The role of seasonality in reproduction of multiannual delayed gametophytes ofSaccharina latissima

• DOI: 10.1111/jpy.13191
• Publication Date: 2021-06-24T06:06:00Z
• Authors: Alexander P. J. E...; Ronald Pierik; Gregory S. Fivash; Nienke C. J. van ...; Tjeerd J. Bouma; Jacco C. Kromkamp; Klaas Timmermans
• Keywords: Sporophyte; Light intensity

Delayed gametophytes are able to grow vegetatively for prolonged periods of time. As such, they potentially very valuable kelp aquaculture given their great promise in opening up novel opportunities breeding and farming. However, large‐scale application would require more in‐depth understanding how control reproduction delayed gametophytes. For newly formed gametophytes, many environmental factors have been identified, with key drivers being light intensity, temperature, the initial gametophyte density. question whether react similarly these life cycle controls remains open exploration. In this study, we performed a full factorial experiment on influences density multiannual Saccharina latissima , during which number sporophytes was counted. We demonstrate that S. can reliably reproduce sexually after than year vegetative growth, depending effects between intensity temperature. Under higher intensities (≥29 µmol photons · m −2 s −1 ), optimal observed at lower temperatures (10.2°C), while (≤15 (≥12.6°C). Given seasonal lag solar radiation sea surface temperature natural systems, conditions resemble those found spring (i.e., increasing low temperatures) autumn decreasing temperatures). Seasonality be used as an tool better