Journal
PLANT CELL REPORTS
Volume 37, Issue 5, Pages 759-773Publisher
SPRINGER
DOI: 10.1007/s00299-018-2265-x
Keywords
OsPKS2; PKSB/LAP5; Rice; Pollen; Exine; Sporopollenin
Categories
Funding
- National Natural Science Foundation of China [91435102, 31570004]
- Sichuan provincial founding for Distinguished Young Scholars [2015JQ0048]
- State Key Laboratory of Hybrid Rice (Hunan Hybrid Rice Research Center) [2016KF10]
- Sichuan Science and Technology Support Project [2016NZ0103]
Ask authors/readers for more resources
OsPKS2, the rice orthologous gene of Arabidopsis PKSB/LAP5, encodes a polyketide synthase that is involved in pollen wall formation in rice. In flowering plants, the pollen wall protects male gametes from various environmental stresses and pathogen attacks, as well as promotes pollen germination. The biosynthesis of sporopollenin in tapetal cell is critical for pollen wall formation. Recently, progress has been made in understanding sporopollenin metabolism during pollen wall development in Arabidopsis. However, little is known about the molecular mechanism that underlies the sporopollenin synthesis in pollen wall formation in rice (Oryza sativa). In this study, we identified that a point mutation in OsPKS2, a plant-specific type III polyketide synthase gene, caused male sterility in rice by affecting the normal progress of pollen wall formation. Two other allelic mutants of OsPKS2 were generated using the CRISPR/Cas9 system and are also completely male sterile. This result thus further confirmed that OsPKS2 controls rice male fertility. We also showed that OsPKS2 is an orthologous gene of Arabidopsis PKSB/LAP5 and has a tapetum-specific expression pattern. In addition, its product localizes in the endoplasmic reticulum. Results suggested that OsPKS2 is critical for pollen wall formation, and plays a conserved but differentiated role in sporopollenin biosynthesis from Arabidopsis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available