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Longitudinal distribution of growth substances in leaves of wheat (Triticum aestivumL.)

โœ Scribed by A. W. Wheeler

Publisher
Springer-Verlag
Year
1973
Tongue
English
Weight
378 KB
Volume
112
Category
Article
ISSN
0032-0935

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โœฆ Synopsis

The basal fifth of the lamina, containing most of the gibberellin of young leaves, was the only part of the lamina that elongated. When the base of the lamina stopped elongating the gibberellin apparently moved up the lamina, but the leaf sheath still contained some gibberellin and continued to elongate. Old, fully elongated, leaves contained most auxin and tryptophan in the apical fifth of the lamina that was dying; young leaves contained insignificant amounts of auxin. Leaves contained two cytokinins; generally most cytokinin activity occurred in the apical fifth of leaves. Cytokinin activity was also detected in guttation drops and in cthanolic washings from leaf tips.

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