Overexpression of orange gene (Osor-R115H) enhances heat tolerance and defense-related gene expression in rice (Oryza sativa L.)

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Title
Overexpression of orange gene (Osor-R115H) enhances heat tolerance and defense-related gene expression in rice (Oryza sativa L.)
Author(s)
Y J Jung; J Y Go; H J Lee; J S Park; J Y Kim; Y J Lee; M J Ahn; M S Kim; Y G Cho; Sang Soo KwakHo Soo Kim; K K Kang
Bibliographic Citation
Genes, vol. 12, no. 12, pp. 1891-1891
Publication Year
2021
Abstract
In plants, the orange (Or) gene plays roles in regulating carotenoid biosynthesis and responses to environmental stress. The present study investigated whether the expression of rice Or (OsOr) gene could enhance rice tolerance to heat stress conditions. The OsOr gene was cloned and constructed with OsOr or OsOr-R115H (leading to Arg to His substitution at position 115 on the OsOr protein), and transformed into rice plants. The chlorophyll contents and proline contents of transgenic lines were significantly higher than those of non-transgenic (NT) plants under heat stress conditions. However, we found that the levels of electrolyte leakage and malondialdehyde in transgenic lines were significantly reduced compared to NT plants under heat stress conditions. In addition, the levels of expression of four genes related to reactive oxygen species (ROS) scavenging enzymes (OsAPX2, OsCATA, OsCATB, OsSOD-Cu/Zn) and five genes (OsLEA3, OsDREB2A, OsDREB1A, OsP5CS, SNAC1) responded to abiotic stress was showed significantly higher in the transgenic lines than NT plants under heat stress conditions. Therefore, OsOr-R115H could be exploited as a promising strategy for developing new rice cultivars with improved heat stress tolerance.
Keyword
Transgenic riceHeat toleranceOsOr-R115HGene expression
ISSN
2073-4425
Publisher
MDPI
DOI
http://dx.doi.org/10.3390/genes12121891
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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