Abstract
Roots of the plants are highly sensitive to interaction with abiotic or biotic components of the soil environment. During current study, 7 days old seedlings of hydroponically grown B. Napus were exposed to different biotic and abiotic stresses including AgNO3, Cinnamic acid, and Pseudomonas syringae under light and dark regimes. Also, the effect of different concentrations of nutrients was analysed by growing the B. Napus seedlings in 1 X, 0.5 X, 0.25 X of Hoagland solution. Data of root exudation of secondary metabolites with to respect to growth rate was noted for each treatment at the end of the week for each abiotic and biotic stress under dark and light at 24, 48 and 72 hours. It was noted that roots of dark grown seedlings exuded remarkably higher quantities of IAA and phenolics as compared to the control. Contrary to this, light exposure reduced the exudation of these secondary metabolites by B. Napus seedlings. Silver nitrate antagonistically affect the seedlings in dark due to the inhibition of the level of IAA, phenolics along with flavonoids and significantly reduced the growth rate. However, under the effect of 200mM cinnamic acid, the growth rate of seedling was improved with the inhibition of secondary metabolites in light condition. Interestingly, exudation of phytoalexins was not influenced conditions of light or dark while silver nitrate reduced its exudation from root in light. In the presence of CA, the light factor became an important modulator of phytoalexins exudation showing contrasting response. As expected, greater availability of nutrients(1 X Hoagland solution) positively influenced the release of secondary metabolites by roots. The effect of 200Mm of AgNO3 and P. syringae was adverse on B. Napus as both inhibited the level of overall exudation of flavonoids and phytoalexins in dark grown seedlings.
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Claims 12
Claim · model-written summary
Dark-grown seedlings exuded higher IAA and phenolics than controls.
Verbatim
e0“roots of dark grown seedlings exuded remarkably higher quantities of IAA and phenolics as compared to the control”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Light exposure reduced seedling exudation of these metabolites.
- Taxon
- B. Napuse0
- Treatment
- light exposuree0
- Outcome
- exudation of these secondary metabolitese0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“light exposure reduced the exudation of these secondary metabolites by B. Napus seedlings”
Claim · model-written summary
Silver nitrate inhibited IAA, phenolics and flavonoids in dark-grown seedlings.
- Taxon
- B. Napuse1
- Treatment
- Silver nitratee0
- Outcome
- level of IAA, phenolics along with flavonoidse0
- Direction
- inhibitione0
Not reportedComparator
Verbatim
e0“Silver nitrate antagonistically affect the seedlings in dark due to the inhibition of the level of IAA, phenolics along with flavonoids”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Silver nitrate significantly reduced growth rate in dark-grown seedlings.
Not reportedComparator
Verbatim
e0“Silver nitrate antagonistically affect the seedlings in dark due to the inhibition of the level of IAA, phenolics along with flavonoids and significantly reduced the growth rate”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Cinnamic acid improved seedling growth rate in light.
Not reportedComparator
Verbatim
e0“under the effect of 200mM cinnamic acid, the growth rate of seedling was improved with the inhibition of secondary metabolites in light condition”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Cinnamic acid inhibited secondary metabolites in light.
Not reportedComparator
Verbatim
e0“under the effect of 200mM cinnamic acid, the growth rate of seedling was improved with the inhibition of secondary metabolites in light condition”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Light versus dark did not influence phytoalexin exudation.
Not reportedComparator
Verbatim
e0“exudation of phytoalexins was not influenced conditions of light or dark”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Silver nitrate reduced root phytoalexin exudation in light.
- Taxon
- B. Napuse2
- Organ / stage
- roote0
- Treatment
- silver nitratee0
- Outcome
- exudation of phytoalexinse1
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“silver nitrate reduced its exudation from root in light”
e1“exudation of phytoalexins”
e2“the B. Napus seedlings in 1 X”
Claim · model-written summary
Light modulated phytoalexin exudation in the presence of CA with contrasting responses.
Not reportedDirection
Verbatim
e0“In the presence of CA, the light factor became an important modulator of phytoalexins exudation showing contrasting response.”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
Greater nutrient availability increased root release of secondary metabolites.
Not reportedComparatorDirection
Verbatim
e0“greater availability of nutrients(1 X Hoagland solution) positively influenced the release of secondary metabolites by roots”
e1“the B. Napus seedlings in 1 X”
Claim · model-written summary
AgNO3 inhibited flavonoid and phytoalexin exudation in dark-grown seedlings.
- Taxon
- B. Napuse0
- Treatment
- 200Mm of AgNO3e0
- Outcome
- overall exudation of flavonoids and phytoalexinse0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“200Mm of AgNO3 and P. syringae was adverse on B. Napus as both inhibited the level of overall exudation of flavonoids and phytoalexins in dark grown seedlings”
Claim · model-written summary
P. syringae inhibited flavonoid and phytoalexin exudation in dark-grown seedlings.
- Taxon
- B. Napuse0
- Treatment
- P. syringaee0
- Interactor
- P. syringae
Pseudomonas syringaee0pathogen - Outcome
- overall exudation of flavonoids and phytoalexinse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“200Mm of AgNO3 and P. syringae was adverse on B. Napus as both inhibited the level of overall exudation of flavonoids and phytoalexins in dark grown seedlings”
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