Abstract
Abstract Identifying environmental factors that improve plant growth and development under nitrogen (N) constraint is essential for sustainable greenhouse production. In the present study, the role of light intensity and N concentrations on the biomass partitioning and physiology of chrysanthemum was investigated. Four light intensities [75, 150, 300, and 600 µmol m −2 s −1 photosynthetic photon flux density (PPFD)] and three N concentrations (5, 10, and 15 mM N L −1 ) were used. Vegetative and generative growth traits were improved by increase in PPFD and N concentration. High N supply reduced stomatal size and g s in plants under lowest PPFD. Under low PPFD, the share of biomass allocated to leaves and stem was higher than that of flower and roots while in plants grown under high PPFD, the share of biomass allocated to flower and root outweighed that of allocated to leaves and stem. As well, positive effects of high PPFD on chlorophyll content, photosynthesis, water use efficiency (WUE), Nitrogen use efficiency (NUE) were observed in N-deficient plants. Furthermore, photosynthetic functionality improved by raise in PPFD. In conclusion, high PPFD reduced the adverse effects of N deficiency by improving photosynthesis and stomatal functionality, NUE, WUE, and directing biomass partitioning toward the floral organs.
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Claims 7
Claim · model-written summary
Increasing PPFD and N concentration improved vegetative and generative growth traits of chrysanthemum.
- Taxon
- chrysanthemum
.jpeg?width=60)
Chrysanthemume0 - Treatment
- increase in PPFD and N concentratione1
- Outcome
- Vegetative and generative growth traitse1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpeg?width=500)
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“Vegetative and generative growth traits were improved by increase in PPFD and N concentration”
Claim · model-written summary
High N supply reduced stomatal size and stomatal conductance (g s) under the lowest PPFD.
- Taxon
- chrysanthemumChrysanthemume0
- Treatment
- High N supplye1
- Outcome
- stomatal size and g se1
- Direction
- reducede1
- Qualifier
- under lowest PPFDe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“High N supply reduced stomatal size and g s in plants under lowest PPFD”
Claim · model-written summary
Under low PPFD, the share of biomass allocated to leaves and stem was higher than that allocated to flower and roots.
- Taxon
- chrysanthemumChrysanthemume0
- Organ / stage
- leaves and steme1
- Treatment
- low PPFDe1
- Outcome
- share of biomass allocated to leaves and steme1
- Direction
- highere1
- Comparator
- flower and rootse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“Under low PPFD, the share of biomass allocated to leaves and stem was higher than that of flower and roots”
Claim · model-written summary
Under high PPFD, the share of biomass allocated to flower and root outweighed that allocated to leaves and stem.
- Taxon
- chrysanthemumChrysanthemume0
- Organ / stage
- flower and roote1
- Treatment
- high PPFDe1
- Outcome
- share of biomass allocated to flower and roote1
- Direction
- outweighede1
- Comparator
- leaves and steme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“in plants grown under high PPFD, the share of biomass allocated to flower and root outweighed that of allocated to leaves and stem”
Claim · model-written summary
High PPFD had positive effects on chlorophyll content and photosynthesis in N-deficient chrysanthemum plants.
- Taxon
- chrysanthemumChrysanthemume0
- Treatment
- high PPFDe1
- Outcome
- chlorophyll content, photosynthesise1
- Direction
- positive effectse1
- Qualifier
- in N-deficient plantse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“As well, positive effects of high PPFD on chlorophyll content, photosynthesis, water use efficiency (WUE), Nitrogen use efficiency (NUE) were observed in N-deficient plants”
Claim · model-written summary
High PPFD had positive effects on water use efficiency and nitrogen use efficiency in N-deficient chrysanthemum plants.
- Taxon
- chrysanthemumChrysanthemume0
- Treatment
- high PPFDe1
- Outcome
- water use efficiency (WUE), Nitrogen use efficiency (NUE)e1
- Direction
- positive effectse1
- Qualifier
- in N-deficient plantse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“As well, positive effects of high PPFD on chlorophyll content, photosynthesis, water use efficiency (WUE), Nitrogen use efficiency (NUE) were observed in N-deficient plants”
Claim · model-written summary
Raising PPFD improved photosynthetic functionality of chrysanthemum.
- Taxon
- chrysanthemumChrysanthemume0
- Treatment
- raise in PPFDe1
- Outcome
- photosynthetic functionalitye1
- Direction
- improvede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“physiology of chrysanthemum was investigated”
e1“Furthermore, photosynthetic functionality improved by raise in PPFD.”
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