摘要
于1989年9－11月分别在中国科学院水生生物研究所和天津轻工部制盐研究所取得盐藻Dunaliellasp.HB558和Dunaliellasalina1009。这两个藻种的光合放氧-光强曲线，光系统Ⅰ、光系统Ⅱ活性-温度曲线及甘油产量的结果表明，其光合作用的光饱和点皆为220μmol／（m2·s），并可忍受40℃的温度；当温度为45℃时，D．sp．HB558的光合放氧明显受到抑制，光系统II活性下降，但对从D.salina1009则无影响;D.sp.HB558在10-40℃下的光合放氧速率及甘油产量都高于D.salina1009.培养这两种蕉的最适温度为30—35℃。
Dunaliella sp. HB558 and Dunaliella salina 1009 were supplied by the Institute of Hydrobiology, Academia Sinica, Wuhan and Salt Research Institute, Tanggu,Tianjin, respectively. The different temperature Photosynthesis light-response curves of Dunaliella were obtained by measurement of O2 evolution using a Clarktype oxy-gen electrode. The effect of temperature on activities of photosystem I and photo-system II as well as the respiratory rate were also detected by the same technique.The light saturation point of photosynthesis in these two species of Dunaliclla,was 220μmol/(m2·s). In both species, the photosynthetic rate increased with tempe-rature up to 40℃. The observed inhibition of photosynthetic oxygen evolution of D.sp. HB 558 (but not of D. salina 1009) by high temperature (45℃) was due to the damage of PS II. The photosynthetic oxygen evolution of D.sp.HB 558 was much higher than that of D. salina 1009 at all experimental temperatures(except 45℃).The glycerol accumulated in cells of D.sp. HB 558 was 172.77 mg/(mg.Chl.)and of D. salina 1009 was only 70.65 mg/(mg.Chl.). The higher glycerol content of D. sp. HB 558 was due to its high photosynthetic capacity. The maximum photo-syntliesis to respiration rations of D. sp. HB 558 and D. talina 1009 were at 35℃(6.76) and 30℃(7.72), respectively. The photosynthetic oxygen evolution at 30℃was 73% (D. sp. HB 558) and 71% (D. salina 1009) of that at 35℃. It is sugges-ted that the optimal temperature for cultivating D.sp. HB 558 and D. salina 1009is 35℃ rather than 30℃.In comparison with D. salina 1009, D.sp. HB 558 showed higher Photosynthetic capacity and glycerol content but lower tolerance to high temperature.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1994年第6期606-611,共6页
Oceanologia Et Limnologia Sinica
基金
中国科学院华南植物研究所所长基金!920350
关键词
盐藻
光饱和点
光合放氧
甘油
光合作用
Dunaliella Light saturation point PS Ⅰ PS Ⅱ Photosynthetic oxygen Glycerol
