Abstract
Understanding the adaptability of Chionanthus retusus Lindl. et Paxt. to extreme water conditions will help in exploring the potential application of this species in barren mountains. Three-year-old Chionanthus retusus seedlings were used in a greenhouse pot experiment that analyzed the effect of different moisture gradients on growth, photosynthetic and fluorescence characteristics, protective enzyme system, osmotic substance regulation and cell membrane damage. The results indicated that C. retusus can effectively grow at a relative soil water content of 44.6% and above and can maintain growth for 20 days under flooded conditions. Under drought stress, net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and intercellular carbon dioxide concentration (Ci) all showed a trend of gradual decrease. The trend of change was similar under waterlogging conditions. The maximal quantum yield of PSII photochemistry (Fv/Fm), actual photochemical efficiency of PSII (ΦPSII), photochemical quenching coefficient (qP), and electron transport rate (ETR) all decreased as drought deepened. Malondialdehyde (MDA) content decreased first and then increased. However, superoxide dismutase (SOD) activity content, peroxidase (POD) activity content, and proline (Pro) activity content showed a trend of increasing and then decreasing. C. retusus had good adaptability in the slight drought treatment group and flooded treatment group but showed intolerance in the high drought group, which could still last for approximately 21 days. C. retusus was found to have a strong adaptability to water stress and can be used as an afforestation tree in barren mountains.
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Claims 12
Claim · model-written summary
C. retusus can effectively grow at a relative soil water content of 44.6% and above.
- Taxon
- C. retusus
Chionanthus retususe0 - Treatment
- relative soil water contente0
- Outcome
- growe0
- Value
- 44.6%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
Claim · model-written summary
C. retusus can maintain growth for 20 days under flooded conditions.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- flooded conditionse1
- Outcome
- maintain growthe1
- Value
- 20 dayse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e1“can maintain growth for 20 days under flooded conditions”
Claim · model-written summary
Under drought stress, net photosynthesis rate, stomatal conductance and transpiration rate showed a gradual decrease.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- drought stresse2
- Outcome
- net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr)e2
- Direction
- gradual decreasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e2“Under drought stress, net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and intercellular carbon dioxide concentration (Ci) all showed a trend of gradual decrease”
Claim · model-written summary
Under drought stress, intercellular carbon dioxide concentration showed a gradual decrease.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- drought stresse2
- Outcome
- intercellular carbon dioxide concentration (Ci)e2
- Direction
- gradual decreasee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e2“Under drought stress, net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and intercellular carbon dioxide concentration (Ci) all showed a trend of gradual decrease”
Claim · model-written summary
The trend of change in photosynthetic traits under waterlogging was similar to that under drought stress.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- waterlogging conditionse3
- Outcome
- trend of changee3
- Direction
- similare3
- Comparator
- drought stresse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e2“Under drought stress, net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and intercellular carbon dioxide concentration (Ci) all showed a trend of gradual decrease”
e3“The trend of change was similar under waterlogging conditions”
Claim · model-written summary
Under drought, maximal quantum yield of PSII, actual photochemical efficiency of PSII and photochemical quenching coefficient decreased.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- droughte4
- Outcome
- maximal quantum yield of PSII photochemistry (Fv/Fm), actual photochemical efficiency of PSII (ΦPSII), photochemical quenching coefficient (qP)e4
- Direction
- decreasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e4“The maximal quantum yield of PSII photochemistry (Fv/Fm), actual photochemical efficiency of PSII (ΦPSII), photochemical quenching coefficient (qP), and electron transport rate (ETR) all decreased as drought deepened”
Claim · model-written summary
Under drought, electron transport rate decreased.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- droughte4
- Outcome
- electron transport rate (ETR)e4
- Direction
- decreasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e4“The maximal quantum yield of PSII photochemistry (Fv/Fm), actual photochemical efficiency of PSII (ΦPSII), photochemical quenching coefficient (qP), and electron transport rate (ETR) all decreased as drought deepened”
Claim · model-written summary
Malondialdehyde content decreased first and then increased under drought.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- droughte4
- Outcome
- Malondialdehyde (MDA) contente5
- Direction
- decreased first and then increasede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e4“as drought deepened”
e5“Malondialdehyde (MDA) content decreased first and then increased”
Claim · model-written summary
Under drought stress, SOD, POD and proline activity content increased and then decreased.
- Taxon
- C. retususChionanthus retususe0
- Treatment
- drought stresse2
- Outcome
- superoxide dismutase (SOD) activity content, peroxidase (POD) activity content, and proline (Pro) activity contente6
- Direction
- increasing and then decreasinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“C. retusus can effectively grow at a relative soil water content of 44.6% and above”
e2“Under drought stress, net photosynthesis rate (Pn), stomatal conductance (Gs), transpiration rate (Tr), and intercellular carbon dioxide concentration (Ci) all showed a trend of gradual decrease”
e6“superoxide dismutase (SOD) activity content, peroxidase (POD) activity content, and proline (Pro) activity content showed a trend of increasing and then decreasing”
Claim · model-written summary
C. retusus showed good adaptability in the slight drought and flooded treatment groups.
- Taxon
- C. retususChionanthus retususe7
- Treatment
- slight drought treatment group and flooded treatment groupe7
- Outcome
- adaptabilitye7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“C. retusus had good adaptability in the slight drought treatment group and flooded treatment group”
Claim · model-written summary
C. retusus showed intolerance in the high drought group, which could last for approximately 21 days.
- Taxon
- C. retususChionanthus retususe7
- Treatment
- high drought groupe1
- Outcome
- intolerancee1
- Value
- approximately 21 dayse1
- Qualifier
- could still laste1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“C. retusus had good adaptability in the slight drought treatment group and flooded treatment group”
e1“showed intolerance in the high drought group, which could still last for approximately 21 days”
Claim · model-written summary
Chionanthus retusus can be used as an afforestation tree in barren mountains.
- Taxon
- Chionanthus retususChionanthus retusust0
- Outcome
- afforestation tree in barren mountainse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Chionanthus retusus”
e1“can be used as an afforestation tree in barren mountains”