The effect of molybdenum on seed dormancy

Foliar applications of molybdenum (Mo) on wheat grown in sand culture and irrigated with Mo-free nutrient solution increased ABA content of the grain which in turn led to an increased dormancy. Alpha-amylase development in field-grown grain subject to simulated rain was reduced by Mo application. Similarly, the production of late maturity amylase (LMA) was prevented by foliar Mo applications. Embryos excised from seed of Mo-treated plants showed enhanced sensitivity to exogenously applied ABA. Molybdenum also played a key role in nitrogen metabolism and led to a significant increase in protein content of held-grown grain. The use of Mo to reinforce dormancy and to boost protein content is discussed.