【摘要】 采用原位光密度法探讨三十烷醇 (TA)、吲哚乙酸 (IAA)和赤霉素 (GA3)对咖啡形双眉藻 (Amphoraacof feaeformis)和盔状舟形藻 (Navichlacorymbosa)生长速率的影响。单因子试验结果表明 ,3种植物生长激素对 2种底栖硅藻生长速率均有显著的促进作用 (P <0 .0 5 )。其中IAA和GA3对 2种底栖硅藻的最佳质量浓度均为 0 .5mg/L ,TA对咖啡形双眉藻的最佳质量浓度为 1.0mg/L ,对盔状舟形藻的最佳质量浓度为 0 .1mg/L。正交多因子试验结果表明 ,培养 2种底栖硅藻的TA、IAA和GA3最佳质量浓度 (mg/L)配比分别为∶咖啡形双眉藻 0 .5∶0 .5∶0 .5 ;盔状舟形藻 0 .1∶0 .5∶1.0。更多还原

【Abstract】 Different concentrations of triacontahol(TA), indole acetic acid (IAA) and gibberellin (GA 3) media were prepared using f/2 basic medium, respectively. Two species of benthic diatoms Amphora coffeaeformis and Navichla corymbosa were treated at water temperature (19.0±0.5) ℃,and light intensity (3 900±100) lx and (2 000±200) lx respectively. The one factor test shows that the three plant growth hormones can enhance the growth of both diatoms significantly (P<0. 05). The optimum concentrations of IAA and GA 3 for both diatoms are 0.5 mg/L,but that of TA for A. coffeaeformis is 1.0 mg/L,and for N. corymbosa is 0.1 mg/L. The orthogonal test results show that the optimum concentration(mg/L) ratios of the three growth hormenes are 0.5 ∶ 0.5 ∶ 0.5 for A.coffeaeformis and 0.1∶0.5∶1.0 for N.coymbosa when the growth rates are 1.165 and 0.853 Divisions/d, respectively.更多还原