High-Vigor Maize Seeds Resist Fusarium graminearum Infection through Stronger Ca2+ Signaling

Seeds with high vigor have strong resistance to various adverse environmental conditions. However, little is known about how seed affects the of seeds biotic stress. In this study, newly harvested that had and low vigor, achieved via an artificially accelerated aging treatment, were used in germination test after inoculation Fusariumgraminearum for 24 h. The results showed high-vigor seed-related seedling growth not significantly affected by F. graminearum infection, while those related low-vigor inhibited. Analysis transgenic maize expressing luminescent Ca2+ probe encoded aequorin indicated concentration free cytoplasm nucleus embryo cells was higher than seeds. Through experiment inhibitor treatment exogenous application, we further confirmed played important role growth. Interestingly, presence graminearum, required mainly came from vacuolar calcium pool, absence apoplastic store. This study helps understand resist disease provides theoretical support wide application agricultural production.