Pyropia yezoensis can utilize CO2 in the air during moderate dehydration
Pyropia yezoensis can utilize CO2 in the air during moderate dehydration
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DOI：
10.1007/s00343-014-3093-7
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发表时间：
2014-03
影响因子：
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通讯作者：
W. Zhou;Linwen He;Fang Yang;A. Lin;Baoyu Zhang;J. Niu;Guangce Wang
中科院分区：
文献类型：
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作者：
W. Zhou;Linwen He;Fang Yang;A. Lin;Baoyu Zhang;J. Niu;Guangce Wang
条斑甲藻是一种潮间带海藻，随着潮汐的变化，它会经历有规律的脱水和再水合。在本研究中，P.研究了高、低CO2浓度（（600-700）×10 - 6和（40 - 80）×10 - 6，分别命名为第Ⅰ组和第Ⅱ组）下的Yezoensito脱水和再水化。在绝对含水量为71%时，第I组菌体的有效光系统II量子产率显著高于第II组菌体。在100%和71%AWC条件下，藻体形态、总Rubisco活性和总蛋白含量差异不大，这可能是适度脱水条件下藻体光合作用正常进行的基础。在低CO2浓度下，藻体在适度脱水过程中表现出较高的光系统I量子产率，这可能是由于循环电子流增强所致.这些结果表明P.在适度脱水过程中，虾夷扇贝可以直接利用环境空气中的CO2。
Pyropia yezoensis, an intertidal seaweed, experiences regular dehydration and rehydration with the tides. In this study, the responses ofP. yezoensisto dehydration and rehydration under high and low CO2concentrations ((600–700)×10−6and (40−80)×10−6, named Group I and Group II respectively) were investigated. The thalli of Group I had a significantly higher effective photosystem II quantum yield than the thalli of Group II at 71% absolute water content (AWC). There was little difference between thalli morphology, total Rubisco activity and total protein content at 100% and 71% AWC, which might be the basis for the normal performance of photosynthesis during moderate dehydration. A higher effective photosystem I quantum yield was observed in the thalli subjected to a low CO2concentration during moderate dehydration, which might be caused by the enhancement of cyclic electron flow. These results suggested thatP. yezoensiscan directly utilize CO2in ambient air during moderate dehydration.