摘要
在极大螺旋藻(S.maxima)和钝顶螺旋藻(S.platensis)不同生长阶段进行硒胁迫处理,分别从接种后第1d至第5d开始添加硒,并不断增加硒含量,至第7d使硒的累计添加量为1000 mg·L^(-1),形成5种不同硒胁迫(硒胁迫Ⅰ～Ⅴ),观察各种硒胁迫下螺旋藻的生物量及对无机硒的生物有机化的影响。结果表明:硒胁迫Ⅰ～Ⅳ对两种螺旋藻的生长影响不明显,而硒胁迫Ⅴ对螺旋藻生长有明显促进作用;藻体含硒总量和螺旋藻对无机硒的有机化率按硒胁迫Ⅰ～Ⅴ依次增加。首次提出硒胁迫强度概念,并用此较好地解释了有关实验结果。
Se stress in S. maxima and S. platensis at different growing phases was studied. Adding Se started from the 1st day to the 5th day and Se concentration increased every day. The cumulating Se concentration at the 7th day was 1000mg·L^(-1)(stress of Se Ⅰ～Ⅴ). The growth of Spirulina, the absorption and bio-organization of Se were also discussed. It was indicated that the stress of Se Ⅰ～Ⅳ showed no significant effect; and the stress of Se Ⅴ showed obvious promotion. The total Se content and bio-organization rate of Se increased from Ⅰ to Ⅴ, The results were first explained by the stress intensity of Se.
出处
《生态科学》
CSCD
2003年第4期305-309,共5页
Ecological Science
基金
教育部重点课题(01141)
广州市科委基金(2001-J-010-01)
关键词
钝顶螺旋藻
生长阶段
极大螺旋藻
硒胁迫
生物有机化
S. maxima
S. platensis
Growing phases
Stress intensity of Se
Bio-organization of Se
