Plants have evolved to respond to complex environmental fluctuations that take place at time-scales that go from seconds to years. These environmental signals shape plant developmental and physiological responses and are difficult to reproduce in laboratory conditions. Many environmental effects are integrated through gene expression regulation. To better understand how plants respond to environmental conditions, we studied global gene expression patterns under natural fluctuating conditions in the Philippines, in irrigated and rainfed fields typical of the main modes of rice (Oryza sativa) cultivation, over two seasons (wet and dry). We determined simple linear models that relate transcriptomic variation to climatic fluctuations. Our results show extensive impact of the field environment on the gene expression response to meteorological conditions, especially under limited water availability, for groups of co-expressed genes involved in photosynthesis and development. We looked at specific genes known to play a role in the response to environmental stresses to understand how signaling pathways are modulated when multiple stresses co-occur. We also focused on less well-characterized responses, in particular gene expression changes driven by wind fluctuations, to show how our approach can provide new insight that would be difficult to gain from laboratory experiments.

Dra. Anne Plessis
The Purugganan laboratory for plant evolutionary genomics Biology Department, New York University
Lunes 30 de Noviembre de 2015, 11:00 hrs
– Auditorio del Jardín Botánico del IBUNAM
Coordinador de Seminarios: Alejandro Oceguera Figueroa