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Phytohormones in Crop Development

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Ethylene

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Ethylene is known for its role in fruit ripening and the dropping of leaves and fruit. It also promotes senescence and abscission.

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Salicylic Acid

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Salicylic acid plays a role in plant resistance to pathogens and is involved in the establishment of systemic acquired resistance.

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Gibberellins

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Gibberellins promote stem and leaf growth by stimulating cell division and elongation. They also break seed dormancy and induce flowering in some plants.

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Cytokinins

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Cytokinins promote cell division and growth, delay the aging of plant tissues, and can work with auxins to stimulate differentiation.

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Brassinosteroids

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Brassinosteroids are essential for plant growth and development, promoting cell expansion, cell division, and differentiation, similar to auxins and gibberellins.

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Strigolactones

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Strigolactones inhibit shoot branching and help stimulate the association of roots with mycorrhizal fungi.

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Auxins

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Auxins stimulate stem elongation, root growth, and differentiation. They also play a role in phototropism and gravitropism.

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Jasmonates

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Involved in plant responses to stress and wounding, jasmonates also regulate growth and reproductive processes.

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Abscisic Acid (ABA)

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Abscisic acid functions mainly to inhibit growth, promote dormancy and enable plants to withstand stress conditions like drought.

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Indole-3-Acetic Acid (IAA)

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IAA is the principal auxin in plants and is involved in cell elongation, root formation, and the coordination of many growth and behavioral processes.

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Triacontanol

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Triacontanol is a natural fatty alcohol that has been shown to enhance photosynthesis, increase plant growth, and improve crop yields.

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Florigen

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Florigen is a hypothetical hormone-like molecule that promotes flowering in plants in response to photoperiod.

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Zeatin

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A type of cytokinin that promotes cell division and influences other processes like nutrient mobilization.

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Gibberellic Acid

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One of the most common gibberellins that stimulate plant growth and seed germination by enhancing the breakdown of starches in seeds.

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1-Aminocyclopropane-1-Carboxylic Acid (ACC)

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ACC is not a phytohormone itself but a direct precursor of ethylene, an important phytohormone involved in fruit ripening and the response to stress.

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