Interaction of salinity and rhizobial strain on growth and N2-fixation by Acacia ampliceps

Zou, N.; Dart, P. J.; Marcar, N. E.

doi:10.1016/0038-0717(95)98611-q

Cited by 53 publications

(31 citation statements)

References 11 publications

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“…This may directly correlated with the presence of these inoculants. These results are in agreement with those reported by El-Mokadem et al, 1991; Zou et al, 1995; Rabie, 2005). Although nitrogen and protein contents as well as nitrogenase activity were significantly reduced in all treatments at higher salinity levels, inoculated plants were still higher than those of non-inoculated at corresponding salinity levels (Table 2).…”

Section: Discussionsupporting

confidence: 94%

Increased Salinity Tolerance of Cowpea Plants by Dual Inoculation of an Arbuscular Mycorrhizal FungusGlomus clarumand a Nitrogen-fixerAzospirillum brasilense

2005

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Pot greenhouse experiments were carried out to attempt to increase the salinity tolerance of one of the most popular legume of the world; cowpea; by using dual inoculation of an Am fungus Glomus clarum and a nitrogen-fixer Azospirillum brasilense. The effect of these beneficial microbes, as single- or dual inoculation-treatments, was assessed in sterilized loamy sand soil at five NaCl levels (0.0~7.2 ds/m) in irrigating water. The results of this study revealed that percentage of mycorrhizal infection, plant height, dry weight, nodule number, protein content, nitrogenase and phosphatase activities, as well as nutrient elements N, P, K, Ca, Mg were significantly decreased by increasing salinity level in non-mycorrhized plants in absence of NFB. Plants inoculated with NFB showed higher nodule numbers, protein content, nitrogen concentration and nitrogenase activities than those of non-inoculated at all salinity levels. Mycorrhized plants exhibited better improvement in all measurements than that of non-mycorrhized ones at all salinity levels, especially, in the presence of NFB. The concentration of Na+ was significantly accumulated in cowpea plants by rising salinity except in shoots of mycorrhizal plants which had K+/Na+ ratios higher than other treatments. This study indicated that dual inoculation with Am fungi and N-fixer Azospirillum can support both needs for N and P, excess of NaCl and will be useful in terms of soil recovery in saline area.

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Section: Discussionsupporting

confidence: 94%

Increased Salinity Tolerance of Cowpea Plants by Dual Inoculation of an Arbuscular Mycorrhizal FungusGlomus clarumand a Nitrogen-fixerAzospirillum brasilense

2005

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“…Many studies have demonstrated that inoculation with suitable Rhizobium sp. increase plant dry weight in legumes including Acacia nilotica , Leucaena leucocephala , Prosopis juliflora (Bala et al, 1990), Acacia ampliceps (Zou et al, 1995), Phaseolus vulgaris (Dardanelli et al, 2008), and soybean (Elsheikh and Wood, 1995) under salt stress. These beneficial effects on plant growth result from an effective N 2 -fixing symbiosis, as acetylene reduction activities were detected even at high salinity levels, depending on the Rhizobium –legume associations (Bala et al, 1990; Elsheikh and Wood, 1995; Zou et al, 1995).…”

Section: Strategies To Improve Salt Tolerance In Cropsmentioning

confidence: 99%

“…Indeed, under saline conditions, the salt-tolerant strains of Rhizobium sp. formed more effective N 2 -fixing symbiosis with A. nilotica , L. leucocephala , P. juliflora (Bala et al, 1990), A. ampliceps (Zou et al, 1995), and soybean (Elsheikh and Wood, 1995) than did the salt-sensitive strains. These results indicate that biological N 2 -fixation under saline conditions may be improved by inoculation with a salt-tolerant Rhizobium strain.…”

Section: Strategies To Improve Salt Tolerance In Cropsmentioning

confidence: 99%

New Insights on Plant Salt Tolerance Mechanisms and Their Potential Use for Breeding

et al. 2016

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Soil salinization is a major threat to agriculture in arid and semi-arid regions, where water scarcity and inadequate drainage of irrigated lands severely reduce crop yield. Salt accumulation inhibits plant growth and reduces the ability to uptake water and nutrients, leading to osmotic or water-deficit stress. Salt is also causing injury of the young photosynthetic leaves and acceleration of their senescence, as the Na+ cation is toxic when accumulating in cell cytosol resulting in ionic imbalance and toxicity of transpiring leaves. To cope with salt stress, plants have evolved mainly two types of tolerance mechanisms based on either limiting the entry of salt by the roots, or controlling its concentration and distribution. Understanding the overall control of Na+ accumulation and functional studies of genes involved in transport processes, will provide a new opportunity to improve the salinity tolerance of plants relevant to food security in arid regions. A better understanding of these tolerance mechanisms can be used to breed crops with improved yield performance under salinity stress. Moreover, associations of cultures with nitrogen-fixing bacteria and arbuscular mycorrhizal fungi could serve as an alternative and sustainable strategy to increase crop yields in salt-affected fields.

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“…Inoculation of such strains would enhance the nodulation and nitrogen fixing ability of the leguminous plants growing under saline conditions (Zahran, 1999;Ali et al, 2009). Furthermore, the ability of legume hosts to grow and survive in saline soils was also shown to improve when they were inoculated with salt-tolerant strains of rhizobia (Zou et al, 1995;Shamseldin and Werner, 2005).…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of salt-tolerant rhizobia native to the desert<br>soils of United Arab Emirates

Sharma¹,

Rao²,

Gokhale³

et al. 2013

Emir. J. Food Agric

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The salinity tolerance of naturally occurring rhizobia, isolated from the root nodules of three leguminous plants, namely sesbania (Sesbania sesban), lablab (Lablab purpureus) and pigeonpea (Cajanus cajan), growing at a research farm in Dubai (United Arab Emirates) was studied. Eight isolates identified from colony morphology and gram staining reaction, when cultured on yeast extract-mannitol agar medium (YEMA) supplemented with different concentration of sodium chloride (NaCl), produced colonies even at salinities as high as 40 dS m -1 . The rhizobial isolates were also found to be effective in nodulating 21-day old seedlings grown in potting soil and irrigated with saline water of up to 12 dS m -1 after inoculation. The tolerance to high levels of salinity and the survival and persistence in severe and harsh desert conditions make these rhizobia highly valuable inoculums to improve productivity of the leguminous plants cultivated under extreme environments.

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Interaction of salinity and rhizobial strain on growth and N2-fixation by Acacia ampliceps

Cited by 53 publications

References 11 publications

Increased Salinity Tolerance of Cowpea Plants by Dual Inoculation of an Arbuscular Mycorrhizal FungusGlomus clarumand a Nitrogen-fixerAzospirillum brasilense

Increased Salinity Tolerance of Cowpea Plants by Dual Inoculation of an Arbuscular Mycorrhizal FungusGlomus clarumand a Nitrogen-fixerAzospirillum brasilense

New Insights on Plant Salt Tolerance Mechanisms and Their Potential Use for Breeding

Isolation and characterization of salt-tolerant rhizobia native to the desert<br>soils of United Arab Emirates

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