Influence of kinetin on protochlorophyll(ide) accumulation and on the Shibata shift in Raphanus seedlings
- 1 January 1978
- journal article
- research article
- Published by Springer Nature in Planta
- Vol. 139 (2), 127-132
- https://doi.org/10.1007/bf00387137
Abstract
Radish seedlings (Raphanus sativus L. Saxa Treib) were grown in the dark with or without added kinetin (2 mg/l=9.29 μM). Low-temperature (77°K) fluorescence emission and absorption spectra of etiolated cotyledons were registered at increasing seedling age before and immediately, 30 s and 30 min after one 1-ms flash. Kinetin was found to induce a higher accumulation of the phototransformable protochlorophyll(ide) P657–650 in the etiolated cotyledons, especially from day 6 to day 10 after germination. The amount of the P657–650 protochlorophyll(ide) resynthesized during a 30-min dark period after a 1-ms flash decreased with seedling age. It was smaller in cotyledons from kinetin-treated seedlings at day 6 after germination and at that age only. The ability to perform the Shibata shift decreased with increasing seedling age. In cotyledons from 10- and 13-day-old seedlings, the shift was accomplished to a greater extent when the plants were grown in the presence of kinetin.Keywords
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