Abstract
Abstract Allelopathy of the eucalypt has been considered as an important mechanism for the biodiversity reduction in the eucalypt plantation. To understand the allelopathic potential of the eucalypt ( Eucalyptus grandis ) roots and rhizosphere soil along a chronosequence (2, 4, 6, 8, 10 years), the germination and growth characteristics of three plant species ( Raphanus sativus , Phaseolus aureus , and Lolium perenne ) growing nearby or beneath the eucalypt plantations were measured. The results showed that aqueous extract of E. grandis root suppressed the germination and early seedling growth of the target plants. The younger E. grandis exhibited a comparatively stronger allelopathic potential. The highest dose root extracts from 4 years old E. grandis showed the strongest inhibitory effects on the germination rates of the target species, the inhibitory rates were about 48, 51.2, and 56.56% for R. sativus , P. aureus , and L. perenne , respectively. However, present biotests of rhizosphere soils from 6, 8, and 10‐year‐old plantations exhibited a remarkable stimulative effect on L. perenne , which indicated that the soil might neutralize or dilute allelopathic agents with the increase of plantation age. In addition, according to GC–MS analysis, more allelopathic potential compounds were found in the rhizosphere soil and roots of younger E. grandis plantation. Moreover, more allelochemicals were obtained from soil than from roots. The allelopathic compounds in roots and rhizosphere soil may play important roles in allelopathy of E. grandis plantation. More attention should be paid to the younger E. grandis plantations for the relative higher allelopathic effects.
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Claims 10
Claim · model-written summary
Eucalyptus root extract suppressed target plant germination.
- Taxon
- Raphanus sativus , Phaseolus aureus , and Lolium perenne
Raphanus sativus.jpg?width=60)
Vigna radiata var. radiata
Lolium perennet0 - Treatment
- aqueous extract of E. grandis roote0
- Interactor
- E. grandis
Eucalyptus grandise0other - Outcome
- germinatione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“aqueous extract of E. grandis root suppressed the germination and early seedling growth of the target plants”
t0“Raphanus sativus , Phaseolus aureus , and Lolium perenne”
Claim · model-written summary
Eucalyptus root extract suppressed target seedling growth.
- Taxon
- Raphanus sativus , Phaseolus aureus , and Lolium perenneRaphanus sativusVigna radiata var. radiataLolium perennet0
- Treatment
- aqueous extract of E. grandis roote0
- Interactor
- E. grandisEucalyptus grandise0other
- Outcome
- early seedling growthe0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aqueous extract of E. grandis root suppressed the germination and early seedling growth of the target plants”
t0“Raphanus sativus , Phaseolus aureus , and Lolium perenne”
Claim · model-written summary
Younger Eucalyptus showed stronger allelopathic potential.
- Taxon
- E. grandisEucalyptus grandise0
- Organ / stage
- youngere0
- Outcome
- allelopathic potentiale0
- Direction
- strongere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The younger E. grandis exhibited a comparatively stronger allelopathic potential”
Claim · model-written summary
Four-year Eucalyptus root extracts inhibited Raphanus germination by about 48%.
- Taxon
- R. sativusRaphanus sativuse0
- Treatment
- highest dose root extracts from 4 years old E. grandise0
- Interactor
- E. grandisEucalyptus grandise0other
- Outcome
- germination ratese0
- Direction
- inhibitorye0
- Value
- 48e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest dose root extracts from 4 years old E. grandis showed the strongest inhibitory effects on the germination rates of the target species, the inhibitory rates were about 48, 51.2, and 56.56% for R. sativus , P. aureus , and L. perenne , respectively”
Claim · model-written summary
Four-year Eucalyptus root extracts inhibited Phaseolus germination by about 51.2%.
- Taxon
- P. aureusVigna radiata var. radiatae0
- Treatment
- highest dose root extracts from 4 years old E. grandise0
- Interactor
- E. grandisEucalyptus grandise0other
- Outcome
- germination ratese0
- Direction
- inhibitorye0
- Value
- 51.2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest dose root extracts from 4 years old E. grandis showed the strongest inhibitory effects on the germination rates of the target species, the inhibitory rates were about 48, 51.2, and 56.56% for R. sativus , P. aureus , and L. perenne , respectively”
Claim · model-written summary
Four-year Eucalyptus root extracts inhibited Lolium germination by about 56.56%.
- Taxon
- L. perenneLolium perennee0
- Treatment
- highest dose root extracts from 4 years old E. grandise0
- Interactor
- E. grandisEucalyptus grandise0other
- Outcome
- germination ratese0
- Direction
- inhibitorye0
- Value
- 56.56%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest dose root extracts from 4 years old E. grandis showed the strongest inhibitory effects on the germination rates of the target species, the inhibitory rates were about 48, 51.2, and 56.56% for R. sativus , P. aureus , and L. perenne , respectively”
Claim · model-written summary
Soils from 6-, 8- and 10-year plantations stimulated Lolium perenne.
- Taxon
- L. perenneLolium perennee0
- Treatment
- rhizosphere soils from 6, 8, and 10‐year‐old plantationse0
- Outcome
- stimulative effecte0
- Direction
- stimulativee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rhizosphere soils from 6, 8, and 10‐year‐old plantations exhibited a remarkable stimulative effect on L. perenne”
Claim · model-written summary
Younger Eucalyptus plantations had more potentially allelopathic compounds in soil and roots.
- Taxon
- E. grandisEucalyptus grandise0
- Organ / stage
- rootse0
- Outcome
- allelopathic potential compoundse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more allelopathic potential compounds were found in the rhizosphere soil and roots of younger E. grandis plantation”
Claim · model-written summary
Soil yielded more allelochemicals than roots.
- Taxon
- Eucalyptus grandisEucalyptus grandist0
- Outcome
- allelochemicalse0
- Direction
- moree0
- Comparator
- rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more allelochemicals were obtained from soil than from roots”
t0“Eucalyptus grandis”
Claim · model-written summary
The authors recommend greater attention to younger Eucalyptus plantations for stronger allelopathic effects.
- Taxon
- E. grandisEucalyptus grandise0
- Outcome
- More attention should be paid to the younger E. grandis plantationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More attention should be paid to the younger E. grandis plantations for the relative higher allelopathic effects”
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See all 152 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.