The Role of Microbe-Enhanced Iron-Dependent Redox Metabolism in optimizing photosynthesis under high light stress in Arabidopsis

ABSTRACT: High light stress in subtropical and tropical regions strongly limits agricultural production due to photo-oxidative damage, decreased growth and yield. Here, we investigated whether beneficial microbes can protect plants under high light stress. We show that Enterobacter sp. SA187 (SA187) assists Arabidopsis in maintaining growth under high light stress, reducing the accumulation of reactive oxygen species (ROS) and maintaining photosynthesis. Under high light stress, SA187 induces dynamic transcriptional changes related to a fortified iron metabolism and redox system in Arabidopsis. A genetic analysis shows that SA187-induced plant high light stress tolerance is mediated by ethylene signaling via the transcription factor EIN3 to enhance iron metabolism. In summary, we show that Arabidopsis interaction with SA187 results in sustained photosynthesis under high light stress suggesting that beneficial microbes could be an effective and inexpensive means for enhancing high light stress tolerance in crops.

INSTRUMENT(S): LTQ Orbitrap

ORGANISM(S): Arabidopsis Thaliana (mouse-ear Cress)

TISSUE(S): Whole Body

SUBMITTER: Naganand Rayapuram  

LAB HEAD: Naganand Rayapuram

PROVIDER: PXD047231 | Pride | 2025-05-06

REPOSITORIES: Pride