Changes in polyamine contents during Fusarium graminearum and Fusarium verticillioides inoculation in maize seedlings with or without seed‑priming

发布日期：2024-01-28

Author：Blanka Kovács，Anett Kovács，Magda Pál，Tamás Spitkó， Csaba L. Marton，Csaba Szőke

Abstract：Maize (Zea mays L.) is the most produced feld crop all over the world. One of its most critical diseases that results in economic loss is ear rot caused by various Fusarium species. Previous researches have shown that polyamines, found in all living cells, play crucial role in biotic stress responses. At the same time, biosynthesis of polyamines is of paramount importance not only for plants but also for their pathogens to promote stress tolerance and pathogenicity. In our study, we investigated the polyamine content changes induced in the seedlings of two maize genotypes of diferent susceptibility by isolates of Fusarium verticillioides and Fusarium graminearum, two Fusarium species of diferent lifestyles. Apart from that, it was examined how infection efciency and changes in polyamine contents were modifed by salicylic acid or putrescine seed soaking pre-treatments. Our observations confrmed that initial and stress-induced changes in the polyamine contents are not directly related to tolerance in either coleoptile or radicle. However, the two pathogens with diferent lifestyles induced remarkably distinct changes in the polyamine contents. The efect of the seed soaking pre-treatments depended on the pathogens and plant resistance as well: both salicylic acid and putrescine seed soaking had positive results against F. verticillioides, while in the case of infection with F. graminearum, seed soaking with distilled water alone afected biomass parameters positively in the tolerant genotype.

Source：Biologia Futura (2023) 74:145–157