Kolomeichuk L V, Danilova E D, Murgan O K, Sauchuk A L, Litvinovskaya R P, Khripach V A, Kuznetsov V V, Efimova M V
National Research Tomsk State University, 634050, Tomsk, Russia.
Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, 220141, Minsk, Belarus.
Dokl Biol Sci. 2023 Aug;511(1):259-263. doi: 10.1134/S0012496623700485. Epub 2023 Oct 13.
The endogenous brassinosteroid (BS) profile was for the first time shown to change in response to salt stress in potato plants. A group of 6-keto-BSs was identified and found to significantly increase in content during salinization in contrast to other groups of hormones examined. A tenfold reduction in the level of endogenous BSs in mutant Arabidopsis thaliana plants with impaired biosynthesis (det2) (or reception (bri1)) of phytosteroids decreased their salt resistance, as evidenced by a lower efficiency of photochemical processes of photosystem II (PSII) and growth inhibition. The results confirmed the idea that endogenous BSs are involved in the formation of salt resistance in plants.
首次发现马铃薯植株内源性油菜素甾体（BS）的含量会因盐胁迫而发生变化。鉴定出一组6-酮基-BS，发现与所检测的其他激素组相比，其在盐渍化过程中含量显著增加。在植物甾醇生物合成（det2）（或受体（bri1））受损的突变拟南芥植株中，内源性BS水平降低了10倍，这降低了它们的耐盐性，光系统II（PSII）的光化学过程效率降低和生长受抑制就证明了这一点。结果证实了内源性BS参与植物耐盐性形成的观点。
