Ion flux profiles and plant ion homeostasis control under salt stress

Abstract

The ability of a plant to maintain an ionic homeostasis is crucial in plant salt tolerance. Direct evidence based on data from the non-invasive measurement of ion fluxes would not only offer new insight about the function of the transporter but also provide a whole plant approach for dissecting salt adaptation mechanisms. Here, we review some reports using the ion-selective microelectrodes to characterize the net ion fluxes of tissues or cells.

Cyclin dependent protein kinases and stress responses in plants

“…95,96 In general, high salinity causes ion toxicity, nutritional disorders, water deficit and oxidative stress to plants. 94,97 Additionally, it can adversely affects all aspects of plant development and limits productivity of crop species, disturbing cell cycle progression and differentiation. [98][99][100][101] More specifically, salt stress decreased the transcript levels of CDKA/CDKB and CycA/CycB resulting in transient downregulation of mitotic activity in the shoot and root ©2 0 1 1 L a n d e s B i o s c i e n c e .…”

Physiological analysis and transcriptome comparison of two muskmelon (Cucumis melo L.) cultivars in response to salt stress

“…Whether plants in general can survive under saline conditions depends, to a large extent, on their ability to exclude salt from their shoots, or to tolerate high concentrations of salt in their leaves (tissue tolerance), which involves the ability to maintain ionic homeostasis, particularly of K + , Na + , and Cl - (Sun et al, 2009). Maintaining a high K + /Na + ratio in the cytosol of plant cells has been proven to be a key feature of salt-tolerant plants, and is often suggested as a potential screening tool for plant breeders (Tester and Davenport, 2003).…”

Trends in genetic engineering of plants with (Na+/H+) antiporters for salt stress tolerance

“…[2,4,5] Specifically in the case of salt stress, the important and vital strategy adopted by plants is to orchestrate the movement of Na C and K C across the cellular and vacuolar membranes resulting ionic and osmotic homeostasis. [6,7] Plants are classified as glycophytes and halophytes based on the potential of Na C mitigation strategies coupled with Na C restriction from entry into the cytoplasm and its compartmentalization into the vacuoles.…”

“…[6,7,12] Initially, the SOS1 gene was studied extensively for its role in Na C outward movement and salinity tolerance in Arabidopsis. The plasma membrane Na C /H C antiporter encoded by the SOS1 gene has 12 trans-membrane domains in the N-terminal half and a long hydrophilic C-terminal tail.…”