Drought Stress Response on Some Key Enzymes of Cowpea (Vigna unguiculata L. Walp.) Nodule Metabolism

Figueiredo, M. V. B.; Burity, Hélio Almeida; Martínez, Cosme Rafael; Chanway, C. P.

doi:10.1007/s11274-006-9208-3

Cited by 20 publications

(17 citation statements)

References 23 publications

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“…The influence of drought on cowpea N fixation activity has been reported at the enzyme level (Figueiredo et al, 1999(Figueiredo et al, , 2007, but these results were not related to wholenodule N fixation activity. Three studies have reported decreases in plant N fixation activity with soil drying as compared with leaf capacity for CO 2 assimilation (Pararajasingham and Knievel, 1990;Sinclair and Serraj, 1995;Silveira et al, 2003).…”

Section: Variation Among Cowpea Genotypes In Sensitivity Of Transpiramentioning

confidence: 87%

Variation among Cowpea Genotypes in Sensitivity of Transpiration Rate and Symbiotic Nitrogen Fixation to Soil Drying

et al. 2015

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Cowpea (Vigna unguiculata L. Walp.) is often considered a crop species appropriate for drier environments. However, little or no information exists on two key physiological traits for drought conditions: early decrease in transpiration rate in the soil drying cycle and sustained N fixation activity under low soil‐water conditions. In this study, the responses of these two traits to soil drying were compared among 10 genotypes. The fraction of transpirable soil water at which transpiration rate began to decline varied from 0.59 to 0.24. The genotypes with the higher thresholds for the transpiration decrease offer a conservative water use strategy during soil drying and, hence, may be especially appropriate for very dry areas. The fraction of transpirable soil water at which N fixation rate began to decline ranged from 0.33 in one line to another line in which there was no decline in N fixation rate. Five lines had especially low thresholds for the decline in N fixation rate, which would be highly desirable in arid areas. In fact, N fixation tolerance to drought in these five lines is superior to any responses observed in other grain legumes. There was no correlation between the thresholds for decline in transpiration and N fixation.

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Section: Variation Among Cowpea Genotypes In Sensitivity Of Transpiramentioning

confidence: 87%

Variation among Cowpea Genotypes in Sensitivity of Transpiration Rate and Symbiotic Nitrogen Fixation to Soil Drying

et al. 2015

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“…The possibility of selecting rhizobial strains of cowpea according to their capacity of recovery from different kinds of stresses has been investigated (Serraj et al 2001;Figueiredo et al 2007). However, the non-specificity of the introduced strains and the occurrence of ineffective indigenous strains in soils limit the introductions of selected strains, thus limiting the potential contribution of N 2 fixation as reported to cowpea by Figueiredo et al (1999) and Santos et al (2005) in peanut.…”

Section: Discussionmentioning

confidence: 99%

Effect of rhizobia and rock biofertilizers with Acidithiobacillus on cowpea nodulation and nutrients uptake in a tableland soil

Stamford

Santos

Silva

et al. 2008

World J Microbiol Biotechnol

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Chemical fertilizers have been used in the cultivation of plants due to their high solubility and effect on crops yield. Biofertilizers with phosphate rock (PR) and potash rock (KR) plus sulfur inoculated with Acidithiobacillus may improve plant growth and contribute to addition of available P and K in soil. The effectiveness of biofertilizers from phosphate and potash rocks mixed with sulfur and Acidithiobacillus was studied in a Typic Fragiuldult soil of the Brazilian Northeast Tableland. Cowpea (cv. ''IPA 206'') was grown with and without rhizobia inoculation. Treatments were: (a) phosphate rock (1000 kg ha -1 ); (b) Biofertilizers-B P (250 and 500 kg ha -1 ); (c) triple superphosphate-TSP (250 kg ha -1 ); (d) potash rock (1000 kg ha -1 ); (e) biofertilizer-B K (250; 500 and 750 kg ha -1 ); (f) potassium chloride-KCl (250 kg K 2 0 ha -1 ); (g) control without P or K fertilization (P 0 K 0 ). The soil was maintained under water submersion covered with black plastic (solarization process) for a period of 30 days. Biofertilizers (B p and B K ) and soluble fertilizers increased plant growth and NPK uptake. Biofertilizers reduced soil pH, especially when applied in highest rates. Biofertilizers and TSP+KCl showed the best values of available P and K in soil. Rhizobial inoculation was effective on cowpea, but no nodules were formed by bacteria native from the soil, probably due to the effect of the solarization process. From obtained PK biofertilizers could be used as alternative for cowpea fertilization in Tableland soils.

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“…Furio, Syngenta Seeds) were surface sterilised in 80% (v/v) ethanol for 30 s and then in 5% (w/v) sodium hypochlorite for 2 min before washing several times in sterilised distilled water (Figueiredo et al 2007). Seeds were then germinated in individual sterile pots (1 seed/pot) containing Hoagland nutritive solution, with or without CBs treatments [MCB (120, 80, 40, 12 and 0.8 mg l -1 ), DCB (80-water limit solubility, 40, 8, 0.8 and 0.08 mg l -1 ) and TCB (40-water limit solubility, 30, 20, 10 and 1 mg l -1 )].…”

Section: Plant Material Growth Conditions and Treatmentsmentioning

confidence: 99%

Biological responses of maize (Zea mays) plants exposed to chlorobenzenes. Case study of monochloro-, 1,4-dichloro- and 1,2,4-trichloro-benzenes

et al. 2011

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A 7-day-exposure time experiment was designed to investigate the phytotoxicity of chlorobenzenes (CBs) on Zea mays seedlings, focusing on the growth and generation of oxidative stress. Significant growth inhibition (based on biomass gain) was observed for exposure to monochlorobenzene (MCB), dichlorobenzene (DCB) and trichlorobenzene (TCB) concentrations higher than 10 mg l(-1). It would seem that CBs inhibit cell division, since the mitotic index decreased for roots exposed to DCB at 80 mg l(-1) dose (8%) and to all the TCB concentrations tested (20% inhibition). CBs exposure resulting in an increase in the oxidative stress response in maize seedlings [reactive oxygen species like H(2)O(2), antioxidant enzymes (POD, GR), lipid peroxidation] correlated to the compound's degree of chlorination, where damage increasing with the number of chlorine atoms (MCB < DCB < TCB). This biological response was also dependent on the dose-exposure. Z. mays exposed to CBs at concentrations <10 mg l(-1) did not induce sufficient oxidative damage to cause root cell death. Therefore, CBs at current environmental concentrations are unlikely to produce evident phytotoxic effects on Z. mays seedlings.

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Drought Stress Response on Some Key Enzymes of Cowpea (Vigna unguiculata L. Walp.) Nodule Metabolism

Cited by 20 publications

References 23 publications

Variation among Cowpea Genotypes in Sensitivity of Transpiration Rate and Symbiotic Nitrogen Fixation to Soil Drying

Variation among Cowpea Genotypes in Sensitivity of Transpiration Rate and Symbiotic Nitrogen Fixation to Soil Drying

Effect of rhizobia and rock biofertilizers with Acidithiobacillus on cowpea nodulation and nutrients uptake in a tableland soil

Biological responses of maize (Zea mays) plants exposed to chlorobenzenes. Case study of monochloro-, 1,4-dichloro- and 1,2,4-trichloro-benzenes

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