Abstract
ABSTRACT: Substances produced by plants have huge importance regulating multiple functions as germination, development promoter/enhancer, yield increaser and activator of plant defense system against diseases and pests. Due to diversity, each plant species produces different compounds and in different concentrations. This research evaluated the role of 20 plants extracts obtained from different plant species or plant tissues on seed germination and seedlings establishment of maize and lettuce, in concentration of 5%, 10% or 20%. For this, two experiments were carried out, the first analyzing 20 plant extracts and the effects on germination percentage and root and shoot length based on the germination test for the two species. The second was carried out in a greenhouse, in a completely randomized design with three and ten repetitions for maize and lettuce, respectively, using only the three extracts with the best results from the first experiment. Seedling height and seedling dry matter were evaluated. To germination test most of extracts showed negative or no effects in both species. Only Conyza bonariensis at 5% and Richardia brasiliensis at 5% and 20% had positive effects on early seedling growth, increasing the seedlings length for maize seedlings. To seedlings establishment, Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots. The results demonstrated that these plants extract have potential as growth promoters and can be a good option to a better seedling growth and establishment, collaborating to a more effective agriculture.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc. Read at the source ↗
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Claims 10
Claim · model-written summary
Most extracts had negative or no effect in germination tests of maize and lettuce.
- Taxon
- lettuce and maize
Lactuca sativa
Zea mayst0 - Treatment
- extractse0
- Outcome
- germination teste0
- Direction
- negative or no effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To germination test most of extracts showed negative or no effects in both species.”
t0“lettuce and maize”
Claim · model-written summary
Conyza bonariensis extract at 5% increased early maize seedling length.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only Conyza bonariensis at 5% and Richardia brasiliensis at 5% and 20% had positive effects on early seedling growth, increasing the seedlings length for maize seedlings.”
Claim · model-written summary
Richardia brasiliensis extract at 5% increased early maize seedling length.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only Conyza bonariensis at 5% and Richardia brasiliensis at 5% and 20% had positive effects on early seedling growth, increasing the seedlings length for maize seedlings.”
Claim · model-written summary
Richardia brasiliensis extract at 20% increased early maize seedling length.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only Conyza bonariensis at 5% and Richardia brasiliensis at 5% and 20% had positive effects on early seedling growth, increasing the seedlings length for maize seedlings.”
Claim · model-written summary
Conyza bonariensis extract did not significantly change shoot height during seedling establishment.
- Taxon
- lettuce and maizeLactuca sativaZea mayst0
- Treatment
- Conyza bonariensise0
- Outcome
- shoots heighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots.”
t0“lettuce and maize”
Claim · model-written summary
Leucaena leucocephala extract did not significantly change shoot height during seedling establishment.
- Taxon
- lettuce and maizeLactuca sativaZea mayst0
- Treatment
- Leucaena leucocephalae0
- Outcome
- shoots heighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots.”
t0“lettuce and maize”
Claim · model-written summary
Richardia brasiliensis extract did not significantly change shoot height during seedling establishment.
- Taxon
- lettuce and maizeLactuca sativaZea mayst0
- Treatment
- Richardia brasiliensise0
- Outcome
- shoots heighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots.”
t0“lettuce and maize”
Claim · model-written summary
Conyza bonariensis extract increased shoot and root dry mass.
- Taxon
- lettuce and maizeLactuca sativaZea mayst0
- Treatment
- Conyza bonariensise0
- Outcome
- dry mass of shoots and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots.”
t0“lettuce and maize”
Claim · model-written summary
Leucaena leucocephala extract increased shoot and root dry mass.
- Taxon
- lettuce and maizeLactuca sativaZea mayst0
- Treatment
- Leucaena leucocephalae0
- Outcome
- dry mass of shoots and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots.”
t0“lettuce and maize”
Claim · model-written summary
Richardia brasiliensis extract increased shoot and root dry mass.
- Taxon
- lettuce and maizeLactuca sativaZea mayst0
- Treatment
- Richardia brasiliensise0
- Outcome
- dry mass of shoots and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conyza bonariensis, Leucaena leucocephala and Richardia brasiliensis extracts did not show statistical difference to shoots height but increased the dry mass of shoots and roots.”
t0“lettuce and maize”
The same questions in other papers
Conyza bonariensis · growth · Lactuca sativa (garden lettuce)Positive and negative results
1 in the opposite direction
- negative
Leucaena leucocephala · growth · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- no effect
1 paper more in this group
See all 5 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.