Abstract
The effect of tea plant Camellia sinensis induced by exogenous methyl jasmonate (MJA) on lipoxygenase (LOX), polyphenol oxidase (PPO) and proteinase inhibitor (PI) activity in the leaves of tea plants, as well as the growth and midgut proteinase activity of the geometrid Ectropis obliqua larvae were studied. MJA significantly induced LOX, PPO and PI activity in leaves of tea plants. When geometrid larvae have fed on leaves of tea plants treated with MJA, the activities of the high alkaline trypsin-like enzyme and chymotrypsin-like enzyme in their midgut were significantly inhibited, but the activities of the low alkaline trypsin-like enzyme in their midgut were unaffected, leading to imbalance between different types of proteinase activity in the midgut of the larvae and in turn, the growth were inhibited. These chains of response may be an important mechanism of the direct resistance induced by MJA-treatment of tea plant on geometrid larvae.
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Claims 5
Claim · model-written summary
Exogenous MJA significantly induced LOX, PPO and PI activity in leaves of tea plants.
- Taxon
- tea plantse0
- Organ / stage
- leavese0
- Treatment
- MJAe0
- Outcome
- LOX, PPO and PI activitye0
- Direction
- inducede0
Not reportedComparator
Verbatim
e0“MJA significantly induced LOX, PPO and PI activity in leaves of tea plants”
Claim · model-written summary
Larvae fed on MJA-treated tea leaves had significantly inhibited midgut high alkaline trypsin-like and chymotrypsin-like enzyme activities.
- Taxon
- tea plantse0
- Treatment
- MJAe0
- Interactor
- geometrid larvaee0pest
- Outcome
- activities of the high alkaline trypsin-like enzyme and chymotrypsin-like enzyme in their midgute0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“When geometrid larvae have fed on leaves of tea plants treated with MJA, the activities of the high alkaline trypsin-like enzyme and chymotrypsin-like enzyme in their midgut were significantly inhibited”
Claim · model-written summary
The low alkaline trypsin-like enzyme activity in the midgut of larvae fed on MJA-treated tea leaves was unaffected.
- Taxon
- tea plantse0
- Treatment
- MJAe0
- Interactor
- geometrid larvaee0pest
- Outcome
- activities of the low alkaline trypsin-like enzyme in their midgute0
- Direction
- unaffectede0
Not reportedComparator
Verbatim
e0“When geometrid larvae have fed on leaves of tea plants treated with MJA, the activities of the high alkaline trypsin-like enzyme and chymotrypsin-like enzyme in their midgut were significantly inhibited, but the activities of the low alkaline trypsin-like enzyme in their midgut were unaffected”
Claim · model-written summary
Larvae fed on MJA-treated tea plants had inhibited growth.
- Taxon
- Tea Plantst0
- Treatment
- MJA Treatmentt0
- Interactor
- Geometrid Larvaet0pest
- Outcome
- growthe0
- Direction
- inhibitede0
Not reportedComparator
Verbatim
e0“in turn, the growth were inhibited”
t0“Effect of Exogenous MJA Treatment of Tea Plants on the Growth of Geometrid Larvae”
Claim · model-written summary
The authors suggest the chain of enzyme responses may be an important mechanism of direct resistance induced by MJA treatment of tea plants against geometrid larvae.
Verbatim
e0“These chains of response may be an important mechanism of the direct resistance induced by MJA-treatment of tea plant on geometrid larvae”
The same questions in other papers
(-)-methyl jasmonate · physiology: antioxidant enzymes · Camellia sinensis (black tea)Results agree
2 papers in the same direction as this paper
- positive
- 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.