WT and PDRP knockout plants at the 3-to 4-week stage after germination and growth under standard growth chamber conditions. Plants were germinated and grown under standard growth chamber conditions (normal air conditions, ∼700-μmol quanta m⁻² s⁻¹, 16-h/8-h day/night, 31°C/22°C photoperiod). Additional, details provided in “Materials and methods.”