Abstract：
The actinobacterium Arthrobacter sp. UMCV2 promotes plant growth through the emission of N,N-dimethylhexadecilamine (DMHDA). The Medicago-Sinorhizobium nodulation has been employed to study symbiotic nitrogen fixation by rhizobia in nodulating Fabaceae. Herein, we isolated three Sinorhizobium medicae strains that were used to induce nodules in Medicago truncatula. The co-inoculation of M. truncatula with Arthrobacter sp. strain UMCV2 produced a higher number of effective nodules than inoculation with only Sinorhizobium strains. Similarly, the exposure of inoculated M. truncatula to DMHDA produced a greater number of effective nodules compared to non-exposed plants. Thus, we conclude that Arthrobacter sp. UMCV2 promotes nodulation, and propose that this effect is produced, at least partly, via DMHDA emission.
摘要：
放线菌节杆菌属。UMCV2通过氮的排放促进植物生长，N-二甲基十六胺(DMHDA)。紫花苜蓿-中华根瘤菌结瘤已用于研究根瘤菌在结瘤豆科中的共生固氮作用。在这里，我们分离了三种用于在苜蓿中诱导结节的中华根瘤菌菌株。与节杆菌的共同接种。与仅接种中华根瘤菌菌株相比，UMCV2菌株产生的有效结节数量更高。同样，与未暴露的植物相比，将已接种的M.truncatula暴露于DMHDA会产生更多的有效结节。因此，我们得出的结论是节杆菌属。UMCV2促进结瘤，并提出产生这种效果，至少部分地,通过DMHDA排放。
