Abstract
Currently, copper is approved as an active substance among plant protection products and is considered effective against more than 50 different diseases in different crops, conventional and organic. Tomato has been cultivated for centuries, but many fungal diseases still affect it, making it necessary to control them through antifungal agents, such as copper, making it the primary form of fungal control in organic farming systems (OFS). The objective of this work was to determine whether exogenous copper applications can affect AOX mechanisms and nitrogen use efficiency in tomato plant grown in OFS. For this purpose, plants were sprayed with ‘Bordeaux’ mixture (SP). In addition, two sets of plants were each treated with 8 mg/L copper in the root substrate (S). Subsequently, one of these groups was also sprayed with a solution of ‘Bordeaux’ mixture (SSP). Leaves and roots were used to determine NR, GS and GDH activities, as well as proline, H2O2 and AsA levels. The data gathered show that even small amounts of copper in the rhizosphere and copper spraying can lead to stress responses in tomato, with increases in total ascorbate of up to 70% and a decrease in GS activity down to 49%, suggesting that excess copper application could be potentially harmful in horticultural production by OFS.
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Claims 4
Claim · model-written summary
Copper supplied to the rhizosphere and by spraying induced tomato stress responses.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- copper sprayinge0
- Outcome
- stress responsese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“even small amounts of copper in the rhizosphere and copper spraying can lead to stress responses in tomato”
e1“two sets of plants were each treated with 8 mg/L copper in the root substrate (S)”
e2“plants were sprayed with ‘Bordeaux’ mixture (SP)”
Claim · model-written summary
Copper treatment raised total ascorbate by up to 70%.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- copper sprayinge1
- Outcome
- total ascorbatee0
- Direction
- increasese0
- Value
- up to 70%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increases in total ascorbate of up to 70%”
e1“even small amounts of copper in the rhizosphere and copper spraying can lead to stress responses in tomato”
Claim · model-written summary
Copper treatment reduced GS activity to 49%.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- copper sprayinge1
- Gene
- GSe0
- Outcome
- GS activitye0
- Direction
- decreasee0
- Value
- down to 49%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a decrease in GS activity down to 49%”
e1“even small amounts of copper in the rhizosphere and copper spraying can lead to stress responses in tomato”
Claim · model-written summary
The authors warn that excess copper could harm organic horticultural production.
- Taxon
- tomatoSolanum lycopersicume1
- Outcome
- excess copper application could be potentially harmful in horticultural production by OFSe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“excess copper application could be potentially harmful in horticultural production by OFS”
e1“stress responses in tomato”
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