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Giant kelp vegetative propagation : Adventitious holdfast elements rejuvenate senescent individuals of the Macrocystis pyrifera “integrifolia” ecomorph

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2017

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Murúa, Pedro
Patiño, David J.
Westermeier, Renato

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https://doi.org/10.1111/jpy.12493
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Journal of Phycology. 2017, 53(1), pp. 230-234. ISSN 0022-3646. eISSN 1529-8817. Available under: doi: 10.1111/jpy.12493

Zusammenfassung

Recent findings on holdfast development in the giant kelp highlighted its key importance for Macrocystis vegetative propagation. We report here for the first time the development of adventitious holdfasts from Macrocystis stipes. Swellings emerge spontaneously from different areas of the stipes, especially in senescent or creeping individuals. After being manually fastened to solid substrata, these swellings elongated into haptera, which became strongly attached after 1 month. Within 4 months, new thalli increased in size and vitality, and developed reproductive fronds. Our results suggest the usage of these structures for auxiliary attachment techniques. These could act as a backup, when primary holdfasts are weak, and thus improve the survival rate of the giant kelp in natural beds.

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570 Biowissenschaften, Biologie

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ISO 690MURÚA, Pedro, Dieter G. MÜLLER, David J. PATIÑO, Renato WESTERMEIER, 2017. Giant kelp vegetative propagation : Adventitious holdfast elements rejuvenate senescent individuals of the Macrocystis pyrifera “integrifolia” ecomorph. In: Journal of Phycology. 2017, 53(1), pp. 230-234. ISSN 0022-3646. eISSN 1529-8817. Available under: doi: 10.1111/jpy.12493
BibTex
@article{Murua2017-02Giant-38957,
  year={2017},
  doi={10.1111/jpy.12493},
  title={Giant kelp vegetative propagation : Adventitious holdfast elements rejuvenate senescent individuals of the Macrocystis pyrifera “integrifolia” ecomorph},
  number={1},
  volume={53},
  issn={0022-3646},
  journal={Journal of Phycology},
  pages={230--234},
  author={Murúa, Pedro and Müller, Dieter G. and Patiño, David J. and Westermeier, Renato}
}
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    <dcterms:abstract xml:lang="eng">Recent findings on holdfast development in the giant kelp highlighted its key importance for Macrocystis vegetative propagation. We report here for the first time the development of adventitious holdfasts from Macrocystis stipes. Swellings emerge spontaneously from different areas of the stipes, especially in senescent or creeping individuals. After being manually fastened to solid substrata, these swellings elongated into haptera, which became strongly attached after 1 month. Within 4 months, new thalli increased in size and vitality, and developed reproductive fronds. Our results suggest the usage of these structures for auxiliary attachment techniques. These could act as a backup, when primary holdfasts are weak, and thus improve the survival rate of the giant kelp in natural beds.</dcterms:abstract>
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