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Correlation of endogenous cytokinins with apical dominance in response to morphactin in soybean (Glycine max L.)

Correlation of endogenous cytokinins with apical dominance in response to morphactin in soybean (Glycine max L.)

Proceedings of the Indian Academy of Sciences, B 87(11): 319-324

Morphactin (100 ppm) treated plants of soybean (G. max cv. Bragg) were studied for morphological, anatomical changes and for the endogenous levels of cytokinins. The reduction in internodal length was drastic and almost all the lateral buds of the treated plants were released from apical dominance. Some reduction in root length of treated plants was also observed. A conspicuous anatomical change was the increased breadth of stem meristematic cells. The cell number per unit area (208.32 .mu.) in root and stem meristematic zones declined significantly. The increase in the levels of 3 spp. of cytokinins zeatin, zeatin riboside and zeatin ribotide was significant while an unknown species maintained its level in treated and control plants. Another natural cytok inin, 2 iP [N6-r,r-dimethylylamino purine] could not be detected.

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Accession: 000623663

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DOI: 10.1007/bf03048163

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