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Response to Wounding
Wounding of tomato plants by mechanical injury or chewing by insects releases a factor that triggers accumulation of two proteinase inhibitors-throughout the plant body. These are inhibitors of serine endopeptidase. Pectic oligomeric fragments derived from cell wall can also induce proteinase inhibitor i.e., they act as elicitors. In fact, cell wall fragments are thought to be generalised elicitors of plant defence responses including phytoalexin synthesis in different plants. The pattern of induction of proteinase inhibitor in these fragments in excised plant tissue is quite like that of mechanical injury.
All or None Response A very weak stimulus does not result in an action potential. The stimulus must have a certain strength to evoke an excitation. This is the threshold value
Characteristics of phylum protozoa
Definition and applications
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What two abiotic factors might affect (a) an animal living at the bottom of the sea, (b) a plant growing on a mountainside? (a) The abiotic factors which might
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Define Requirements of Fluid in Postoperative Nutritional Care Extensive fluid losses may occur through vomiting, haemorrhage, diesis, excudate, fever and sweating after a surg
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