Comprehensive studies reveal physiological and genetic diversity in traditional rice cultivars for UV-B sensitivity
- PMID: 38849505
- PMCID: PMC11161635
- DOI: 10.1038/s41598-024-64134-0
Comprehensive studies reveal physiological and genetic diversity in traditional rice cultivars for UV-B sensitivity
Abstract
Acclimation to crop niches for thousands of years has made indigenous rice cultivars better suited for stress-prone environments. Still, their response to UV-B resiliency is unknown. 38 rice landraces were grown in cemented pots in a randomised block design with three replicates under open field conditions in Sambalpur University in the wet season of 2022. Half of the plants in each of the cultivars were administered UV-B radiation at the panicle emergence stage in an adjustable UV-B chamber permitting sunlight, and the effects of the stress on various morpho-physiological features, such as spikelet sterility, flag leaf photosynthetic and flavonoid pigment contents, and lipid peroxidation activities, were estimated for calibration of stress resistance. The experiment identified Swarnaprabha and Lalkain as the most sensitive and resilient to stress respectively, and the differential response between them was further revealed in the expression of genes related to UV-B sensitivity. Subject to the stress, Swarnaprabha exhibited symptoms of injuries, like leaf burns, and a higher loss of various photosynthetic parameters, such as pigment contents, SPAD and Fv/Fm, ETR and qP values, while NPQ increased only in Lalkain. Exposure to UV-B increased the total phenolic and flavonoid contents in Lalkain while depressing them in Swarnaprabha. Such an effect amounted to a higher release of fluorescent energy in the latter. The levels of expression of gene families controlling flavonoid activation and UV-B signal transduction, such as OsWRKY, OsUGT, OsRLCK, OsBZIP, OsGLP, and CPD photolyase were similar in both the cultivars in the control condition. However, exposure to UV-B stress overexpressed them in resilient cultivars only. The magnitude of expression of the genes and the impact of the stress on photosynthetic parameters, phenolic compounds and pubescent hair structure at the panicle emergence stage could be valid indicators among indigenous rice for UV-B tolerance.
Keywords: Anthocyanin; Flavonoid; Photosynthetic parameters; Pubescent hairs; Rice; UV-B stress-sensitive genes.
© 2024. The Author(s).
Conflict of interest statement
The authors declare no competing interests.
Figures
![Figure 1](https://www.ncbi.nlm.nih.gov/pmc/articles/instance/11161635/bin/41598_2024_64134_Fig1_HTML.gif)
![Figure 2](https://www.ncbi.nlm.nih.gov/pmc/articles/instance/11161635/bin/41598_2024_64134_Fig2_HTML.gif)
![Figure 3](https://www.ncbi.nlm.nih.gov/pmc/articles/instance/11161635/bin/41598_2024_64134_Fig3_HTML.gif)
![Figure 4](https://www.ncbi.nlm.nih.gov/pmc/articles/instance/11161635/bin/41598_2024_64134_Fig4_HTML.gif)
![Figure 5](https://www.ncbi.nlm.nih.gov/pmc/articles/instance/11161635/bin/41598_2024_64134_Fig5_HTML.gif)
Similar articles
-
Effects of nitrogen application rate on the photosynthetic pigment, leaf fluorescence characteristics, and yield of indica hybrid rice and their interrelations.Sci Rep. 2021 Apr 5;11(1):7485. doi: 10.1038/s41598-021-86858-z. Sci Rep. 2021. PMID: 33820934 Free PMC article.
-
The rice germin-like protein OsGLP1 participates in acclimation to UV-B radiation.Plant Physiol. 2021 Jun 11;186(2):1254-1268. doi: 10.1093/plphys/kiab125. Plant Physiol. 2021. PMID: 33713137 Free PMC article.
-
Responses of photosynthetic properties and antioxidant enzymes in high-yield rice flag leaves to supplemental UV-B radiation during senescence stage.Environ Sci Pollut Res Int. 2015 Mar;22(6):4695-705. doi: 10.1007/s11356-014-3714-x. Epub 2014 Oct 21. Environ Sci Pollut Res Int. 2015. PMID: 25328096
-
Sensitivity of rice to ultraviolet-B radiation.Ann Bot. 2006 Jun;97(6):933-42. doi: 10.1093/aob/mcl044. Epub 2006 Mar 6. Ann Bot. 2006. PMID: 16520342 Free PMC article. Review.
-
Influence of PAR and UV-A in determining plant sensitivity and photomorphogenic responses to UV-B radiation.Photochem Photobiol. 2004 Apr;79(4):307-15. doi: 10.1562/2004-01-27-ir.1. Photochem Photobiol. 2004. PMID: 15137505 Review.
References
-
- Teramura AH, Ziska LH, Sztein AE. Changes in growth and photosynthetic capacity of rice with increased UV-B radiation. Physiol. Plant. 1991;83:373–380. doi: 10.1111/j.1399-3054.1991.tb00108.x. - DOI
-
- Mitra, A. P. Global change and Indian experience. Impact of global climatic changes on photosynthesis and plant productivity. In Proceedings of the Indo-US workshop. Oxford/IBH publishers, New Delhi/Bombay, India, pp 8–12 (1991).
-
- Madronich S, McKenzie RL, Bjorn LO, Caldwell MM. Changes in ultraviolet-radiation reaching the earth’s surface. AMBIO. 1995;24:143–152. - PubMed
-
- Bhattacharya D, Steward KC, Chandler M, Forbes C. Using climate models to learn about global climate change: Investigating the phenomenon of increasing surface air temperatures using a global climate modelling approach. Sci. Teach. 2020;88(1):58–66. doi: 10.1080/00368555.2020.12293558. - DOI
-
- Mohammed A, Tarpley L. Effects of elevated ultraviolet-B radiation on productive tillers, spikelet sterility and grain characteristics of southern US rice (Oryza sativa L.) cultivars. J. Agron. Crop Sci. 2009;195:292–300. doi: 10.1111/j.1439-037X.2009.00377.x. - DOI
MeSH terms
Substances
Grants and funding
LinkOut - more resources
Full Text Sources