Abstract
Pot experiments were conducted in the greenhouse of the Faculty of Agriculture in Shebin El-Kom, Menoufia University, during 2018 and 2019 seasons, to study the cultivation of (sensitive) tomato plants in a loading system with watercress plants (resistant) in a soil contaminated with heavy metals. Three levels of lead were used, which are 0 (control), 1000 and 2000 mg / kg of soil, and three levels of cadmium metal, which are 0 (control), 100 and 300 mg / kg of soil, each alone. Use of growth inducers as nanoparticles silicon and seaweed extract and its affects on tomato or watercress plants under heavy metals stress. The characteristics of vegetative growth and some of the physiological and chemical characteristics such as photosynthetic pigments, water relations, activity of some antioxidant enzymes, Pb and Cd accumulation and some quantitative and qualitative characteristics of the yield were studied. The soil contamination with lead and cadmium minerals at all levels led to a decrease in all studied parameters. There was an increase in the accumulation of lead and cadmium metal within watercress plants by increasing the concentrations of lead and cadmium in the contaminated soil, and there was a decrease of the heavy metals residual in the polluted soil. Spraying with silicon and seaweed extract on tomato plants increased the vegetative growth characteristics, relative water content, plant pigments, yield and its components for tomato plants. While it led to a decrease in the concentration of the enzymatic activity of peroxidase and phenoloxidase. Also, increased the efficiency of watercress plants' accumulation of heavy metals.From the above, it is cleared that the use of hyperaccumulators plants (watercress) to accumulate heavy metals led to a decrease in the residual of the two heavy metals, lead and cadmium, in the contaminated soil, and this led to a better growth conditions for tomato plants grown in the intercropping system with watercress plants in soil contaminated with lead and cadmium.
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 8
Claim · model-written summary
Soil contamination with lead and cadmium decreased all studied parameters in tomato.
- Taxon
- tomato plants
Solanum lycopersicume4 - Treatment
- soil contamination with lead and cadmium mineralse1
- Outcome
- all studied parameterse1
- Direction
- decreasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Spraying with silicon and seaweed extract on tomato plants”
e1“The soil contamination with lead and cadmium minerals at all levels led to a decrease in all studied parameters”
Claim · model-written summary
Increasing lead and cadmium concentrations in contaminated soil increased their accumulation in watercress plants.
- Taxon
- watercress plants
Nasturtium officinalee2 - Treatment
- increasing the concentrations of lead and cadmium in the contaminated soile2
- Outcome
- accumulation of lead and cadmium metale2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“There was an increase in the accumulation of lead and cadmium metal within watercress plants by increasing the concentrations of lead and cadmium in the contaminated soil”
Claim · model-written summary
Watercress decreased the heavy metal residue in the polluted soil.
- Taxon
- watercress plantsNasturtium officinalee6
- Outcome
- heavy metals residual in the polluted soile3
- Direction
- decreasee3
- Setting
- polluted soile3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Also, increased the efficiency of watercress plants' accumulation of heavy metals”
e3“there was a decrease of the heavy metals residual in the polluted soil”
Claim · model-written summary
Spraying silicon and seaweed extract increased vegetative growth characteristics, relative water content and plant pigments in tomato.
- Taxon
- tomato plantsSolanum lycopersicume4
- Treatment
- Spraying with silicon and seaweed extracte4
- Outcome
- vegetative growth characteristics, relative water content, plant pigmentse4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Spraying with silicon and seaweed extract on tomato plants increased the vegetative growth characteristics, relative water content, plant pigments, yield and its components for tomato plants”
Claim · model-written summary
Spraying silicon and seaweed extract increased yield and its components in tomato.
- Taxon
- tomato plantsSolanum lycopersicume4
- Treatment
- Spraying with silicon and seaweed extracte4
- Outcome
- yield and its componentse4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Spraying with silicon and seaweed extract on tomato plants increased the vegetative growth characteristics, relative water content, plant pigments, yield and its components for tomato plants”
Claim · model-written summary
Spraying silicon and seaweed extract decreased peroxidase and phenoloxidase enzymatic activity in tomato.
- Taxon
- tomato plantsSolanum lycopersicume4
- Treatment
- Spraying with silicon and seaweed extracte4
- Outcome
- enzymatic activity of peroxidase and phenoloxidasee5
- Direction
- decreasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Spraying with silicon and seaweed extract on tomato plants increased the vegetative growth characteristics, relative water content, plant pigments, yield and its components for tomato plants”
e5“While it led to a decrease in the concentration of the enzymatic activity of peroxidase and phenoloxidase”
Claim · model-written summary
Growth inducers increased the efficiency of watercress accumulation of heavy metals.
- Taxon
- watercress plantsNasturtium officinalee6
- Treatment
- growth inducers as nanoparticles silicon and seaweed extracte7
- Outcome
- efficiency of watercress plants' accumulation of heavy metalse6
- Direction
- increasede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Also, increased the efficiency of watercress plants' accumulation of heavy metals”
e7“Use of growth inducers as nanoparticles silicon and seaweed extract and its affects on tomato or watercress plants under heavy metals stress”
Claim · model-written summary
Intercropping tomato with watercress led to better growth conditions for tomato in lead- and cadmium-contaminated soil.
- Taxon
- tomato plantsSolanum lycopersicume0
- Treatment
- intercropping system with watercress plantse0
- Outcome
- growth conditionse0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this led to a better growth conditions for tomato plants grown in the intercropping system with watercress plants in soil contaminated with lead and cadmium”
The same questions in other papers
silicon atom · yield · Solanum lycopersicum (tomato)Results differ
34 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
33 papers more in this group
See all 37 papers →silicon atom · physiology: water · Solanum lycopersicum (tomato)Results agree
8 papers in the same direction as this paper
- positive
- positive
- positive
5 papers more in this group
See all 9 papers →application · physiology: water · Solanum lycopersicum (tomato)Positive and negative results
12 papers in the same direction as this paper · 5 in the opposite direction
- negative
- negative
- negative
14 papers more in this group
See all 18 papers →intercropping · growth · Solanum lycopersicum (tomato)Positive and negative results
15 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- negative
16 papers more in this group
See all 20 papers →other · yield · Solanum lycopersicum (tomato)Positive and negative results
116 papers in the same direction as this paper · 13 in the opposite direction
- positive
- no effect
- no effect
126 papers more in this group
See all 130 papers →application · yield · Solanum lycopersicum (tomato)Positive and negative results
260 papers in the same direction as this paper · 33 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- no effect
- no effect
292 papers more in this group
See all 296 papers →other · physiology: water · Solanum lycopersicum (tomato)Results agree
13 papers in the same direction as this paper
- positive
- positive
- positive
10 papers more in this group
See all 14 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.