biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 15:27-36, 1973 | DOI: 10.1007/BF02922510

Correlative integration in dormant tubers of circaea intermedia

R. DostÁl1
1 Department of Botany, College of Agriculture, Brno, Czechoslovakia

The apical dominance in dormant tubers ofCircaea intermedia preventing the extension of lateral buds under favourable conditions differs from the apically directed growth inhibition inducing true dormancy in the tubers. This acropetal inhibition affects the tuber tip more strongly than its lateral buds, which develop into long stolon-like shoots after the tuber decapitation. The local supply of ABA shows no tuberizing effect, but enhances the dormancy of the tuber top. MH interrupts the correlation between the tuber laterals tuberizing without previous stolon formation. The uppermost leaf structures participate in the apical dominance, inhibiting their own axillaries on intact tubers. Mature scales disclose this correlative influence only on decapitated or dissected tubers on which IAA or BA release their inhibitory effect, but ABA increases it. Two scale pairs occurring regularly at the top of dormant tubers and seen later at the erect base of the stem are involved in the initiation of foliage leaves for the next-year growth period. BA applied to an axil at the top of the tuber provokes its sylleptic branching.

Received: February 22, 1972; Published: January 1, 1973  Show citation

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DostÁl, R. (1973). Correlative integration in dormant tubers of circaea intermedia. Biologia plantarum, 15(1), 27-36. doi: 10.1007/BF02922510
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