Regulation of gametogenesis and zoosporogenesis in Ulva linza (Chlorophyta): comparison with Ulva mutabilis and potential for laboratory culture
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Regulation of gametogenesis and zoosporogenesis in Ulva linza (Chlorophyta): comparison with Ulva mutabilis and potential for laboratory culture
Green Ulvophyte macroalgae represent attractive model systems for understanding growth, development, and evolution. They are untapped resources for food, fuel, and high-value compounds, but can also form nuisance blooms. To fully analyze green seaweed morphogenesis, controlled laboratory-based culture of these organisms is required. To date, only a single Ulvophyte species, Ulva mutabilis Føyn,...
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Among the chlorophycean algae the members of the family Ulvaceae are characterized by a multicellular structure and a haplo-diplontic life-cycle that proceeds without formation of special generative organs. The transformation in these algae of ordinary vegetative cells into generative ones producing either gametes mitotically or zoospores meiotically was a major reason for introducing Ulva muta...
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The green marine macroalgae of the class Ulvophyceae (Ulvophytes) are common algae distributed worldwide particularly in intertidal areas, which play a key role in aquatic ecosystems. They are potentially valuable resources for food, animal feed and fuel but can also cause massive nuisance blooms. Members of Ulvaceae, like many other seaweeds, harbour a rich diversity of epiphytic bacteria with...
متن کاملPhysiological and Biochemical Responses of Ulva prolifera and Ulva linza to Cadmium Stress
Responses of Ulva prolifera and Ulva linza to Cd(2+) stress were studied. We found that the relative growth rate (RGR), Fv/Fm, and actual photochemical efficiency of PSII (Yield) of two Ulvaspecies were decreased under Cd(2+) treatments, and these reductions were greater in U. prolifera than in U. linza. U. prolifera accumulated more cadmium than U. linza under Cd(2+) stress. While U. linza sho...
متن کاملUltrastructure of meiosis and centriole behaviour in Ulva mutabilis Foyn.
The present work deals with the ultrastructure of the meiotic processes leading to the formation of zoospores. The formation of an exit pore on the outer surface of the sporangium is the first visible sign that the cell will undergo meiosis and not just a somatic division. Prophase I nuclei differ from nuclei in mitotic prophase by having one or several invaginations of the nuclear membrane. El...
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ژورنال
عنوان ژورنال: Frontiers in Plant Science
سال: 2015
ISSN: 1664-462X
DOI: 10.3389/fpls.2015.00015