caa a22 4500 378854097 CHVBK 20180305123330.0 cr unu---uuuuu 161128e20030905xx s 000 0 eng 10.1515/BOT.2003.042 doi (NATIONALLICENCE)gruyter-10.1515/BOT.2003.042 The Life History of Lophothamnion hirtum (Hook. f. et Harv.) Womersley (Rhodophyta, Ceramiaceae) from Southern New Zealand [Elektronische Daten] [J. Mei, D. R. Schiel] Lophothamnion hirtum is one of the most abundant red seaweeds on intertidal platforms in southern New Zealand. It forms distinct small patches scattered among large brown algae at mid and lower tidal levels from May (autumn) to November (spring), but isolated plants can be found in all months except mid-summer (February). This study describes its life history, which was previously unreported. Samples of Lophothamnion hirtum were collected monthly from field sites and examined microscopically. Laboratory cultures were grown for 4-5 months. L. hirtum does not show a Polysiphonia-type life history typically found amongst members of Ceramiales, either in culture or in its natural environment. Polyspores give rise to polysporophytes. No individual functional gametophytes were found. Plants bearing polysporangia, in addition to male and female gametophytes, occurred both in culture and in the field, and from such plants infertile carpospores were produced. Throughout the life of the plants in the field, regenerative cells grew mainly from lower determinate branches and such regenerative cells developed into whole plants. Photoperiod and temperature affected the development of regenerative cells in culture. These developed fastest at 24 h of daylight. Detached branchlets possessed rhizoidal filaments and had the ability to attach to substrata and regenerate. The vegetative reproduction of regenerative cells and detached branchlets clearly help in the dispersal and generational propagation of this species. Copyright © 2003 by Walter de Gruyter GmbH & Co. KG Hydrobiology nationallicence Mycology, fungi nationallicence Botany & plant sciences nationallicence Mei J. aut Schiel D. R. aut Botanica Marina Walter de Gruyter 46/5(2003-09-05), 425-430 0006-8055 46:5<425 2003 46 botm https://doi.org/10.1515/BOT.2003.042 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/BOT.2003.042 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mei J. aut NATIONALLICENCE 700 1- Schiel D. R. aut NATIONALLICENCE 773 0- Botanica Marina Walter de Gruyter 46/5(2003-09-05), 425-430 0006-8055 46:5<425 2003 46 botm CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter