Induced Resistance
- There is a diverse array of signals that stimulate IR.
- IR is a sensitization process that primes the plant for more rapid deployment of defenses.
- When integrated into good agricultural practices, IR can both enhance plant productivity and resistance to disease.
- Has energetic costs
Types of induced resistance
- Local acquired resistance (LAR)
- Systemic acquired resistance (SAR)
- Systemic gene silencing (SGS)
- Induced systemic resistance (ISR)
- Systemic wounding response (SWR)
Systemic Acquired Resistance
- Controlled by salicylic acid (SA)
- Broad resistance
- More durable
- Classically effective against biotrophic pathogens
- Relies on the plants endogenous defenses
More on induced resistance?
When a plant is inoculated with a pathogen, and after a time interval is subjected to a secondary (āchallengeā) inoculation, reduced disease symptoms develop, i.e. the induced plant becomes more resistant than the normal, non-induced plant.
Ongoing scientific research suggests that using more than one method of activating SAR may employ all three of the plants transduction pathways and amplify the plantās ability to resist pests and accelerate growth with reduced fertilizer and pesticide inputs.
It has often been suggested that disease resistance is associated with fitness costs
and that plants have evolved inducible defense mechanisms because it is too costly
to have defense responses switched on all the time
Stress never āhelps the plantā but it redirects energy otherwise used for growth towards inducible defense mechanisms (AKA secondary metabolite production like cannabinoids and terpenoids) and that may "help the plant."
If that is your end goal.
If you choose the right component in the right amount at the right time you will boost even a resistant strains immune system to be even more resilient to mold ect.
Different amounts at different times have different effects.
Sometime things are geared for pest resistance, some time they are geared for an immune response, sometime things are geared for pest elimination.
You have to be careful not to trigger the wrong thing at the wrong time or you can end up with a stunted plant.
It really is a simple but yet complicated process, so many things happening on a molecular level, all different kinds of signaling and cross talk.
BTW
Cross talking is kinda like when 2 beneficial things added together cancel each other out completely, they are then known as antagonistic in behavior.
Think of it like thisā¦
If a plant puts too much energy into fighting of bugs and pathogens it has little energy for growth.
Therefore the plant may become stunted and not grow until it believes the threat has subsided.
Then it will start to grow again.
These actions are very strain/cultivar dependent.
Another issue also presents in that some genetics (particularly some landraces and poly hybrids) are prone to turning hermaphrodite under any type of stress.
As a result, stress induction might be the last thing a grower wants to do with some genetics.
Please keep that in mind, know your genetics before you stress them, or at least be prepared to face the consequences.
anthraquinones or sumtin
