Decarboxylation mechanisms of C4 photosynthesis in Saccharum spp.: increased PEPCK activity under water-limiting conditions.

ABSTRACT:

Background

C4 plants have been classified into three subtypes based on the enzymes used to decarboxylate C4 acids in the bundle sheath cells (NADP-ME, NAD-ME and PEPCK pathways). Evidences indicate that, depending on environmental factors, C4 plants may exhibit a certain degree of flexibility in the use of the decarboxylation mechanisms. In this context, the objective was to extend the knowledge on the degree of flexibility between the pathways of decarboxylation in sugarcane, a NADP-ME species, at different levels of water deficit.

Results

An experiment was carried out with two cultivars - RB92579 (tolerant to water deficit) and SP80-3280 (susceptible to water deficit) subjected to moderate level (- 1.5 to - 1.8 MPa), severe level (below - 2.0 MPa) and recovery (48 h after

SUBMITTER: Cacefo V 

PROVIDER: S-EPMC6469216 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature