Abstract
Summary Soil solarisation enhances plant growth even in the absence of known major pathogens. This phenomenon is known as increased growth response (IGR). Corn, cucumber, sorghum, tobacco and tomato plants under controlled conditions revealed distinct IGR in solarised soil as compared to control non‐treated soil. IGR was recorded in shoots of tomato ( Lycopersicon esculentum Mill. cv. Rehovot 13) seedlings, 15 days after transplanting and in roots only two weeks later. Detailed studies on the third true tomato leaf showed significantly higher levels of chlorophyll and protein contents in plants from solarised soil as compared to those from the control. In addition, the degradation of these compounds, decrease of net photosynthesis at near‐saturation light intensity and of photochemical yield with ageing were delayed in plants growing in solarised soil as compared to the control. The ratio of variable to maximal chlorophyll fluorescence was independent of soil treatment and was comparable to normal levels measured in other plants. Therefore, no apparent environmental stress seems to be involved in either of the soil‐plant systems. It is concluded that the initial IGR in solarised soil is independent of improved root growth. Delayed leaf senescence appeared to be a plant response contributing to IGR.
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Claims 13
Claim · model-written summary
Corn showed increased growth response in solarised soil relative to untreated soil.
- Taxon
- Corn
Zea mays subsp. mayse0 - Treatment
- solarised soile0
- Outcome
- IGRe0
- Direction
- distinct IGRe0
- Comparator
- control non‐treated soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn, cucumber, sorghum, tobacco and tomato plants under controlled conditions revealed distinct IGR in solarised soil as compared to control non‐treated soil”
Claim · model-written summary
Cucumber showed increased growth response in solarised soil relative to untreated soil.
- Taxon
- cucumber
Cucumis sativuse0 - Treatment
- solarised soile0
- Outcome
- IGRe0
- Direction
- distinct IGRe0
- Comparator
- control non‐treated soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn, cucumber, sorghum, tobacco and tomato plants under controlled conditions revealed distinct IGR in solarised soil as compared to control non‐treated soil”
Claim · model-written summary
Sorghum showed increased growth response in solarised soil relative to untreated soil.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn, cucumber, sorghum, tobacco and tomato plants under controlled conditions revealed distinct IGR in solarised soil as compared to control non‐treated soil”
Claim · model-written summary
Tobacco showed increased growth response in solarised soil relative to untreated soil.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- solarised soile0
- Outcome
- IGRe0
- Direction
- distinct IGRe0
- Comparator
- control non‐treated soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn, cucumber, sorghum, tobacco and tomato plants under controlled conditions revealed distinct IGR in solarised soil as compared to control non‐treated soil”
Claim · model-written summary
Tomato showed increased growth response in solarised soil relative to untreated soil.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- solarised soile0
- Outcome
- IGRe0
- Direction
- distinct IGRe0
- Comparator
- control non‐treated soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn, cucumber, sorghum, tobacco and tomato plants under controlled conditions revealed distinct IGR in solarised soil as compared to control non‐treated soil”
Claim · model-written summary
In tomato seedlings, increased growth response occurred in shoots 15 days after transplanting and in roots two weeks later.
- Taxon
- tomatoSolanum lycopersicume1
- Material
- cv. Rehovot 13e1
- Organ / stage
- seedlingse1
- Outcome
- IGR was recorded in shootse1
- Qualifier
- in roots only two weeks latere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“IGR was recorded in shoots of tomato ( Lycopersicon esculentum Mill. cv. Rehovot 13) seedlings, 15 days after transplanting and in roots only two weeks later”
Claim · model-written summary
The third true tomato leaf had significantly higher chlorophyll and protein contents after soil solarisation than in controls.
- Taxon
- tomatoSolanum lycopersicume2
- Organ / stage
- third true tomato leafe2
- Treatment
- solarised soile2
- Outcome
- chlorophyll and protein contentse2
- Direction
- highere2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Detailed studies on the third true tomato leaf showed significantly higher levels of chlorophyll and protein contents in plants from solarised soil as compared to those from the control”
Claim · model-written summary
Degradation of chlorophyll and protein was delayed with leaf aging in plants grown in solarised soil relative to controls.
Verbatim
e3“the degradation of these compounds, decrease of net photosynthesis at near‐saturation light intensity and of photochemical yield with ageing were delayed in plants growing in solarised soil as compared to the control”
e2“chlorophyll and protein contents”
Claim · model-written summary
The age-related decrease of net photosynthesis was delayed in solarised soil relative to control soil.
Verbatim
e3“decrease of net photosynthesis at near‐saturation light intensity and of photochemical yield with ageing were delayed in plants growing in solarised soil as compared to the control”
Claim · model-written summary
The age-related decline of photochemical yield was delayed in solarised soil relative to control soil.
Verbatim
e3“decrease of net photosynthesis at near‐saturation light intensity and of photochemical yield with ageing were delayed in plants growing in solarised soil as compared to the control”
Claim · model-written summary
The ratio of variable to maximal chlorophyll fluorescence was independent of soil treatment and comparable to normal plant levels.
Verbatim
e4“The ratio of variable to maximal chlorophyll fluorescence was independent of soil treatment and was comparable to normal levels measured in other plants”
Claim · model-written summary
The authors concluded that initial increased growth response in solarised soil is independent of improved root growth.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- solarised soile5
- Outcome
- initial IGRe5
- Direction
- independente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“It is concluded that the initial IGR in solarised soil is independent of improved root growth”
e0“tomato plants”
Claim · model-written summary
The authors interpreted delayed leaf senescence as contributing to increased growth response.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- IGRe6
- Qualifier
- Delayed leaf senescencee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Delayed leaf senescence appeared to be a plant response contributing to IGR”
e0“tomato plants”
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