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Questions and Answers
Qual é a função do ácido abscÃsico (ABA) em plantas?
Qual é a função do etileno (ET) em plantas?
Quais são as principais funções dos citocininas em plantas?
Qual é a função dos giberelinas (GAs) em plantas?
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Qual é a função dos auxinas em plantas?
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Study Notes
Plant Hormones
Plant hormones are chemical messengers that regulate various physiological processes in plants. There are five main types of plant hormones: Abscisic Acid, Ethylene, Cytokinins, Gibberellins, and Auxins.
Abscisic Acid (ABA)
- Involved in seed dormancy and germination
- Regulates stomatal closure to prevent water loss
- Plays a role in response to stress, such as drought, cold, and high salinity
- Inhibits cell growth and division
Ethylene (ET)
- Involved in fruit ripening and senescence
- Regulates abscission (leaf shedding) and flower senescence
- Stimulates root growth and differentiation
- Involved in response to stress, such as wounding and flooding
Cytokinins
- Promote cell division and growth
- Involved in shoot initiation and development
- Regulate root growth and differentiation
- Play a role in leaf senescence and abscission
Gibberellins (GAs)
- Involved in stem elongation and cell expansion
- Regulate seed germination and seedling growth
- Stimulate cell division and growth
- Involved in flower induction and development
Auxins
- Involved in cell elongation and cell division
- Regulate root growth and differentiation
- Stimulate shoot growth and development
- Play a role in apical dominance and tropisms (e.g., phototropism)
Note: These notes provide a brief overview of the main functions of each plant hormone. Each hormone has a more extensive range of functions, and there is often overlap and interaction between them.
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Description
Learn about the five main types of plant hormones, including Abscisic Acid, Ethylene, Cytokinins, Gibberellins, and Auxins, and their roles in regulating various physiological processes in plants.
