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- W2346297788 abstract "The morphological characteristics, carbon and nitrogen concentrations, stable isotope values and photosynthetic rates of Porphyra yezoensis were studied at the main purple lavers production areas on southwestern coast of Korea. The morphological characteristics of leaf length, leaf width and weight of Porphyra blades were between 11.6~16.3 (average 13.8) cm, 4.6~6.3 (average 5.4) cm, 1.1~2.6 (average 1.86) g DW m-2, respectively. Photosynthetic pigment of Chl a concentration of Porphyra blades was between 2.18~17.77 (average 9.65) mg DW Chl a m-2. Carbon and nitrogen concentrations of Porphyra blades was between 201~317 (average 240) mg DW g-1, 39.8~50.0 (average 43.5) mg DW g-1 and C/N ratio 5.0~6.7 (average 5.5). The range of average δ13C and δ15N values of Porphyra blades was between - 25.6 to - 24.0 (average - 24.7)‰ for δ13C, and 1.3 to 4.1 (average 2.1)‰ for δ15N. Photosynthetic characteristics of seaweeds measured by pulse amplitude modulation (PAM) fluorometry was used as an indicator of photosynthetic activity. We use Diving-PAM fluorometry to examine photosynthetic rates of the seaweeds Porphyra yezoensis at each station. Maximum quantum yield of Porphyra blades was between 0.46~ 0.55 (average 0.52), the variance of the effective PS II maximum quantum yield of the station was broadly similar. Maximum relative electron transport rate (rETRmax) of Porphyra blades was between 4.71~5.84 (average 5.33) μmol electrons m-2 s-1, the changes of maximum relative electron transport rate (rETRmax) of Porphyra yezoensis were similar to those of PS II maximum quantum yield. Photosynthetic efficiency (α) was between 0.027~0.045 (average 0.036). Minimum saturating irradiance (Ek) range was 139~180 (average 156) μmol photons m-2 s-1. Minimum saturating irradiance (Ek) made a difference by station within the area on southwestern coast. Carbon and nitrogen concentrations and photosynthetic rates of Porphyra blades production areas on southwestern coast were broadly similar. The photosynthetic characteristics showed low photosynthetic rates because the low maximum quantum yields and low maximum relative electron transport rate." @default.
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- W2346297788 date "2012-09-30" @default.
- W2346297788 modified "2023-09-24" @default.
- W2346297788 title "남서해역에서 양식되는 방사무늬김(Porphyra yezoensis Ueda)의 Diving-PAM에 의한 광합성 특성" @default.
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