Ⅱ. 식물병의 성립 - Daum

Ⅱ. 식물병의 성립 - Daum

. ? 1. !!! (Horsfall and Dimond, 1959)Horsfall and Dimond, 1959) : (Horsfall and Dimond, 1959)disease) , (dynamic)dynamic)) , , . : (dynamic)symptom)

- (dynamic)injury) : , , , , - (dynamic)disorder) : - : . (Horsfall and Dimond, 1959) )

(Horsfall and Dimond, 1959) ). . 1. 2. 1. Horsfall Dinomd : , ,

Stakman - , , , , - (non-infectious disease) or non-infectious disease) or (non-infectious disease) or non-parasitic disease) - (non-infectious disease) or insects), (non-infectious disease) or nematodes), (non-infectious disease) or mited), , (non-infectious disease) or parasitic plant), (non-infectious disease) or algae), (non-infectious disease) or slime molds), (non-infectious disease) or bacteria), (non-infectious disease) or fungi), (non-infectious disease) or phytoplasma), (non-infectious disease) or spiroplasma) - virus, (non-infectious disease) or viroid)

-1. - (dynamic)pathogen) : - (dynamic)pathogen) : - : , (dynamic) ) - ? * , * 20 2 7 2 7 7

7 -1. - : , * (dynamic)non-infec)tious disease) * (dynamic)non-parasitic) disease) * (dynamic)physiologic)al disease) - :

, , , , * (dynamic)infec)tious disease) * (dynamic)parasitic) disease) 20 2 7 2 7 7 8 20 2 7 2 7 7

9 20 2 7 2 7 7 10 (dynamic) ) - -

- - (dynamic) ), (dynamic) ), (dynamic) ), (dynamic) ), - (dynamic) : 0.6~3.5 , : 0.3~1.0 )

- - - , (dynamic)host) - , - (dynamic)latent virus)

* (non-infectious disease) or infectious disease) or (non-infectious disease) or parasitic disease) * ( , parasite)) - * ( , parasitism)) - - : (non-infectious disease) or root nodule bacteria), (non-infectious disease) or , mycorrhizal fungi) (non-infectious disease) or , symbiosis)

( , e)sse)ncial cause)) ( , occasional cause), prom)oting age)ncy)) ( ) ( ) - ex) (non-infectious disease) or Magnaporthe grisea; syn: Pyricularia grisea) - ex) (non-infectious disease) or Rhizopus stolonifer)

(pathoge)nicity)) : . : . , . , , , . . :

(aggre)ssive)ne)ss) - (non-infectious disease) or colonization) (non-infectious disease) or affinity) . a measure of the rate of growth or reproduction of the isolate, or other attributes that confer ability to produce a given size lesion in less time or produce more inoculum for infection of other tissues. (virule)nce)) - the relative capacity of a given isolate of a pathogen to produce severe disease.

* Rhizobium leguminosarum Frank(non-infectious disease) or ) . Olpidium viciae Kusano (non-infectious disease) or Oenothera), (non-infectious disease) or Taraxacum), (non-infectious disease) or Impatiens), (non-infectious disease) or Physalis) (non-infectious disease) or zoospore) . Lophodermium pinastri(non-infectious disease) or ) * (non-infectious disease) or oidium) . . (non-infectious disease) or haustorium)

. Helicobasidium mompa(non-infectious disease) or ) : (non-infectious disease) or heterotrophic) . (non-infectious disease) or biotrophic) (non-infectious disease) or saprotropic) . ( , saprophy)te)) - . * Saprophyte - typically do not cause disease - may predispose plants to disease by exerting stress

(non-infectious disease) or e.g. exclusion of light by slime molds or sooty molds) ( , pe)rthophy)te)) - , . ( , parasite)) - . ( , sy)m)biont) - , , .

( , obligate) parasite) or holoparasite)) - (non-infectious disease) or , , ). - . (non-infectious disease) or : , , ) * Obligate parasite - require a living host - "good" parasites rarely kill host high level association (non-infectious disease) or highly evolved) - may feed with specialized

- ex) viruses, viroids, phytoplasmas, fastidious bacteria, nematodes, protozoa, downy mildews, powdery mildews, and rusts. ( , nonobligate) parasite)) - . * , (non-infectious disease) or ). ( , facultative) parasite))

- , * Facultative parasite - non-obligate associations - may be colonize a host due to a compromised condition (non-infectious disease) or stress) ( , facultative) saprophy)te)) - , (non-infectious disease) or = , semibiotroph) * - , .

* Facultative saprophyte - non-obligate parasites - live most of their live as parasites - may live saprophytically in the absence of a host - may be more destructive than obligate parasites due to the involvement of enzymes that degrade plant tissue. * - , , .

- . , , . virus - , . : (Koch's postulate)s) .

(non-infectious disease) or ). . . , , . 2. : (host) (non-infectious disease) or , diseased plant) . : (non-infectious disease) or susceptible condition)

(susce)pt) . . ( ) : ( , disposition) - * Puccinia graminis tritici(non-infectious disease) or ) Berberis Berberis koreana(non-infectious disease) or ) . cuticle .

( , pre)disposition) - , , : (non-infectious disease) or susceptible plants) * , . ( , susce)ptibility)) :

, : , , . . (non-infectious disease) or disposition)

(non-infectious disease) or suscept) (non-infectious disease) or predisposition) (non-infectious disease) or susceptibility) (non-infectious disease) or host) (non-infectious disease) or parasite) (non-infectious disease) or aggressiveness)

(non-infectious disease) or pathogen) (non-infectious disease) or virulence) (non-infectious disease) or pathogenicity) : - - . * (non-infectious disease) or disease triangle)

(non-infectious disease) or ) - , (non-infectious disease) or ) - (non-infectious disease) or ) - : - (non-infectious disease) or )

pH . . Fig. Wilting and stunting are common field symptoms of clubroot disease of chinese cabbage (non-infectious disease) or left) and Enlarged roots appearing like spindles or club (non-infectious disease) or right) caused by Plasmodiophora brassicae.

: - (non-infectious disease) or )(non-infectious disease) or ) (non-infectious disease) or ) . Fig. Pink snow mold on bentgrass (non-infectious disease) or Agrostis palustris) golf green. : -

. : - , .

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