Strigolactones Stimulate High Light Stress Adaptation by Modulating Photosynthesis Rate in Arabidopsis

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Authors

THULA Sravankumar MOTURU Tarakaramji SALAVA Hymavathi BALAKHONOVA Veronika BERKA Miroslav KERCHEV Pavel MISHRA Kumud Bandhu NODZYNSKI Tomasz SIMON Sibu

Year of publication 2023
Type Article in Periodical
Magazine / Source Journal of Plant Growth Regulation
MU Faculty or unit

Central European Institute of Technology

Citation
Web https://doi.org/10.1007/s00344-022-10764-5
Doi http://dx.doi.org/10.1007/s00344-022-10764-5
Keywords Strigolactone; d14; High light stress; Photosynthesis; Transcriptome; Abiotic stress
Description Strigolactones (SLs), a class of carotenoid-derived phytohormones, were originally discovered as rhizosphere signaling molecules. They stimulate parasitic plant seed germination and can establish a symbiotic relationship between plants and beneficial microbes. In addition to their plant developmental role, evidence for their role in various stress responses such as salt and drought stresses was reported recently. In the present study, we tried to understand the unique metabolic pathways that were regulated by SLs in comparison with other plant hormones. We identified that SLs were predominantly modulating photosynthetic pathways in comparison with other plant hormones. Further, we observed that SLs positively influence high light tolerance, and this process is dependent on SL-mediated photosynthesis rate regulation. In addition, the dynamic changes of the metabolites involved in glycolysis and tricarboxylic acid (TCA) cycle upon external application of SL analogue suggest the stress adaptation landscape of plants. Our study presents the dynamic and specific effect of SLs in high light-driven stress adaptation through photosynthesis in plants.
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