Salinity Induced Changes in Plant Water Status, Nodule Functioning and Ionic Distribution in Phenotypically Differing Genotypes of Vigna radiata L.

Nandwal, A. S.; Godara, M.; Sheokand, Sunita; Kamboj, Dev Vrat; Kundu, B. S.; Kuhad, M. S.; Kumar, Bhumesh; Sharma, Sita Ram

doi:10.1016/s0176-1617(00)80073-5

Cited by 41 publications

(20 citation statements)

References 20 publications

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“…Upon recovery, a decrease in Na + /K + ratio was noticed but the values were still higher than in control. Cl -content increased significantly (Table 1), as was reported earlier in various crops (Manchanda et al 1991, Sharma 1996, Nandwal et al 2000b, Sairam et al 2002. Upon recovery Cl -content was also decreased.…”

Section: ⎯⎯⎯⎯supporting

confidence: 81%

“…The mechanism by which salinity affects plant metabolism, thereby reducing growth and development are still not completely understood. Osmoprotectants such as proline and total soluble sugars are usually accumulated during exposure to salinity stress and help the plant to overcome stress conditions (Nandwal et al 2000a,b, Sairam et al 2002, Qasim et al 2003. Because of lack of sufficient information on root system as compared to the shoot portion, the present investigations were undertaken with objective to assess the effect of single saline irrigation (Cl -dominated) and subsequent desalinization on ethylene evolution, membrane integrity and antioxidative defense system in chickpea roots along with the changes in plant water status.…”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

“…The reduction in osmotic potential under stress conditions is important for osmotic adjustment and can be a result of solute accumulation, e.g. proline, betaine, total soluble sugars (Nandwal et al 2000a,b, Sairam et al 2002, Kaur et al 2003, Qasim et al 2003, Fernandes et al 2004). …”

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

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Plant water status, H2O2 scavenging enzymes, ethylene evolution and membrane integrity of Cicer arietinum roots as affected by salinity

et al. 2005

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The chickpea genotype, CSG-8962 was raised in screenhouse to study salinity induced changes in ethylene evolution, antioxidative defence system and membrane integrity in relation to changes in plant water and mineral content. At vegetative stage (60 d after sowing), the plants were exposed to single saline irrigation (0, 2.5, 5.0 and 10.0 dS m -1 ). Sampling was done 3 d after saline treatments. The other sets of treated plants were re-irrigated with water and sampled after further 3 d. The Ψ w of leaf and Ψ s of leaf and roots decreased from -0.47 to -0.61 MPa, -0.67 to -1.23 MPa and from -0.57 to -0.95 MPa, respectively, with increasing salinity. Similarly, RWC of leaf and roots reduced from 87.5 to 72.3 % and 96.7 to 84.35 %, respectively. The decline in Ψs of roots was mainly due to accumulation of proline and total soluble sugar. With salinity, increase in ethylene evolution, 1-aminocyclopropane-1-carboxylic acid (ACC) content and ACC oxidase activity was reported. Similarly, marked increase in H 2 O 2 content (20 -182 %) and lipid peroxidation (43 -170 %) was observed. The defense mechanism activated in roots was confirmed by the increased activities of superoxide dismutase (SOD), peroxidase (POX), ascorbate peroxidase (APX), glutathione transferase (GTase), glutathione reductase (GR) and catalase (CAT) but ascorbic acid (AA) content was decreased. About 3-fold increase in Na + /K + ratio and 2.5 fold increase in Cl -content was observed. Upon desalinization, a partial recovery was observed in most of the parameters studied.

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Section: ⎯⎯⎯⎯supporting

confidence: 81%

Section: ⎯⎯⎯⎯mentioning

confidence: 99%

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Plant water status, H2O2 scavenging enzymes, ethylene evolution and membrane integrity of Cicer arietinum roots as affected by salinity

et al. 2005

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“…High EC levels also induces water deficit even in well watered soils by decreasing the osmotic potential of soil solutes, thus making it difficult for roots to extract water from their surrounding media and thus exerts many symptoms similar to those observed under water deficit. Salt damage to plants is produced by a combination of several causes, including mainly osmotic injury and specific ion toxicity (Munns et al 1995;Nandwal et al (2000) that affect a wide variety of physiological and metabolic processes in plants (Silveira et al 2001). In the last few decades an increasing body of evidence has suggested that salt stress is associated with oxidative stress, through altering antioxidant molecule levels and inducing antioxidative enzymes (Gossett et al 1994;Meneguzzo et al 1998Meneguzzo et al , 1999Hernandez et al 2000).…”

Section: Experiments On Solution Ecmentioning

confidence: 99%

Effects of Hydroponic Solution EC, Substrates, PPF and Nutrient Scheduling on Growth and Photosynthetic Competence During Acclimatization of Micropropagated Spathiphyllum plantlets

et al. 2005

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In vitro regenerated shoots of Spathiphyllum from bioreactor were hydroponically cultured for 30 days. The response of plant growth and photosynthesis to different substrates, photosynthetic photon flux (PPF), nutrient scheduling and electrical conductivity (EC) of hydroponic solution were studied. The best plant growth response was observed in perlite based substrates with moderate PFF (70-100lmol m À2 s À1 ). Highest fresh weight, dry weight, shoot length, root length, root number and photosynthetic characteristics (chlorophyll, carotenoids and Fv/Fm) was observed in continuous immersion system. Plant growth responses, photosynthetic rate, stomatal conductance and transpiration rate were also found to be affected by EC levels. The optimum EC of a balanced nutrient solution was recorded as 1.2 dS m À1 . Photosynthetic activity was also characterized in terms of photochemical efficiency using measurements of chlorophyll fluorescence. Fv/Fm (it is a measure of the intrinsic or maximum efficiency of PSII i.e. the quantum efficiency if all PSII centers were open) also decreased significantly in plants grown under higher EC level; a decrease in this parameter indicates down regulation of photosynthesis or photoinhibition. Antioxidant defense enzymes such as catalase (CAT), ascorbate peroxidase (APX), peroxidase (POD), glutathione reductase (GR) and monodehydroascorbate reductase (MDHAR) significantly elevated in the leaves and roots of plantlets at higher EC levels. This increase could reflect a defense response to the cellular damage provoked by higher EC levels in the nutrient solution.

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“…Hence, around 10% of the whole territory area and 20% of the cultivated areas of Tunisia are salinized (Hachicha et al 1994;Debez et al 2006). Salt damage to plants is produced by a combination of several causes, including mainly osmotic injury and specific ion toxicity (Nandwal et al 2000), that affect a wide variety of physiological and metabolic processes in plants (Di Baccio et al 2003). In addition to ionic and osmotic components, salt stress leads to oxidative stress through an increase in reactive oxygen species (ROS), such as superoxide (O 2 Á-), hydrogen peroxide (H 2 O 2 ) and hydroxyl radicals (OHÁ) (De Azevedo Neto et al 2005).…”

Section: Introductionmentioning

confidence: 99%

The effect of calcium on the antioxidant systems in the halophyte Cakile maritima under salt stress

Amor¹,

Megdiche²,

Jiménez

et al. 2009

Acta Physiol Plant

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The purpose of the current investigation was to study the effect of Ca 2? (0, 3.5 and 20 mM concentrations) on the antioxidant systems in the halophyte Cakile maritima under NaCl stress (0, 100, 200 and 400 mM NaCl). Plants treated with both moderate calcium (3.5 mM) and salt levels (100 mM) showed the maximum growth, and the addition of 20 mM calcium to the nutrient media did not significantly reduce the growth under the moderate salt treatment. The absence of calcium associated with high salt concentration induced a strong reduction of biomass production. The tolerance of C. maritima at moderate salinity and calcium was related with the lowest values of the parameters indicative of oxidative stress (malondialdehyde, electrolyte leakage and hydrogen peroxide concentration). This was accompanied with a higher peroxidase, superoxide dismutase, ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase and glutathione reductase activities. In contrast, in the absence of calcium, those enzymes showed the lowest activities under all salt treatments. As a whole, it can be noticed that salt tolerance was improved by moderate calcium concentration; however, the absence of calcium has a drastic effect on C. maritima.

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Salinity Induced Changes in Plant Water Status, Nodule Functioning and Ionic Distribution in Phenotypically Differing Genotypes of Vigna radiata L.

Cited by 41 publications

References 20 publications

Plant water status, H<sub>2</sub>O<sub>2</sub> scavenging enzymes, ethylene evolution and membrane integrity of Cicer arietinum roots as affected by salinity

Plant water status, H<sub>2</sub>O<sub>2</sub> scavenging enzymes, ethylene evolution and membrane integrity of Cicer arietinum roots as affected by salinity

Effects of Hydroponic Solution EC, Substrates, PPF and Nutrient Scheduling on Growth and Photosynthetic Competence During Acclimatization of Micropropagated Spathiphyllum plantlets

The effect of calcium on the antioxidant systems in the halophyte Cakile maritima under salt stress

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