Question

As vacuoles hold water, so if a plant is not watered, then won't the vacuole wear out? If it does, then won't the lysosome digest it (taking in consideration it's function)?

Answer 1

When plant is not watered, it uses water from the vacuoles of the plant cells. When vacuoles become out of water, the cell becomes dehydrated and hence, the cell dies. Lysosomes do not act in this condition (because lysosomes digest the cell only when the plasma membrane is ruptured and the cell organelles become out of order).
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Answer 2

What are Lysosomes?

Lysosomes are the main digestive compartment of the cell. As such, they contain a variety of enzymes capable of degrading different types of biological material including nucleic acids, lipids and proteins among others.

They can be found in animal cells and some plant cells (occurring as vacuoles) and are capable of breaking down various types of macromolecules brought in to the cell to be degraded. Most of these macromolecules are either damaged or have completed their life cycle and are no longer useful.

In addition to these macromolecules, lysosomes also serve to break down cells once they die. While they can be found in almost all cells in animals (except red blood cells) they are particularly abundant in tissues/organs that are involved in high enzymatic reactions. These include such tissues/organs as the liver, kidney, macrophages and pancreas among a few others. Cells of these tissues/organs contain abundant lysosomes.

 

* The name lysosome originated from Greek words Lysis (meaning destroy/dissolve) and Soma (meaning body)

* Animal cells may contain numerous lysosomes (several hundred) plant and yeast cells typically have a single, large lysosome (vacuole)

Cell Structure by Public Domain, https://commons.wikimedia.org/w/index.php?curid=31246542Save
Types of Lysosomes

There are two main types. These include:

 

Primary lysosomes - are formed from Golgi apparatus appearing as small vesicles. Although primary lysosomes are popular on Golgi apparatus, they also occur as granulocytes and monocytes. These lysosomes are surrounded by a single phospholipid layer and contain acid hydrolases.

The pH value of the acid in these vesicles is important in that its changes activate or deactivate the enzymes. Ultimately, most of the primary granules will fuse with phagosomes, which results in the formation of secondary lysosomes.

 

Secondary lysosomes - are formed when primary lysosomes fuse with phagosomes/pinosome (they are also referred to a endosomes). The fusion also causes the previously inactive enzymes to be activated and capable of digesting such biomolecules as nucleic acids and lipids among others.