Abstract
After the seedlings and in vitro seedling twigs of pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)(Bursaphelenchus xylophilus),the content changes of water, free proline and chlorophyll in host plant and the mutual relations between these changes were studied. The results showed that the relative water content was decreased gradually in the stems of the hosts after infected by PWN and it was faster at the late stage than at the early stage. The water changes in the needles were behind those in the stems. Before the infected symptoms on the needles appeared, the relative water content in the needle did not fall down, but it had decreased obviously in the stems. The obvious decrease of the relative water content in the needle appeared at late stage of disease development. The reduction of contents of free proline and chlorophyll was consistent with the decrease of the relative water content in the needles. The water regime in the needles was the key factor influencing the contents of free proline and chlorophyll. A comparison between the wilt pine seedlings caused by drought and those caused by PWN showed that there were distinct differences in the ways of wilt and the water content changes in the stems and needles.
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Claims 8
Claim · model-written summary
Relative water content in pine stems decreased gradually after infection by pine wood nematode, faster at the late stage.
- Taxon
- Pinus massoniana
Pinus massonianae0 - Organ / stage
- stemse1
- Treatment
- infected by PWNe1
- Interactor
- PWNe1pathogen
- Outcome
- relative water contente1
- Direction
- decreasede1
- Qualifier
- faster at the late stage than at the early stagee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e1“the relative water content was decreased gradually in the stems of the hosts after infected by PWN and it was faster at the late stage than at the early stage”
Claim · model-written summary
Water changes in pine needles lagged behind those in the stems.
- Taxon
- Pinus massonianaPinus massonianae0
- Organ / stage
- needlese6
- Outcome
- water changes in the needlese6
- Qualifier
- behind those in the stemse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e6“The water changes in the needles were behind those in the stems”
Claim · model-written summary
Before infection symptoms appeared on the needles, relative water content in pine needles did not fall.
- Taxon
- Pinus massonianaPinus massonianae0
- Organ / stage
- needlee2
- Outcome
- relative water content in the needlee2
- Direction
- did not fall downe2
- Qualifier
- Before the infected symptoms on the needles appearede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e2“Before the infected symptoms on the needles appeared, the relative water content in the needle did not fall down”
Claim · model-written summary
Before needle symptoms appeared, relative water content decreased obviously in pine stems.
- Taxon
- Pinus massonianaPinus massonianae0
- Organ / stage
- stemse3
- Outcome
- relative water contente3
- Direction
- decreased obviouslye3
- Qualifier
- Before the infected symptoms on the needles appearede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e3“Before the infected symptoms on the needles appeared, the relative water content in the needle did not fall down, but it had decreased obviously in the stems”
Claim · model-written summary
The obvious decrease in relative water content in pine needles appeared at late stage of disease development.
- Taxon
- Pinus massonianaPinus massonianae0
- Organ / stage
- needlee4
- Outcome
- relative water content in the needlee4
- Direction
- decreasee4
- Qualifier
- at late stage of disease developmente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e4“The obvious decrease of the relative water content in the needle appeared at late stage of disease development”
Claim · model-written summary
Free proline and chlorophyll contents in pine needles fell in line with the decrease in needle relative water content.
- Taxon
- Pinus massonianaPinus massonianae0
- Organ / stage
- needlese5
- Outcome
- contents of free proline and chlorophylle5
- Direction
- reductione5
- Qualifier
- consistent with the decrease of the relative water content in the needlese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e5“The reduction of contents of free proline and chlorophyll was consistent with the decrease of the relative water content in the needles”
Claim · model-written summary
Water regime in pine needles is the key factor influencing free proline and chlorophyll contents.
- Taxon
- Pinus massonianaPinus massonianae0
- Organ / stage
- needlese7
- Outcome
- contents of free proline and chlorophylle7
- Qualifier
- The water regime in the needles was the key factore7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e7“The water regime in the needles was the key factor influencing the contents of free proline and chlorophyll”
Claim · model-written summary
Pine seedlings wilted by pine wood nematode differed from drought-wilted seedlings in stem and needle water content changes.
- Treatment
- caused by PWNe7
- Interactor
- PWNe7pathogen
- Outcome
- water content changes in the stems and needlese7
- Comparator
- caused by droughte7
PinusNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pine (Pinus massoniana) were inoculated with pine wood nematode(PWN)”
e7“A comparison between the wilt pine seedlings caused by drought and those caused by PWN showed that there were distinct differences in the ways of wilt and the water content changes in the stems and needles”