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- Title
LIFE HISTORIES IN THE PHYLLOPHORACEAE (RHODOPHYTA: GIGARTINALES) FROM THE PACIFIC COAST OF NORTH AMERICA. I. GYMNOGONGRUS LINEARIS AND G. LEPTOPHYLLUS.
- Authors
DeCew, Thomas C.; West, John A.
- Abstract
Carpospores of Gymnogongrus linearis (C. Ag.) J. Ag. Collected from Sonoma C., California were cultured and gave rise to crustose plants. Tetrasporogenesis could not be induced. However, tetraspores from field-collected crustose tetrasporophytes found near G. linearis from San Mateo Co., California were cultured. These field crusts superficially resemble Petrocelis middendorffii (Ruprecht) Kjellman, but differ in size, color, number of tetrasporangia per filament, and distal dichotomous branching of the perithallial filaments. Tetraspores gave rise to upright plants identical to G. linearis. Gymnogongrus leptophyllus J. Ag. Collected from California and Baja California, Mexico were found as narrow and wide forms, Narrow form isolates recycled directly without producing a crustose tetrasporophyte. These are interpreted as apogamous. Carpospores of the wide form grew into crusts resembling Petrocelis (=Erythrodermis) haematis Hollenberg. Tetrasporogenesis was induced in culture by abrasion or dehydration. Tetraspores from field-collected crusts and laboratory cultured tetrasporophytes grew into plants identical to G. leptophyllus, completing a sexual life history with an alternation of heteromorphic generations.
- Subjects
RED algae; PHYLLOPHORACEAE; GIGARTINALES; PLANTS; LIFE history theory
- Publication
Journal of Phycology, 1981, Vol 17, Issue 3, p240
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/j.0022-3646.1981.00240.x