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Salinity tolerance in chickpea is associated with the ability to ‘exclude’ Na from leaf mesophyll cells

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Title Salinity tolerance in chickpea is associated with the ability to ‘exclude’ Na from leaf mesophyll cells
 
Creator Kotula, Lukasz
Clode, Peta L.
Jiménez Serna, Juan de la Cruz
Colmer, Timothy D.
 
Subject cicer arietinum
salinity
sodium
chloroplasts
cloroplasto
 
Description Salinity tolerance is associated with Na ‘exclusion’ from, or ‘tissue tolerance’ in, leaves. We investigated whether two contrasting chickpea genotypes, salt-tolerant Genesis836 and salt-sensitive Rupali, differ in leaf tissue tolerance to NaCl. We used X-ray microanalysis to evaluate cellular Na, Cl, and K concentrations in various cell types within leaflets and also in secretory trichomes of the two chickpea genotypes in relation to photosynthesis in control and saline conditions. TEM was used to assess the effects of salinity on the ultrastructure of chloroplasts. Genesis836 maintained net photosynthetic rates (A) for the 21 d of salinity treatment (60 mM NaCl), whereas A in Rupali substantially decreased after 11 d. Leaflet tissue [Na] was low in Genesis836 but had increased markedly in Rupali. In Genesis836, Na was accumulated in epidermal cells but was low in mesophyll cells, whereas in Rupali cellular [Na] was high in both cell types. The excessive accumulation of Na in mesophyll cells of Rupali corresponded to structural damage to the chloroplasts. Maintenance of photosynthesis and thus salinity tolerance in Genesis836 was associated with an ability to ‘exclude’ Na from leaflets and in particular from the photosynthetically active mesophyll cells, and to compartmentalize Na in epidermal cells.
 
Date 2019
2019-11-13T15:35:09Z
2019-11-13T15:35:09Z
 
Type Journal Article
 
Identifier Kotula, Lukasz; Clode, Peta L.; Jimenez, Juan De La Cruz & Colmer, Timothy D. (2019). Salinity tolerance in chickpea is associated with the ability to ‘exclude’ Na from leaf mesophyll cells. Journal of Experimental Botany, 70 (18): 4991-5002
0022-0957
https://hdl.handle.net/10568/105719
https://doi.org/10.1093/jxb/erz241
 
Language en
 
Rights CC-BY-NC-4.0
Open Access
 
Format 70 (18): 4991-5002
 
Publisher Oxford University Press