Hidrocondicionamento e suas relações com o desenvolvimento inicial de feijoeiro cv. BRS Madrepérola

Abstract

The BRSMG Madrepérola is a common bean cultivar which was development by UFLA. This cultivar has many attributes to productivity, disses tolerance and commercial. Hydropriming is a simple and sheep technic used to improved drought tolerance. It can increased seeds vigor, but little is known about the effects on plant growth. Indeed, experiment was realized to measure hydropriming with re-drying (fast and slow) benefits on germination and seedlings establishment of BRSMG Madrepérola under drought. Hydrotime model was used to measure hydropriming effect on seeds and biochemistry process of drought tolerance were used to measure hydropriming effect on seedlings and stress “memory” effect. Hydrotime showed which hydropriming with re-drying reduced germinability and increased time-course of germination under more negatives water potentials. Furthermore, hydropriming increased germination energy of seeds and reduced free proline content. In BRSMG Madrepérola seedlings hydropriming with fast and slow re-drying increased speed and intensity of osmolity accumulation. The hydropriming also increased enzymes activity of antioxidant system in roots and leaves. Thus, hydropriming use not improved germination under drought while in seedlings it promote improve on drought tolerance mechanisms.