Does calcium determine water uptake under saline conditions in pepper plants, or is it water flux which determines calcium uptake?

Cabañero, Francisco J.; Martı́nez, Vicente; Carvajal, Micaela

doi:10.1016/j.plantsci.2003.10.010

Cited by 59 publications

(45 citation statements)

References 36 publications

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“…ABA increased root L p to a greater extent at higher Ca 2+ concentrations. This is consistent with the ameliorating effect of external Ca 2+ on stressinduced reductions in root L o (Cabanero et al, 2004). However, mercuric chloride (1 lM) (an inhibitor of water-channel activity, discussed in the aquaporin section) inhibited the water flow in both the presence and absence of ABA, but from the graphical representation it appears to reduce the flow to a greater extent in the presence of ABA (Quintero et al, 1999).…”

Section: Chemical Signals Associated With Water Stresssupporting

confidence: 75%

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Roles of Aquaporins in Root Responses to Irrigation

et al. 2005

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Due to current environmental issues concerning the use of water for irrigation, the improvement of crop water-use efficiency and a reduction in water consumption has become a priority. New irrigation methods that reduce water use, while still maintaining production have been developed. To optimise these techniques knowledge of above-and below-ground plant physiological responses is necessary. During growth, plant roots are exposed to cycles of wetting and drying in normal rain-fed and irrigation situations. This review concentrates on the below-ground aspects, in particular the water permeability of roots. Significant research has been conducted on the root anatomy and hydraulic conductivity of desert plants subjected to wetting and drying. Major intrinsic proteins (MIPs), most of which show aquaporin (water-channel) activity are likely to be involved in balancing the water relations of the plants during water deficit. However, many MIPs seem to allow permeation of other small neutral solutes and some may allow permeation of ions under certain conditions.

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Section: Chemical Signals Associated With Water Stresssupporting

confidence: 75%

“…The inhibiting effect of salinity on root L o (50-80%) seems to be ameliorated by calcium, since it can determine the restoration of L o (Carvajal et al, 2000), and there is a link between the effect on water flux and calcium uptake (Cabanero et al, 2004).…”

Section: Potential Secondary Impacts Of Irrigationmentioning

confidence: 99%

Roles of Aquaporins in Root Responses to Irrigation

et al. 2005

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“…This beneficial effect of calcium on the development of plants grown under saline conditions has been reported previously (Cramer et al, 1988) and we suggested that the reduction of L0 was related to aquaporins functionality . Therefore, calcium may act by stabilizing the Short-term experiments performed by adding supplemental calcium to the saline growth media only had ameliorative effects under NaCI stress (Azaizeh and Steudle, 1991;Carva~jal et al, 2000;Cabafiero et al, 2004). However, other results indicated that the addition of extra calcium could not completely restore growth after salt stress was already imposed, ah:hough plants maintained normal root growth rates when high calcium concentrations were present in the growth solution before the addition of NaCI (Cramer et al, 1986;Ortiz et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

“…High NaCI concentrations have been shown to induce calcium deficiencies in different plants (Navarro et al, 2000;Kaya et al, 2002). In this way, it is known that external application of calcium can ameliorate the effects of high NaCI on diverse plant species (Cabafiero et al, 2004). An adequate supply of calcium maintains membrane integrity and selectivity (Grattan and Grieve, 1999).…”

mentioning

confidence: 99%

Root Plasma Membrane Lipid Changes in Relation to Water Transport in Pepper: a Response to NaCl and CaCl2 Treatment

et al. 2007

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Seeds of Capsicum annuum were grown hydroponically in a nutrient medium with or without NaCI and with supplemented Ca 2 § Plasma membranes were isolated from roots using a two-phase aqueous polymer technique. The lipid composition (fatty acids, phospholipids and sterols) of the purified plasma membrane was determined. In the presence of NaCI, changes in lipid composition were shown, driving the membrane to a more rigid state. This was accomplished by an increase of (i) the saturation of fatty acids, (ii) the content of stearic acid versus palmitic acid, and (iii) the sterols concentration in the membrane. The changes in the phospholipid composition were also related to NaCI, which reverted when Ca 2 § was also present in the nutrient solution. Furthermore, the alterations of plasma membrane lipid composition under salinity and calcium can be related to water transport properties of the membrane, but other physiological responses have to be taken into account.

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“…Plants exposed to high salinity exhibit membrane destabilization and inhibition of exposed photosynthetic capacity (Munns and Termaat, 1986). Salt-affected pepper shows severe decreases in growth and disturbances in membrane permeability, water channel activity, stomatal conductance, photosynthesis and ion balance (Shannon and Grieve, 1999;Navarro et al, 2003;Cabanero et al, 2004;Aktas et al, 2006). Reduced water uptake is the common response of plants subjected to water and/or salt stress (Munns, 2002).…”

Section: Introductionmentioning

confidence: 99%