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The iPACERS project is a four-year, NSF-funded research initiative aimed at understanding and mitigating the effects of heat and drought stress on soybean crops. Led by Shahid Mukhtar at Clemson University, the project brings together experts from Clemson, the University of Alabama at Birmingham, Mississippi State University, and the LSU AgCenter.
The soybean life cycle begins with the vegetative stages, which focus on the plant’s growth and development. It starts at emergence, when the seed germinates and pushes through the soil surface. Shortly after, the cotyledon stage occurs, where the first seed leaves appear and provide stored energy to help the young plant grow. As the plant continues to develop, it produces its first trifoliate leaf, which consists of three leaflets. Additional sets of trifoliate leaves follow, allowing the plant to capture more sunlight and strengthen its structure for the next phase.
Once the plant is well established, it enters the reproductive stages. This phase begins with flowering, starting with the first blooms and progressing to full bloom across the plant. These flowers are essential for pollination, which leads to pod formation. Initially, small pods appear during the beginning pod stage, and they grow into full pods as the plant continues to mature. Inside these pods, seeds begin to develop and eventually reach full size during the full seed stage.
As the plant approaches the end of its life cycle, it enters the maturity stages. The beginning maturity stage is marked by pods changing color, signaling that the plant is nearing harvest readiness. Finally, the plant reaches full maturity when the seeds inside the pods are completely developed and dry enough for harvesting. This entire process—from emergence to full maturity—illustrates how soybeans progress from a tiny seed to a fully mature crop ready for use in food, feed, and other products.
Plants and microbes share a close relationship that benefits both. This image shows how different microbial communities live in and around a soybean plant, helping it grow and stay healthy. These communities occupy three main zones: the phyllosphere, the endosphere, and the rhizosphere.
The phyllosphere refers to the surfaces of leaves, stems, and flowers. Microbes living here include various bacteria that can protect the plant from harmful pathogens and sometimes help with nutrient absorption. These organisms thrive on the outer parts of the plant exposed to air and light.
Inside the plant is the endosphere, which hosts microbes that live within plant tissues. These internal microbes can play important roles in plant health by promoting growth, improving stress tolerance, and aiding in nutrient transport. They form a hidden but essential part of the plant’s internal ecosystem.
Below the soil surface lies the rhizosphere, which surrounds the plant’s roots. This zone is rich in microbial life, including nitrogen-fixing bacteria that convert atmospheric nitrogen into forms the plant can use. Other organisms like free-living bacteria, mycorrhizal fungi, and nematodes also inhabit this area, helping with nutrient cycling and soil health. Together, these microbes create a supportive environment that allows the plant to thrive.
An extreme drought across Louisiana last year revealed just how vulnerable soybeans are to harsh climate conditions. To address this challenge, LSU AgCenter plant pathologist Jong Ham is leading innovative research on how bacterial seed treatments can help soybeans withstand heat and drought stress. This work is part of the iPACERS project—the Interdisciplinary Program of Advancing Climate Extreme Resilience in Soybean—funded by the National Science Foundation (NSF).
The NSF has recognized the urgency of climate resilience by awarding $77.8 million to 14 projects nationwide, including $6 million to iPACERS through EPSCoR. This investment supports cutting-edge science that integrates plant genetics, soil microbiome research, and advanced technologies like AI and drone imaging to safeguard one of America’s most important crops.
