Abstract
Sand culture experiment was carried out to study the effect of interaction between N and Zn on active oxygen metabolism and chloroplast ultrastructure of white clover leaves.The main results indicated that the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves significantly decreased and MDA content of leaves remarkably increased with the increase of N rate;N and Zn combined application showed antagonism effect in the condition with deficient Zn,while,in the condition with sufficient Zn,the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves were higher and MDA content of leaves was lower at moderate N rate than those at high and low N rates,suggesting that N and Zn combined application showed synergism effect;at high amount of N supply,the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves significantly decreased and MDA content of leaves remarkably increased compared with those at moderate and low N rate,implying that N and Zn combined application showed antagonism effect.The chloroplast ultrastructure of mesophyll cell of white clover leaves showed that in the condition of Zn deficiency,with the increasing rate of applied N,the inner structure of chloroplast ruined,in which the number of the grana and grana lamellae as well as stroma lamellae decreased and disintegrated,which resulted in the low photosynthesis capacity of chloroplast.In the condition with sufficient supply of Zn,the numbers of the grana,grana lamellae and stroma lamellae as well as the order of the combination of them in chloroplast were the highest at moderate rate of N application,the volume of chloroplast reduced and the system of lamellae swelled and couldn't form grana at high rate of N application.The change of chloroplast ultrastructure was correspondent with that of chlorophyll,SOD and carotinoid content.
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Claims 10
Claim · model-written summary
Increasing nitrogen decreased leaf dry matter, chlorophyll, SOD, and carotinoid.
- Taxon
- white clover
Trifolium repense1 - Treatment
- increase of N ratee0
- Outcome
- dry matter weight,the content of chlorophyll,SOD and carotinoid of leavese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves significantly decreased and MDA content of leaves remarkably increased with the increase of N rate”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
Increasing nitrogen raised leaf MDA content.
- Taxon
- white cloverTrifolium repense1
- Treatment
- increase of N ratee0
- Outcome
- MDA content of leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves significantly decreased and MDA content of leaves remarkably increased with the increase of N rate”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
With sufficient zinc, moderate nitrogen gave higher dry matter, chlorophyll, SOD, and carotinoid than high or low nitrogen.
- Taxon
- white cloverTrifolium repense1
- Treatment
- moderate N ratee0
- Outcome
- dry matter weight,the content of chlorophyll,SOD and carotinoid of leavese0
- Direction
- highere0
- Qualifier
- sufficient Zne0
- Comparator
- high and low N ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the condition with sufficient Zn,the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves were higher and MDA content of leaves was lower at moderate N rate than those at high and low N rates”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
With sufficient zinc, moderate nitrogen gave lower leaf MDA than high or low nitrogen.
- Taxon
- white cloverTrifolium repense1
- Treatment
- moderate N ratee0
- Outcome
- MDA content of leavese0
- Direction
- lowere0
- Qualifier
- sufficient Zne0
- Comparator
- high and low N ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the condition with sufficient Zn,the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves were higher and MDA content of leaves was lower at moderate N rate than those at high and low N rates”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
At high nitrogen supply, dry matter, chlorophyll, SOD, and carotinoid decreased versus moderate and low nitrogen.
- Taxon
- white cloverTrifolium repense1
- Treatment
- high amount of N supplye0
- Outcome
- dry matter weight,the content of chlorophyll,SOD and carotinoid of leavese0
- Direction
- decreasede0
- Comparator
- moderate and low N ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at high amount of N supply,the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves significantly decreased and MDA content of leaves remarkably increased compared with those at moderate and low N rate”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
At high nitrogen supply, leaf MDA increased versus moderate and low nitrogen.
- Taxon
- white cloverTrifolium repense1
- Treatment
- high amount of N supplye0
- Outcome
- MDA content of leavese0
- Direction
- increasede0
- Comparator
- moderate and low N ratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at high amount of N supply,the dry matter weight,the content of chlorophyll,SOD and carotinoid of leaves significantly decreased and MDA content of leaves remarkably increased compared with those at moderate and low N rate”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
Under zinc deficiency, increasing nitrogen disrupted chloroplast inner structure and reduced grana and lamellae.
- Taxon
- white cloverTrifolium repense1
- Treatment
- increasing rate of applied Ne0
- Outcome
- number of the grana and grana lamellae as well as stroma lamellaee0
- Direction
- decreasede0
- Qualifier
- Zn deficiencye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the condition of Zn deficiency,with the increasing rate of applied N,the inner structure of chloroplast ruined,in which the number of the grana and grana lamellae as well as stroma lamellae decreased and disintegrated”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
Under sufficient zinc, moderate nitrogen maximized chloroplast grana and lamella organization.
- Taxon
- white cloverTrifolium repense1
- Treatment
- moderate rate of N applicatione0
- Outcome
- numbers of the grana,grana lamellae and stroma lamellae as well as the order of the combination of them in chloroplaste0
- Direction
- higheste0
- Qualifier
- sufficient supply of Zne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the condition with sufficient supply of Zn,the numbers of the grana,grana lamellae and stroma lamellae as well as the order of the combination of them in chloroplast were the highest at moderate rate of N application”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
At high nitrogen under sufficient zinc, chloroplast volume decreased and lamellae swelled without forming grana.
- Taxon
- white cloverTrifolium repense1
- Treatment
- high rate of N applicatione0
- Outcome
- volume of chloroplaste0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the volume of chloroplast reduced and the system of lamellae swelled and couldn't form grana at high rate of N application”
e1“chloroplast ultrastructure of white clover leaves”
Claim · model-written summary
Chloroplast structural change corresponded with chlorophyll, SOD, and carotinoid content.
- Taxon
- white cloverTrifolium repense1
- Organ / stage
- chloroplaste0
- Outcome
- change of chloroplast ultrastructuree0
- Qualifier
- chlorophyll,SOD and carotinoid contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The change of chloroplast ultrastructure was correspondent with that of chlorophyll,SOD and carotinoid content.”
e1“chloroplast ultrastructure of white clover leaves”
The same questions in other papers
nitrogen · physiology: pigments · Trifolium repens (white clover)Results agree
1 paper in the same direction as this paper
- positive
nitrogen · physiology: oxidative · Trifolium repens (white clover)Results agree
1 paper in the same direction as this paper
- 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.