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Obtaining spores for the production of Saccharina latissima: seasonal limitations in nature, and induction of sporogenesis in darkness

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Obtaining spores for the production of Saccharina latissima : seasonal limitations in nature, and induction of sporogenesis in darkness. / Boderskov, Teis; Rasmussen, Michael Bo; Bruhn, Annette.

In: Journal of Applied Phycology, Vol. 33, No. 2, 04.2021, p. 1035-1046.

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@article{3734f20b32d04c789ecf6477f0215409,
title = "Obtaining spores for the production of Saccharina latissima: seasonal limitations in nature, and induction of sporogenesis in darkness",
abstract = "When cultivating the kelp Saccharina latissima, knowledge on the availability of seeding material for the production is essential. Applying a spore seeding approach requires spores from the reproductive organs of the fertile sporophytes (sori). As sori are generally not present during the time of seeding in late summer, the production of spores (sporogenesis) can be artificially induced by removing the meristematic part of the sporophyte and keeping the sporophyte under short day, temperate, and nutrient-replete conditions. Only limited information is available on the effect of light intensities including darkness on the sporogenesis of S. latissima. This study examined the natural pattern of sporogenesis in S. latissima from Middelfart, Denmark, and the effect of four different light regimes (0, 20, 60, or 120 μmol photons m −2 s −1) on the artificial induction of sporogenesis in S. latissima. Natural reproductivity and availability of spores in Denmark peaked in early winter, with 86% of the population being reproductive in November. Reproductive material was available from October until late spring, but with a variable spore release from 11 × 10 3 to 1.2 × 10 6 spores cm −2 sori. The artificial induction of sporogenesis was optimal in darkness with > 90% of sporophytes developing sori after 49 days, with an average spore release density of 1.15 ± 0.38 × 10 6 spores cm −2 sori. The results confirmed that S. latissima in Denmark follows the general pattern of reproduction of S. latissima in North Atlantic regions and demonstrated for the first time that sporogenesis in S. latissima can be efficiently induced in darkness. ",
keywords = "Cultivation, Light intensity, Maturation, Organic cultivation, Phaeophyceae, Sori, Sugar kelp",
author = "Teis Boderskov and Rasmussen, {Michael Bo} and Annette Bruhn",
year = "2021",
month = apr,
doi = "10.1007/s10811-020-02357-0",
language = "English",
volume = "33",
pages = "1035--1046",
journal = "Journal of Applied Phycology",
issn = "0921-8971",
publisher = "Springer",
number = "2",

}

RIS

TY - JOUR

T1 - Obtaining spores for the production of Saccharina latissima

T2 - seasonal limitations in nature, and induction of sporogenesis in darkness

AU - Boderskov, Teis

AU - Rasmussen, Michael Bo

AU - Bruhn, Annette

PY - 2021/4

Y1 - 2021/4

N2 - When cultivating the kelp Saccharina latissima, knowledge on the availability of seeding material for the production is essential. Applying a spore seeding approach requires spores from the reproductive organs of the fertile sporophytes (sori). As sori are generally not present during the time of seeding in late summer, the production of spores (sporogenesis) can be artificially induced by removing the meristematic part of the sporophyte and keeping the sporophyte under short day, temperate, and nutrient-replete conditions. Only limited information is available on the effect of light intensities including darkness on the sporogenesis of S. latissima. This study examined the natural pattern of sporogenesis in S. latissima from Middelfart, Denmark, and the effect of four different light regimes (0, 20, 60, or 120 μmol photons m −2 s −1) on the artificial induction of sporogenesis in S. latissima. Natural reproductivity and availability of spores in Denmark peaked in early winter, with 86% of the population being reproductive in November. Reproductive material was available from October until late spring, but with a variable spore release from 11 × 10 3 to 1.2 × 10 6 spores cm −2 sori. The artificial induction of sporogenesis was optimal in darkness with > 90% of sporophytes developing sori after 49 days, with an average spore release density of 1.15 ± 0.38 × 10 6 spores cm −2 sori. The results confirmed that S. latissima in Denmark follows the general pattern of reproduction of S. latissima in North Atlantic regions and demonstrated for the first time that sporogenesis in S. latissima can be efficiently induced in darkness.

AB - When cultivating the kelp Saccharina latissima, knowledge on the availability of seeding material for the production is essential. Applying a spore seeding approach requires spores from the reproductive organs of the fertile sporophytes (sori). As sori are generally not present during the time of seeding in late summer, the production of spores (sporogenesis) can be artificially induced by removing the meristematic part of the sporophyte and keeping the sporophyte under short day, temperate, and nutrient-replete conditions. Only limited information is available on the effect of light intensities including darkness on the sporogenesis of S. latissima. This study examined the natural pattern of sporogenesis in S. latissima from Middelfart, Denmark, and the effect of four different light regimes (0, 20, 60, or 120 μmol photons m −2 s −1) on the artificial induction of sporogenesis in S. latissima. Natural reproductivity and availability of spores in Denmark peaked in early winter, with 86% of the population being reproductive in November. Reproductive material was available from October until late spring, but with a variable spore release from 11 × 10 3 to 1.2 × 10 6 spores cm −2 sori. The artificial induction of sporogenesis was optimal in darkness with > 90% of sporophytes developing sori after 49 days, with an average spore release density of 1.15 ± 0.38 × 10 6 spores cm −2 sori. The results confirmed that S. latissima in Denmark follows the general pattern of reproduction of S. latissima in North Atlantic regions and demonstrated for the first time that sporogenesis in S. latissima can be efficiently induced in darkness.

KW - Cultivation

KW - Light intensity

KW - Maturation

KW - Organic cultivation

KW - Phaeophyceae

KW - Sori

KW - Sugar kelp

UR - http://www.scopus.com/inward/record.url?scp=85099479092&partnerID=8YFLogxK

U2 - 10.1007/s10811-020-02357-0

DO - 10.1007/s10811-020-02357-0

M3 - Journal article

VL - 33

SP - 1035

EP - 1046

JO - Journal of Applied Phycology

JF - Journal of Applied Phycology

SN - 0921-8971

IS - 2

ER -