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Capsicum SIZ1 contributes to ABA-induced SUMOylation in pepper
Shikang Lei1, Qingzhu Wang1, Yang Chen1
1Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation, Southwest University, Chongqing 400715, China.
Plant Science : an International Journal of Experimental Plant Biology
|December 13, 2021
Summary
Pepper
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- Abiotic and biotic stresses limit plant growth.
- Arabidopsis E3 SUMO ligase SIZ1 is crucial for plant stress tolerance.
Purpose of the Study:
- Identify and characterize a pepper (Capsicum annuum) SIZ/PAIS-type protein, CaSIZ1.
- Investigate CaSIZ1's role in Abscisic acid (ABA) and salt stress responses.
Main Methods:
- Sequence analysis and expression profiling of CaSIZ1.
- Subcellular localization and functional complementation in Arabidopsis Atsiz1-2 mutant.
- Investigating CaSIZ1 interaction with CaABI5 and its role in SUMOylation and stress tolerance.
Main Results:
- CaSIZ1 shares 60% sequence identity with AtSIZ1 and is expressed in various pepper tissues, with higher levels in stems and flowers.
- CaSIZ1 is localized in the nucleus and can functionally replace AtSIZ1 in Arabidopsis.
- CaSIZ1 interacts with CaABI5, and its knockdown reduces ABA-induced SUMOylation and salt tolerance in pepper.
Conclusions:
- CaSIZ1 plays a significant role in ABA-induced SUMOylation.
- CaSIZ1 is essential for pepper's response to abiotic stress, particularly salt tolerance.
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