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In nature dormant buds and in vitro dormant-like buds ofFraxinus excelsior L.

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Summary

Microcuttings ofFraxinus excelsior, sampled from adult trees during the period of cell cycle blockage of bud in G0–1, developed long rejuvenated sprouts on the Woody Plant Medium (WPM) with benzylaminopurine (BAP) (4.0 mg/l) and indolebutyric acid (IBA) (0.03 mg/l). These sprouts had the ability to enter a resting period, building dormant-like buds when maintained on the original WPM. Sprouts developed from subcultures also entered a resting period without any transfer. Comparison of in nature buds in active growth and dormancy with buds of growing sprouts and in vitro dormant-like buds revealed similarity in behaviour at the shoot apical level. In particular, in dormant-like buds in a constant environment, shoot apical functioning was suppressed while the cell cycle of the shoot apex was blocked at the G0–1 phase, like in nature dormant buds.

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Abbreviations

a.u.:

arbitrary unit

BAP:

benzylaminopurine

CF:

cumulative frequency

d1, d2 :

diameters of the shoot apex

IBA:

indolebutyric acid

Pn :

last opposite primordia of range n

WPM:

woody plant medium

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Nougarède, A., Silveira, C.E. & Rondet, P. In nature dormant buds and in vitro dormant-like buds ofFraxinus excelsior L.. Protoplasma 190, 16–24 (1996). https://doi.org/10.1007/BF01281191

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