Abstract

In farming projects, environmental variations can affect growth, productivity, survival, and fertility, as well as the quality of the produced biomass. This is why estuarine algae could be a good alternative for developing aquaculture ventures in a global climate change scenario since they can develop in highly fluctuating environments with large temperature and salinity fluctuations and low light penetrability. In this study, the best culture conditions (i.e., temperature; nutrients with Provasoli culture medium (PES) and PES + Kelpak®, a commercial biostimulant based on algae; salinity and photon flux) for the growth and fertility of gametophytes and sporophytes of the estuarine alga Punctaria latifolia were evaluated. Gametophytes and sporophytes of P. latifolia showed good tolerance to a wide range of abiotic variables. Under culture conditions, both stages presented the highest growth at intermediate to high temperatures (16—20 °C) and intermediate to high salinity (27.5 – 35 psu). However, gametophytes grew better at intermediate to high nutrient concentrations of PES and PES + Kelpak® and low and high light intensity (5—35 µmol photons m⁻² s⁻¹), whereas sporophytes grew better at intermediate to low nutrients of PES and PES + Kelpak® and low light intensity (5 µmol photons m⁻² s⁻¹). Punctaria latifolia would be a potentially cultivable alternative due to its broad tolerance to unfavorable environmental conditions in the climatic change we face.

中文翻译：

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河口藻 Punctaria latifolia (Phaeophyceae) 在不同非生物培养条件下的表现

摘要

在农业项目中，环境变化会影响生长、生产力、生存和生育力，以及所产生的生物质的质量。这就是为什么河口藻类可能成为在全球气候变化的情况下发展水产养殖企业的一个很好的选择，因为它们可以在温度和盐度波动大以及光穿透性低的高度波动的环境中生长。在这项研究中，研究了配子体和孢子体生长和繁殖的最佳培养条件（即温度；Provasoli 培养基 (PES) 和 PES + Kelpak®（一种基于藻类的商业生物刺激剂）的营养物质；盐度和光子通量）。对河口藻类Punctaria latifolia进行了评估。大叶松的配子体和孢子体对多种非生物变量表现出良好的耐受性。在培养条件下，两个阶段在中高温（16-20°C）和中高盐度（27.5-35 psu）下均表现出最高的生长。然而，配子体在 PES 和 PES + Kelpak® 的中至高营养浓度以及低和高光强度（5—35 µmol 光子 m ⁻²  s ^-1）下生长得更好，而孢子体在 PES 和 PES + Kelpak® 的中至低营养浓度下生长得更好。 PES + Kelpak® 和低光强度（5 µmol 光子 m ⁻²  s ⁻¹）。由于其对我们面临的气候变化中不利环境条件的广泛耐受性，Punctaria latifolia将成为一种潜在的可栽培替代品。