Abstract
The changes in photosynthetic rate and its mechanism during lucerne(Medicago sativa) regrowth after cutting were investigated in a greenhouse experiment.Photosynthetic rate(Pn),stomatal conductance(gs),contents of malondialchehyche(MDA) and proline,and the activities of superoxidase(SOD),peroxidase(POD) and catalase(CAT) were measured at different soil water availabilities and cutting.Pn and gs increased shortly after cutting.Leaf MDA content decreased 10 h after cutting,while proline content increased.In addition,activity of antioxidases,including SOD,POD and CAT,increased shortly after cutting.The same trend of changes was observed under both water treatments,but significant difference appeared between treatments.It is suggested that cutting stimuli may reduce water stress within the plant body,enhancing osmotic adjustment and clearance of oxygen species,promoting normal functions of plant organs like stomatal movement.Thus,enough CO2 can be supplied and Pn is then maintained and even enhanced.
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Claims 7
Claim · model-written summary
Photosynthetic rate and stomatal conductance increased shortly after cutting.
- Taxon
- lucerne
Medicago sativat0 - Treatment
- cuttinge0
- Outcome
- Pn and gse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn and gs increased shortly after cutting”
t0“lucerne”
Claim · model-written summary
Leaf MDA content fell 10 h after cutting.
- Taxon
- lucerneMedicago sativat0
- Treatment
- cuttinge0
- Outcome
- Leaf MDA contente0
- Direction
- decreasede0
- Qualifier
- 10 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf MDA content decreased 10 h after cutting”
t0“lucerne”
Claim · model-written summary
Proline content increased after cutting.
- Taxon
- lucerneMedicago sativat0
- Treatment
- cuttinge0
- Outcome
- proline contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf MDA content decreased 10 h after cutting,while proline content increased”
t0“lucerne”
Claim · model-written summary
SOD, POD and CAT activity increased shortly after cutting.
- Taxon
- lucerneMedicago sativat0
- Treatment
- cuttinge0
- Outcome
- activity of antioxidases,including SOD,POD and CATe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activity of antioxidases,including SOD,POD and CAT,increased shortly after cutting”
t0“lucerne”
Claim · model-written summary
Both water treatments showed the same response trends but differed significantly.
- Taxon
- lucerneMedicago sativat0
- Outcome
- significant differencee0
- Comparator
- both water treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same trend of changes was observed under both water treatments,but significant difference appeared between treatments”
t0“lucerne”
Claim · model-written summary
Authors suggest cutting reduces plant water stress and improves osmotic adjustment and oxygen species clearance.
- Taxon
- lucerneMedicago sativat0
- Treatment
- cutting stimulie0
- Outcome
- water stress within the plant bodye0
- Direction
- reducee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that cutting stimuli may reduce water stress within the plant body,enhancing osmotic adjustment and clearance of oxygen species”
t0“lucerne”
Claim · model-written summary
Authors suggest stomatal functioning supplies enough CO2, maintaining or enhancing photosynthesis.
- Taxon
- lucerneMedicago sativat0
- Outcome
- Pne0
- Direction
- maintained and even enhancede0
- Qualifier
- stomatal movemente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“promoting normal functions of plant organs like stomatal movement.Thus,enough CO2 can be supplied and Pn is then maintained and even enhanced”
t0“lucerne”
The same questions in other papers
pruning · physiology: photosynthesis · Medicago sativa (alfalfa)Results agree
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- positive
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2 papers more in this group
See all 6 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.