Role of Aquaporins in a Composite Model of Water Transport in the Leaf.

ABSTRACT: Water-transport pathways through the leaf are complex and include several checkpoints. Some of these checkpoints exhibit dynamic behavior that may be regulated by aquaporins (AQPs). To date, neither the relative weight of the different water pathways nor their molecular mechanisms are well understood. Here, we have collected evidence to support a putative composite model of water pathways in the leaf and the distribution of water across those pathways. We describe how water moves along a single transcellular path through the parenchyma and continues toward the mesophyll and stomata along transcellular, symplastic and apoplastic paths. We present evidence that points to a role for AQPs in regulating the relative weight of each path in the overall leaf water-transport system and the movement

SUBMITTER: Yaaran A 

PROVIDER: S-EPMC4964421 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature