Application of fast chlorophyll a fluorescence kinetics to probe action target of 3-acetyl-5-isopropyltetramic acid

▶ Phytotoxin 3-acetyl-5-isopropyltetramic acid (3-AIPTA) is a derivate tetramic acid. ▶ 3-AIPTA is a multi-target inhibitor of root and shoot growth and photosynthesis. ▶ 3-AIPTA interrupts electron flow beyond QA by occupying the QB-binding site. ▶ 3-AIPTA has a different binding behavior during interaction with the QB-niche. ▶ 3-AIPTA and even tetramic acid families, is a novel photosynthesis inhibitor.