Abstract
ABSTRACT- Seed germination and early seedling growth are critical stages for plants establishment and production, particularly under salinity conditions. Exogenous application of silicon (Si) can enhance germination as well as seedling growth. In this experiment, the effect of priming with Si (0, 0.75, 1.5 and 2.25 mM sodium silicate) on seed germination and seedling growth under NaCl (0, 100 and 150 mM) conditions was studied in two wheat cultivars of Kavir (salt tolerant) and Shiraz (salt sensitive). The experiment was designed as a factorial based on completely randomized design with three replications in the laboratoryof college of Agriculture, Shiraz University, in 2012. Results showed that seed priming by Si improved germination percentage, germination rate, vigor index, shoot and root length and seedling dry weight in both stress and non-stress conditions. Moreover, Si increased K+ uptake and K+/Na+ ratio and decreased Na+ content of cultivars with the effect of 2.25 mM being more pronounced. On the contrary, salt stress reduced the above traits andK+ uptake and K+/Na+ ratio and increased mean germination timeand Na+ uptake in both cultivars with the negative effects of 150 mMNaCl being more severe. However, the tolerant cultivar (Kavir) accumulated less Na+ and more K+ and had greater K+/Na+ ratio compared to non-tolerant cultivar (Shiraz). Although the salinity adversely affected seed germination and seedling growth in both cultivars, Kavir (tolerant cultivar) was less affected. It was concluded that priming with Si may promote germination and subsequent seedling growth of wheat cultivars under salinity conditions by reducing Na+ in favor of K+ accumulation.
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Claims 12
Claim · model-written summary
Seed priming with Si improved germination percentage, germination rate and vigor index in both stress and non-stress conditions.
- Taxon
- wheat
Triticum aestivumt0 - Material
- Kavir (salt tolerant) and Shiraz (salt sensitive)e3
- Treatment
- seed priming by Sie1
- Outcome
- germination percentage, germination rate, vigor indexe1
- Direction
- improvede1
- Comparator
- non-stress conditionse1
- Setting
- Shiraz Universitye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“Results showed that seed priming by Si improved germination percentage, germination rate, vigor index, shoot and root length and seedling dry weight in both stress and non-stress conditions”
e2“in the laboratoryof college of Agriculture, Shiraz University, in 2012”
e3“two wheat cultivars of Kavir (salt tolerant) and Shiraz (salt sensitive)”
Claim · model-written summary
Seed priming with Si improved shoot and root length and seedling dry weight in both stress and non-stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Material
- Kavir (salt tolerant) and Shiraz (salt sensitive)e3
- Treatment
- seed priming by Sie1
- Outcome
- shoot and root length and seedling dry weighte1
- Direction
- improvede1
- Comparator
- non-stress conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“Results showed that seed priming by Si improved germination percentage, germination rate, vigor index, shoot and root length and seedling dry weight in both stress and non-stress conditions”
e3“two wheat cultivars of Kavir (salt tolerant) and Shiraz (salt sensitive)”
Claim · model-written summary
Si increased K+ uptake and the K+/Na+ ratio of wheat cultivars, with the 2.25 mM effect more pronounced.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Sie4
- Outcome
- K+ uptake and K+/Na+ ratioe4
- Direction
- increasede4
- Qualifier
- 2.25 mMe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e4“Moreover, Si increased K+ uptake and K+/Na+ ratio and decreased Na+ content of cultivars with the effect of 2.25 mM being more pronounced”
Claim · model-written summary
Si decreased Na+ content of wheat cultivars, with the 2.25 mM effect more pronounced.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Sie4
- Outcome
- Na+ contente4
- Direction
- decreasede4
- Qualifier
- 2.25 mMe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e4“Moreover, Si increased K+ uptake and K+/Na+ ratio and decreased Na+ content of cultivars with the effect of 2.25 mM being more pronounced”
Claim · model-written summary
NaCl stress increased mean germination time compared with non-stress conditions.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- NaCl (0, 100 and 150 mM)e6
- Outcome
- mean germination timee5
- Direction
- increasede5
- Comparator
- non-stress conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“Results showed that seed priming by Si improved germination percentage, germination rate, vigor index, shoot and root length and seedling dry weight in both stress and non-stress conditions”
e5“increased mean germination time”
e6“under NaCl (0, 100 and 150 mM) conditions”
Claim · model-written summary
Salt stress reduced the germination and seedling traits and K+ uptake and K+/Na+ ratio of the wheat cultivars.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- NaCl (0, 100 and 150 mM)e6
- Outcome
- the above traitse7
- Direction
- reducede7
- Comparator
- non-stress conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“Results showed that seed priming by Si improved germination percentage, germination rate, vigor index, shoot and root length and seedling dry weight in both stress and non-stress conditions”
e6“under NaCl (0, 100 and 150 mM) conditions”
e7“On the contrary, salt stress reduced the above traits”
Claim · model-written summary
The negative effects of 150 mM NaCl were more severe than those of lower NaCl levels.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 150 mM NaCle1
- Outcome
- negative effectse1
- Direction
- more severee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“with the negative effects of 150 mMNaCl being more severe”
Claim · model-written summary
The tolerant cultivar Kavir accumulated less Na+ than the non-tolerant cultivar Shiraz.
- Taxon
- wheatTriticum aestivumt0
- Material
- Kavire1
- Outcome
- Na+e1
- Direction
- lesse1
- Comparator
- non-tolerant cultivar (Shiraz)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“the tolerant cultivar (Kavir) accumulated less Na+ and more K+ and had greater K+/Na+ ratio compared to non-tolerant cultivar (Shiraz)”
Claim · model-written summary
The tolerant cultivar Kavir accumulated more K+ than the non-tolerant cultivar Shiraz.
- Taxon
- wheatTriticum aestivumt0
- Material
- Kavire1
- Outcome
- K+e1
- Direction
- moree1
- Comparator
- non-tolerant cultivar (Shiraz)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“the tolerant cultivar (Kavir) accumulated less Na+ and more K+ and had greater K+/Na+ ratio compared to non-tolerant cultivar (Shiraz)”
Claim · model-written summary
The tolerant cultivar Kavir had a greater K+/Na+ ratio than the non-tolerant cultivar Shiraz.
- Taxon
- wheatTriticum aestivumt0
- Material
- Kavire1
- Outcome
- K+/Na+ ratioe1
- Direction
- greatere1
- Comparator
- non-tolerant cultivar (Shiraz)e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“the tolerant cultivar (Kavir) accumulated less Na+ and more K+ and had greater K+/Na+ ratio compared to non-tolerant cultivar (Shiraz)”
Claim · model-written summary
The tolerant cultivar Kavir was less affected by salinity than Shiraz.
- Taxon
- wheatTriticum aestivumt0
- Material
- Kavir (tolerant cultivar)e1
- Outcome
- affectede1
- Direction
- lesse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“Kavir (tolerant cultivar) was less affected”
Claim · model-written summary
Si priming may promote germination and seedling growth under salinity by reducing Na+ in favour of K+ accumulation.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- priming with Sie1
- Outcome
- germination and subsequent seedling growthe1
- Qualifier
- by reducing Na+ in favor of K+ accumulatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“seed germination and seedling growth of wheat cultivars”
e1“priming with Si may promote germination and subsequent seedling growth of wheat cultivars under salinity conditions by reducing Na+ in favor of K+ accumulation”
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