Investigation for functionalities of rhizo-biocomplex to minimize highly adverse conditions in association with organic sink in the rhizosphere and its utilization in agricultural use

我们调查了根生物系统，使减轻不利的土壤在加里曼丹，印度尼西亚。从生长在中强酸性泥炭地的白茅根际分离的伯克霍尔德菌A-KA菌株对其他根际细菌表现出生长辅助活性，如从耐酸性硫酸盐土壤的水稻根际分离的鞘氨醇单胞菌（Sphingomonassp. Mimosarum）抑制B的环庚三烯酚酮产生。plantarii，一种引起水稻枯萎病的细菌，同时促进各种根和种子附生细菌的生长。在从龙脑香树苗中分离的适应富含多酚的热带泥炭土壤的根际细菌中，含邻苯三酚的植物多酚激活了Burkholderia unamae CK-43 B降解吲哚和其他一些N-杂环芳香族化合物。在苏铁根与固氮蓝藻Nostoc punchiforme的珊瑚状根共生系统中，发现一种甘油二酯是蓝藻识别宿主所必需的激素诱导因子。此外，我们成功地分离和表征信号化合物从根际细菌假单胞菌jessenii菌株EC-S101分离的菠菜根和从根际真菌木霉绿色菌株PS1-7分离的水稻根。在根际，热带泥炭土中的N2 O排放细菌缺失了其N2 O还原酶（N2 OR）基因，并通过植物的几种次生代谢产物影响其反硝化作用

We investigated rhizo-biosystems that enable to mitigate adverse soils in Kalimantan, Indonesia. Burkholderia sp. strain A-KA that had been isolated from the rhizosphere of Imperata cylindrica grown in medium-strongly acidic peatland showed a growth-helper activity toward other rhizosphere bacteria, such as Sphingomonas sp. Burkholderia mimosarum isolated from rhizosphere of paddy rice tolerant to acid-sulfate soil suppressed tropolone production of B. plantarii, a bacterium causative of rice blight disease, while promoted growth of diverse root-and seed-epiphytic bacteria. Among rhizobacteria that had isolated from dipterocarpous sapling adapting to polyphenol-rich tropical peat soil, pyrogallol-containing plant polyphenols activated Burkholderia unamae CK-43B to degrade indole and some other N-heterocyclic aromatic compounds. In the coralloid root symbiotic systems between Cycas revoluta root and a nitrogen-fixing cyanobacterium Nostoc punchiforme, a diacylglycerol was found to be the principle of hormogoniu-inducing factor on the cyanobacterium necessary to its host-recognition. Also, we successfully isolated and characterized signal compounds from a rhizobacterium Pseudomonas jessenii strain EC-S101 isolated from spinach root and from a rhizosphere fungus Trichoderma virens strain PS1-7 isolated from paddy root. In the rhizosphere, nitrous oxide emitting bacteria in tropical peat soil were missing their nitrous oxide reductase (N2OR) genes, and affected its denitrification by several secondary metabolites of plants