Salicylic acid regulates adventitious root formation via competitive inhibition of the auxin conjugation enzyme CsGH3.5 in cucumber hypocotyls

• Published in: Planta Vol. 252; no. 5; p. 75
• Main Authors: Dong, Chun-Juan, Liu, Xin-Yan, Xie, Lu-Lu, Wang, Ling-Ling, Shang, Qing-Mao
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2020; Springer Nature B.V
• Subjects: Acetic acid; adventitious roots; Agriculture; Amino acids; aspartic acid; Biomedical and Life Sciences; catalytic activity; Competition; Conjugates; Conjugation; cucumbers; Cucumis sativus - enzymology; Cucumis sativus - growth & development; Cyclin-dependent kinase; Cyclin-dependent kinases; cyclins; Ecology; Enzyme Activation - drug effects; Enzymes; Forestry; Gene Expression Regulation, Plant; horticulture; Hypocotyl - enzymology; Hypocotyl - growth & development; Hypocotyls; indole acetic acid; Indoleacetic acid; Kinases; Life Sciences; Ligases - metabolism; Original Article; Plant Roots - drug effects; Plant Roots - enzymology; Plant Sciences; Pretreatment; Propagation; Regulatory mechanisms (biology); Rooting; Salicylic acid; Salicylic Acid - pharmacology; Seedlings; Vegetables; Acyl-amido synthetase; Salicylic acid (SA); Adventitious root; ); Gretchen Hagen3.5 (GH3.5); Indole-3-acetic acid (IAA); Cucumber; Cucumber (cucumis sativus)

Main conclusion Exogenous SA treatment at appropriate concentrations promotes adventitious root formation in cucumber hypocotyls, via competitive inhibiting the IAA-Asp synthetase activity of CsGH3.5, and increasing the local free IAA level. Adventitious root formation is critical for the cutting pr...