Abstract
Germination and early seedling growth are the most critical periods for plant establishment in saline -alkaline soil, the main factor limiting plant growth and production worldwide. To explore the physiological adaptive mechanisms of the two stages under saline and alkaline conditions, Leymus chinensiswas tested by mixing two neutral salts ( NaCl: Na2SO4) and two alkaline salts ( NaHCO3: Na2CO3). Results showed that reductions of germination and seedling growth were greater under alkaline stress. Nongerminated seeds germinated well after transferring from higher salinity and lower alkalinity to distilled water. The Na + concentration, Na + /K + ratio increased but K + concentration decreased under both stresses, and the changes were greater under alkaline stress. Under saline stress, seedlings mainly accumulated Cl - and soluble sugars to maintain osmotic and ionic balance. But alkaline stress restrained the absorptions of Cl , NO3 – and H2PO4 - , enhanced organic acids, especially malic acid and citric acid to supply the shortage of inorganic anions, and accumulated more soluble sugars to cope with osmotic stress from the high Na + concentration. Thus, our results suggested that the deleterious effects of alkaline stress are more severe than saline stress, high salinities only delay most seeds germination, but high alkalinities cause them lose viability. Accumulating organic acids is the primary different adaptive mechanism to saline and alkaline stresses during early seedling stage of Leymus chinensis. A better understanding of the germination and early seedling processes should facilitate the effective utilization of this species under salt and alkali environments.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 15
Claim · model-written summary
Alkaline stress reduced germination more than saline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- alkaline stresse0
- Outcome
- germinatione0
- Direction
- greatere0
Not reportedComparator
Verbatim
e0“reductions of germination and seedling growth were greater under alkaline stress.”
t0“Leymus chinensis”
Claim · model-written summary
Alkaline stress reduced seedling growth more than saline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- alkaline stresse0
- Outcome
- seedling growthe0
- Direction
- greatere0
Not reportedComparator
Verbatim
e0“reductions of germination and seedling growth were greater under alkaline stress.”
t0“Leymus chinensis”
Claim · model-written summary
Seeds previously under high salinity and low alkalinity germinated after transfer to water.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- germinated welle0
- Qualifier
- higher salinity and lower alkalinitye0
Verbatim
e0“Nongerminated seeds germinated well after transferring from higher salinity and lower alkalinity to distilled water.”
t0“Leymus chinensis”
Claim · model-written summary
Both stresses increased sodium concentration, with greater change under alkaline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- both stressese0
- Outcome
- Na + concentratione0
- Direction
- increasede0
- Qualifier
- greater under alkaline stresse0
Not reportedComparator
Verbatim
e0“The Na + concentration, Na + /K + ratio increased but K + concentration decreased under both stresses, and the changes were greater under alkaline stress.”
t0“Leymus chinensis”
Claim · model-written summary
Both stresses increased the sodium to potassium ratio, with greater change under alkaline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- both stressese0
- Outcome
- Na + /K + ratioe0
- Direction
- increasede0
- Qualifier
- greater under alkaline stresse0
Not reportedComparator
Verbatim
e0“The Na + concentration, Na + /K + ratio increased but K + concentration decreased under both stresses, and the changes were greater under alkaline stress.”
t0“Leymus chinensis”
Claim · model-written summary
Both stresses decreased potassium concentration, with greater change under alkaline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- both stressese0
- Outcome
- K + concentratione0
- Direction
- decreasede0
- Qualifier
- greater under alkaline stresse0
Not reportedComparator
Verbatim
e0“The Na + concentration, Na + /K + ratio increased but K + concentration decreased under both stresses, and the changes were greater under alkaline stress.”
t0“Leymus chinensis”
Claim · model-written summary
Seedlings accumulated chloride under saline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- Cl -e0
- Direction
- accumulatede0
- Qualifier
- Under saline stresse0
Verbatim
e0“Under saline stress, seedlings mainly accumulated Cl - and soluble sugars to maintain osmotic and ionic balance.”
t0“Leymus chinensis”
Claim · model-written summary
Seedlings accumulated soluble sugars under saline stress.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- soluble sugarse0
- Direction
- accumulatede0
- Qualifier
- Under saline stresse0
Verbatim
e0“Under saline stress, seedlings mainly accumulated Cl - and soluble sugars to maintain osmotic and ionic balance.”
t0“Leymus chinensis”
Claim · model-written summary
Alkaline stress restrained chloride uptake.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- alkaline stresse0
- Outcome
- absorptions of Cle0
- Direction
- restrainede0
Not reportedComparator
Verbatim
e0“alkaline stress restrained the absorptions of Cl , NO3 – and H2PO4 - ,”
t0“Leymus chinensis”
Claim · model-written summary
Alkaline stress restrained nitrate uptake.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- alkaline stresse0
- Outcome
- NO3 –e0
- Direction
- restrainede0
Not reportedComparator
Verbatim
e0“alkaline stress restrained the absorptions of Cl , NO3 – and H2PO4 - ,”
t0“Leymus chinensis”
Claim · model-written summary
Alkaline stress restrained phosphate uptake.
- Taxon
- Leymus chinensisLeymus chinensist0
- Treatment
- alkaline stresse0
- Outcome
- H2PO4 -e0
- Direction
- restrainede0
Not reportedComparator
Verbatim
e0“alkaline stress restrained the absorptions of Cl , NO3 – and H2PO4 - ,”
t0“Leymus chinensis”
Claim · model-written summary
Alkaline stress increased malic acid and citric acid accumulation.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- malic acid and citric acide0
- Direction
- enhancede0
Not reportedTreatmentComparator
Verbatim
e0“enhanced organic acids, especially malic acid and citric acid to supply the shortage of inorganic anions,”
t0“Leymus chinensis”
Claim · model-written summary
Alkaline stress caused greater soluble-sugar accumulation.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- soluble sugarse0
- Direction
- moree0
Not reportedTreatmentComparator
Verbatim
e0“accumulated more soluble sugars to cope with osmotic stress from the high Na + concentration.”
t0“Leymus chinensis”
Claim · model-written summary
The authors infer that high salinity mostly delays germination.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- delay most seeds germinatione0
- Qualifier
- high salinitiese0
Verbatim
e0“high salinities only delay most seeds germination,”
t0“Leymus chinensis”
Claim · model-written summary
The authors infer that high alkalinity causes loss of seed viability.
- Taxon
- Leymus chinensisLeymus chinensist0
- Outcome
- lose viabilitye0
- Qualifier
- high alkalinitiese0
Verbatim
e0“high alkalinities cause them lose viability.”
t0“Leymus chinensis”
The same questions in other papers
alkalinity · growth · Leymus chinensisPositive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- negative
- positive
- positive
5 papers more in this group
See all 9 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.