Differential expression of genes in the leaves of sugarcane in response to sugar accumulation

ABSTRACT: In C4 sugarcane (Saccharum spp. hybrids), photosynthetic activity has been shown to be regulated by the demand for carbon from sink tissues. There is evidence, from other plant species, that sink-limitation of photosynthesis is facilitated by sugar-signaling mechanisms in the leaf that affect photosynthesis through regulation of gene expression. In this work, we manipulated leaf sugar levels by cold-girdling leaves (5oC) for 80 h to examine the mechanisms whereby leaf sugar accumulation affects photosynthetic activity and assess whether signaling mechanisms reported for other species operate in sugarcane. During this time, sucrose and hexose concentrations above the girdle increased by 77% and 81%, respectively. Conversely, leaf photosynthetic activity (A) and electron transport rates (

ORGANISM(S): Saccharum officinarum

SUBMITTER: Alistair McCormick 

PROVIDER: E-GEOD-11934 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress