Inorganic salts influence IAA ionization and adventitious rhizogenesis in Pongamia pinnata

• Published in: Journal of plant physiology Vol. 161; no. 1; pp. 117 - 120
• Main Authors: Ansari, Shamim Akhtar, Singh, Sanjay, Rani, Abha
• Format: Journal Article
• Language: English
• Published: Jena Elsevier GmbH 2004; Elsevier; Elsevier Science Ltd
• Subjects: adventitious shoots; Biological and medical sciences; chemistry; chlorides; Chlorine; Fundamental and applied biological sciences. Psychology; IAA transport; indole acetic acid; inorganic salts; Ionization; Ions; manganese; metabolism; Millettia; Millettia - metabolism; Millettia pinnata; phosphorus; Plant physiology and development; Potassium Compounds; Potassium Compounds - chemistry; Regression analysis; rhizogenesis; Salts; Salts - chemistry; semi-hardwood cuttings; sulfur; sulphur; Water and solutes. Absorption, translocation and permeability; IAA transport; semi-hardwood cuttings; Chlorine; sulphur; manganese; phosphorus; Root; Above ground plant part; Salinity
• ISSN: 0176-1617; 1618-1328
• DOI: 10.1078/0176-1617-01078

The basal cut end of coppice shoot cuttings of Pongamia pinnata was treated for 24 h with 0 (water treated control) or 5.0 mmol/L of KMnO 4, KCl, and KH 2PO 4 or 2.5 mmol/L of K 2HPO 4 and K 2SO 4. Inorganic salts of P, S, Cl and Mn significantly influenced IAA ionization and adventitious rhizogenesis. P and S salts had lower IAA ionization potential, but more pronounced effect on adventitious rhizogenesis than Cl and Mn salts. The linear regression analysis also established negative correlations between salt induced IAA ionization with various characteristics of adventitious rhizogenesis such as sprouting (r = -0.83, p < 0.05), rooting (r = -0.82, p < 0.05), root number (r = -0.95, p < 0.01), and root length (r = -0.80, p < 0.1). The implication of IAA ionization in adventitious rhizogenesis has been discussed and the possible role of inorganic salts therein suggested.