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. 2023 Feb 14;11(8):3346–3358. doi: 10.1021/acssuschemeng.2c06461

Figure 3.

Figure 3

Spd-loaded P[BiBEM-g-(PAA50-b-PNIPAm50)]320 (SBB50) polymer bottlebrushes enhanced photosynthesis in tomato plants under combined heat (40 °C) and light (2000 μmol m–2 s–1 PAR) stress for 1.5 h. (a) Carbon response (A-Ci) curve, (b) maximum carboxylation rate Vcmax determined from fitting the data of the A-Ci curve for Ci< 300 ppm, (c) light response (A-PAR) curve, and (d) photosystem II quantum yields of tomato plants treated with either Spd-loaded bottlebrush, free Spd, or Milli-Q water (control) applied with 0.1 vol % Silwet L-77 spreading agent 24 h after bottlebrush treatments. (e) Carbon response (A-Ci) curve, (f) maximum carboxylation rate Vcmax determined from fitting the data of the A-Ci curve for Ci < 300 ppm, (g) light response (A-PAR) curve, and (h) photosystem II quantum yield of tomato plants 15 days after treatment with the Spd-loaded SBB50 polymer bottlebrushes. Letters indicate differences based on an ANOVA test followed by a Fisher’s LSD test for multiple comparisons, P ≤ 0.05. Error bars represent standard deviations from five to six replicates. Other photosynthetic parameters are shown in Figure S7.