Trigalactosyldiacylglycerol 3 protein orthologs are required for basal disease resistance in .

Phosphatidic acid plays an important role in immune responses against phytopathogenic bacteria. We analyzed the contributions of endoplasmic reticulum-derived chloroplast phospholipids, including phosphatidic acid, to the resistance of against . Here, we focused on trigalactosyldiacylglycerol 3 (TGD3) protein as a candidate required for phosphatidic acid signaling.