Abstract
Allelopathic effects of aqueous extract of leaves of Parthenium hysterophorus were studied on seed germination and seedling growth of three cereal crops (Oryza sativa L., Zea mays L. and Triticum aestivum L.), three cultivated crucifers (Raphanus sativus L., Brassica campestris L. and Brassica oleracea L.) and two wild species of family Asteraceae (Artemisia dubia Wall ex. Besser and Ageratina adenophora (Spreng) King and HE Robins). Seed germination of all crucifer species was completely inhibited at >2% leaf extract of Parthenium hysterophorus but in other species, except maize, complete failure of seed germination was recorded only at >6% in Triticum aestivum and Ageratina adenophora; at 10% in Oryza sativa and Artemisia dubia. Seed germination of Zea mays was not completely inhibited but it was low at high concentration of the extract. The extract had strong inhibitory effect to root elongation of seedling in cereals and to shoot elongation in crucifers and wild Asteraceae. Leaves of Parthenium hysterophorus may be a source of natural weedicide against Ageratina adenophora which will help to control invasive plants. Key words: Alien invasive; Asteraceae; Cereal crops; Crucifers; Seedling biomass; Weedicide. DOI: 10.3126/sw.v5i5.2653 Scientific World, Vol. 5, No. 5, July 2007 33-39
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Claims 11
Claim · model-written summary
At >2% extract, crucifer germination was completely inhibited.
- Taxon
- Raphanus sativus L.
Raphanus sativust0 - Treatment
- >2% leaf extract of Parthenium hysterophoruse0
- Interactor
- Parthenium hysterophorus
Parthenium hysterophoruse0weed - Outcome
- Seed germinatione0
- Direction
- completely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed germination of all crucifer species was completely inhibited at >2% leaf extract of Parthenium hysterophorus”
t0“three cultivated crucifers (Raphanus sativus L., Brassica campestris L. and Brassica oleracea L.)”
Claim · model-written summary
At >2% extract, Brassica campestris germination was completely inhibited.
- Taxon
- Brassica campestris L.
.jpg?width=60)
Brassica rapa subsp. oleiferat0 - Treatment
- >2% leaf extract of Parthenium hysterophoruse0
- Interactor
- Parthenium hysterophorusParthenium hysterophoruse0weed
- Outcome
- Seed germinatione0
- Direction
- completely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Seed germination of all crucifer species was completely inhibited at >2% leaf extract of Parthenium hysterophorus”
t0“three cultivated crucifers (Raphanus sativus L., Brassica campestris L. and Brassica oleracea L.)”
Claim · model-written summary
At >2% extract, Brassica oleracea germination was completely inhibited.
- Taxon
- Brassica oleracea L.
Brassica oleraceat0 - Treatment
- >2% leaf extract of Parthenium hysterophoruse0
- Interactor
- Parthenium hysterophorusParthenium hysterophoruse0weed
- Outcome
- Seed germinatione0
- Direction
- completely inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed germination of all crucifer species was completely inhibited at >2% leaf extract of Parthenium hysterophorus”
t0“three cultivated crucifers (Raphanus sativus L., Brassica campestris L. and Brassica oleracea L.)”
Claim · model-written summary
Wheat germination failed completely above 6% extract.
- Taxon
- Triticum aestivum
Triticum aestivume0 - Treatment
- >6%e0
- Interactor
- Parthenium hysterophorusParthenium hysterophorust0weed
- Outcome
- seed germinatione0
- Direction
- complete failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“complete failure of seed germination was recorded only at >6% in Triticum aestivum and Ageratina adenophora”
t0“Parthenium hysterophorus”
Claim · model-written summary
Ageratina germination failed completely above 6% extract.
- Taxon
- Ageratina adenophora
_2.jpg?width=60)
Ageratina adenophorae0 - Treatment
- >6%e0
- Interactor
- Parthenium hysterophorusParthenium hysterophorust0weed
- Outcome
- seed germinatione0
- Direction
- complete failuree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_2.jpg?width=500)
Verbatim
e0“complete failure of seed germination was recorded only at >6% in Triticum aestivum and Ageratina adenophora”
t0“Parthenium hysterophorus”
Claim · model-written summary
Rice germination failed completely at 10% extract.
- Taxon
- Oryza sativa
Oryza sativae0 - Treatment
- 10%e0
- Interactor
- Parthenium hysterophorusParthenium hysterophorust0weed
- Outcome
- germinationt0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 10% in Oryza sativa and Artemisia dubia.”
t0“Parthenium hysterophorus L. on Seed Germination”
Claim · model-written summary
Artemisia germination failed completely at 10% extract.
- Taxon
- Artemisia dubia
Artemisia dubiae0 - Treatment
- 10%e0
- Interactor
- Parthenium hysterophorusParthenium hysterophorust0weed
- Outcome
- germinationt0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 10% in Oryza sativa and Artemisia dubia.”
t0“Parthenium hysterophorus L. on Seed Germination”
Claim · model-written summary
Maize germination remained possible but was low at high extract concentration.
- Treatment
- high concentration of the extracte0
- Interactor
- Parthenium hysterophorusParthenium hysterophorust0weed
- Outcome
- Seed germinatione0
- Direction
- lowe0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed germination of Zea mays was not completely inhibited but it was low at high concentration of the extract.”
t0“Parthenium hysterophorus”
Claim · model-written summary
The extract strongly inhibited cereal seedling root elongation.
- Taxon
- Oryza sativa L.Oryza sativae1
- Treatment
- The extracte0
- Interactor
- Parthenium hysterophorusParthenium hysterophorust0weed
- Outcome
- root elongation of seedlinge0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The extract had strong inhibitory effect to root elongation of seedling in cereals”
t0“Parthenium hysterophorus L. on Seed Germination and Seedling Growth of Some Cultivated and Wild Herbaceous Species”
e1“three cereal crops (Oryza sativa L., Zea mays L. and Triticum aestivum L.)”
Claim · model-written summary
The extract strongly inhibited crucifer and wild Asteraceae seedling shoot elongation.
- Taxon
- Brassica campestris L.Brassica rapa subsp. oleiferat0
- Treatment
- The extracte0
- Interactor
- Parthenium hysterophorusParthenium hysterophoruse1weed
- Outcome
- shoot elongation in crucifers and wild Asteraceaee0
- Direction
- inhibitorye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The extract had strong inhibitory effect to root elongation of seedling in cereals and to shoot elongation in crucifers and wild Asteraceae.”
t0“three cultivated crucifers (Raphanus sativus L., Brassica campestris L. and Brassica oleracea L.)”
e1“Seed germination of all crucifer species was completely inhibited at >2% leaf extract of Parthenium hysterophorus”
Claim · model-written summary
The authors proposed Parthenium leaves as a weedicide against Ageratina.
- Taxon
- Ageratina adenophoraAgeratina adenophorae0
- Interactor
- Parthenium hysterophorusParthenium hysterophoruse0weed
- Outcome
- natural weedicide against Ageratina adenophorae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaves of Parthenium hysterophorus may be a source of natural weedicide against Ageratina adenophora which will help to control invasive plants.”
The same questions in other papers
Parthenium hysterophorus · growth · Brassica rapa (field mustard)Positive and negative results
1 in the opposite direction
- positive
Parthenium hysterophorus · growth · Raphanus sativus (radish)Results agree
1 paper in the same direction as this paper
- negative
botanical · Parthenium hysterophorus · Zea mays (maize)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
1 paper more in this group
See all 5 papers →botanical · Parthenium hysterophorus · Oryza sativa (rice)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
3 papers more in this group
See all 7 papers →botanical · growth · Brassica oleracea (wild cabbage)Positive and negative results
32 papers in the same direction as this paper · 42 in the opposite direction
- positive
- positive
- positive
71 papers more in this group
See all 75 papers →botanical · growth · Brassica rapa (field mustard)Positive and negative results
55 papers in the same direction as this paper · 34 in the opposite direction
- positive
- positive
- positive
86 papers more in this group
See all 90 papers →botanical · growth · Raphanus sativus (radish)Positive and negative results
98 papers in the same direction as this paper · 53 in the opposite direction
- positive
- positive
- positive
148 papers more in this group
See all 152 papers →botanical · Parthenium hysterophorus · Brassica rapa (field mustard)Results agree
1 paper in the same direction as this paper
- negative
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.