Acquisition Pattern of Physiological Quality in Peanut Seeds Under Irrigated and Drought Conditions.

Due to the relevance of peanuts (Arachis hypogaea L.) in the Southern US, studies are regularly conducted in different areas to assess management strategies to improve yield. The use of high-quality seed is an important strategy to ensure successful plant stand and yield potential in peanut production. This study aimed to identify at what timing peanut seeds acquire physiological quality components, such as germination and vigor, as well as when they reach maximum potential during seed development. The research was conducted under two water regimes, irrigated and drought stress. Seeds of the cultivar Georgia-06G were planted on May 30, 2019. Water was withheld from the drought-stressed plots for 30 days, starting at 80 days after planting (DAP). Irrigated plots received supplemental irrigation so as to provide required water by the plants. The plants were harvested at 140 DAP (2300 growing degree days) and seeds were separated into eight groups according to the maturity classes from the peanut maturity profile board. Seeds were further split into two groups and one group was treated with Ethephon to release potential dormancy. Germination was tested by quantifying radicle protrusion (2 mm) after 10 days. Moisture content, germination and vigor acquisition, and natural alleviation of dormancy during peanut seed development will be presented.