Abstract
The effects of NaCl on the transport rates of cations, NO3-, and reduced N compounds between roots and shoot and on NO3- assimilation rate were examined on plants of two species differing in their sensitivity to salinity, bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala). Biomass production after 20 d in response to 50 and 100 mM NaCl decreased by 48 and 59% in bean, but only 6 and 14% in cotton. The comparison of the flow patterns obtained for control and NaCl-fed plants showed that salinity induced a general decrease in all the fluxes involved in partitioning of N and the various ions. This decrease was markedly higher in bean than in cotton. Within either species, the different flows (uptake, xylem flux, phloem flux) of a given element were affected by NaCl to the same extent with minor exceptions. No specific effect of salinity on any of the components of N partitioning were discerned. The greater sensitivity of nitrate reductase activity to NaCl in bean leaves compared to cotton leaves seems to be due to a decreased compartmentalization of ions rather than to a difference in salt tolerance of the enzyme itself. Overall, our data show that alteration of mineral nutrition is not solely the reflection of a decreased growth rate, but also is a general process that impairs uptake of all the minerals even at mild NaCl salinity.
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Claims 6
Claim · model-written summary
NaCl at 50 and 100 mM decreased bean biomass by 48 and 59% relative to control.
Verbatim
e0“bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala)”
e1“Biomass production after 20 d in response to 50 and 100 mM NaCl decreased by 48 and 59% in bean, but only 6 and 14% in cotton”
e2“The comparison of the flow patterns obtained for control and NaCl-fed plants”
Claim · model-written summary
NaCl at 50 and 100 mM decreased cotton biomass by 6 and 14% relative to control.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- 50 and 100 mM NaCle1
- Outcome
- Biomass productione1
- Direction
- decreasede1
- Value
- 6 and 14%e1
- Comparator
- controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala)”
e1“Biomass production after 20 d in response to 50 and 100 mM NaCl decreased by 48 and 59% in bean, but only 6 and 14% in cotton”
e2“The comparison of the flow patterns obtained for control and NaCl-fed plants”
Claim · model-written summary
Salinity decreased the flows of N and ions, and the decrease was markedly higher in bean than in cotton.
Verbatim
e0“bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala)”
e2“The comparison of the flow patterns obtained for control and NaCl-fed plants”
e3“salinity induced a general decrease in all the fluxes involved in partitioning of N and the various ions”
e4“This decrease was markedly higher in bean than in cotton”
Claim · model-written summary
Salinity had no specific effect on any component of N partitioning in bean and cotton.
Verbatim
e0“bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala)”
e2“The comparison of the flow patterns obtained for control and NaCl-fed plants”
e5“No specific effect of salinity on any of the components of N partitioning were discerned”
Claim · model-written summary
Greater sensitivity of nitrate reductase activity to NaCl in bean leaves than in cotton leaves seems to be due to decreased compartmentalization of ions.
Verbatim
e0“bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala)”
e6“The greater sensitivity of nitrate reductase activity to NaCl in bean leaves compared to cotton leaves seems to be due to a decreased compartmentalization of ions rather than to a difference in salt tolerance of the enzyme itself”
Claim · model-written summary
Alteration of mineral nutrition under NaCl is not solely due to reduced growth, but a general process that impairs uptake of all minerals even at mild salinity.
Verbatim
e0“bean (Phaseolus vulgare L. cv Gabriella) and cotton (Gossypium hirsutum L. cv Akala)”
e7“alteration of mineral nutrition is not solely the reflection of a decreased growth rate, but also is a general process that impairs uptake of all the minerals even at mild NaCl salinity”
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