Question: When dormancy occurs due to conditions within the dormant organ itself, it is known as: (IGKV CET Horti 2021)
Options:
Innate dormancy
Imposed dormancy
Induced dormancy
Pre-dormancy
✅Explanation:Innate dormancy, also known as endogenous dormancy or primary dormancy, is a state of developmental arrest in seeds or buds due to internal factors. These factors can include:
-Presence of growth inhibitors: Certain hormones or chemicals prevent germination or bud break.
-Immature embryo: An underdeveloped embryo may require a dormancy period to mature.
-Imperfect seed coat: Properties of the seed coat may hinder water uptake or gas exchange.
-Presence of growth inhibitors: Certain hormones or chemicals prevent germination or bud break.
-Immature embryo: An underdeveloped embryo may require a dormancy period to mature.
-Imperfect seed coat: Properties of the seed coat may hinder water uptake or gas exchange.
📌 Other Options Explained:
-(B) Imposed dormancy (Exogenous dormancy): Caused by external environmental factors preventing germination despite favorable internal conditions (e.g., lack of water, temperature extremes).
-(C) Induced dormancy: Triggered by environmental cues experienced after seed or bud development (e.g., exposure to cold temperatures).