Expression Pattern of Key Genes Involved in Different Pathway Reveal Diversity in Germination and Dormancy in Watermelon
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Seed germination and dormancy are complex processes influenced by the seed's physical state, which is affected by environmental factors such as temperature, soil moisture, light, and nutrient levels. This condition is partly determined by the interplay between the plant's genetic makeup and these external factors. The growth regulator gibberellins (GAs) and abscisic acid (ABA), which conduct opposite metabolic signaling roles that affect seed germination, are responsible. A thorough knowledge of the molecular and biochemical mechanisms controlling these processes is required to fully understand the events occurring in the seed. In this work, we have selected three watermelon cultivars having good germination, moderate germination and low germination percentages. These cultivars were used for the characterization of genes reported to be involved in the germination or dormancy. These genes are involved in different pathways like GA and ABA metabolism and catabolism in plants. Genes responsible for the regulation of germination or dormancy were also used. The interaction between these genes leads to a state of germination or dormancy. The results suggest that DOG1 and CYP707A1 genes, upregulated only in GN3 may be involved in the dormancy.
Abstract
Seed germination and dormancy are complex processes influenced by the seed's physical state, which is affected by environmental factors such as temperature, soil moisture, light, and nutrient levels. This condition is partly determined by the interplay between the plant's genetic makeup and these external factors. The growth regulator gibberellins (GAs) and abscisic acid (ABA), which conduct opposite metabolic signaling roles that affect seed germination, are responsible. A thorough knowledge of the molecular and biochemical mechanisms controlling these processes is required to fully understand the events occurring in the seed. In this work, we have selected three watermelon cultivars having good germination, moderate germination and low germination percentages. These cultivars were used for the characterization of genes reported to be involved in the germination or dormancy. These genes are involved in different pathways like GA and ABA metabolism and catabolism in plants. Genes responsible for the regulation of germination or dormancy were also used. The interaction between these genes leads to a state of germination or dormancy. The results suggest that DOG1 and CYP707A1 genes, upregulated only in GN3 may be involved in the dormancy.