摘要： 以Gunnera/Nostoc共生体为材料，研究、比较了碳水化合物和H2对其固氮活力及呼吸速率影响，结果表明；在正常条件下，外源H2可提Gunnera/Nostoc共生体固氮活力近100%,却使其呼吸速率下降近50%;而碳水化合物葡萄糖）也可使其固氮活力提高约100%,并使其呼吸速率提高近160%.表明碳水化合物及H2均可为Gunnera/Nostoc.共生体提供固氮过程的还原力。由于HZ的循环利用降低了呼吸速率，所以就间接地节约Gunnera/Nostoc共生体固氮过程中对碳水化合物的消耗。结果还表明，碳水化合物葡萄糖）对恢复饥饿后的Gunnera/Nostoc共生体固氮活力的作用优于外源H2.
关键词:
生物固氮Gunnera/Nostoc,
固氮共生体,
固氮活力,
碳水化合物,
H2
Abstract: The work was carried out in New Zealand from 1989-1991.The results showedthat exogenous H2 increased nitrogen fixing activity of Gunnera/Nostoc symbiont by nearly 100%, but decreased respiratory rate by nearly 50% simultaneously.Exogenous carbohydrateglucose) increased nitrogen fixing activity by nearly 100%, and increased respiratory rate bynearly 160% simultaneously. It also showed that carbohydrate glucose) was much betterthan H2 in maintaining and restoring nitrogen fixing activity ofGunnera/Nostoc symbiont.
Key words:
Biological nitrogen fixation,
Gunnera/Nostoc symbiont,
Nitrogen fixing activity,
Carbohydrate,
Hydrogen
中图分类号:
荷辉民, 王澜芳, 蒋家慧, 梁永平. 碳水化合物和H2对Gunnera/Nostoc共生体固氮活力的影响[J]. 华北农学报, 1994, 9(4): 1-6. doi: 10.3321/j.issn:1000-7091.1994.04.001.
Man Huimin. Effect of Carbohydrate and Hydrogen on Nitrogen一fixingActivity of Gunnera/Nostoc Symbiont[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1994, 9(4): 1-6. doi: 10.3321/j.issn:1000-7091.1994.04.001.