Thursday, August 10, 2017: 8:00 AM-11:30 AM
Portland Blrm 256, Oregon Convention Center
Jessica S. Guo, Northern Arizona University
Drew M. P. Peltier, Northern Arizona University
Jessica S Guo, Northern Arizona University
Droughts can result in cascading, complex, and difficult-to-study impacts on individual plant physiology and ecosystem function. As drought-related perturbations of ecosystems become more frequent, our understanding of plant responses to drought stress will become increasingly valuable. A large body of work evaluates the carbon and hydraulic consequences of drought at multiple hierarchical and temporal scales. An emerging theme of this research is that plant responses to drought may be complex, lagging the drought signal on the order of hours to years. Hysteretic drought responses can also lead to delayed recovery after alleviation of drought conditions. Recent studies of both experimental and natural droughts have yielded insight into these types of temporal patterns of response and recovery in plant carbon and hydraulic status. Nonetheless, there remains mechanistic uncertainty in lags and legacies along the spectrum of drought responses, up to and including drought mortality. Non-structural carbohydrates and their role in mitigating or exacerbating responses to drought conditions are a key area of research. Lagged drought effects may also be a function of embolism refilling or other transport limitations that have been recently elucidated. This session seeks to bring together the latest research on mechanisms underlying the responses of plants to drought across time scales as well as the consequences of plant physiology for ecosystem-level responses to changing climate.