无藻满江红(Anabena-free Azolla)和满江红鱼腥藻(Anabaena azollae)重建共生体

切除满江红大孢子果顶端漏斗状膜和囊群盖,可彻底清除大孢子果内所含的鱼腥藻,并发育成无藻满江红。移植囊群盖于种内或种间去顶孢子果,成功地得到了重组的共生体。“新组合满江红”经扫描电子显微镜观察、固氮酶活性测定和体内鱼腥藻单克隆抗体鉴定,得以证实。其重建机率为10％。接种人工培养的鱼腥藻于无藻满江红上,发现有不完全共生现象存在。本文对萍藻交换的条件及其在满江红研究和应用前景,做了简要的讨论。     

市售廉价珍珠粉的探究分析报告

1问题的提出2010年9月19日,央视《每周质量报告》再次揭露行业潜规则:使用贝壳粉冒充珍珠粉在珍珠产地已经是公开的秘密。我们走访了很多商店和超市,发现有很多廉价的珍珠粉售卖,价格都在每包(250g)10元以下,还有不少是5元以下的。我们对这些廉价珍珠粉的质量表示怀疑,通过掌握的化     

RE-ESTABLISHMENT OF SYMBIOSIS TO Anabaena-FREE Azolla

Symbiosis to Anabaena-free Azolla has been re-established by placing indusium containing Anabaena onto the Anabaena-free megasporocarps. Anabaena-free megasporocarps were obtained by removing the indusium and the apical membrane of the megaspore apparatus of normal Azolla. The recovery of symbiosis in artificially reconstituted Azolla-Anabaena association was confirmed using the scanning electron microscope, monoclonal antibody test (McAb-C_(16)), and nitrogen fixation capacity (ARA).Laboratory-grown Anabaena azollae cells inoculated subsequently to the decapitated megaspore apparatus were observed to have entered the leaf cavities of sporophyte, although some portions of Anabaena filaments were found outside the leaf cavity. Plants invaded by artificially inoculated Anabaena did not have sufficient N_2-fixing activity to allow the growth in the N-free medium.