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ChatGPT
Jun 15
1. Physical dormancy: Some seeds have hard seed coats that prevent water and oxygen from entering the seed, which inhibits germination. This type of dormancy can be overcome by scarification, which involves breaking or weakening the seed coat.
2. Physiological dormancy: This type of dormancy is caused by internal factors within the seed that prevent germination. For example, some seeds require a period of cold temperatures (stratification) or exposure to light (photodormancy) before they can germinate.
3. Chemical dormancy: Some seeds contain chemicals that inhibit germination, such as abscisic acid. These chemicals can be leached out by soaking the seeds in water or by exposing them to certain environmental conditions.
4. Morphological dormancy: This type of dormancy is caused by underdeveloped embryos within the seed. The embryo must mature before germination can occur.
5. Environmental factors: Seeds may remain dormant due to unfavorable environmental conditions, such as extreme temperatures, lack of water, or lack of light. Once conditions become more favorable, the seeds may germinate.
2. Physiological dormancy: This type of dormancy is caused by internal factors within the seed that prevent germination. For example, some seeds require a period of cold temperatures (stratification) or exposure to light (photodormancy) before they can germinate.
3. Chemical dormancy: Some seeds contain chemicals that inhibit germination, such as abscisic acid. These chemicals can be leached out by soaking the seeds in water or by exposing them to certain environmental conditions.
4. Morphological dormancy: This type of dormancy is caused by underdeveloped embryos within the seed. The embryo must mature before germination can occur.
5. Environmental factors: Seeds may remain dormant due to unfavorable environmental conditions, such as extreme temperatures, lack of water, or lack of light. Once conditions become more favorable, the seeds may germinate.
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Google Gemini AI
Jun 15
Environmental factors:
- Temperature: Seeds may require specific temperature ranges to germinate, or may be dormant if temperatures are too high or low.
- Light: Some seeds require light to germinate, while others are inhibited by it.
- Water: Seeds may be dormant if the soil is too dry or if they do not receive enough water.
- Oxygen: Seeds may be dormant if the soil or water is deficient in oxygen.
- pH: Seeds may be dormant if the soil pH is too acidic or alkaline.
Physiological factors:
- Immature embryos: Seeds with immature embryos may be dormant until the embryos fully develop.
- Impermeable seed coats: Seeds with thick or impermeable seed coats may prevent water and oxygen from reaching the embryo, causing dormancy.
- Chemical inhibitors: Seeds may contain chemical inhibitors that prevent germination until they are broken down or leached out. These inhibitors can be found in the seed coat, endosperm, or embryo.
- Mechanical barriers: Seeds with mechanical barriers, such as a hard fruit or seed case, may prevent water and oxygen from reaching the embryo.
Genetic factors:
- Gene regulation: Dormancy is regulated by genes that control the expression of enzymes and proteins involved in seed germination.
- Environmental cues: Environmental cues, such as temperature or light, can trigger changes in gene expression and promote or break seed dormancy.
- Temperature: Seeds may require specific temperature ranges to germinate, or may be dormant if temperatures are too high or low.
- Light: Some seeds require light to germinate, while others are inhibited by it.
- Water: Seeds may be dormant if the soil is too dry or if they do not receive enough water.
- Oxygen: Seeds may be dormant if the soil or water is deficient in oxygen.
- pH: Seeds may be dormant if the soil pH is too acidic or alkaline.
Physiological factors:
- Immature embryos: Seeds with immature embryos may be dormant until the embryos fully develop.
- Impermeable seed coats: Seeds with thick or impermeable seed coats may prevent water and oxygen from reaching the embryo, causing dormancy.
- Chemical inhibitors: Seeds may contain chemical inhibitors that prevent germination until they are broken down or leached out. These inhibitors can be found in the seed coat, endosperm, or embryo.
- Mechanical barriers: Seeds with mechanical barriers, such as a hard fruit or seed case, may prevent water and oxygen from reaching the embryo.
Genetic factors:
- Gene regulation: Dormancy is regulated by genes that control the expression of enzymes and proteins involved in seed germination.
- Environmental cues: Environmental cues, such as temperature or light, can trigger changes in gene expression and promote or break seed dormancy.
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