Abstract
The purpose of the current investigation was to evaluate the influence of antimycin A (AA) as an activator of the alternative respiratory pathway (AP) on photosynthetic pigment composition and functional activity of the photosynthetic apparatus of wheat seedlings (Triticum aestivum L.) under exposure to high temperature as well as their acclimation. Our results indicated that a significant decrease (44-74%) of photosynthetic pigment contents was caused by a long-term exposure to high temperature (42°C), while the short-term exposure resulted in 20-46% decline. However, a combined effect of AA and long-term high temperature reduced the total pigment contents by 28-41%. Our results demonstrated that the reduction of the chlorophyll a/b ratio was less significant under the combined effect of AA and high temperature than that under the stressful condition without AA. We observed that short-term and long-term high temperature modified PSII functionality of the first leaves in wheat seedlings, which was manifested by the low maximal quantum yield of PSII photochemistry, maximum fluorescence yield in the dark-adapted state, and by high minimum fluorescence yield in the dark-adapted state. The quantum yield of PSII photochemistry decreased rapidly by 16-24% under the combination of AA and high temperature. Overall, these results suggest that the activation of the alternative pathway, induced by AA, contributed to the stabilization of the photosynthetic apparatus in wheat seedlings under high temperature.
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Claims 7
Claim · model-written summary
Long-term exposure to 42°C decreased photosynthetic pigment contents by 44-74%.
- Taxon
- Triticum aestivum
Triticum aestivumt0 - Treatment
- long-term exposure to high temperaturee1
- Outcome
- photosynthetic pigment contentse1
- Direction
- decreasee1
- Value
- 44-74%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum L.”
e1“a significant decrease (44-74%) of photosynthetic pigment contents was caused by a long-term exposure to high temperature (42°C)”
Claim · model-written summary
Short-term exposure to high temperature decreased pigment contents by 20-46%.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- short-term exposuree2
- Outcome
- photosynthetic pigment contentse1
- Direction
- declinee2
- Value
- 20-46%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum L.”
e1“a significant decrease (44-74%) of photosynthetic pigment contents was caused by a long-term exposure to high temperature (42°C)”
e2“while the short-term exposure resulted in 20-46% decline”
Claim · model-written summary
The combined effect of AA and long-term high temperature reduced total pigment contents by 28-41%.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- combined effect of AA and long-term high temperaturee3
- Outcome
- total pigment contentse3
- Direction
- reducede3
- Value
- 28-41%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum L.”
e3“However, a combined effect of AA and long-term high temperature reduced the total pigment contents by 28-41%”
Claim · model-written summary
The reduction of the chlorophyll a/b ratio was less significant under AA plus high temperature than under high temperature without AA.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- combined effect of AA and high temperaturee4
- Outcome
- reduction of the chlorophyll a/b ratioe4
- Direction
- less significante4
- Comparator
- stressful condition without AAe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum L.”
e4“Our results demonstrated that the reduction of the chlorophyll a/b ratio was less significant under the combined effect of AA and high temperature than that under the stressful condition without AA”
Claim · model-written summary
Short-term and long-term high temperature modified PSII functionality, with low maximal quantum yield of PSII photochemistry.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- short-term and long-term high temperaturee5
- Outcome
- PSII functionalitye5
- Direction
- modifiede5
- Qualifier
- low maximal quantum yield of PSII photochemistrye5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum L.”
e5“short-term and long-term high temperature modified PSII functionality of the first leaves in wheat seedlings, which was manifested by the low maximal quantum yield of PSII photochemistry, maximum fluorescence yield in the dark-adapted state, and by high minimum fluorescence yield in the dark-adapted state”
Claim · model-written summary
Under AA plus high temperature, the quantum yield of PSII photochemistry decreased rapidly by 16-24%.
- Taxon
- Triticum aestivumTriticum aestivumt0
- Treatment
- combination of AA and high temperaturee6
- Outcome
- quantum yield of PSII photochemistrye6
- Direction
- decreasede6
- Value
- 16-24%e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Triticum aestivum L.”
e6“The quantum yield of PSII photochemistry decreased rapidly by 16-24% under the combination of AA and high temperature”
Claim · model-written summary
Activation of the alternative pathway induced by AA contributed to stabilizing the photosynthetic apparatus of wheat under high temperature.
- Taxon
- wheat seedlingsTriticum aestivume7
- Treatment
- activation of the alternative pathway, induced by AAe7
- Outcome
- stabilization of the photosynthetic apparatuse7
- Qualifier
- under high temperaturee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“the activation of the alternative pathway, induced by AA, contributed to the stabilization of the photosynthetic apparatus in wheat seedlings under high temperature”
The same questions in other papers
heat · physiology: pigments · Triticum aestivum (wheat)Results differ
7 papers in the same direction as this paper · 37 in the opposite direction
- negative
- negative
- negative
41 papers more in this group
See all 45 papers →heat · physiology: photosynthesis · Triticum aestivum (wheat)Positive and negative results
72 papers in the same direction as this paper · 17 in the opposite direction
- no effect
- positive
- positive
86 papers more in this group
See all 90 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.