Whether Guard Cells (GCs) carry out photosynthesis has been debated for decades. Earlier studies suggested that guard cell chloroplasts (GCCs) cannot fix CO2 but later studies argued otherwise. Until recently, it has remained controversial whether GCCs and/or GC photosynthesis play a direct role in stomatal movements. Dr. Boon Leong LIM, Associate Professor of the School of Biological Sciences of The University of Hong Kong (HKU), in collaboration with Dr. Diana SANTELIA from ETH Zürich, discovered GCs’ genuine source of fuel and untangled the mystery. The findings were recently published in prestigious journal Nature Communications.
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Source: Phys.org