Study objective:
Show the tomato (Solanum lycopersicum) DELLA protein PROCERA (PRO), a negative regulator of GA signaling, acts in guard cells to promote stomatal closure and reduce water loss in response to water deficiency by increasing abscisic acid (ABA) sensitivity.
Study Results:
The Tomato pro Mutant exhibits increased transpiration (measured by Plantarray).
The results indicate that DELLA promotes stomatal closure independently of its effect on growth.
Published article:
The Tomato DELLA Protein PROCERA Acts in Guard Cells to Promote Stomatal Closure
Nir et. Al., (2017) Plant Cell DOI:10.1105/tpc.17.00542