Abstract
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.
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Abbreviations
- IAA:
-
indole-3-acetic acid
- NAA:
-
napthalen acetic acid
- GA3 :
-
gib-berellic acid
- BA:
-
benzyladenine
- ABA:
-
abscisic acid
- MH:
-
maleic hydrazide
- CCC:
-
chlorocholine chloride,
- TIBA:
-
2,3,5-triiodobenzoic acid.
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Dedicated to the 100 anniversary of the birth of Professor B. Němec.
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DostÁl, R. Correlative integration in dormant tubers of circaea intermedia. Biol Plant 15, 27–36 (1973). https://doi.org/10.1007/BF02922510
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DOI: https://doi.org/10.1007/BF02922510