TY  - JOUR
A1  - Gupta, Saurabh
A1  - Dong, Yanni
A1  - Dijkwel, Paul P.
A1  - Müller-Röber, Bernd
A1  - Gechev, Tsanko S.
T1  - Genome-Wide Analysis of ROS Antioxidant Genes in Resurrection Species Suggest an Involvement of Distinct ROS Detoxification Systems during Desiccation
JF  - International Journal of Molecular Sciences
N2  - Abiotic stress is one of the major threats to plant crop yield and productivity. When plants are exposed to stress, production of reactive oxygen species (ROS) increases, which could lead to extensive cellular damage and hence crop loss. During evolution, plants have acquired antioxidant defense systems which can not only detoxify ROS but also adjust ROS levels required for proper cell signaling. Ascorbate peroxidase (APX), glutathione peroxidase (GPX), catalase (CAT) and superoxide dismutase (SOD) are crucial enzymes involved in ROS detoxification. In this study, 40 putative APX, 28 GPX, 16 CAT, and 41 SOD genes were identified from genomes of the resurrection species Boea hygrometrica, Selaginella lepidophylla, Xerophyta viscosa, and Oropetium thomaeum, and the mesophile Selaginella moellendorffi. Phylogenetic analyses classified the APX, GPX, and SOD proteins into five clades each, and CAT proteins into three clades. Using co-expression network analysis, various regulatory modules were discovered, mainly involving glutathione, that likely work together to maintain ROS homeostasis upon desiccation stress in resurrection species. These regulatory modules also support the existence of species-specific ROS detoxification systems. The results suggest molecular pathways that regulate ROS in resurrection species and the role of APX, GPX, CAT and SOD genes in resurrection species during stress.
KW  - abiotic stress
KW  - desiccation
KW  - resurrection plants
KW  - ROS
KW  - ascorbate peroxidase
KW  - glutathione peroxidase
KW  - catalase
KW  - superoxide dismutase
Y1  - 2019
U6  - https://doi.org/10.3390/ijms20123101
SN  - 1422-0067
SN  - 1661-6596
VL  - 20
IS  - 12
PB  - Molecular Diversity Preservation International
CY  - Basel
ER  -