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Endogenous cyto kinins of mango mangifera indica shoot tips and their significance in flowering



Endogenous cyto kinins of mango mangifera indica shoot tips and their significance in flowering



Indian Journal of Experimental Biology 18(5): 504-509



Mango cv. Dashehari flowers and fruits in alternate years. Qualitative and quantitative analyses of endogenous cytokinins in mango shoot-tips were made. The endogenous levels of cytokinins were higher in 'on' year shoot-tips than in 'off' year ones at the time of flower bud differentiation. Eleven cytokinin-like substances could be isolated from 'on' year shoot-tips employing ion-exchange and paper chromatography. These cytokinins were numbered M1 to M11 on the basis of their Rf values and spectral properties. Only 2 of these, M9 and M10, could be tentatively identified as zeatin riboside and zeatin, respectively. The Rf values and UV spectra of other cytokinins were different from those reported for known cytokinins in the literature. Flowering in mango shoot-tips may be associated with high levels of endogenous cytokinins.

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Accession: 005357839

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