Abstract
This experiment was done to evaluate the effect of two planting dates and salicylic acid (SA) on wheat photosynthesis. Wheat seeds, cv. Alvand, primed with SA (0, 400, 800, 1200, 1600, 2000 and 2400 M) at two planting dates (recommended planting date, 23 October, and late planting date, 22 November). Gas exchange parameters were measured in three growth stages (tillering, heading and grain filling). The highest and lowest rate of photosynthesis (P N ), stomatal conductance (g s ) and transpiration rate (E) of plants were observed in heading and grain filling stages, respectively. Seed pretreatment with SA enhanced photosynthetic parameters and carboxylation efficiency (CE), but, intercellular CO 2 concentration and water use efficiency (WUE) reduced by application of SA. It seems that application of SA had more effects on g s and E than P N . Among growth stages, the highest value of WUE was found in tillering and lowest in heading stage. Priming with SA compensated late sowing effects on plants P N . Chlorophyll content, chlorophyll a/b ratio and CCI values significantly increased in SA treated plants. Results show that priming with SA may reduce ameliorative effects of late sowing on wheat plant biomass production. Among SA concentrations, 1200 M had highest value in both planting dates.
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Claims 9
Claim · model-written summary
Photosynthesis, stomatal conductance and transpiration were highest at heading and lowest at grain filling.
- Taxon
- WHEAT
Triticum aestivumt0 - Organ / stage
- heading and grain filling stagese0
- Outcome
- rate of photosynthesis (P N ), stomatal conductance (g s ) and transpiration rate (E)e0
- Direction
- highest and loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest and lowest rate of photosynthesis (P N ), stomatal conductance (g s ) and transpiration rate (E) of plants were observed in heading and grain filling stages, respectively.”
t0“WHEAT”
Claim · model-written summary
SA pretreatment enhanced photosynthetic parameters and carboxylation efficiency.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- Seed pretreatment with SAe0
- Outcome
- photosynthetic parameters and carboxylation efficiency (CE)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed pretreatment with SA enhanced photosynthetic parameters and carboxylation efficiency (CE)”
t0“WHEAT”
Claim · model-written summary
SA reduced intercellular CO 2 concentration and water use efficiency.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- application of SAe0
- Outcome
- intercellular CO 2 concentration and water use efficiency (WUE)e0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intercellular CO 2 concentration and water use efficiency (WUE) reduced by application of SA”
t0“WHEAT”
Claim · model-written summary
SA affected stomatal conductance and transpiration more than photosynthesis.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- application of SAe0
- Outcome
- more effects on g s and E than P Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of SA had more effects on g s and E than P N”
t0“WHEAT”
Claim · model-written summary
Water use efficiency was highest at tillering and lowest at heading.
- Taxon
- WHEATTriticum aestivumt0
- Organ / stage
- tillering and lowest in heading stagee0
- Outcome
- WUEe0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest value of WUE was found in tillering and lowest in heading stage”
t0“WHEAT”
Claim · model-written summary
SA priming compensated late sowing effects on photosynthesis.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- Priming with SAe0
- Outcome
- plants P Ne0
- Direction
- compensatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming with SA compensated late sowing effects on plants P N”
t0“WHEAT”
Claim · model-written summary
SA treatment significantly increased chlorophyll content, chlorophyll a/b ratio and CCI.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- SA treatede0
- Outcome
- Chlorophyll content, chlorophyll a/b ratio and CCI valuese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll content, chlorophyll a/b ratio and CCI values significantly increased in SA treated plants.”
t0“WHEAT”
Claim · model-written summary
The authors suggest SA priming may reduce the ameliorative effect of late sowing on biomass.
- Taxon
- wheatTriticum aestivume0
- Treatment
- priming with SAe0
- Outcome
- wheat plant biomass productione0
- Direction
- reducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“priming with SA may reduce ameliorative effects of late sowing on wheat plant biomass production”
Claim · model-written summary
The 1200 M SA concentration had the highest value at both planting dates.
- Taxon
- WHEATTriticum aestivumt0
- Treatment
- 1200 Me0
- Outcome
- highest valuee0
- Direction
- higheste0
- Qualifier
- both planting datese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among SA concentrations, 1200 M had highest value in both planting dates.”
t0“WHEAT”
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