Abstract
Cadmium (Cd) pollution threatens global food security and many plant growth regulators have been found to improve plant Cd resistance.Jasmonate, a low molecular-weight plant growth regulator, is involved in the processes by which plants respond to Cd stress.However, the underlying mechanisms involved in these processes are unclear.In the present study, we investigated the effects of methyl jasmonate (MeJA, a jasmonate active substance) on maize seedling growth under Cd stress conditions.We found that exogenous MeJA induced the accumulation of polyamines (PAs), especially spermidine (spd), and exogenous MeJA application partially mitigated the Cd-induced inhibition of whole-plant growth.Under Cd stress, the MeJAand spd-treated plant leaves contained less Cd than the leaves of plants not treated with MeJA or spd.With the addition of the spd synthesis inhibitor dicyclohexylamine and MeJA under Cd stress conditions, the leaf Cd concentration was higher than that under the Cd treatment alone, and the JA-induced improvement in maize Cd resistance was eliminated.This suggests that spermidine plays an important role in JA-induced improved Cd resistance in maize seedlings by repressing Cd transport from roots to leaves.
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Claims 6
Claim · model-written summary
Exogenous MeJA induced polyamine accumulation, especially spermidine.
- Treatment
- exogenous MeJAe0
- Outcome
- accumulation of polyamines (PAs), especially spermidine (spd)e0
- Direction
- inducede0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We found that exogenous MeJA induced the accumulation of polyamines (PAs), especially spermidine (spd)”
t0“Maize Seedlings”
Claim · model-written summary
Exogenous MeJA partly mitigated cadmium inhibition of maize growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous MeJA application partially mitigated the Cd-induced inhibition of whole-plant growth”
t0“Maize Seedlings”
Claim · model-written summary
Under Cd stress, MeJA-treated leaves contained less Cd than untreated leaves.
- Treatment
- MeJAe0
- Outcome
- leaves contained less Cde0
- Direction
- lesse0
- Comparator
- plants not treated with MeJA or spde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Cd stress, the MeJAand spd-treated plant leaves contained less Cd than the leaves of plants not treated with MeJA or spd.”
t0“Maize Seedlings”
Claim · model-written summary
Under Cd stress, spermidine-treated leaves contained less Cd than untreated leaves.
- Treatment
- spde0
- Outcome
- leaves contained less Cde0
- Direction
- lesse0
- Comparator
- plants not treated with MeJA or spde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under Cd stress, the MeJAand spd-treated plant leaves contained less Cd than the leaves of plants not treated with MeJA or spd.”
t0“Maize Seedlings”
Claim · model-written summary
Dicyclohexylamine plus MeJA under Cd stress raised leaf Cd concentration above Cd treatment alone.
- Treatment
- spd synthesis inhibitor dicyclohexylamine and MeJAe0
- Outcome
- leaf Cd concentratione0
- Direction
- highere0
- Comparator
- Cd treatment alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the addition of the spd synthesis inhibitor dicyclohexylamine and MeJA under Cd stress conditions, the leaf Cd concentration was higher than that under the Cd treatment alone”
t0“maize”
Claim · model-written summary
The inhibitor eliminated the JA-induced improvement in maize Cd resistance.
- Treatment
- spd synthesis inhibitor dicyclohexylamine and MeJAe1
- Outcome
- maize Cd resistancee0
- Direction
- eliminatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the JA-induced improvement in maize Cd resistance was eliminated”
e1“With the addition of the spd synthesis inhibitor dicyclohexylamine and MeJA under Cd stress conditions”
The same questions in other papers
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(-)-methyl jasmonate · nutrient: content · Zea mays (maize)Results agree
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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.