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Chemical and Biological Technologies in Agriculture
Fig. 1 | Chemical and Biological Technologies in Agriculture

Fig. 1

From: Physiological, molecular, and genetic mechanism of action of the biostimulant Quantis™ for increased thermotolerance of potato (Solanum tuberosum L.)

Fig. 1

Chlorophyll fluorescence and photosynthetic activity of Quantis™-treated and untreated (water-control) potato plants from 0 h to 24 h post-Quantis.™ application and 12 h post-heat stress. a PSII maximum efficiency (Fv’/Fm’), b quantum yield of PSII photochemistry (ΦPSII), c non-photochemical quenching (NPQ), d stomatal conductance, and e rate of photosynthesis. Ambient temperature varied from 20–36 ℃, with highest temperature of 35 ℃ and 38 ℃ recorded at 12 h and 24 h post-application. Grey shading a–e shows period of heat stress from 12 h post-application. Data represent mean ± SEM of seven biological replicates per treatment with two experimental replicates. Asterisk indicates significant difference according to Student’s t test, p < 0.05

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