngbye involves two cell types that are arranged in a polymorphic, but constrained, pattern. The present study aimed to decipher the cellular processes responsible for the establishment of this pattern. Thorough observations characterised five different events of division and differentiation that occurred during the early development. The hypothesis that a local control is responsible for these processes was tested. To do so, Ectomat, a stochastic automaton in which each cell only interacts with its closest neighbour(s), was created. The probabilities for the five events were adjusted to fit to the observations. Simulations with Ectomat reconstructed most of the essential properties of the sporophyte development, in terms of cell-type proportion, relative position and growth dynamics. The whole organism properties emerged by applying local transition rules. In conclusion, no global position information system was required at this development stage. Randomly occurring cell events, driven by simple contact interactions, are sufficient to account for the early filament development and establishment of the cell-type pattern of E. siliculosus.

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A novel thyroglobulin-binding lectin from the brown alga Hizikia fusiformis and its antioxidant activities

Food Chemistry ◽

10.1016/j.foodchem.2016.01.061 ◽

2016 ◽

Vol 201 ◽

pp. 7-13 ◽

Cited By ~ 8

Author(s):

Mingjiang Wu ◽

Changqing Tong ◽

Yue Wu ◽

Shuai Liu ◽

Wei Li

Keyword(s):

Brown Alga ◽

Antioxidant Activities ◽

Hizikia Fusiformis ◽

Binding Lectin

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Sexual reproduction, life history, and early development in culture of the Antarctic brown alga Himantothallus grandifolius (Desmarestiales, Phaeophyceae)*

Phycologia ◽

10.2216/i0031-8884-29-1-9.1 ◽

1990 ◽

Vol 29 (1) ◽

pp. 9-18 ◽

Cited By ~ 26

Author(s):

C. Wiencke ◽

M. N. Clayton

Keyword(s):

Life History ◽

Sexual Reproduction ◽

Early Development ◽

Brown Alga ◽

The Antarctic

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EARLY DEVELOPMENT OF THE BROWN ALGA FUCUS EVANESCENS (PHAEOPHYCEAE, FUCALES) FROM SOUTHEAST KAMCHATKA UNDER LABORATORY-CONTROLLED CONDITIONS

Bulletin оf Kamchatka State Technical University ◽

10.17217/2079-0333-2016-37-50-56 ◽

2016 ◽

pp. 50-56 ◽

Cited By ~ 1

Author(s):

A.V. Klimova ◽

◽

A.N. Kashutin ◽

Keyword(s):

Early Development ◽

Brown Alga ◽

Fucus Evanescens ◽

Controlled Conditions

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Effects of the secondary metabolites from Canistrocarpus cervicornis (Dictyotales, Phaeophyceae) on fertilization and early development of the sea urchin Lytechinus variegatus

Latin American Journal of Aquatic Research ◽

10.3856/vol41-issue2-fulltext-8 ◽

2017 ◽

Vol 41 (2) ◽

pp. 296-304

Author(s):

Fredy A. Ortiz-Ramírez ◽

Magui Aparecida Vallim ◽

Diana Negrão Cavalcanti ◽

Valéria Laneuville Teixeira

Keyword(s):

Natural Products ◽

Secondary Metabolites ◽

Early Development ◽

Sea Urchin ◽

Brown Alga ◽

Marine Organisms ◽

Lytechinus Variegatus ◽

Male And Female ◽

Canistrocarpus Cervicornis ◽

Marine Brown Alga

Marine organisms are rich sources of natural products that, among other activities, help to maintain the species equilibrium. Samples of the marine brown alga Canistrocarpus cervicornis (Kützing) De Paula & De Clerck were collected in Búzios, Rio de Janeiro, Brazil, in June 2006. The extract was obtained in CH2Cl2 and subjected to fractionation by chromatographic methods in order to isolate and purify the compound (4R, 7R, 14S)-4α, 7α-diacethoxy-14-hydroxydolastane-1(15), 8-dien. Then, the effects of the extract and the dolastane diterpene on zygotes and gametes of the sea urchin Lytechinus variegatus were evaluated. The exposure of male and female gametes to the C. cervicornis extract promoted, respectively, a reduction of 10-30% in fertilization and a 20 to 70% decrease in the number of eggs. Furthermore, the exposure of zygotes to the extract inhibited their development up to 86.7 ± 1.6% (at a concentration of 250 µg mL-1), as well as generating abnormalities in 39-50% of zygotes. The results of the dolastane diterpene showed no evidence of inhibition in the zygotes’ development, thought it was proved to induce anomalies. At higher concentrations (25 and 50 µg mL-1), it was possible to observe cell lyses.

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Individual differences, social attention, and the history of the social motivation hypotheses of autism

Behavioral and Brain Sciences ◽

10.1017/s0140525x18002509 ◽

2019 ◽

Vol 42 ◽

Author(s):

Peter C. Mundy

Keyword(s):

Individual Differences ◽

Early Development ◽

Emotional Development ◽

Social Motivation ◽

Social Attention ◽

Social Emotional Development ◽

Social Emotional ◽

Precise Understanding ◽

The Social ◽

History Of

Abstract The stereotype of people with autism as unresponsive or uninterested in other people was prominent in the 1980s. However, this view of autism has steadily given way to recognition of important individual differences in the social-emotional development of affected people and a more precise understanding of the possible role social motivation has in their early development.

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