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Role of Hydropriming and Magneto-Priming in Developing Stress Tolerance

There was upregulation of genes involved in DNAdamage repair and anti­

oxidant defense in hydro primed plant material (Figure 4.2). Hydropriming

allows enhances seed moisture status moisture, shortens imbibition duration

along with constant supply of oxygen, thus increasing the level of metabolites

associated with the germination process. Rather, hydropriming is considered

as an early germination process at an optimal priming environment. In

Arabidopsis, a hydropriming-specific Catalase isoform is found (Gallardo

et al., 2001). In sugar beet seeds, hydropriming induces the accumulation

of ABA signaling intermediates protein phosphatase 2C and 14-3-3 proteins

(Catusse et al., 2011).

FIGURE 4.2 Effect of hydropriming on the seed germination and plant growth under abiotic

stresses.

The morpho-physiological and biochemical responses of magnetoprimed

seeds to various stresses are summarized in Figure 4.3. Figure 4.3 illustrates

that magneto-priming enhances the seed germination and seedling growth

due to increase in the level of ROS, NO which may have a signaling role. The

increased activities of amylase and protease in the germinating seeds can lead

to a faster rate of germination. This stimulatory effect of magneto-priming