High water temperature tolerance in photosynthetic activity of Zostera japonica Ascherson & Graebner seedlings from Ago Bay, Mie Prefecture, central Japan
作者： Mahiko Abe , Keigo Yokota , Akira Kurashima , Miyuki Maegawa
DOI: 10.1007/S12562-009-0141-X
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摘要: Photosynthetic activity of Zostera japonica seedlings was measured using a gas volumeter at 0 and 6 days in culture under eight light (0–800 μmol photons/m2/s) ten water temperature conditions (5–35°C). Seedlings from Ago Bay, Mie Prefecture were cultured incubators accurately controlled each test for 1 week. After 1 week, maximum gross photosynthesis (P maxg) appeared 29°C most 30–35°C bleached withered. At the same time, compensation point (I c) increased only 30°C during period. As result, upper critical survival Z. japonica seedlings, which agrees well with that southern boundary around Japanese coast. It is necessary to monitor this species as bio-indicator seawater warming.
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