jmansweed
Member
That is correct dongle69 - I think DG meant nutreints salts - not exudates. During Senesence a plant will slow it's relasioship with microbial life. This is done simply by limited exudates. The microbial life remains dormant until they recieve signals from the root system. This in part is responsible for the plant essentially eating itself. She limits microbial action hence limiting absorption. So Dg's "one way street theory" imho almost does apply later in flowering, under natural plant processes.