Uptake of Organic Phosphorus by Arbuscular Mycorrhizal Red Clover

The capacities of two arbuscular mycorrhizal (AM) fungi, Glomusmosseae and Glomus versiforme, to mineralize added organic P werestudied in a sterilized clacareous soil. Mycorrhizal (inoculated witheither of the AM fungi) and non-mycorrhizal red clover (Trifoliumpratense L.) plants were grown for eight weeks in pots with upperroot, central hyphal and lower soil compartments. The hyphal and soilcompartments received either organic P (as Na-phytte) or inorganic P(as KH_2PO_4) at the rate of 50 mg P kg^-1. No P was added to theroot compartments.

杨梅树混合接种VA菌根菌和弗兰克氏菌的生长效应

将VA菌根菌和弗兰克氏菌混合接种于杨梅,研究两者的互作关系及其对杨梅生长发育的促进效应。结果表明,VA菌根菌与弗兰克氏菌之间存在协同效应,混合接种可以显著促进杨梅苗期的生长。进一步研究混合接种对杨梅早期营养生长和生殖生长的影响表明,混合接种能同时促进杨梅果树的营养生长与生殖生长,而且越早接种效果越明显。其中,以当年生幼苗进行混合接种的效果最佳,种植第4年开始结果,第6年进入盛果期,平均单株产量达33.66 kg,平均单果重达25.24 g,分别比对照(未接种)提高26.85%、21.89%。

In vitro GROWTH AND PRODUCTION OF "VEGETATIVE SPORES" OF VA MYCORRHIZAL FUNGUS——Glomus sinensis

The growth of vesicular-arbuscular mycorrhizal(VAM) fungi in pure culture in the absence of host tissue is an important problem which greatly limits the deeper studies on taxonomy, genetics and physiology of this group of fungi and their application in crop produc-