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Fig. 7 | BMC Plant Biology

Fig. 7

From: Role of brassinosteroids in rice spikelet differentiation and degeneration under soil-drying during panicle development

Fig. 7

Effect of exogenous brassinosteroids (BRs) and brassinazole (BRZ) on physiological traits and spikelet development of WT and DR-1 plants. (a) Schematic diagram of the initial stage of spikelet primordium differentiation and the injection site in the chemical treatment experiment; (b, c) Panicle phenotypes of WT and DR-1 under various chemical regulators treatments. Bars = 2 cm. The arrow indicates the obvious degenerated spikelets; (d-j) Changes in contents of BRs (24-epiCS + 28-homoBL), NSC, AsA and H2O2, activities of APX, DHAR, and MDHAR in young rice panicles; (k, l) Spikelet development under various chemical regulators treatments. CK: Panicles received deionized water; eBRZ: Panicles received 10 nmol L− 1 brassinazole (BRZ, an inhibitor of BRs biosynthesis); eBRs: Panicles received 10 nmol L− 1 BRs (24-epiCS + 28-homoBL). Vertical bars represent ± standard error of the mean (n = 6) where these exceed the size of the symbol. Different letters above the bars indicate the least significant difference at P = 0.05

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