Abstract
In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl. It was found that ultraviolet B (UVB) radiation was able to significantly induce nitric oxide synthase (NOS) activities and speedup the release of apparent nitric oxide (NO) of mesocotyl and that exogenous NO donor's rhizospheric treatments may mimic the responses of the mesocotyl to UVB radiation, such as the inhibition of mesocotyl elongation, the decrease in exo- and endoglucanase activities and the increase in protein content of cell wall of mesocotyl. When the seedlings were treated with N-nitro-L-arginine, an inhibitor of NOS, the mesocotyl elongation was promoted, the exo- and endoglucanase activities were raised and the protein content was reduced. However, under UVB radiation, the effects of exogenous NO on several physiological aspects of mesocotyl were similar to those of exogenous reactive oxygen species (ROS) eliminator, N-acetyl-cysteine. All the physiological changes were associated with either the exogenous NO supply or the activities of NOS in plant. Accordingly, it is assumed that reduction in mesocotyl length caused by UVB radiation was possibly achieved through modification of the chemical properties of the cell wall polysaccharides, which was induced by NO and ROS synergically mediated changes in exo- and endo-beta-D-glucanases activities in cell walls, and NO was one of the main signaling molecule of UVB radiation in inhibiting mesocotyl elongations. So NO might function as both a second messenger and an antioxidant of UVB radiation during developmental growth of the mesocotyl.
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Claims 10
Claim · model-written summary
UVB increased mesocotyl nitric oxide synthase activity.
- Treatment
- ultraviolet B (UVB) radiatione0
- Outcome
- nitric oxide synthase (NOS) activitiese0
- Direction
- inducee0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ultraviolet B (UVB) radiation was able to significantly induce nitric oxide synthase (NOS) activities”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
UVB accelerated nitric oxide release from the mesocotyl.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“speedup the release of apparent nitric oxide (NO) of mesocotyl”
t0“Ultraviolet B”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
Exogenous nitric oxide inhibited mesocotyl elongation.
- Treatment
- exogenous NO donor's rhizospheric treatmentse0
- Outcome
- mesocotyl elongatione0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous NO donor's rhizospheric treatments may mimic the responses of the mesocotyl to UVB radiation, such as the inhibition of mesocotyl elongation”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
Exogenous nitric oxide decreased mesocotyl exo- and endoglucanase activities.
- Treatment
- exogenous NO donor's rhizospheric treatmentse2
- Outcome
- exo- and endoglucanase activitiese0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in exo- and endoglucanase activities”
t0“Nitric Oxide”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
e2“exogenous NO donor's rhizospheric treatments may mimic the responses of the mesocotyl to UVB radiation”
Claim · model-written summary
Exogenous nitric oxide increased mesocotyl cell-wall protein content.
- Treatment
- exogenous NO donor's rhizospheric treatmentse2
- Outcome
- protein content of cell wall of mesocotyle0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in protein content of cell wall of mesocotyl”
t0“Nitric Oxide”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
e2“exogenous NO donor's rhizospheric treatments may mimic the responses of the mesocotyl to UVB radiation”
Claim · model-written summary
N-nitro-L-arginine promoted mesocotyl elongation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the seedlings were treated with N-nitro-L-arginine, an inhibitor of NOS, the mesocotyl elongation was promoted, the exo- and endoglucanase activities were raised and the protein content was reduced”
t0“Ultraviolet B”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
N-nitro-L-arginine raised mesocotyl exo- and endoglucanase activities.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the seedlings were treated with N-nitro-L-arginine, an inhibitor of NOS, the mesocotyl elongation was promoted, the exo- and endoglucanase activities were raised and the protein content was reduced”
t0“Ultraviolet B”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
N-nitro-L-arginine reduced mesocotyl protein content.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When the seedlings were treated with N-nitro-L-arginine, an inhibitor of NOS, the mesocotyl elongation was promoted, the exo- and endoglucanase activities were raised and the protein content was reduced”
t0“Ultraviolet B”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
Under UVB, exogenous NO produced physiological effects similar to N-acetyl-cysteine.
- Treatment
- exogenous NOe0
- Outcome
- effects of exogenous NO on several physiological aspects of mesocotyle0
- Direction
- similare0
- Comparator
- N-acetyl-cysteinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under UVB radiation, the effects of exogenous NO on several physiological aspects of mesocotyl were similar to those of exogenous reactive oxygen species (ROS) eliminator, N-acetyl-cysteine”
t0“Ultraviolet B”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
Claim · model-written summary
The authors proposed that NO and ROS alter cell-wall glucanase activity and polysaccharides to mediate UVB inhibition of mesocotyl elongation.
- Outcome
- reduction in mesocotyl lengthe0
- Qualifier
- modification of the chemical properties of the cell wall polysaccharidese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reduction in mesocotyl length caused by UVB radiation was possibly achieved through modification of the chemical properties of the cell wall polysaccharides, which was induced by NO and ROS synergically mediated changes in exo- and endo-beta-D-glucanases activities in cell walls”
t0“Ultraviolet B”
e1“In this report, a number of physiological aspects was examined during developmental growth of maize seedling's mesocotyl”
The same questions in other papers
nitric oxide · growth · Zea mays (maize)Positive and negative results
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See all 13 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.