Abstract
The influences of systemic signal,from mature leaves,on the photosynthetic characteristics of developing leaves in sorghum seedlings under salt stress were carefully investigated.Salt stress significantly decreased water potential,net photosynthetic rate,stomatal conductance and slightly increased extent of photoinhibition both in mature and newly developed leaves.In newly developed leaves,stomatal density of both adaxial and abaxial surfaces increased.Under non-salt stress condition,water potential both in mature and newly developed leaves was hardly affected when mature leaves exposed to weak light.However,carbon assimilation,stomatal conductance,soluble sugar content decreased markedly and the extent of photoinhibition increased largely in mature leaves and newly developed leaves due to the shading of mature leaves.Meanwhile,stomatal density,mesophyll thickness and surface area of bundle sheath decreased in newly developed leaves when light intensity decreased for mature leaves.In salt-stressed group,changes in photosynthetic structure and function had a similar tendency with those in non-salt stress group,but a further decline in photosynthesis was observed.Two-way ANOVA among these four treatments showed that there was a synergistic effect between salt stress and high irradiance which impaired the photosynthetic ability more heavily and enhanced photoinhibition.Accordingly,we concluded that there is a systemic regulation on the photosynthetic structure and performance of newly developed leaves under salt stress.The enhancement of light intensity of mature leaves is very important for the improvement of development,carbon assimilation and the alleviation of photoinhibition in newly developed leaves under salt stress.
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Claims 11
Claim · model-written summary
Salt stress decreased water potential, photosynthesis and stomatal conductance in mature and developing leaves.
- Organ / stage
- mature and newly developed leavese0
- Treatment
- Salt stresse0
- Outcome
- water potential,net photosynthetic rate,stomatal conductancee0
- Direction
- decreasede0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress significantly decreased water potential,net photosynthetic rate,stomatal conductance and slightly increased extent of photoinhibition both in mature and newly developed leaves.”
t0“Sorghum Seedlings”
Claim · model-written summary
Salt stress slightly increased photoinhibition in mature and developing leaves.
- Organ / stage
- mature and newly developed leavese0
- Treatment
- Salt stresse0
- Outcome
- extent of photoinhibitione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress significantly decreased water potential,net photosynthetic rate,stomatal conductance and slightly increased extent of photoinhibition both in mature and newly developed leaves.”
t0“Sorghum Seedlings”
Claim · model-written summary
Salt stress increased stomatal density on both surfaces of developing leaves.
- Treatment
- Salt Stresst0
- Outcome
- stomatal density of both adaxial and abaxial surfacese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In newly developed leaves,stomatal density of both adaxial and abaxial surfaces increased.”
t0“Sorghum Seedlings under Salt Stress”
Claim · model-written summary
Weak light on mature leaves hardly affected water potential in either leaf age under non-salt conditions.
- Treatment
- mature leaves exposed to weak lighte0
- Outcome
- water potential both in mature and newly developed leavese0
- Direction
- hardly affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under non-salt stress condition,water potential both in mature and newly developed leaves was hardly affected when mature leaves exposed to weak light.”
t0“Sorghum Seedlings”
Claim · model-written summary
Shading mature leaves decreased assimilation, conductance and soluble sugar in mature and developing leaves.
- Treatment
- shading of mature leavese0
- Outcome
- carbon assimilation,stomatal conductance,soluble sugar contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“carbon assimilation,stomatal conductance,soluble sugar content decreased markedly and the extent of photoinhibition increased largely in mature leaves and newly developed leaves due to the shading of mature leaves.”
t0“Sorghum Seedlings”
Claim · model-written summary
Shading mature leaves increased photoinhibition in both leaf ages.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the extent of photoinhibition increased largely in mature leaves and newly developed leaves due to the shading of mature leaves.”
t0“Sorghum Seedlings”
Claim · model-written summary
Lower light on mature leaves decreased stomatal density, mesophyll thickness and bundle sheath surface area in developing leaves.
- Treatment
- light intensity decreased for mature leavese0
- Outcome
- stomatal density,mesophyll thickness and surface area of bundle sheathe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stomatal density,mesophyll thickness and surface area of bundle sheath decreased in newly developed leaves when light intensity decreased for mature leaves.”
t0“Sorghum Seedlings”
Claim · model-written summary
Salt-stressed plants showed a further decline in photosynthesis under light changes.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In salt-stressed group,changes in photosynthetic structure and function had a similar tendency with those in non-salt stress group,but a further decline in photosynthesis was observed.”
t0“Sorghum Seedlings”
Claim · model-written summary
Salt stress and high irradiance synergistically impaired photosynthesis and increased photoinhibition.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a synergistic effect between salt stress and high irradiance which impaired the photosynthetic ability more heavily and enhanced photoinhibition.”
t0“Sorghum Seedlings”
Claim · model-written summary
The authors inferred systemic regulation of developing leaf photosynthetic structure and performance.
- Outcome
- photosynthetic structure and performance of newly developed leavese0
- Qualifier
- systemic regulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there is a systemic regulation on the photosynthetic structure and performance of newly developed leaves under salt stress.”
t0“Sorghum Seedlings”
Claim · model-written summary
The authors recommend more light for mature leaves to improve developing-leaf development and assimilation and alleviate photoinhibition.
- Outcome
- enhancement of light intensity of mature leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The enhancement of light intensity of mature leaves is very important for the improvement of development,carbon assimilation and the alleviation of photoinhibition in newly developed leaves under salt stress.”
t0“Sorghum Seedlings”
The same questions in other papers
salinity · physiology: photosynthesis · SorghumPositive and negative results
23 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
21 papers more in this group
See all 25 papers →light · physiology: gas exchange · SorghumResults agree
1 paper in the same direction as this paper
- negative
shade · physiology: photosynthesis · SorghumResults agree
3 papers in the same direction as this paper
- no effect
- negative
- negative
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.