| Title | Developmental morphology of Acanthophora nayadiformis (Rhodophyta, Ceramiales): sympodial growth and propagule germination |
| Abstract | The A. nayadiformis thallus is peculiar due both to its morphological organization and to the production of specialized vegetative propagules resembling turions of aquatic dicotyledons. Propagules have proved to be useful culture inocula for morphogenetic research. They germinate quickly when cultured under optimal conditions, growing in a polar fashion, producing uprights from their distal buds and axes with rhizoids from the proximal ones. The thallus growth pattern in A. nayadiformis at first involves a monopodial arrangement of determinate branches followed by ramisympodial growth at all thallus level with an unpredictable model. There is not, in fact, a fixed 'sympodial unit' which reiterates itself in the ramisympodia, thus giving rise to great morphological diversity. Both irradiance and temperature have a significant effect on propagule bud growth rate, but not on their developmental morphology. In contrast, changes in the apex morphogenetic trend, such as transformation from the stolon apex into the upright kind and sympodial growth, are promoted by long-day conditions and largely suppressed under short-day regimes. The short-day inhibition of upright growth seems to be a specialized mechanism for over-wintering in a resistant vegetative phase |
| Source | Plant Biosystems (Firenze, Testo stamp.) 139 (2), pp. 189–197 |
| Keywords | Acanthophora nayadiformisCeramialesdaylengthpropaguleseaweed morphology |
| Journal | Plant Biosystems (Firenze, Testo stamp.) |
| Editor | Società Botanica Italiana., Firenze, Italia |
| Year | 2005 |
| Type | Articolo in rivista |
| DOI | 10.1080/11263500500157993 |
| Authors | PERRONE C., CECERE E., DELLE FOGLIE C.I. |
| Text | 6309 2005 10.1080/11263500500157993 ISI Web of Science WOS 000232727800009 Scopus 2 s2.0 25844483747 Acanthophora nayadiformis Ceramiales daylength propagule seaweed morphology Developmental morphology of Acanthophora nayadiformis Rhodophyta, Ceramiales sympodial growth and propagule germination PERRONE C., CECERE E., DELLE FOGLIE C.I. Dipartimento di Biologia e Patologia Vegetale, Universita di Bari, Italia IAMC CNR, Sede di Taranto, Talassografico A. Cerruti , Italia The A. nayadiformis thallus is peculiar due both to its morphological organization and to the production of specialized vegetative propagules resembling turions of aquatic dicotyledons. Propagules have proved to be useful culture inocula for morphogenetic research. They germinate quickly when cultured under optimal conditions, growing in a polar fashion, producing uprights from their distal buds and axes with rhizoids from the proximal ones. The thallus growth pattern in A. nayadiformis at first involves a monopodial arrangement of determinate branches followed by ramisympodial growth at all thallus level with an unpredictable model. There is not, in fact, a fixed sympodial unit which reiterates itself in the ramisympodia, thus giving rise to great morphological diversity. Both irradiance and temperature have a significant effect on propagule bud growth rate, but not on their developmental morphology. In contrast, changes in the apex morphogenetic trend, such as transformation from the stolon apex into the upright kind and sympodial growth, are promoted by long day conditions and largely suppressed under short day regimes. The short day inhibition of upright growth seems to be a specialized mechanism for over wintering in a resistant vegetative phase 139 Developmental morphology of Acanthophora nayadiformis Rhodophyta, Ceramiales sympodial growth and propagule germination PERRONE_2005_Developmental_morphology_of_Acanthophora_nayadiformis_Rhodophyta_Ceramiales_Sympodial_growth_and_propagule_germination.pdf Articolo in rivista Societa Botanica Italiana. 1126 3504 Plant Biosystems Firenze, Testo stamp. Plant Biosystems Firenze, Testo stamp. Plant Biosyst. Firenze, Testo stamp. Plant Biosystems. Firenze, Testo stamp. ester.cecere CECERE ESTER TA.P04.002.001 Fascia Costiera e Ambienti di Transizione analisi strutturale e funzionale delle componenti biotiche ed abiotiche degli ecosistemi per lo sviluppo sostenibile delle attivita |
