来自马格伦海峡的两种红色潮间藻类的双胞胎和双胞胎子的温度敏感度差异
Nelso P Navarro1, Jocelyn Jofre2
1Laboratorio de Ecofisiología y Biotecnología de Algas (LEBA), Facultad de Ciencias, Universidad de Magallanes, Punta Arenas, Chile; Network for Extreme Environments Research, NEXER-Universidad de Magallanes, Punta Arenas, Chile; Centro FONDAP de Investigaciones en Ecosistemas Marinos de Altas Latitudes (IDEAL), Valdivia, Chile.
Marine environmental research
|June 26, 2024
概括
海藻子 (四体和肉体) 对温度升高表现出不同的光合作用和生长反应,这对于在波动的潮条件下对招募生存至关重要.
科学领域:
- 海洋生物学 海洋生物学
- 藻类学 藻类学 藻类学
- 生态生理学 生态生理学
背景情况:
- 海藻子释放往往与低潮相吻合,使它们暴露在极端的温度波动中.
- 了解子对温度的反应对于预测海藻种群动态和招募成功至关重要.
研究的目的:
- 在模拟的潮温度上升下,评估两种Gigartinales物种的光合作用反应和平分体 (四分体) 和二分体 (碳体) 子的生长.
- 调查海藻propagules应对热应激的生态生理能力.
主要方法:
- 在实验室条件下,Mazzaella laminarioides和Iridaea cordata的子被暴露在温度梯度 (7-20°C) 中.
- 在温度处理后测量了光合作用反应 (有效量子产量; ΦPSII) 和芽生长率.
主要成果:
- 碳体和四体都表现出对温度升高的各种光合作用反应.
- 在15-20°C时,Mazzaella laminarioides carpospores显示了降低的ΦPSII,而这两种类型的Iridaea cordata子在10-20°C时都很敏感.
- 从预先暴露于更高温度的肉体中的幼苗表现出更高的生长率.
结论:
- 吉加蒂纳莱斯 (Gigartinales) 物种的双体和双体子表现出明显的耐热性和生长策略.
- 这些差异性反应提高了在可变的热制下成功招募和定居人口的潜力.
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