Abstract
Camellia oleifera Abel. is a unique woody edible oil tree species in China mainly distributed in red soil areas. Nitrogen is one of the important growth-limiting factors for C. oleifera, and the nitrogen form has a vital impact on the growth and development of the plants. Ammonium and nitrate are the two nitrogen forms that are maximally absorbed and utilized by the plants. Here, we used one-year-old seedlings of the main varieties of C. oleifera (‘Xianglin No. 1’, ‘Xianglin No. 27’, and ‘Xianglin No. 210’) to set up six experimental groups treated with different nitrogen forms ([NO3−:NH4+] 0:0, 10:0, 7:3, 5:5, 3:7, and 0:10) and investigated the effects of nitrogen on the vegetative growth and photosynthetic characteristics of the seedlings. This study showed that mixed nitrogen sources could significantly increase the seedling height, ground diameter, biomass accumulation, and photosynthesis efficiency. Transcriptome sequencing analysis led to the identification of 3561 differentially expressed genes in the leaves. Preliminary screening identified several key enzyme genes from nitrogen nutrient metabolic pathways that were differentially expressed among seedlings grown with different nitrogen forms, and their expression pattern changes were further characterized. All the results demonstrate that the same proportion of ammonium nitrate ratio promoted the expression of genes encoding glutamine synthetase and glutamate synthase, thereby improving nitrogen assimilation and utilization efficiency. This study could provide a theoretical basis for scientific and rational fertilization and the improvement of nitrogen utilization efficiency in C. oleifera seedlings.
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Claims 8
Claim · model-written summary
Mixed nitrogen sources significantly increased seedling height in Camellia oleifera seedlings.
- Taxon
- Camellia oleifera
Camellia oleiferat0 - Treatment
- mixed nitrogen sourcese0
- Outcome
- seedling heighte0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mixed nitrogen sources could significantly increase the seedling height, ground diameter, biomass accumulation, and photosynthesis efficiency”
t0“Camellia oleifera”
Claim · model-written summary
Mixed nitrogen sources significantly increased ground diameter in Camellia oleifera seedlings.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- mixed nitrogen sourcese0
- Outcome
- ground diametere0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mixed nitrogen sources could significantly increase the seedling height, ground diameter, biomass accumulation, and photosynthesis efficiency”
t0“Camellia oleifera”
Claim · model-written summary
Mixed nitrogen sources significantly increased biomass accumulation in Camellia oleifera seedlings.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- mixed nitrogen sourcese0
- Outcome
- biomass accumulatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mixed nitrogen sources could significantly increase the seedling height, ground diameter, biomass accumulation, and photosynthesis efficiency”
t0“Camellia oleifera”
Claim · model-written summary
Mixed nitrogen sources significantly increased photosynthesis efficiency in Camellia oleifera seedlings.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- mixed nitrogen sourcese0
- Outcome
- photosynthesis efficiencye0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mixed nitrogen sources could significantly increase the seedling height, ground diameter, biomass accumulation, and photosynthesis efficiency”
t0“Camellia oleifera”
Claim · model-written summary
Transcriptome analysis identified 3561 differentially expressed leaf genes.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Organ / stage
- leavese0
- Outcome
- identification of 3561 differentially expressed genes in the leavese0
- Value
- 3561e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“identification of 3561 differentially expressed genes in the leaves”
t0“Camellia oleifera”
Claim · model-written summary
Nitrogen metabolism enzyme genes were differentially expressed among nitrogen forms.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- different nitrogen formse0
- Outcome
- key enzyme genes from nitrogen nutrient metabolic pathways that were differentially expressed among seedlings grown with different nitrogen formse0
Not reportedSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“key enzyme genes from nitrogen nutrient metabolic pathways that were differentially expressed among seedlings grown with different nitrogen forms”
t0“Camellia oleifera”
Claim · model-written summary
An equal ammonium nitrate ratio promoted glutamine synthetase and glutamate synthase gene expression.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- same proportion of ammonium nitrate ratioe0
- Gene
- glutamine synthetase and glutamate synthasee0
- Outcome
- same proportion of ammonium nitrate ratio promoted the expression of genes encoding glutamine synthetase and glutamate synthasee0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“same proportion of ammonium nitrate ratio promoted the expression of genes encoding glutamine synthetase and glutamate synthase”
t0“Camellia oleifera”
Claim · model-written summary
The equal ammonium nitrate ratio improved nitrogen assimilation and utilization efficiency.
- Taxon
- Camellia oleiferaCamellia oleiferat0
- Treatment
- same proportion of ammonium nitrate ratioe0
- Outcome
- same proportion of ammonium nitrate ratio promoted the expression of genes encoding glutamine synthetase and glutamate synthase, thereby improving nitrogen assimilation and utilization efficiencye0
- Direction
- improvinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“same proportion of ammonium nitrate ratio promoted the expression of genes encoding glutamine synthetase and glutamate synthase, thereby improving nitrogen assimilation and utilization efficiency”
t0“Camellia oleifera”
The same questions in other papers
nitrogen · growth · Camellia oleifera (tea-oil Camellia)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
1 paper more in this group
See all 5 papers →nitrogen · physiology: photosynthesis · Camellia oleifera (tea-oil Camellia)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.