Abstract
Our study examined the relationship between photosynthetic performance and activities of key photosynthetic enzymes to understand the photosynthetic variation and reasons for the variation during dormancy induction under different photoperiods in peach (Prunus persica L. cv. Chunjie). Furthermore, the study explained the changes in the key enzymes from the viewpoint of differential proteomics. The results showed that the leaf net photosynthetic rate (P N) and stomatal conductance tended to decrease, while the intercellular CO2 concentration rose, which indicated that the reduced P N resulted from nonstomatal limitation. During the dormancy induction period, the activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC) declined, which was the main reason for the reduced P N. Two-dimensional electrophoresis maps and differential protein identification demonstrated that the decrease in activity of the photosynthetic enzymes was mainly due to enzymatic degradation. The enzyme degradation by a long-day treatment occurred later and to a lesser degree than that of the short-day treatment. In the long-day treatment, the carboxylation activity of Rubisco was higher than that of the control treatment, and the PEPC activity and the ratio of the PEPC/Rubisco activity were lower than the corresponding activities during the control treatment. These differences under long-day conditions were significant but did not occur in the short-day treatment, suggesting that the C4 pathway might be more active under short-day conditions.
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Claims 9
Claim · model-written summary
Leaf net photosynthetic rate and stomatal conductance decreased during dormancy induction in peach.
- Taxon
- peach
Prunus persicae0 - Material
- Chunjiee0
- Outcome
- leaf net photosynthetic rate (P N) and stomatal conductancee1
- Direction
- decreasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e1“the leaf net photosynthetic rate (P N) and stomatal conductance tended to decrease”
Claim · model-written summary
Intercellular CO2 concentration rose during dormancy induction in peach.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Outcome
- intercellular CO2 concentratione2
- Direction
- rosee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e2“while the intercellular CO2 concentration rose”
Claim · model-written summary
The reduced photosynthetic rate in peach resulted from nonstomatal limitation.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Outcome
- the reduced P Ne3
- Qualifier
- nonstomatal limitatione3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e3“which indicated that the reduced P N resulted from nonstomatal limitation”
Claim · model-written summary
Activities of Rubisco and PEPC declined during the dormancy induction period in peach.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Outcome
- the activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC)e4
- Direction
- declinede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e4“the activities of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and phosphoenolpyruvate carboxylase (PEPC) declined”
Claim · model-written summary
The decline in photosynthetic enzyme activity in peach was mainly due to enzymatic degradation.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Outcome
- the decrease in activity of the photosynthetic enzymese5
- Qualifier
- enzymatic degradatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e5“the decrease in activity of the photosynthetic enzymes was mainly due to enzymatic degradation”
Claim · model-written summary
Enzyme degradation under long-day treatment occurred later and to a lesser degree than under short-day treatment in peach.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Treatment
- long-day treatmente6
- Outcome
- enzyme degradatione6
- Direction
- lesser degreee6
- Qualifier
- occurred latere6
- Comparator
- short-day treatmente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e6“The enzyme degradation by a long-day treatment occurred later and to a lesser degree than that of the short-day treatment”
Claim · model-written summary
Under long-day treatment, Rubisco carboxylation activity was higher than under control treatment in peach.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Treatment
- long-day treatmente7
- Outcome
- carboxylation activity of Rubiscoe7
- Direction
- highere7
- Comparator
- control treatmente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e7“In the long-day treatment, the carboxylation activity of Rubisco was higher than that of the control treatment”
e1“These differences under long-day conditions were significant but did not occur in the short-day treatment”
Claim · model-written summary
Under long-day treatment, PEPC activity and the PEPC/Rubisco activity ratio were lower than under control treatment in peach.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Treatment
- long-day treatmente7
- Outcome
- the PEPC activity and the ratio of the PEPC/Rubisco activitye6
- Direction
- lowere6
- Comparator
- control treatmente6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e6“the PEPC activity and the ratio of the PEPC/Rubisco activity were lower than the corresponding activities during the control treatment”
e1“These differences under long-day conditions were significant but did not occur in the short-day treatment”
e7“In the long-day treatment”
Claim · model-written summary
The C4 pathway might be more active under short-day conditions in peach.
- Taxon
- peachPrunus persicae0
- Material
- Chunjiee0
- Treatment
- short-day conditionse6
- Outcome
- the C4 pathwaye6
- Qualifier
- might be more activee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in peach (Prunus persica L. cv. Chunjie)”
e6“suggesting that the C4 pathway might be more active under short-day conditions”
The same questions in other papers
light · physiology: photosynthesis · Prunus persica (peach)Positive and negative results
4 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
5 papers more in this group
See all 9 papers →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.