Abstract
Experiments were carried out to determine the role of Pratylenchus penetrans (Cobb, 1917) Filip. & Stek. 1941 in the peach replant problem. It is shown that this nematode is a true plant pathogen since it invades and causes necrosis of peach roots in the absence of bacteria and fungi. Necrosis of the root tissue occurs rapidly and appears to take place in advance of the invading nematode. The main mechanism involved in the formation of the lesion is the production of phytotoxic substances through hydrolysis of the cyanophoric β-glucoside, amygdalin. P. penetrans is capable of hydrolyzing this substance in vitro. It is concluded that, although P. penetrans is the most important primary parasite and a true plant pathogen, its main role in peach replant failure appears to be its ability to incite root degeneration by providing extensive infection courts for soil microorganisms.
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Claims 5
Claim · model-written summary
Pratylenchus penetrans invades peach roots and causes necrosis without bacteria or fungi.
- Taxon
- peach
Prunus persicat0 - Interactor
- Pratylenchus penetrans
Pratylenchus penetranst0pathogen - Outcome
- necrosis of peach rootse0
- Qualifier
- in the absence of bacteria and fungie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it invades and causes necrosis of peach roots in the absence of bacteria and fungi”
t0“Pratylenchus penetrans (Cobb, 1917) Filip. & Stek. 1941 in the peach replant problem”
Claim · model-written summary
Peach root tissue necrosis occurs rapidly ahead of invading nematodes.
- Taxon
- peachPrunus persicat0
- Interactor
- Pratylenchus penetransPratylenchus penetranst0pathogen
- Outcome
- Necrosis of the root tissuee0
- Qualifier
- in advance of the invading nematodee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Necrosis of the root tissue occurs rapidly and appears to take place in advance of the invading nematode.”
t0“Pratylenchus penetrans (Cobb, 1917) Filip. & Stek. 1941 in the peach replant problem”
Claim · model-written summary
Lesion formation is attributed to phytotoxic products of amygdalin hydrolysis.
- Taxon
- peachPrunus persicat0
- Interactor
- Pratylenchus penetransPratylenchus penetranst0pathogen
- Compound
- amygdaline0
- Outcome
- formation of the lesione0
- Qualifier
- production of phytotoxic substances through hydrolysise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main mechanism involved in the formation of the lesion is the production of phytotoxic substances through hydrolysis of the cyanophoric β-glucoside, amygdalin.”
t0“Pratylenchus penetrans (Cobb, 1917) Filip. & Stek. 1941 in the peach replant problem”
Claim · model-written summary
Pratylenchus penetrans hydrolyzes amygdalin in vitro.
- Taxon
- peachPrunus persicat0
- Interactor
- Pratylenchus penetransPratylenchus penetranst0pathogen
- Outcome
- hydrolyzing this substance in vitroe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. penetrans is capable of hydrolyzing this substance in vitro.”
t0“Pratylenchus penetrans (Cobb, 1917) Filip. & Stek. 1941 in the peach replant problem”
Claim · model-written summary
The nematode contributes to peach replant failure by making infection courts for soil microorganisms.
- Taxon
- peachPrunus persicat0
- Interactor
- Pratylenchus penetransPratylenchus penetranst0pathogen
- Outcome
- peach replant failuree0
- Qualifier
- providing extensive infection courts for soil microorganismse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“its main role in peach replant failure appears to be its ability to incite root degeneration by providing extensive infection courts for soil microorganisms”
t0“Pratylenchus penetrans (Cobb, 1917) Filip. & Stek. 1941 in the peach replant problem”