Term
| 2 sets of bacteria that suppress plant disease |
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Definition
| Bacillus and Pseudomonas species |
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Term
| Pseudomonad characteristics (3) |
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Definition
1. aggressive root colonization
2. induce systemic resistance
3. antibiotic (some controlled by quorum-sensing) |
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Term
| Role of 2,4-diacetylphloroglucinol |
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Definition
| suppress tobacco black root rot |
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Term
|
Definition
| sporangium --> zoospore --> cyst --> mycelium --> oospore/chlamydospore/sporangium |
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Term
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Definition
Zwittermicin = antibiotic
-blocks step that inhibit cyst from making mycelium
-no ZmA = less biocontrol activity
-add ZmA = restore disease control |
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Term
| problems of initial screen on plants (greenhouse/field efficacy) |
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Definition
| strains inhibit pathogen with antibiotic |
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Term
| problem with initial screen for antibiosis (inhibition of pathogen) |
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Definition
| lack biocontrol efficacy in greenhouse/field |
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Term
| positive effects of PGPR (2) |
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Definition
1. bioavailability of N,P, Fe
2. plant hormone manipulation
(increase auxin,cytokinin,gibberellins/decrease ethylene) |
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Term
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Definition
| alpha-proteobacterium that fixes N, motile, forms enlarged cyst-like structures, produces IAA, PGPR activity may relate to N-fixation and IAA |
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Term
|
Definition
1. fixes N for plants N-limited
2. reports of increased yields |
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Term
|
Definition
1. promotes growth in rich/fertilized soil
2. can't account for increase yield
3. doesn't excrete much ammonia
4. regulation = only fixes N when it needs it |
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Term
|
Definition
| Aerobic denitrification, heterotrophic nitrification, and NO synthase (NOS) |
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Term
|
Definition
nap genes responsible to make NO
NO3- to NO2- to NO + N2O |
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Term
| heterotrophic nitrification |
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Definition
| NH4+ oxidized to NO3- with NO produced at intermediate stag |
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Term
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Definition
| arginine + O2 = L-citrulline + NO |
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Term
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Definition
LR- lateral roots that extend horizontally from primary root
AR-adventitious root that are located in places roots normally don't exist |
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Term
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Definition
| induces crown gall (not source of all galls), doesn't infect monocots, wide host range |
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Term
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Definition
| present in soil, plants must be wounded for infection, galls due to hormone overproduction, galls produce opines that agro can use |
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