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Asian Journal of Plant Sciences
Year: 2006  |  Volume: 5  |  Issue: 1  |  Page No.: 14 - 16

Effect of Chloroindole Auxins on the Growth and Nitrate Reductase Activity in Solanum melongena

S. Hayat, Q. Fariduddin, Barket Ali and A. Ahmad    

Abstract: Chloroindole auxins are useful tools in understanding the signal transduction pathways of the auxins. However, their presence is not acclaimed in majority of the plants. This gives an impression that these auxins could be having certain roles in plants enriched with them. Therefore, the seeds of Solanum melongena (L.) cv. Pusa were soaked in 0, 10-8 or 10-6 M aqueous solutions of IAA, 4,Cl-IAA, 5,Cl-IAA, 6,Cl-IAA, 7,Cl-IAA, 4,6,Cl2-IAA and 4,7,Cl2-IAA for 8 h and cultivated in clay pots. All the auxins improved the growth and NR activity compared with water soaked control. 4,Cl-IAA was most prominent in its effect, generating 29, 54, 30, 34 and 47% higher values for shoot and root length, fresh and dry mass and NR activity, respectively, in 15 day old plants. The order of response to various auxins was 4,Cl-IAA>7,Cl-IAA>6,Cl-IAA = 5,Cl-IAA = 4,6Cl2-IAA = 4,7Cl-IAA>Control.

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