Overexpression of Vitreoscilla hemoglobin increases waterlogging tolerance in Arabidopsis and maize.

ABSTRACT:

Background

Vitreoscilla hemoglobin (VHb) is a type of hemoglobin found in the Gram-negative aerobic bacterium Vitreoscilla that has been shown to contribute to the tolerance of anaerobic stress in multiple plant species. Maize (Zea mays L.) is susceptible to waterlogging, causing significant yield loss. In this study, we approached this problem with the introduction of an exogenous VHb gene.

Results

We overexpressed the VHb gene in Arabidopsis and maize under the control of the CaMV35S promoter. After 14 days of waterlogging treatment, the transgenic VHb Arabidopsis plants remained green, while the controls died. Under waterlogging, important plant growth traits of VHb plants, including seedling height, primary root length, lateral root number, and shoot dry weight were sign

SUBMITTER: Du H 

PROVIDER: S-EPMC4736479 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature