Abstract
Generally, primed seeds produce larger and heavier plants than non-primed seeds. This may be simply due to rapid emergence and extension of leaf growth, or the influence of other physiological processes. The effect of seed pretreatment with salicylic acid (SA) on some physiological and photosynthetic characteristics of the safflower seedlings, cv. Goldasht, was examined under field condition. The treatments were different levels of SA (including zero or hydropriming, 400, 800, 1200, 1600, 2000 and 2400 µM and a treatment of the non-primed seeds as the control). Priming enhanced photosynthesis rate (PN) chlorophyll content index (CCI), relative water content (RWC) and seedling dry weight. Also, primed seeds had higher stomatal conductance (gs) and transpiration rate (E) than the control and the hydroprimed treatments. The lowest intercellular CO2 (Ci) and highest cell membrane stability was obtained in 2400 µM SA. But values of the control treatment were opposite. In addition, highest carboxylation efficiency (CE) and photosynthetic water use efficiency (WUEb) were found in 2000 and 2400 µM of SA. It seems seed priming with SA, increased gs and hence PN by improving RWC status. This was associated with enhanced WUE and CE at higher levels of SA. A positive relationship was found between WUEb and PN, CE and RWC but negative relationship with Ci. It seems that increase in plants dry weight by priming not only was the result of rapid growth rate, but also the enhancement of PN, RWC and chlorophyll content.
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Claims 8
Claim · model-written summary
Priming increased photosynthesis rate, chlorophyll index and relative water content.
- Taxon
- safflower
Carthamus tinctoriuse1 - Material
- Goldashte1
- Treatment
- Priminge0
- Outcome
- photosynthesis rate (PN) chlorophyll content index (CCI), relative water content (RWC)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming enhanced photosynthesis rate (PN) chlorophyll content index (CCI), relative water content (RWC) and seedling dry weight”
e1“safflower seedlings, cv. Goldasht”
Claim · model-written summary
Priming increased seedling dry weight.
- Taxon
- safflowerCarthamus tinctoriuse1
- Treatment
- Priminge0
- Outcome
- seedling dry weighte0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Priming enhanced photosynthesis rate (PN) chlorophyll content index (CCI), relative water content (RWC) and seedling dry weight”
e1“safflower seedlings”
Claim · model-written summary
Primed seeds had higher stomatal conductance and transpiration than control and hydroprimed seeds.
- Taxon
- safflowerCarthamus tinctoriuse1
- Treatment
- primed seedse0
- Outcome
- stomatal conductance (gs) and transpiration rate (E)e0
- Direction
- highere0
- Comparator
- the control and the hydroprimed treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“primed seeds had higher stomatal conductance (gs) and transpiration rate (E) than the control and the hydroprimed treatments”
e1“safflower seedlings”
Claim · model-written summary
The lowest intercellular CO2 occurred at 2400 µM SA.
- Taxon
- safflowerCarthamus tinctoriuse1
- Treatment
- 2400 µM SAe0
- Outcome
- intercellular CO2 (Ci)e0
- Direction
- loweste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest intercellular CO2 (Ci) and highest cell membrane stability was obtained in 2400 µM SA”
e1“safflower seedlings”
Claim · model-written summary
The highest membrane stability occurred at 2400 µM SA.
- Taxon
- safflowerCarthamus tinctoriuse1
- Treatment
- 2400 µM SAe0
- Outcome
- cell membrane stabilitye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest intercellular CO2 (Ci) and highest cell membrane stability was obtained in 2400 µM SA”
e1“safflower seedlings”
Claim · model-written summary
Carboxylation efficiency and photosynthetic water use efficiency peaked at 2000 and 2400 µM SA.
- Taxon
- safflowerCarthamus tinctoriuse1
- Treatment
- 2000 and 2400 µM of SAe0
- Outcome
- carboxylation efficiency (CE) and photosynthetic water use efficiency (WUEb)e0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“highest carboxylation efficiency (CE) and photosynthetic water use efficiency (WUEb) were found in 2000 and 2400 µM of SA”
e1“safflower seedlings”
Claim · model-written summary
Water use efficiency was positively related to photosynthesis rate, carboxylation efficiency and relative water content.
- Taxon
- safflowerCarthamus tinctoriuse1
- Organ / stage
- seedlingse1
- Outcome
- WUEbe0
- Direction
- positivee0
- Qualifier
- PN, CE and RWCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A positive relationship was found between WUEb and PN, CE and RWC”
e1“safflower seedlings”
Claim · model-written summary
Water use efficiency was negatively related to intercellular CO2.
- Taxon
- safflowerCarthamus tinctoriuse2
- Organ / stage
- seedlingse2
- Outcome
- WUEbe1
- Direction
- negativee0
- Qualifier
- Cie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“negative relationship with Ci”
e1“between WUEb and PN, CE and RWC but negative relationship with Ci”
e2“safflower seedlings”
The same questions in other papers
salicylic acid · physiology: photosynthesis · Carthamus tinctorius (safflower)Results agree
1 paper in the same direction as this paper
- positive
salicylic acid · physiology: oxidative · Carthamus tinctorius (safflower)Results agree
2 papers in the same direction as this paper
- positive
- positive
seed treatment · growth · Carthamus tinctorius (safflower)Positive and negative results
19 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
19 papers more in this group
See all 23 papers →seed treatment · physiology: photosynthesis · Carthamus tinctorius (safflower)Results agree
1 paper in the same direction as this paper
- positive
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.