Response to non-uniform salinity in the root zone of the halophyte Atriplex nummularia: growth, photosynthesis, water relations and tissue ion concentrations

Bazihizina, Nadia; Colmer, Timothy D.; Barrett-Lennard, E.G.

doi:10.1093/aob/mcp151

Cited by 72 publications

(61 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In cotton growing in a split-root experiment, plant biomass was determined by the lowest salinity in the root zone (Dong et al 2010), supporting hypothesis #2. However, growth and photosynthesis of the halophyte Artiplex nummularia was determined by the mean salinity of the root zone (Bazihizina et al 2009), supporting hypothesis #3.…”

Section: Introductionmentioning

confidence: 61%

The response of the mangrove Avicennia marina to heterogeneous salinity measured using a split-root approach

et al. 2015

View full text Add to dashboard Cite

Aims To investigate the physiological processes underlying freshwater utilisation in halophytes under nonuniform salinity conditions in order to determine whether preferential uptake of freshwater occurs and whether transient freshwater availability improves plant water relations and photosynthesis Methods In a split-root experiment, we grew Avicennia marina (Forssk.) Vierh. at uniform salinity conditions (35:35 ppt) and then lowered (35:5 ppt) or increased (35:65 ppt) salinity to one compartment. Using δ 18 Olabelled water we calculated the extent of preferential water uptake of either source. Results When given a 35:5 treatment, A. marina tookup three times more water from the fresher compartment than predicted by a root-weighted-no-salinitypreference model. No difference between compartments was observed in the 35:65 treatment, suggesting that avoidance of the more saline water did not occur. In the 35:5 treatment, stomatal conductance increased within 1.5 h, but photosynthetic rates were not enhanced over the 48-h period of the experiment and rapidly decreased in the 35:65 treatment. Conclusions Avicennia marina responds to transient freshwater patches by increasing water uptake from areas of the root zone where the salinity is better for growth. However, photosynthetic rates respond to the highest salinity in the root zone; thus, reductions in salinity in part of the root zone may enhance water storage in stem tissues but positive effects on photosynthesis may require longer periods.

show abstract

Section: Introductionmentioning

confidence: 61%

The response of the mangrove Avicennia marina to heterogeneous salinity measured using a split-root approach

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Given this progress, the stage is now certainly set to use similar techniques to advance our understanding of responses to salinity and their effects on other processes (Bazihizina et al 2009(Bazihizina et al , 2012.…”

Section: Growth and Developmentmentioning

confidence: 99%

The integration of activity in saline environments: problems and perspectives

Cheeseman

2013

Functional Plant Biol.

View full text Add to dashboard Cite

Abstract. The successful integration of activity in saline environments requires flexibility of responses at all levels, from genes to life cycles. Because plants are complex systems, there is no 'best' or 'optimal' solution and with respect to salt, glycophytes and halophytes are only the ends of a continuum of responses and possibilities. In this review, I briefly examine seven major aspects of plant function and their responses to salinity including transporters, secondary stresses, carbon acquisition and allocation, water and transpiration, growth and development, reproduction, and cytosolic function and 'integrity'. I conclude that new approaches are needed to move towards understanding either organismal integration or 'salt tolerance', especially cessation of protocols dependent on sudden, often lethal, shock treatments and the embracing of systems level resources. Some of the tools needed to understand the integration of activity and even 'salt stress' are already in hand, such as those for whole-transcriptome analysis. Others, ranging from discovery studies of the nature of the cytosol to expanded tool kits for proteomic, metabolomic and epigenomic studies, still need to be further developed. After resurrecting the distinction between applied stress and the resultant strain and noting that with respect to salinity, the strain is manifest in changes at all -omic levels, I conclude that it should be possible to model and quantify stress responses.

show abstract

“…These authors observed that above this concentration level, growth is negatively affected due to disruption of plant metabolism, with a subsequent reduction in growth. Bazihizina et al (2012) evaluated the growth of A. nummularia under 10 mM, 120 mM, 230 mM, 450 mM and 670 mM of NaCl and observed, 21 days later, an increase in growth at the interval of 120-230 mm of NaCl. However, at 450 mM, growth was similar to that of plants exposed to 10 mM of NaCl.…”

Section: Resultsmentioning

confidence: 99%

“…For the levels of 450 mM and 600 mM, this increase was linear (p < 0.01), whereas, for the levels of 150 mM and 300 mM, effects of the time under salt stress imposition were quadratic (p < 0.01). Mean values obtained at 45 days for the (Hassine et al 2008, Bazihizina et al 2009). …”

Section: Resultsmentioning

confidence: 99%

Ecophysiological and biochemical responses of saltbush subjected to salinity

Oliveira

Reis

Fagundes

et al. 2016

Pesqui. Agropecu. Trop.

View full text Add to dashboard Cite

Saltbush, a halophyte species tolerant to salt stress, is an excellent material for the identification of physiological and biochemical mechanisms involved in the resistance to salinity. This study aimed at evaluating the ecophysiological and biochemical responses of saltbush plants at the concentrations of 0 mM, 150 mM, 300 mM, 450 mM and 600 mM of NaCl. Biometry, gas exchange and relative content of chlorophyll and proline in the leaves were measured. Plants presented growth stimulation mainly at the levels of 0 mM, 150 mM and 300 mM of NaCl. Regarding gas exchange, plants showed variation in the photosynthetic rate and stomatal regulation, with a small increase in leaf transpiration. Salinity did not significantly alter the chlorophyll contents, but induced an increase in proline contents in all NaCl levels, demonstrating a growth maintenance capacity and indicating the occurrence of osmotic adjustment.

show abstract

Response to non-uniform salinity in the root zone of the halophyte Atriplex nummularia: growth, photosynthesis, water relations and tissue ion concentrations

Cited by 72 publications

References 31 publications

The response of the mangrove Avicennia marina to heterogeneous salinity measured using a split-root approach

The response of the mangrove Avicennia marina to heterogeneous salinity measured using a split-root approach

The integration of activity in saline environments: problems and perspectives

Ecophysiological and biochemical responses of saltbush subjected to salinity

Contact Info

Product

Resources

About