Constitutive Expression of Arabidopsis SMALL AUXIN UP RNA 19 ( SAUR 19 ) in Tomato Confers Auxin-Independent Hypocotyl Elongation 1 [ OPEN ]

The plant hormone indole-3-acetic acid (IAA or auxin) mediates the elongation growth of shoot tissues by promoting cell expansion. According to the acid growth theory proposed in the 1970s, auxin activates plasma membrane H-ATPases (PM HATPases) to facilitate cell expansion by both loosening the cell wall through acidification and promoting solute uptake… CONTINUE READING