Mapping carbon allocation in above and belowground organs and root exudates of NAM founders and slac1 populations

Understanding carbon (C) allocation in Zea mays (maize) under drought is crucial as climate change increases drought frequency. This knowledge will help ensure food security for a growing population, as maize is one of the world’s most widely grown crops. Water and C cycles within the plant are regulated by the leaf stomata. Under limited water availability, plants close stomata to reduce transpiration and prevent whole-plant hydraulic failure. Stomata closure also limits CO₂ uptake, which reduces photosynthesis rates and lowers C availability, disrupting C allocation patterns. In this project, we aimed to phenotype the stomatal traits of NAM founders and slac1 maize populations and investigate their association with C allocation under well-watered and drought conditions. Our genotypes of focus were HP301, MO18W, slac1 W22, WT W22, B73, and CML277, and we measured their root-shoot ratio, leaves fresh/dry biomass, stomata quantity, and stomata density. Root-shoot ratios and stomatal density responses varied by genotype and developmental stage. Our results suggest genotype-specific strategies for drought response. In our next steps, we will use 13^C labeling to trace C dynamics and link above and belowground traits.

Entering into this experience, I was most looking forward to the chance to finally do research in plant science. My home institution is largely focused on pre-med education and biomedical research. All my research experience before I came to Cornell was medical. My love for environmental and plant science was fulfilled through this internship. This experience solidified for me that plant science research is the path I want to take. I gained a newfound sense of confidence in my capabilities to conduct meaningful research that actually excited me. I am also incredibly grateful, as my time here helped me to gain insight into grad school and my next steps.