Leaf expansion in grasses under salt stress

Taleisnik, Edith; Rodríguez, Andrés Alberto; Bustos, Dolores; Erdei, László; Ortega, Leandro; Senn, María Eugenia

doi:10.1016/j.jplph.2009.03.015

Cited by 63 publications

(60 citation statements)

References 206 publications

(246 reference statements)

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“…The decrease in leaf area is attributed to decreased leaf cellular expansion and/or to physiological disorders triggered by salt stress, accumulation of Na + and Cl -in different plant tissues and by reduction of net photosynthesis rate and chlorophyll content in leaf tissue [27,28]. Reduction in leaf area means reduction in size of the solar panel to harvest solar energy [32] Even if the rate of photosynthesis remains unaffected under stress, decrease in leaf area itself is likely to have a negative impact on total dry matter production. Potassium application (40 mg K kg -1 soil) mitigated the adverse effects of salinity stress and improved the leaf area and plant dry mass significantly (Figure 1).…”

Section: Discussionmentioning

confidence: 99%

Potassium-induced alleviation of salinity stress in Brassica campestris L.

et al. 2011

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Salinity is an important abiotic factor that adversely affects major agricultural soils of the world and hence limits crop productivity.An optimum mineral-nutrient status of plants plays critical role in determining plant tolerance to various stresses. A pot experiment was conducted on mustard (Brassica campestris L.) to study the protective role of added potassium (K, 40 mg kg -1 soil) against salinity-stress (0, 40 and 80 mM NaCl)-induced changes in plant growth, photosynthetic traits, ion accumulation, oxidative stress, enzymatic antioxidants and non-enzymatic antioxidants at 30 days after sowing. Increasing NaCl levels decreased the growth, photosynthetic traits and the leaf ascorbate and glutathione content but increased the leaf ion accumulation and oxidative stress, and the activity of antioxidant enzymes. In contrast, K-nutrition improved plant growth, photosynthetic traits, activity of antioxidant enzymes and the ascorbate and glutathione content, and reduced ion accumulation and oxidative stress traits in the leaves, more appreciably at 40 mM than at 80 mM NaCl. The study illustrates the physiological and biochemical basis of K-nutrition-induced NaCl tolerance in mustard as a means to achieving increased crop productivity in a sustainable way.

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Section: Discussionmentioning

confidence: 99%

Potassium-induced alleviation of salinity stress in Brassica campestris L.

et al. 2011

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“…In addition, soil factors, such as organic matter and nitrogen content, strongly influence plant vigor, and consequently, pod production and biomass. Finally, according to Taleisnik et al (2009), plant organs tend to show small variations in size under the same genetic background and identical growth conditions, which implies that final organ size is determined by intrinsic mechanisms. Plasticity in plant morphogenesis is a response strategy to variation in environmental conditions (temperature, light, water, and nutrient availability).…”

Section: Pheno-morphological Variationmentioning

confidence: 99%

Pheno-morphological variation, genetic diversity and population structure of Tunisian Echinus Medic (Medicago ciliaris L.)

et al. 2016

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ABSTRACT. Medicago ciliaris L., considered as a valuable genetic resource, is a good candidate for the improvement of marginal or degraded lands with low fertility or high salinity. In this study, the phenomorphological and genetic diversity were investigated in 14 Tunisian populations of M. ciliaris for the first time. Fourteen morphological traits showed significant differentiation between populations and high levels of diversity. Two amplified fragment length polymorphism primer combinations (E-AGC/M-CAA; E-AAG/M-CTG) were analyzed using an automated capillary electrophoresis system. A total of 528 loci were 2 C. Jabri et al.Genetics and Molecular Research 15 (3): gmr.15038595 generated, of which 54% were polymorphic. Allelic polymorphism ranged from 0.02 to 0.5. Significant variation between populations was found for gene diversity, mean number of alleles per locus and Shannon index for which mean values were 0.17, 0.26, and 1.57, respectively. Analysis of molecular variance revealed a high rate of genetic variation within populations. Principal component analysis and genotypic clustering discriminated M. ciliaris populations according to their geographical origin. M. ciliaris clustered into three main groups. The first group was associated with high inland and cold areas, the second was defined by low areas with mild winters while the third described low coastal areas. Similarity of morphological and molecular results indicated that either markers could be used for the study of genetic diversity in this species.

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“…It has been shown that water uptake is stimulated by cell wall loosening which reduces turgor pressure and increases the water potential gradient, but it is not clear that wall loosening would be required during rehydration. However, once a threshold level of turgor is attained, cell expansion can be controlled by the yielding capacity of the cell walls (Termaat et al 1985) and mechanosensory events associated with the wall loosening could modulate hormone levels, changing gene expression and inducing leaf development (Taleisnik et al 2009). …”

Section: Sdg20smentioning

confidence: 99%

The resurrection plant Sporobolus stapfianus: An unlikely model for engineering enhanced plant biomass?

et al. 2010

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The resurrection grass Sporobolus stapfianus Gandoger can rapidly recover from extended periods of time in the desiccated state (water potential equilibrated to 2% relative humidity) (Gaff and Ellis, Bothalia 11:305-308 1974; Gaff and Loveys, Transactions of the Malaysian Society of Plant Physiology 3:286-287 1993). Physiological studies have been conducted in S. stapfianus to investigate the responses utilised by these desiccationtolerant plants to cope with severe water-deficit. In a number of instances, more recent gene expression analyses in S. stapfianus have shed light on the molecular and cellular mechanisms mediating these responses. S. stapfianus is a versatile research tool for investigating desiccation-tolerance in vegetative grass tissue, with several useful characteristics for differentiating desiccation-tolerance adaptive genes from the many dehydration-responsive genes present in plants. A number of genes orthologous to those isolated from dehydrating S. stapfianus have been successfully used to enhance drought and salt tolerance in model plants as well as important crop species. In addition to the ability to desiccate and rehydrate successfully, the survival of resurrection plants in regions experiencing short sporadic rainfall events may depend substantially on the ability to tightly down-regulate cell division and cell wall loosening activities with decreasing water availability and then grow rapidly after rainfall while water is plentiful. Hence, an analysis of gene transcripts present in the desiccated tissue of resurrection plants may reveal important growth-related genes. Recent findings support the proposition that, as well as being a versatile model for devising strategies for protecting plants from water-loss, resurrection plants may be a very useful tool for pinpointing genes to target for enhancing growth rate and biomass production.

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Leaf expansion in grasses under salt stress

Cited by 63 publications

References 206 publications

Potassium-induced alleviation of salinity stress in Brassica campestris L.

Potassium-induced alleviation of salinity stress in Brassica campestris L.

Pheno-morphological variation, genetic diversity and population structure of Tunisian Echinus Medic (Medicago ciliaris L.)

The resurrection plant Sporobolus stapfianus: An unlikely model for engineering enhanced plant biomass?

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