Photosynthetic Responses of Nitrate-Fed and Nitrogen-Fixing Soybeans to Progressive Water Stress

Kirova, Elisaveta; Tzvetkova, N.; Vaseva, Irina; Ignatov, G

doi:10.1080/01904160801894988

Cited by 19 publications

(7 citation statements)

References 36 publications

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“…However, fertilized plants under water stress of both lpa1 and BAT 93 genotypes showed significant lower RWC values (88% and 86%) than control plants (93% and 92%) ( Figure S2 ). These results are in agreement with what Lodeiro et al, [ 7 ] and Kirova et al, [ 6 ] described for common beans and soybeans. However, it is difficult to estimate a reliable value of RWC because often different common bean varieties are able to change the leaf water status during the day in a way not always related to its drought tolerance/susceptibility (see for example [ 33 ]).…”

Section: Discussionsupporting

confidence: 94%

“…Because of this, the development of common bean varieties with improved water stress tolerance has been a long-time major objective for breeding programs in different regions [ 4 , 5 ]. Drought tolerance in legumes, such as common bean or soybean, differs depending on the use of alternative N 2 sources: nitrate in fertilized plants vs. fixed-N 2 in SNF plants [ 6 , 7 ]. However, common bean breeding for drought-tolerance selection is performed mainly in nitrate-fertilized plants, thus neglecting possible tolerance increase in SNF plants [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the Symbiotic Nitrogen-Fixing Common Bean Low Phytic Acid (lpa1) Mutant Response to Water Stress

Chiozzotto

Ramı́rez

Talbi

et al. 2018

Genes

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The common bean (Phaseolus vulgaris L.) low phytic acid (lpa1) biofortified genotype produces seeds with improved nutritional characteristics and does not display negative pleiotropic effects. Here we demonstrated that lpa1 plants establish an efficient nitrogen-fixing symbiosis with Rhizobium etli CE3. The lpa1 nodules showed a higher expression of nodule-function related genes than the nodules of the parental wild type genotype (BAT 93). We analyzed the response to water stress of lpa1 vs. BAT 93 plants grown under fertilized or under symbiotic N2-fixation conditions. Water stress was induced by water withholding (up to 14% soil moisture) to fertilized or R. etli nodulated plants previously grown with normal irrigation. The fertilized lpa1 plants showed milder water stress symptoms during the water deployment period and after the rehydration recovery period when lpa1 plants showed less biomass reduction. The symbiotic water-stressed lpa1 plants showed decreased nitrogenase activity that coincides with decreased sucrose synthase gene expression in nodules; lower turgor weight to dry weight (DW) ratio, which has been associated with higher drought resistance index; downregulation of carbon/nitrogen (C/N)-related and upregulation of stress-related genes. Higher expression of stress-related genes was also observed in bacteroids of stressed lpa1 plants that also displayed very high expression of the symbiotic cbb3 oxidase (fixNd).

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Section: Discussionsupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Characterization of the Symbiotic Nitrogen-Fixing Common Bean Low Phytic Acid (lpa1) Mutant Response to Water Stress

Chiozzotto

Ramı́rez

Talbi

et al. 2018

Genes

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“…Moreover, when the availability of CO 2 and biochemical activity are reduced due to water deficits, the excess reductants in the photochemical apparatus must be dissipated as heat or drained through alternative electron sinks (Miyake et al, 2009(Miyake et al, , 2010 to reduce photoinhibition and the production of reactive oxygen species (ROS). Studies have revealed that PSII of soybean plants is resistant to moderate water stress (Kirova et al, 2008), and the potential quantum efficiency of PSII (F v / F m ) and electron transport rate (ETR) are not altered by the imposition of water stress (Ohashi et al, 2006). Bertolli et al (2012) reported that the decrease in the ETR was more sensitive than the decrease of F v / F m when the relative water content declined in soybean plants (cv.…”

Section: Effects Of Water Stress On Photosynthesis In Soybean Plantsmentioning

confidence: 99%

Soybean Under Water Deficit: Physiological and Yield Responses

Souza¹,

Catuchi²,

Bertolli³

et al. 2013

A Comprehensive Survey of International Soybean Research - Genetics, Physiology, Agronomy and Nitrogen Relationships

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“…The effects of salt stress on N fixation have been widely described in legumes (Zahran 1991;Delgado et al 1994). However, it has been reported that nodulated legumes might be more tolerant to environmental stress than N-fertilised legumes (Antolin et al 1995;Frechilla et al 2000;Lodeiro et al 2000;Kirova et al 2008). Hence, it would appear feasible to use biological N fixation and inoculation techniques, combining selected strains and cultivars, in order to increase the performance and yield of legumes under environmental constraints.…”

Section: Introductionmentioning

confidence: 99%

Effects of salt stress and rhizobial inoculation on growth and nitrogen fixation of three peanut cultivars

et al. 2012

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Increasing soil salinity represents a major constraint for agriculture in arid and semi-arid lands, where mineral nitrogen (N) deficiency is also a frequent characteristic of soils. Biological N fixation by legumes may constitute a sustainable alternative to chemical fertilisation in salinity-affected areas, provided that adapted cultivars and inoculants are available. Here, the performance of three peanut cultivars nodulated with two different rhizobial strains that differ in their salt tolerance was evaluated under moderately saline water irrigation and compared with that of N-fertilised plants. Shoot weight was used as an indicator of yield. Under non-saline conditions, higher yields were obtained using N fertilisation rather than inoculation for all the varieties tested. However, under salt stress, the yield of inoculated plants became comparable to that of N-fertilised plants, with minor differences depending on the peanut cultivar and rhizobial strain. Our results indicate that N fixation might represent an economical, competitive and environmentally friendly choice with respect to mineral N fertilisation for peanut cultivation under moderate saline conditions.

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Photosynthetic Responses of Nitrate-Fed and Nitrogen-Fixing Soybeans to Progressive Water Stress

Cited by 19 publications

References 36 publications

Characterization of the Symbiotic Nitrogen-Fixing Common Bean Low Phytic Acid (lpa1) Mutant Response to Water Stress

Characterization of the Symbiotic Nitrogen-Fixing Common Bean Low Phytic Acid (lpa1) Mutant Response to Water Stress

Soybean Under Water Deficit: Physiological and Yield Responses

Effects of salt stress and rhizobial inoculation on growth and nitrogen fixation of three peanut cultivars

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