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A CONTRIBUTION TO THE STUDY OF ROOT OF LENS CULINARIS L., ROOTLETS, XYLARY REGION, TRANSITIONAL REGION AND INITIATION OF VASCULAR CAMBIUM FOLLOWING TREATMENTS WITH IAA, GA, AND KINETIN
Abstract
The action of growth hormones ie. GAs, lAA and Kinetin (individually as well as in combinations) on the external and internal morphology of root of Lens culinaris L., has been comprehensively reviewed The following concentrations of the three hormones applied individually 500 ppm GAs. 500 ppm IAA and 30 ppm Kinetin. In combination concentrations used were 500 pm GiA. * 500 pm LAA. 500 ppm GA, + 30 ppm Kinetin, 500 ppm lAA + 30 ppm Kinetin, 500 ppm CiA, + 500 ppm lAA + 30 ppm Kinetin. In the extemal morphology applied GA, increased the length, however. a corresponding decrease in, diameter was registered. Furthermore, the fresh and dry weight showed decrease when compared with control. Exogenous IAA showed decrease in length and expansion in diameter. the fresh and dry weight also increased. Kinetin revealed positive effect on all the above parameters. The number of rootlets increased with IAA and Kinetin, The mixed doses of GAs Showed extension in growth lAA and Kinetin inhibited length. In the internal morphology cortical region and endodermis showed no significant response. The stellar region showed a well marked increase in the diameter of metaxylem clements as well as increase in the number- and carly maturation following treatments with JAA and Kinetin
