Question

About hormones of plant.....in detail

Answer 1

HEY MATE HERE IS YOUR ANSWER

plant hormones also known as phytohormones are signal molecules produced with plants that occur in extremely low concentrations the Exotic strong control over plant development and can either act locally or in more distant part of this plant plant hormones control all aspects of development from embryogenesis the regulation of organ size, Paragon defence, stress tolerance and through to reproductive development unlike in animals in which hormone production is restricted to specialise glands is plant cell is capable of producing hormones the term phytohormone was coined by went and Timann and used in the title of the book in 1937.

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Answer 2

Hello Friend
Your Ans
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1.The goal of a plant is to germinate, survive, grow, and reproduce (and either exploit or contribute to life in general – see my summary of a future paper in progress here.
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2. The role of the shoot is to create sugars from sunlight, water, and carbon dioxide harvested from the air. It also harvests most of the oxygen needed by the plant for respiration. The shoot may serve as a reserve store for water and minerals. This may be far fetched as a general principle but the storage of water occurs in at least the cactus. The best place for storing all nutrients may be out of harms way in the soil, in the root. The shoot also provides the structure that supports the leaves, flowers, and fruit, but this will not be important here.
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3. The role of the root is to harvest water and minerals from the soil. In order to function, the root also needs to harvest some oxygen from spaces between the soil particles. The root also provides a place for storing reserves of sugar in the form of starch and may even store oxygen. It also anchors the plant in a propitious place for it to grow and prevents it from being physically uprooted by the elements or fauna. The anchoring role of the root will not be important here.
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4. If they face conditions where they have to make a choice, plants will invest in promising new meristematic cells (i.e. those that are functioning well in their role, like young leaves making good amounts of sugar and successfully harvesting oxygen) and withdraw nutrients from mature cells to feed these “babies,” even if that means withdrawing nutrients from mature cells that are functioning “adequately”. There is a cost to the transfer of nutrients from mature to juvenile cells. This cost is measured in the loss of some nutrients during the process. It is true that minerals cannot be destroyed and are usually not excreted. However, they are probably not fully recoverable from a mature cell, leaf, or root, in the same way that they would be if they were merely stored in some kind internal reserve, such as a vacuole within a cell.
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5. There are three general groups of plant hormones. The Growth Hormones are released under long term good growth conditions and are separated into one predominantly synthesized in the shoot and one in the root. The Stress Hormones are released under various kinds of long term stress and are separated into one synthesized predominantly in the shoot and one in the root. Lastly, there are the Shock/Synchronizer Hormones. The idea with the Shock/Synchronizer Hormones is that they are released under rapidly developing stress of any kind or return from stress good conditions, confronting the individual cells, parts of the plant, or the plant as a whole. To elaborate, these are the first hormones released when the physical survival of the cells is under threat or when the cells return to secure environmental and nutrient conditions. They quickly shut a plant or plant part down or restore it to normal functioning. They may also play a secondary role as modulators of the rate of cell metabolism slowing it down to survivable levels according to local conditions, or speeding it up so that full use may be made of current nutrient levels and environmental conditions. In fact, a final climacteric high or sustained level of these hormones may be needed to kick off the synthesis of the stress hormones (GA and Ethylene) on one end, or the growth hormones (Auxin and Cytokinin) on the other.
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6. All plant cells are totipotent not just under the right conditions, such as in tissue culture, but also in the way that they behave in response to environmental and nutrient conditions. That is, a shoot cell will always act somewhat like a root cell, and a root cell will always act somewhat like a shoot cell. In addition, a mature cell will act somewhat like an immature cell, and vice versa. For example, below, it is suggested that just like a shoot meristem cell, when any cell is met with goodenvironmental conditions and more than enough sugar and oxygen to support growth, it will make Auxin or at least a tiny amount of it.
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