Abstract
Abstract: The use of fast and precise procedures for seed analysis is an important factor for making decisions at different stages of seed production. The aim of this study was to evaluate the occurrence of internal damage and associate morphological traits of pearl millet seeds with their physiological potential, and evaluate seed vigor using the Seed Vigor Imaging System (SVIS®) compared to other traditional vigor tests. Eight seed lots of the pearl millet cultivar ADR 300 were analyzed for germination, vigor (first count, accelerated aging, cold test, and SVIS®), internal morphology (X-ray), and morphological parameters (perimeter, area, and roundness). The X-ray test is effective in evaluating the internal morphology of pearl millet seeds, allowing identification of mechanical damage and of deteriorated and malformed tissues, making it possible to establish a relationship between the damage observed and the negative effect on germination. SVIS® analyses on two-day-old seedlings are a reliable method for assessing seed vigor of pearl millet. Parameters of perimeter and area of the seeds are related to their physiological potential.
Highlights
Pearl millet (Pennisetum glaucum L.) is one of the most widely grown cereal crops in the world; its grain is used as food source for humans, especially in Africa and India
X-ray analysis has been used to evaluate the internal morphology of seeds, making it possible to study the relationship between the occurrence of problems and physiological potential
The results obtained in this study prove the effectiveness of the X-ray test for evaluation of the internal morphology of pearl millet seeds because it is possible to observe mechanical damage, tissue deterioration, and malformation, with direct effects on germination
Summary
Pearl millet (Pennisetum glaucum L.) is one of the most widely grown cereal crops in the world; its grain is used as food source for humans, especially in Africa and India. The plant is more tolerant to drought stress than other cereal crops (Ojediran et al, 2010). Various studies directed to evaluation of the internal morphology of seeds have been based on image analysis techniques. X-ray analysis has been used to evaluate the internal morphology of seeds, making it possible to study the relationship between the occurrence of problems (mechanical damage, plant tissue malformation, and insect and microorganism damage) and physiological potential. X-ray images of seeds can be associated with other computerized image techniques for the purpose of increasing the effectiveness of seed analysis (Gomes-Junior, 2010)
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