Abstract
The developmental response of the Arabidopsis root system to low phosphorus (P) availability involves the reduction in primary root elongation accompanied by the formation of numerous lateral roots. We studied the roles of selected redox metabolites, namely, radical oxygen species (ROS) and ascorbic acid (ASC) in the regulation of root system architecture by different P availability. Rapidly growing roots of plants grown on P-sufficient medium synthesize ROS in root elongation zone and quiescent centre. We have demonstrated that the arrest of root elongation at low P medium coincides with the disappearance of ROS from the elongation zone. P-starvation resulted in a decrease in ascorbic acid level in roots. This correlated with a decrease in cell division activity. On the other hand, feeding P-deficient plants with ASC, stimulated mitotic activity in the primary root meristem and partly reversed the inhibition of root growth imposed by low P conditions. In this paper, we discuss the idea of the involvement of redox agents in the regulation of root system architecture under low P availability.
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Claims 6
Claim · model-written summary
The disappearance of ROS from the elongation zone coincides with arrest of root elongation under low P.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- low P mediume1
- Outcome
- ROS from the elongation zonee1
- Direction
- disappearancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis root system”
e1“We have demonstrated that the arrest of root elongation at low P medium coincides with the disappearance of ROS from the elongation zone”
Claim · model-written summary
P-starvation decreased the ascorbic acid level in roots.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- rootse2
- Treatment
- P-starvatione2
- Outcome
- ascorbic acid levele2
- Direction
- decreasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis root system”
e2“P-starvation resulted in a decrease in ascorbic acid level in roots”
Claim · model-written summary
The decrease in ascorbic acid correlated with a decrease in cell division activity.
- Taxon
- ArabidopsisArabidopsise0
- Compound
- ascorbic acide3
- Outcome
- cell division activitye3
- Direction
- decreasee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis root system”
e3“P-starvation resulted in a decrease in ascorbic acid level in roots. This correlated with a decrease in cell division activity”
Claim · model-written summary
Feeding P-deficient plants with ascorbic acid stimulated mitotic activity in the primary root meristem.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- primary root meristeme4
- Treatment
- feeding P-deficient plants with ASCe4
- Outcome
- mitotic activity in the primary root meristeme4
- Direction
- stimulatede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis root system”
e4“feeding P-deficient plants with ASC, stimulated mitotic activity in the primary root meristem and partly reversed the inhibition of root growth imposed by low P conditions”
Claim · model-written summary
Feeding P-deficient plants with ascorbic acid partly reversed the inhibition of root growth imposed by low P.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- feeding P-deficient plants with ASCe4
- Outcome
- inhibition of root growthe4
- Direction
- partly reversede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis root system”
e4“feeding P-deficient plants with ASC, stimulated mitotic activity in the primary root meristem and partly reversed the inhibition of root growth imposed by low P conditions”
Claim · model-written summary
Rapidly growing roots on P-sufficient medium synthesize ROS in the elongation zone and quiescent centre.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- root elongation zone and quiescent centree5
- Treatment
- P-sufficient mediume5
- Outcome
- synthesize ROSe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Arabidopsis root system”
e5“Rapidly growing roots of plants grown on P-sufficient medium synthesize ROS in root elongation zone and quiescent centre”
The same questions in other papers
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