Morphogenesis in<i>Pterocladiella capillacea</i>(<i>Rhodophyta, Gelidiales</i>): bud differentiation in relation to irradiance-temperature combinations

Felicini, Gianni P.; Bottalico, A.; Fanelli, Margherita

doi:10.1080/11263500212331351169

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…According to Dixon (1958), plagiotropic differentiation of thallus in Pterocladiella capillacea may occur under unfavorable ecological conditions. In laboratory cultures, such a morphogenetic pattern has been triggered by irradiances lower than 10 mmol photons m -2 s -1 (Felicini 1970, Felicini andPerrone 1994) and regulated by temperatures higher than 188C (Felicini et al 2002), conditions occurring at site 1 in summer. Under constant low light intensity, upright morphogenesis seemed to be controlled by a strong apical dominance, giving them the typical appearance of etiolated plants.…”

Section: Discussionmentioning

confidence: 99%

“…Pterocladiella capillacea from southeastern Italy has been subjected to numerous studies (Felicini and Arrigoni 1967, Calabrese and Felicini 1970, Felicini 1970, 1992, 1993, Felicini and Perrone 1972, 1986, some of which demonstrated that in lab-cultures thallus morphogenesis is strongly affected by light intensity, with irradiances lower than 10 mmol photons m -2 s -1 giving rise to long, narrow, scarcely branched thalli (Felicini et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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

Bottalico¹,

Foglie²,

Fanelli³

2008

Botm

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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

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Bottalico¹,

Foglie²,

Fanelli³

2008

Botm

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“…As in other macroalgal species, morphogenetic trends to a stoloniferous growth in the unattached A. nayadiformis might be caused by both exogenous and endogenous factors. Nutrient deficiency, low light intensity, and low water exchange, that frequently occur inside the algal mats, have also proved to be responsible for stoloniferous growth in cultured Pterocladiella capillacea (S.G. Gmelin) Santelices & Hommersand (Felicini et al, 2002). Among the endogenous factors, a loss or a reversal of thallus polarity could be caused by the lack of a fixed orientation.…”

Section: Discussionmentioning

confidence: 99%

How the unattached form of Acanthophora nayadiformis (Rhodophyta: Ceramiales) produces storage and perennating organs

2007

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In the Mar Piccolo of Taranto (southern Italy, Mediterranean Sea), an enclosed basin with lagoonal features, Acanthophora nayadiformis is one of the major components of the free-living seaweed community to which the related attached population does not contribute consistently. Loose thalli of A. nayadiformis exhibit morphological features very different from those of the attached specimens and possess a peculiar vegetative cycle including an overwintering phase. Free-living morphs are characterized by monopodial stoloniferous growth; in contrast, both determinate and indeterminate branching as well as the typical ramisympodial growth pattern of the species are lacking. In autumn, free-living thalli fragment giving rise to stolon pieces which undergo deep structural changes in their sub-apical parts including both storage of floridean starch and extensive cortical thickening. Soon afterwards the uncorticated parts decay, whilst the modified fragments are able to overwinter and give rise to new fronds during next spring.

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Fragmentation of thalli and secondary attachment of fragments of the agarophyte Gelidium lingulatum (Rhodophyta, Gelidiales)

et al. 2018

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Morphogenesis inPterocladiella capillacea(Rhodophyta, Gelidiales): bud differentiation in relation to irradiance-temperature combinations

Cited by 8 publications

References 23 publications

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

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

How the unattached form of Acanthophora nayadiformis (Rhodophyta: Ceramiales) produces storage and perennating organs

Fragmentation of thalli and secondary attachment of fragments of the agarophyte Gelidium lingulatum (Rhodophyta, Gelidiales)

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