The document discusses the different types of interactions between plants and microbes. It notes that plants experience both beneficial and harmful stress. There are two main types of plant-microbe interactions: pathogenic relationships, where the microbe attacks the plant and harms it, such as the tobacco mosaic virus causing chlorosis in tobacco leaves; and symbiotic relationships, which can be mutualistic, commensalistic, or parasitic, involving long-term biological interactions between the plant and microbe.

2.  Plant are non motile creature, so they have go under many natural stress.
 Stress can be beneficial for them and can be harmful.
 The plant and microbes stress or interaction between them can be done in many
ways.
 Plant acts as host for many interactions with microbes.

3.  1. Pathogenic relationships:– in this type of relationship the plant get attacked by
microbes in many ways. There is always a war going on between the plant cell
defence and microbes attack.
 In this type of relationship or interaction the plant get harm every time they
interact wethere it could the health or loss of energy in defence. Sy
 Example – Tobacco Mosaic virus it harm the tobacco plant by chlorosis in leaf.
 2. Symbiotic relationships:– it is any type of close and long term biological
interaction between two different biological organism.

4.  It can be three types :-
 A) Mutualism
 B) commensalism
 C) parasitic
 Mutualism-