Growth and reproductive phenology of Pterocladiella capillacea (Rhodophyta: Gelidiales) from the southern Adriatic Sea

Abstract

Growth, external morphology and reproductive phenology of a southern Adriatic population of Pterocladiella capillacea from a marine cave were investigated. Production of new uprights from creeping axes was limited to late autumn-winter; upright growth in length and branching order increase reached their maxima in late summer. Tetrasporic fronds were dominant from June to September, with a peak in July, while cystocarpic uprights were rather rare and recorded in August only. Two stable, distinct morphotypes occurred in this population at two sampling sites exposed to different daily photon irradiances. Uprights from the more illuminated site were regularly pinnate, with numerous closely packed lateral branches, representing the best-known phenotype of the species; in contrast, uprights from the more shaded inner site had very long and narrow axes, greater intervals between first-order branches and lower branching order. Statistical analysis demonstrated that upright growth in length and branching was significantly different at the two sites; upright biomass in the more illuminated site was generally higher because of the higher orders of branching

Polysaccharides of the red algae 'Pterocladia' growing on the Lebanese coast: Isolation, structural features with antioxidant and anticoagulant activities

“…Red algae of the genus Pterocladia are used for industrial production of gelling galactans and are commonly distributed in the seas of Lebanon, Egypt, Brazil, Italy and other countries (Wassef et al, 2002;Silva et al, 2010;Bottalico et al, 2008). Previous researches have discussed the composition and the properties of polysaccharides from the red algae Pterocladia capillacea.…”

Reproductive phenology of three species of Gelidiales (Rhodophyta) in two macroalgal communities from Tenerife (Atlantic Ocean, Canary Islands, Spain)

“…A different degree of deviation from the balanced haploid:diploid ratio is often observed and tetrasporophytes have been described as several orders of magnitude more frequent than gametophytes, the sexual phases being completely absent in some cases (Akatsuka, 1986;Santelices, 1988;Santos & Duarte, 1996;Bottalico & al., 2008). The unequal distribution of tetrasporophytes and gametophytes was explained by physiological differences between the two phases (Santelices, 1990), although indicated that physiological characteristics were not responsible for the scarcity of gametophytes in the populations of G. canariense of Gran Canaria (Canary Islands).…”

Evaluation of Seaweeds Ulva rigida and Pterocladia capillaceaas Dietary Supplements in Nile Tilapia Fingerlings

“…Also, many researchers have studied the composition and the properties of polysaccharides from the red algae Pterocladia capillacea. Pterocladia as a red algae genus is used for industrial production of gelling galactans and is commonly distributed in the seas of Lebanon, Egypt, Brazil, Italy and other countries [16,17].…”