1. Fungi can act as an intermediary as a “bridgework” for tree interactions. How
ID: 178804 • Letter: 1
Question
1. Fungi can act as an intermediary as a “bridgework” for tree interactions. How so? 2. Find one of the chemical signaling molecules used to facilitate the interaction and describe its function. 3. How do plants protect themselves from attack against harmful bacteria and fungi? 4. Trees chemically protect themselves against herbivore attack as well. Interestingly enough plants can signal to others that they are under attack. Find such a response mediator and describe how it is initiated and its mode of action for protection. 5. All fruit trees are grafted. Sometimes a process called incompatibility occurs, what is responsible for this rejection?1. Fungi can act as an intermediary as a “bridgework” for tree interactions. How so? 2. Find one of the chemical signaling molecules used to facilitate the interaction and describe its function. 3. How do plants protect themselves from attack against harmful bacteria and fungi? 4. Trees chemically protect themselves against herbivore attack as well. Interestingly enough plants can signal to others that they are under attack. Find such a response mediator and describe how it is initiated and its mode of action for protection. 5. All fruit trees are grafted. Sometimes a process called incompatibility occurs, what is responsible for this rejection?
1. Fungi can act as an intermediary as a “bridgework” for tree interactions. How so? 2. Find one of the chemical signaling molecules used to facilitate the interaction and describe its function. 3. How do plants protect themselves from attack against harmful bacteria and fungi? 4. Trees chemically protect themselves against herbivore attack as well. Interestingly enough plants can signal to others that they are under attack. Find such a response mediator and describe how it is initiated and its mode of action for protection. 5. All fruit trees are grafted. Sometimes a process called incompatibility occurs, what is responsible for this rejection?
Explanation / Answer
1. Mycorrhiza fungus form symbiotic relation with tree root Mycorrhiza help in fixation of nitrogen beneficial for plant it also secrete hormone for root tip growth
2. Most signal molecules are secreted by signalling cell into extracellular space by exocytosis. Target cell responds to signalling molecules by binding it with receptor when they bind ligand cascade of reaction occur.
3.Plant protect them selves by secreting chemical compound unpalatable to herbivores they secrete bark which is not eaten by animals
4.Incompatability occur when
1. there is virus in one part
2. when weak plant is grafted on strong root
3. Genetic incompatability
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