Seed size and water and saline stress in corn germination
Abstract
Water and salt stress have a negative effect on the germination and seedling quality of corn. Thus, it seeks alternatives to mitigate its effects on the crop, with seed vigor, which is associated with its size, a point to be explored. Therefore, the objective was to evaluate the effect of seed size on the germination process under water stress induced by polyethylene glycol (PEG) and sodium chloride (NaCl) solutions. A randomized block design was adopted in a 5 x 3 factorial scheme as follows: five seed sizes (20C; 20L; 22C; 22L and 24L) and three solutions (distilled water and PEG and NaCl and PEG solutions to simulate hydrical stress). The following parameters were evaluated: germination; epicotyl, radicle and seedling length; shoot, root and total dry matter; relative water content in seedlings; root/shoot dry matter ratio; seedling dry matter vigor index; and seedling length vigor index. The size of corn seeds has an effect on the germination and quality of its seedlings, but the results are dependent on the source of stress induction. In the control treatment, NaCl solution and PEG solution, the seed sizes that culminated in greater germination and seedling vigor were 22C and 24L; 20C and 22L; 22C and 24L; respectively.References
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