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Bulb Dormancy

Bulb Dormancy. Rest and Dormancy Rest : period is composed of three successive phase “ early rest ”, “ main or middle rest ” and “ after rest ”. Plants or their organs are in a state of “ true dormancy ” during middle rest, and cannot resume growth whatever the external conditions may be.

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Bulb Dormancy

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  1. Bulb Dormancy • Rest and Dormancy • Rest: period is composed of three successive phase “early rest”, “main or middle rest” and “after rest”. • Plants or their organs are in a state of “true dormancy” during middle rest, and cannot resume growth whatever the external conditions may be. • The stage of dormancy during the early rest is termed “pre-dormancy”. The transition from the fully active state through “pre-dormancy” to true dormancy. The state of dormancy is followed by “Post-dormancy” in the phase of after-rest Thus, the dormancy get deeper in the early rest, become deepest in the middle rest, and gets shallower in the after-rest.

  2. Sprout leaf • A sprout leaf is defined as any inner leaf with a leaf ratio (leaf blade length/leaf sheath length) of 0.25 or more (Brewster, 1987)

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