Abstract
Plant-based pigments have been used as substances to improve crop yield and quality, but the mechanisms of their action on plant growth and stress tolerance are not well understood. The objective of this study was to investigate effects of two formulations of plant-based copper chlorophyllin (Cu-Chl) with and without synthetic paraffinic oil. These formulations, referred to as B18-0074 and B18-0075, were applied as a soil drench plus foliar or a foliar-only application. We investigated their impact on physiological responses of tomato plants under prolonged drought stress conditions. In addition, we examined photosynthetic impacts associated with the application of Cu-Chl formulations. B18-0074 increased leaf photosynthetic rate (Pn) by 8.8% with soil plus foliar application and 18.6% with foliar application relative to the control under drought stress at day 21. Similarly, B18-0075 increased Pn by 16.9% with soil plus foliar application and 24.6% with foliar application relative to the control under drought stress at day 21. The application of the two Cu-Chl–containing products increased leaf antioxidant enzyme catalase (CAT) and ascorbate peroxidase (APX) activity, as well as glutathione (GSH) content. The two products also increased leaf soluble sugars and proline content, indicating improvement of osmotic adjustment. Soil plus foliar and foliar application only of B18-0075 increased root biomass but did not consistently affect plant shoot growth. The results of this study suggest that application of Cu-Chl in combination with synthetic paraffinic oil may improve photosynthetic function, osmotic adjustment, antioxidant defense capacity, and root growth of tomato plant grown under drought stress conditions.
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Claims 8
Claim · model-written summary
B18-0074 applied as soil plus foliar increased leaf photosynthetic rate by 8.8% relative to the control under drought stress at day 21.
- Taxon
- tomato plants
Solanum lycopersicumt0 - Organ / stage
- leafe1
- Treatment
- B18-0074e1
- Outcome
- leaf photosynthetic rate (Pn)e1
- Direction
- increasede1
- Value
- 8.8%e1
- Qualifier
- with soil plus foliar applicatione1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e1“B18-0074 increased leaf photosynthetic rate (Pn) by 8.8% with soil plus foliar application and 18.6% with foliar application relative to the control under drought stress at day 21”
Claim · model-written summary
B18-0074 applied as foliar increased leaf photosynthetic rate by 18.6% relative to the control under drought stress at day 21.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Organ / stage
- leafe1
- Treatment
- B18-0074e1
- Outcome
- leaf photosynthetic rate (Pn)e1
- Direction
- increasede1
- Value
- 18.6%e1
- Qualifier
- with foliar applicatione1
- Comparator
- the controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e1“B18-0074 increased leaf photosynthetic rate (Pn) by 8.8% with soil plus foliar application and 18.6% with foliar application relative to the control under drought stress at day 21”
Claim · model-written summary
B18-0075 applied as soil plus foliar increased photosynthetic rate (Pn) by 16.9% relative to the control under drought stress at day 21.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- B18-0075e2
- Outcome
- Pne2
- Direction
- increasede2
- Value
- 16.9%e2
- Qualifier
- with soil plus foliar applicatione2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e2“B18-0075 increased Pn by 16.9% with soil plus foliar application and 24.6% with foliar application relative to the control under drought stress at day 21”
Claim · model-written summary
B18-0075 applied as foliar increased photosynthetic rate (Pn) by 24.6% relative to the control under drought stress at day 21.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Treatment
- B18-0075e2
- Outcome
- Pne2
- Direction
- increasede2
- Value
- 24.6%e2
- Qualifier
- with foliar applicatione2
- Comparator
- the controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e2“B18-0075 increased Pn by 16.9% with soil plus foliar application and 24.6% with foliar application relative to the control under drought stress at day 21”
Claim · model-written summary
Two Cu-Chl formulation products increased leaf catalase and ascorbate peroxidase activity and glutathione content.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Organ / stage
- leafe3
- Treatment
- two Cu-Chl–containing productse3
- Outcome
- leaf antioxidant enzyme catalase (CAT) and ascorbate peroxidase (APX) activity, as well as glutathione (GSH) contente3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e3“The application of the two Cu-Chl–containing products increased leaf antioxidant enzyme catalase (CAT) and ascorbate peroxidase (APX) activity, as well as glutathione (GSH) content”
Claim · model-written summary
The two Cu-Chl products increased leaf soluble sugars and proline content, indicating improved osmotic adjustment.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Organ / stage
- leafe4
- Treatment
- two productse4
- Outcome
- leaf soluble sugars and proline contente4
- Direction
- increasede4
- Qualifier
- indicating improvement of osmotic adjustmente4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e4“The two products also increased leaf soluble sugars and proline content, indicating improvement of osmotic adjustment”
Claim · model-written summary
B18-0075 applied as soil plus foliar and as foliar increased root biomass.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Organ / stage
- roote5
- Treatment
- B18-0075e5
- Outcome
- root biomasse5
- Direction
- increasede5
- Qualifier
- Soil plus foliar and foliar application onlye5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e5“Soil plus foliar and foliar application only of B18-0075 increased root biomass but did not consistently affect plant shoot growth”
Claim · model-written summary
B18-0075 did not consistently affect plant shoot growth.
- Taxon
- tomato plantsSolanum lycopersicumt0
- Organ / stage
- shoote5
- Treatment
- B18-0075e5
- Outcome
- plant shoot growthe5
- Direction
- did not consistently affecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Tomato Plants”
e5“Soil plus foliar and foliar application only of B18-0075 increased root biomass but did not consistently affect plant shoot growth”
The same questions in other papers
copper atom · physiology: antioxidant enzymes · Solanum lycopersicum (tomato)Results differ
3 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
4 papers more in this group
See all 8 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.