Leaf Protein Abundance Associated with Improved Drought Tolerance by Elevated Carbon Dioxide in Creeping Bentgrass
Year: 2016
Type: article
Abstract: Elevated CO 2 may contribute toward plant tolerance to prolonged drought stress. The objective of this study was to investigate changes in protein abundance associated with mitigation of drought stress by elevated CO 2 in leaves of a cool-season grass species used as fine turfgrass. Plants of creeping bentgrass ( Agrostis stolonifera cv. Penncross) were grown at either ambient CO 2 concentration (400 µL·L −1 ) or elevated CO 2 concentration (800 µL·L −1 ) for 35 days under well-irrigated and fertilized conditions and then subjected to drought stress for 21 days by withholding irrigation. Plants exposed to elevated CO 2 concentration maintained higher leaf water content, membrane stability, and visual turf quality (TQ) under drought stress compared with plants grown under ambient CO 2 conditions. The abundance of proteins involved in photosynthetic carbon fixation and assimilation, including chloroplastic glyceraldehyde phosphate dehydrogenase A (GAPDH-A) and ribulose 1,5-bisphosphate carboxylase (RuBisCO) decreased less and the abundance of proteins involved in respiratory metabolism (i.e., cytosolic GAPDH) increased less during drought due to elevated CO 2 . The results suggest that elevated CO 2 lessened growth and physiological damages during drought by facilitating ribulose 1,5-bisphosphate regeneration and adenosine triphosphate (ATP) production in photosynthesis and downregulating factors contributing to respiratory metabolism.
Authors: Patrick Burgess, Bingru Huang
Institution: Rutgers, The State University of New Jersey
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDGs: Climate action, Zero hunger
Open Access status: gold
Estimated APC paid: $3,500
OpenAlex ID: W2335580784