ANIMAL PHYSIOLOGY
CHEMICAL SIGNALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Plant hormones may be delivered to target cells through the air
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Plant hormones may be delivered to target cells through a vascular system
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The targets for plant hormones may be located large distances from the cells that produce and secrete hormones
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Detailed explanation-1: -Which of the following characteristics is unique to plant hormones? Select one: Plant hormones may be delivered to target cells through the air The target cells for plant hormones may be located large distances from the cells that produce and secrete the hormones.
Detailed explanation-2: -In plants, hormones travel large throughout the body via the vascular tissue (xylem and phloem) and cell-to-cell via plasmodesmata.
Detailed explanation-3: -Abscisic acid is a ubiquitous plant hormone which plays an important role in the inhibition of seed germination and budding. It is known as the plant stress hormone and is involved in the response of plants to weather stress, such as tolerance to cold and drought.
Detailed explanation-4: -The five major phytohormones are – auxins, gibberellins, cytokinins, ethylene and abscisic acid. There are also other phytohormones that affect the plant’s physiological processes like brassinosteroids, salicylates, jasmonates, strigolactones, etc.