BIOLOGY
HORMONES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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flow of hydrogen ions out of the cell wall into the cytoplasm.
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movement of water through the stomata
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flow of hydrogen ions from the cytoplasm into the cell wall.
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division of cell du to the internal pressure of water
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Detailed explanation-1: -The plant hormone auxin is well known to stimulate cell elongation via increasing wall extensibility. Auxin participates in the regulation of cell wall properties by inducing wall loosening. Here, we review what is known on cell wall property regulation by auxin.
Detailed explanation-2: -IAA is transported from its sites of synthesis and storage to other tissues throughout the plant. Auxin transport can occur either via the phloem or by a cell-to-cell pathway called polar auxin transport. Polar auxin transport requires energy and proceeds at a rate of 5 to 20 mm/h.
Detailed explanation-3: -Auxin loosens the meshwork of cellulose fibers and matrix polysaccharides by stimulating the transport of H+ ions into the cell wall. The resulting decrease in pH activates cell wall proteins called expansins, which alter the hydrogen bonding between the matrix polysaccharides that link the cellulose fibers together.
Detailed explanation-4: -Indole acetic acid (IAA) is one of the auxin plant hormone. IAA induces cell elongation and the mechanical attributes of the cell walls get altered after the induction of IAA. This mechanism is based on two hypotheses, i.e., acid growth theory, and enzyme-linked cell wall loosening.