Abstract
Summary Potato tubers (cvs Cara and Bintje) were grown in compost in a glasshouse and immature tubers harvested 57, 68 and 78 days after planting. Two moisture levels were imposed after the first harvest by disconnecting the water supply to one of the treatments and allowing the soil in that treatment to dry naturally. Tubers from wetter compost (59.4% moisture holding capacity) were more resistant to Phytophthora infestans than those from drier compost (14.7% moisture holding capacity) 78 days after planting. The potential causes of this difference were investigated. Aqueous extracts of wet compost did not inhibit the growth of P. infestans. The susceptibility of the internal tuber tissue, from which the periderm had been removed, was different to whole tuber susceptibility. The internal tissue of tubers from wet compost was more susceptible (cv. Cara), or as susceptible (cv. Bintje) as that of tubers from dry compost 78 days after planting. Fungi were isolated from the surface of whole tubers and there were no differences between the populations of potentially antagonistic fungal genera on tubers from wet and dry compost. As the experiment progressed, the number of bacteria per gram fresh weight on tubers grown in wet compost increased, whereas that on tubers from drier compost decreased (cv. Bintje) or remained similar (cv. Cara). There were significantly ( P = 0.008) more bacteria on the surface of tubers from wet compost 78 days after planting. When P. infestans was co‐cultured in Petri dishes with randomly selected tuber surface bacteria, some isolates (≤ 16.7%) inhibited the growth of the fungus. The percentage of the total bacterial population that was antagonistic to P. infestans was not significantly affected by soil moisture level ( P = 0.368). The greater numbers of bacteria, of which a proportion are antagonistic to P. infestans , on the surface of tubers grown in wet compost may account for the greater resistance to tuber blight in that instance.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Tubers from wetter compost were more resistant to P. infestans than those from drier compost at 78 days.
- Treatment
- wetter composte0
- Interactor
- Phytophthora infestans
Phytophthora infestanse0pathogen - Outcome
- resistant to Phytophthora infestanse0
- Direction
- more resistante0
- Qualifier
- 78 days after plantinge0
- Comparator
- drier composte0
TuberOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tubers from wetter compost (59.4% moisture holding capacity) were more resistant to Phytophthora infestans than those from drier compost (14.7% moisture holding capacity) 78 days after planting”
Claim · model-written summary
Wet compost extracts did not inhibit P. infestans growth.
- Taxon
- potato
Solanum tuberosumt0 - Interactor
- P. infestansPhytophthora infestanse0pathogen
- Outcome
- growth of P. infestanse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Aqueous extracts of wet compost did not inhibit the growth of P. infestans”
t0“potato”
Claim · model-written summary
Cara tuber internal tissue from wet compost was more susceptible than tissue from dry compost.
- Taxon
- potatoSolanum tuberosumt0
- Material
- cv. Carae0
- Treatment
- wet composte0
- Outcome
- internal tissue of tuberse0
- Direction
- more susceptiblee0
- Comparator
- dry composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The internal tissue of tubers from wet compost was more susceptible (cv. Cara), or as susceptible (cv. Bintje) as that of tubers from dry compost 78 days after planting”
t0“potato”
Claim · model-written summary
Bintje tuber internal tissue from wet compost was as susceptible as that from dry compost.
- Taxon
- potatoSolanum tuberosumt0
- Material
- cv. Bintjee0
- Treatment
- wet composte0
- Outcome
- internal tissue of tuberse0
- Direction
- as susceptiblee0
- Comparator
- dry composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The internal tissue of tubers from wet compost was more susceptible (cv. Cara), or as susceptible (cv. Bintje) as that of tubers from dry compost 78 days after planting”
t0“potato”
Claim · model-written summary
Potentially antagonistic fungal genera populations did not differ between wet and dry compost tubers.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- populations of potentially antagonistic fungal generae0
- Direction
- no differencese0
- Comparator
- wet and dry composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no differences between the populations of potentially antagonistic fungal genera on tubers from wet and dry compost”
t0“potato”
Claim · model-written summary
Surface bacteria on Bintje tubers increased under wet compost as the experiment progressed.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- wet composte0
- Outcome
- number of bacteria per gram fresh weighte0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of bacteria per gram fresh weight on tubers grown in wet compost increased”
t0“potato”
Claim · model-written summary
Surface bacteria on Bintje tubers decreased under drier compost.
- Taxon
- potatoSolanum tuberosumt0
- Material
- cv. Bintjee0
- Treatment
- drier composte0
- Outcome
- that on tuberse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that on tubers from drier compost decreased (cv. Bintje)”
t0“potato”
Claim · model-written summary
Surface bacteria on Cara tubers stayed similar under drier compost.
- Taxon
- potatoSolanum tuberosumt0
- Material
- cv. Carae0
- Treatment
- drier composte0
- Outcome
- that on tuberse0
- Direction
- remained similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“that on tubers from drier compost decreased (cv. Bintje) or remained similar (cv. Cara)”
t0“potato”
Claim · model-written summary
Wet compost tubers had significantly more surface bacteria at 78 days.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- wet composte0
- Outcome
- bacteria on the surface of tuberse0
- Direction
- moree0
- Qualifier
- 78 days after plantinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significantly ( P = 0.008) more bacteria on the surface of tubers from wet compost 78 days after planting”
t0“potato”
Claim · model-written summary
Up to 16.7% of sampled tuber surface bacterial isolates inhibited P. infestans growth.
- Taxon
- potatoSolanum tuberosumt0
- Outcome
- inhibited the growth of the funguse0
- Value
- ≤ 16.7%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some isolates (≤ 16.7%) inhibited the growth of the fungus”
t0“potato”
Claim · model-written summary
Soil moisture did not significantly affect the proportion of bacteria antagonistic to P. infestans.
- Taxon
- potatoSolanum tuberosumt0
- Treatment
- soil moisture levele0
- Interactor
- P. infestansPhytophthora infestanse0pathogen
- Outcome
- percentage of the total bacterial population that was antagonistic to P. infestanse0
- Direction
- not significantly affectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of the total bacterial population that was antagonistic to P. infestans was not significantly affected by soil moisture level ( P = 0.368)”
t0“potato”
Claim · model-written summary
Greater numbers of antagonistic surface bacteria may explain the greater blight resistance of wet compost tubers.
- Taxon
- potatoSolanum tuberosumt0
- Interactor
- P. infestansPhytophthora infestanse0pathogen
- Outcome
- greater resistance to tuber blighte0
- Qualifier
- greater numbers of bacteriae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The greater numbers of bacteria, of which a proportion are antagonistic to P. infestans , on the surface of tubers grown in wet compost may account for the greater resistance to tuber blight in that instance”
t0“potato”