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Differential physiological responses of the coastal cyanobacterium Synechococcus sp. PCC7002 to elevated pco2 at lag, exponential,and stationary growth phases

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Science China Earth Sciences 2018年第10期61卷 1397-1405页

作者： Shanli MOU Gang LI Hongmei LI Fazhong LI Zhisheng SHAO Jinsong LI Changfeng QU Yongyu ZHANG Key Laboratory of Biofuels Shandong Provincial Key Laboratory of Energy Genetics Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of SciencesQingdao 266101China Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301 China Zhanjiang Branch of China National Offshore Oil Corporation Ltd. Zhanjiang 524000 China Key Laboratory of Marine Bioactive Substance the First Institute of OceanographyState Oceanic AdministrationQingdao 266061 China

We studied the effects of expected end-of-the-century p CO_2(1000 ppm)on the photosynthetic performance of a coastal marine cyanobacterium Synechococcus ***7002 during the lag,exponential,and stationary growth *** p CO_2significantly stimulated growth,and enhanced the maximum cell density during the stationary *** ambient p CO_2conditions,the lag phase lasted for 6 days,while elevated p CO_2shortened the lag phase to two days and extended the exponential phase by four *** elevated p CO_2increased photosynthesis levels during the lag and exponential phases,but reduced them during the stationary ***,the elevated p CO_2reduced the saturated growth light(Ik)and increased the light utilization efficiency(α)during the exponential and stationary phases,and elevated the phycobilisome:chlorophyll a(Chl a)***,the elevated p CO_2reduced the particulate organic carbon(POC):Chl a and particulate organic nitrogen(PON):Chl a ratios during the lag and stationary phases,but enhanced them during the exponential ***,Synechococcus showed differential physiological responses to elevated p CO_2during different growth phases,thus providing insight into previous studies that focused on only the exponential phase,which may have biased the results relative to the effects of elevated p CO_2in ecology or aquaculture.

关键词： elevated pco2 Lag Exponential and stationary phases Photosynthetic performance Synechococcus

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Impact of elevated pco2 on Mass Flow of Reduced Nitrogen in Trees

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Journal of Integrative Plant Biology 2006年第12期48卷 1385-1390页

作者： Xi-Ping Liu College of Life Sciences of Northwest Sci-Tech University of Agriculture and Forestry 712100 Yangling China Institute of Forest Botany and Tree Physiology University of Freiburg D-79110 Freiburg Germany

To analyze the effects of elevated carbon dioxide concentration （pco2） on the mass flow of reduced nitro- gen （N） in the phloem and xylem of trees, juvenile beech （Fagus sylvatica L.） and spruce （Picea abies （L.） Karst.） were grown in phytotrons and exposed to ambient and elevated pco2 （plus 687.5 mg/m^3 CO2） for three growing seasons. elevated pco2 significantly decreased the mass flow of N from the shoot to roots of beech by significantly reducing the concentration of soluble amino compounds in the phloem, even if the area of conductive phloem of cross-sectional bark tissue was significantly increased, because of less callus deposition in the sieve elements. In spruce, the downward mass flow of reduced N also tended to be decreased, similar to that in beech. Resembling findings in the phloem, N mass flow from roots to shoot in both tree species was significantly diminished owing to significantly reduced concentrations of amino compounds in the xylem and a lower transpiration rate. Therefore, the mass flow of reduced N between shoots and roots of trees was mainly governed by the concentrations of soluble amino compounds in the phloem and xylem in relation to the loading of reduced N in both long-distance transport pathways.

关键词： beech elevated pco2 nitrogen mass flow phloem spruce xylem.

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Relationship between TCM Syndrome Differentiation withGastro-intestinal Function and Abnormal Electrogastrogram inPatients of Chronic Obstructive Pulmonary Diseaseand Pulmonary Heart Disease

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Chinese Journal of Integrative Medicine 1996年第3期2卷 204-206页

作者：胡惠娟连至诚梁雪芬詹锋石胜刚 The Second Affiliated Hospital of Guangzhou Medical College 510260 Guangzhou Institute of Spleen-Stomach Guangzhou University of TCM Guangzhou The Life-Science College of Sun Yat-sen University Guangzhou

ＲｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎＴＣＭＳｙｎｄｒｏｍｅＤｉｆｆｅｒｅｎｔｉａｔｉｏｎｗｉｔｈＧａｓｔｒｏ－ｉｎｔｅｓｔｉｎａｌＦｕｎｃｔｉｏｎａｎｄＡｂｎｏｒｍａｌＥｌｅｃｔｒｏｇａｓｔｒｏｇｒａｍｉｎＰａｔｉ... 详细信息

ＲｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎＴＣＭＳｙｎｄｒｏｍｅＤｉｆｆｅｒｅｎｔｉａｔｉｏｎｗｉｔｈＧａｓｔｒｏ－ｉｎｔｅｓｔｉｎａｌＦｕｎｃｔｉｏｎａｎｄＡｂｎｏｒｍａｌＥｌｅｃｔｒｏｇａｓｔｒｏｇｒａｍｉｎＰａｔｉｅｎｔｓｏｆＣｈｒｏｎｉｃＯｂｓｔ...

关键词： Chronic Obstructive Pulmonary Disease Chronic Obstructive Pulmonary Disease Patient elevated pco2 Compensatory Phase Kidney Deficiency

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