Physiologia Plantarum, Journal Year: 2024, Volume and Issue: 176(6)
Published: Nov. 1, 2024
Abstract Hydrogen sulfide (H 2 S) functions as a signaling molecule affecting plant growth, development, and stress adaptation. Tall fescue ( Festuca arundinacea Schreb.), bioenergy crop, encounters significant challenges in agricultural production owing to low light by shading. However, the influence of H S on tall under (LLS) remains unclear. To examine role acclimation light, we conducted combined analyses physiological traits, metabolomics, transcriptomics. These results showed that mitigated LLS‐induced inhibition photosynthesis maintained normal chloroplast ultrastructure boosting expression photosynthesis‐related genes, including PsbQ , PsbR PsaD PsaK PetH thereby enhancing synthesis carbohydrates (sucrose, starch). upregulated key genes (PFK PK IDH G6PD ) connected glycolysis, tricarboxylic acid cycle, pentose phosphate pathway promote carbon metabolism ensure supply skeletons energy required for nitrogen metabolism. application reverted accumulation nitrate changes enzymes glutamate synthase (GOGAT, EC 1.4.1.13), reductase (NR, 1.6.6.1), glutamine synthetase (GS, 6.3.1.2), dehydrogenase (GDH, 1.4.1.2), thus promoting amino decomposition produce proteins involved assimilation use efficiency well specialized Ultimately, C/N ratio fescue, balanced its metabolism, enhanced shade tolerance, increased biomass. provided new insights into resilience LLS.
Language: Английский