Abstract
The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination. A unique, germination-related differential response of each maize catalase gene to various doses of SA was observed. During late embryogenesis, total catalase activity in scutella increased dramatically with 1 mM SA treatment. The accumulation of Cat2 transcript and CAT-2 isozyme protein provided the major contribution to the observed increase in total catalase activity. This increase was paralleled by the enhanced growth of germinated embryos at that stage. In a CAT-2 null mutant line, a full compensation of total catalase activity by the CAT-1 isozyme was observed in the presence of SA. This suggests that catalase is important for maintenance of normal cellular processes under stress conditions. SA at 1 mM, which enhances growth of precociously germinated embryos, appeared to inhibit seed germination at 1 day after inhibition. Furthermore, Cat2 transcript accumulation was inhibited at this stage. SA is probably not a direct signal for the induction of the catalase genes. Other signals, possibly germination-related regulator(s), might be responsible for the induction of the catalase genes. The effect of SA on the activity of purified catalase protein was also examined.
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Claims 9
Claim · model-written summary
At late embryogenesis, 1 mM SA treatment increased total catalase activity in scutella.
- Organ / stage
- scutellae1
- Treatment
- 1 mM SA treatmente1
- Outcome
- total catalase activitye1
- Direction
- increasede1
- Qualifier
- late embryogenesise1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e1“During late embryogenesis, total catalase activity in scutella increased dramatically with 1 mM SA treatment”
Claim · model-written summary
Cat2 transcript accumulation and CAT-2 isozyme protein were the major contributors to the increase in total catalase activity.
- Gene
- Cat2e2
- Outcome
- accumulation of Cat2 transcripte2
- Qualifier
- major contribution to the observed increase in total catalase activitye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e2“The accumulation of Cat2 transcript and CAT-2 isozyme protein provided the major contribution to the observed increase in total catalase activity”
Claim · model-written summary
SA at 1 mM enhanced the growth of precociously germinated embryos.
- Organ / stage
- precociously germinated embryose4
- Treatment
- SA at 1 mMe4
- Outcome
- growth of precociously germinated embryose4
- Direction
- enhancese4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e4“SA at 1 mM, which enhances growth of precociously germinated embryos, appeared to inhibit seed germination at 1 day after inhibition”
Claim · model-written summary
SA at 1 mM appeared to inhibit seed germination at 1 day after treatment.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e4“SA at 1 mM, which enhances growth of precociously germinated embryos, appeared to inhibit seed germination at 1 day after inhibition”
Claim · model-written summary
SA at 1 mM inhibited Cat2 transcript accumulation at the same stage.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e4“SA at 1 mM, which enhances growth of precociously germinated embryos, appeared to inhibit seed germination at 1 day after inhibition”
e5“Furthermore, Cat2 transcript accumulation was inhibited at this stage”
Claim · model-written summary
SA is probably not a direct signal for the induction of maize catalase genes.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e6“SA is probably not a direct signal for the induction of the catalase genes”
Claim · model-written summary
Each maize catalase gene showed a unique, germination-related differential response to various doses of SA.
- Treatment
- various doses of SAe7
- Gene
- maize catalase genee7
- Outcome
- differential response of each maize catalase genee7
- Qualifier
- germination-relatede7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e7“A unique, germination-related differential response of each maize catalase gene to various doses of SA was observed”
Claim · model-written summary
In a CAT-2 null mutant line, CAT-1 isozyme fully compensated for total catalase activity in the presence of SA.
- Material
- CAT-2 null mutant linee5
- Treatment
- in the presence of SAe5
- Gene
- CAT-1 isozymee5
- Outcome
- full compensation of total catalase activitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e5“In a CAT-2 null mutant line, a full compensation of total catalase activity by the CAT-1 isozyme was observed in the presence of SA”
Claim · model-written summary
Catalase is important for maintaining normal cellular processes under stress conditions.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The response of the maize catalase genes (Cat1, Cat2, and Cat3) to salicylic acid (SA) was examined at two distinct developmental stages: embryogenesis and germination”
e6“This suggests that catalase is important for maintenance of normal cellular processes under stress conditions”
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See all 11 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.