Читать книгу Core Microbiome - Группа авторов - Страница 27
2.3.2.1 Competition
ОглавлениеThere is a race between endophytes and phytopathogens to prevent host tissue colonization [55]. They colonize either systemically or locally and act by inhabiting locations available for the pathogens and lurking for nutrients that are available for the proper functioning of the plant [56]. There are not many reports on how nutrient management/uptake by beneficial microbiomes is related. Still, some reports confirm the crosstalk between Fe-deficient/nutrient starvation and resistance elicited by microorganisms. For instance, Herbaspirillum seropedicae Z67, a nitrogen-fixing endophyte, is dependent on iron for its vital cellular processes and produces serobactins (siderophores) to fulfill its iron requirement [57]. Some studies have provided valuable insights into the iron competition between endophyte Streptomyces sporocinereus OsiSh-2 and a pathogen of rice Magnaporthe oryzae [58]. The study indicated that M. oryzae is dependent more on iron supplementation than OsiSh-2 for growth and follows different strategies to acquire iron. Many genes involved in siderophore synthesis and iron uptake were present in endophytes than in pathogens, and OsiSh-2 has an added advantage for capturing iron over M. oryzae [58].