Abstract
Plant energy use is fundamental to plant survival and growth. However, we still lack effective means to quantify plant energy use strategies. This study introduced a concept quantifying the light level at which photochemical and non-photochemical energy use in plants are in equilibrium — the photochemical compensation point (PCCP) which can be determined with chlorophyll fluorescence measurements. We used winter wheat as a test case to explore the dynamics of PCCP and its physiological and biochemical regulations. Winter wheat PCCP decreased significantly across growth stages from jointing to grain filling. Long-term nitrogen and phosphate (NP) fertilization significantly increased PCCP, whereas potassium (K) and manure (M) fertilizer supplementation had negligible effects. PCCP exhibited significant positive correlations with leaf thickness, leaf P and sulfur (S), and stomatal conductance ( g s ) across all growth stages. All manure-amended treatments exhibited positive correlations of PCCP with leaf N, P, K and g s , and negative correlations with leaf calcium (Ca). Random forest analysis revealed that g s was the most significant predictor of PCCP variation, followed by leaf P, iWUE , and leaf thickness across all treatments. We suggest that plant energy use strategies are strongly coupled with plant water use strategies and nutrient availability through a complex interplay of effects on physiological and biochemical traits.
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Claims 12
Claim · model-written summary
Winter wheat PCCP decreased significantly across growth stages from jointing to grain filling.
- Taxon
- Winter wheat
Triticum aestivume0 - Organ / stage
- jointing to grain fillinge0
- Outcome
- PCCPe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter wheat PCCP decreased significantly across growth stages from jointing to grain filling”
Claim · model-written summary
Long-term nitrogen and phosphate (NP) fertilization significantly increased wheat PCCP.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Long-term nitrogen and phosphate (NP) fertilizatione0
- Outcome
- PCCPe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Long-term nitrogen and phosphate (NP) fertilization significantly increased PCCP”
t0“wheat”
Claim · model-written summary
Potassium (K) supplementation had negligible effects on wheat PCCP.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- potassium (K)e0
- Outcome
- PCCPe0
- Direction
- negligible effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Long-term nitrogen and phosphate (NP) fertilization significantly increased PCCP, whereas potassium (K) and manure (M) fertilizer supplementation had negligible effects”
t0“wheat”
Claim · model-written summary
Manure (M) fertilizer supplementation had negligible effects on wheat PCCP.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- manure (M) fertilizer supplementatione0
- Outcome
- PCCPe0
- Direction
- negligible effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Long-term nitrogen and phosphate (NP) fertilization significantly increased PCCP, whereas potassium (K) and manure (M) fertilizer supplementation had negligible effects”
t0“wheat”
Claim · model-written summary
PCCP showed significant positive correlations with leaf thickness across all growth stages.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- leaf thicknesse0
- Outcome
- PCCPe0
- Direction
- positive correlationse0
- Setting
- across all growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PCCP exhibited significant positive correlations with leaf thickness, leaf P and sulfur (S), and stomatal conductance ( g s ) across all growth stages”
t0“wheat”
Claim · model-written summary
PCCP showed significant positive correlations with leaf P and sulfur (S) across all growth stages.
- Taxon
- wheatTriticum aestivumt0
- Compound
- leaf P and sulfur (S)e0
- Outcome
- PCCPe0
- Direction
- positive correlationse0
- Setting
- across all growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PCCP exhibited significant positive correlations with leaf thickness, leaf P and sulfur (S), and stomatal conductance ( g s ) across all growth stages”
t0“wheat”
Claim · model-written summary
PCCP showed significant positive correlations with stomatal conductance across all growth stages.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- PCCPe0
- Direction
- positive correlationse0
- Qualifier
- stomatal conductance ( g s )e0
- Setting
- across all growth stagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PCCP exhibited significant positive correlations with leaf thickness, leaf P and sulfur (S), and stomatal conductance ( g s ) across all growth stages”
t0“wheat”
Claim · model-written summary
In all manure-amended treatments PCCP correlated positively with leaf N, P and K.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- manure-amended treatmentse0
- Compound
- leaf N, P, Ke0
- Outcome
- PCCPe0
- Direction
- positive correlationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All manure-amended treatments exhibited positive correlations of PCCP with leaf N, P, K and g s”
t0“wheat”
Claim · model-written summary
In all manure-amended treatments PCCP correlated positively with stomatal conductance (g s).
- Taxon
- wheatTriticum aestivumt0
- Treatment
- manure-amended treatmentse0
- Outcome
- PCCPe0
- Direction
- positive correlationse0
- Qualifier
- g se0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All manure-amended treatments exhibited positive correlations of PCCP with leaf N, P, K and g s”
t0“wheat”
Claim · model-written summary
In all manure-amended treatments PCCP correlated negatively with leaf calcium (Ca).
- Taxon
- wheatTriticum aestivumt0
- Treatment
- All manure-amended treatmentse0
- Compound
- leaf calcium (Ca)e1
- Direction
- negative correlationse1
Not reportedOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All manure-amended treatments”
e1“negative correlations with leaf calcium (Ca)”
t0“wheat”
Claim · model-written summary
Random forest analysis showed stomatal conductance was the most significant predictor of PCCP variation, followed by leaf P, iWUE and leaf thickness across all treatments.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- all treatmentse0
- Outcome
- PCCP variatione0
- Qualifier
- followed by leaf P, iWUE , and leaf thicknesse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Random forest analysis revealed that g s was the most significant predictor of PCCP variation, followed by leaf P, iWUE , and leaf thickness across all treatments”
t0“wheat”
Claim · model-written summary
Plant energy use strategies are suggested to be strongly coupled with plant water use strategies and nutrient availability.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- plant energy use strategiese0
- Qualifier
- strongly coupled with plant water use strategies and nutrient availabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant energy use strategies are strongly coupled with plant water use strategies and nutrient availability”
t0“wheat”
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