Germination and growth of pea seeds var. ‘Santa Isabel’ subjected to different doses of gibberellins
Contextualization: The pea is a legume with a high nutritional potential because it is a source of protein and is widely cultivated throughout the world.
Knowledge gap: Despite the fact that the percentage of germination of pea seeds is high, this germination is uneven, due to the fact that most legumes have different degrees of dormancy, which generates plants of different sizes and with gaps in the phenological stages of the crop.
Purpose: The objective was to evaluate the effect of different doses of gibberellins on the germination and growth of pea seeds variety 'Santa Isabel'.
Methodology: through a completely randomized design (DCA) with six treatments, which corresponded to the different doses of gibberellins applied (0, 200, 400, 600, 800 or 1000 mg L-1), in which germination variables and subsequent growth of pea seedlings were evaluated.
Results and conclusions: The application of GAs decreases the average germination time. The GAs generated seedlings with more height, but with thinner stems, while the seedlings from seeds without GAs were smaller, but with greater fresh and dry mass of leaves, and with greater aptitude for transplanting. The application of GAs in pea seeds did not affect the total dry and fresh mass of the pea seedlings, neither the MSR nor the MFR. The GAs promoted the redistribution of photoassimilates by increasing the dry and fresh mass of stems at the expense of decreasing the dry and fresh mass of leaves and stipules. As the dose of gibberellins increased, the translocation of photoassimilates from the seed to the stem specifically increased.