Abstract
Volatile organic compounds (VOCs) emitted by Bacillus species have been reported as growth inducers in Arabidopsis thaliana, but their effects on horticultural species have been scarcely studied.In this study, Lactuca sativa emerges as a model vegetable to evaluate VOCs release by Bacillus sp.BCT9.The results indicated that root length, dry weight, number of lateral root and shoot length increased after VOCs exposition.The initial application of 30 µL of BCT9 in Nutrient Agar (N-A) was the best dose to elicit growth; whereas 60 µL of BCT9 inoculated in Methyl Red & Voges Proskauer Agar (MRVP-A) and Murashige & Skoog Agar (MS-A) had a greater effect.It noteworthy that root development was higher when BCT9 was grown in MRVP-A than in the others culture medium.The identified VOCs released by BCT9 in MRVP-A were 3-hydroxy-2-butanone, 2,3-butanediol, 2-nonanone, 2-undecanone, 2-tridecanone and 2-pentadecanone.Furthermore, the toxicity bioassays indicated that most VOCs did not have high toxic effects and some VOCs stimulated the growth at seed germination stage.In conclusion, this study suggests that VOCs can strongly modulate the L. sativa growth during germination and seedlings stages, so new explorations should be carried out in other vegetables to determine their effects.
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Claims 7
Claim · model-written summary
BCT9 volatile exposure increased root length, dry weight and lateral root number.
- Taxon
- Lactuca sativa
Lactuca sativat0 - Treatment
- VOCs expositione0
- Interactor
- Bacillus sp.BCT9e1symbiont
- Outcome
- root length, dry weight, number of lateral roote0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root length, dry weight, number of lateral root and shoot length increased after VOCs exposition.”
t0“Lactuca sativa”
e1“Bacillus sp.BCT9”
Claim · model-written summary
BCT9 volatile exposure increased shoot length.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- VOCs expositione0
- Interactor
- Bacillus sp.BCT9e1symbiont
- Outcome
- shoot lengthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot length increased after VOCs exposition.”
t0“Lactuca sativa”
e1“Bacillus sp.BCT9”
Claim · model-written summary
A 30 µL BCT9 application in nutrient agar was the best growth dose.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- 30 µL of BCT9 in Nutrient Agar (N-A)e0
- Interactor
- BCT9e0symbiont
- Outcome
- growthe0
- Direction
- beste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The initial application of 30 µL of BCT9 in Nutrient Agar (N-A) was the best dose to elicit growth”
t0“Lactuca sativa”
Claim · model-written summary
A 60 µL BCT9 application in MRVP-A and MS-A had a greater growth effect.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- 60 µL of BCT9e0
- Interactor
- BCT9e0symbiont
- Outcome
- greater effecte0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“60 µL of BCT9 inoculated in Methyl Red & Voges Proskauer Agar (MRVP-A) and Murashige & Skoog Agar (MS-A) had a greater effect”
t0“Lactuca sativa”
Claim · model-written summary
Root development was higher when BCT9 was grown in MRVP-A than other media.
- Taxon
- Lactuca sativaLactuca sativat0
- Treatment
- BCT9 was grown in MRVP-Ae0
- Interactor
- BCT9e0symbiont
- Outcome
- root developmente0
- Direction
- highere0
- Comparator
- the others culture mediume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root development was higher when BCT9 was grown in MRVP-A than in the others culture medium.”
t0“Lactuca sativa”
Claim · model-written summary
Most tested volatiles did not have high toxic effects.
- Taxon
- Lactuca sativaLactuca sativat0
- Outcome
- toxic effectse0
- Direction
- did not have highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most VOCs did not have high toxic effects”
t0“Lactuca sativa”
Claim · model-written summary
Some volatiles stimulated growth at germination.
- Taxon
- Lactuca sativaLactuca sativat0
- Organ / stage
- seed germination stagee0
- Treatment
- VOCse0
- Outcome
- growthe0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some VOCs stimulated the growth at seed germination stage.”
t0“Lactuca sativa”
The same questions in other papers
volatile organic compound · growth · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
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.