Potassium: A track to develop salinity tolerant plants

Kumari, Sweety; Chhillar, Himanshu; Chopra, Priyanka; Khanna, Risheek Rahul; Khan, M. Iqbal R.

doi:10.1016/j.plaphy.2021.09.031

Cited by 63 publications

(32 citation statements)

References 178 publications

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“…Potassium homeostasis is necessary during salinity stress indicating that potassium is a determinant factor for salinity tolerance [ 54 ]. Genotype 03 (Matador) showed higher K accumulation than genotype 22 (PI 340261) in root tissues [ 31 ].…”

Section: Discussionmentioning

confidence: 99%

Deciphering Molecular Mechanisms Involved in Salinity Tolerance in Guar (Cyamopsis tetragonoloba (L.) Taub.) Using Transcriptome Analyses

Sandhu

Dueñas

Ferreira

et al. 2022

Plants

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Guar is a commercially important legume crop known for guar gum. Guar is tolerant to various abiotic stresses, but the mechanisms involved in its salinity tolerance are not well established. This study aimed to understand molecular mechanisms of salinity tolerance in guar. RNA sequencing (RNA-Seq) was employed to study the leaf and root transcriptomes of salt-tolerant (Matador) and salt-sensitive (PI 340261) guar genotypes under control and salinity. Our analyses identified a total of 296,114 unigenes assembled from 527 million clean reads. Transcriptome analysis revealed that the gene expression differences were more pronounced between salinity treatments than between genotypes. Differentially expressed genes associated with stress-signaling pathways, transporters, chromatin remodeling, microRNA biogenesis, and translational machinery play critical roles in guar salinity tolerance. Genes associated with several transporter families that were differentially expressed during salinity included ABC, MFS, GPH, and P-ATPase. Furthermore, genes encoding transcription factors/regulators belonging to several families, including SNF2, C2H2, bHLH, C3H, and MYB were differentially expressed in response to salinity. This study revealed the importance of various biological pathways during salinity stress and identified several candidate genes that may be used to develop salt-tolerant guar genotypes that might be suitable for cultivation in marginal soils with moderate to high salinity or using degraded water.

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Section: Discussionmentioning

confidence: 99%

Deciphering Molecular Mechanisms Involved in Salinity Tolerance in Guar (Cyamopsis tetragonoloba (L.) Taub.) Using Transcriptome Analyses

Sandhu

Dueñas

Ferreira

et al. 2022

Plants

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“…An enlarged and expanded root system with better capability to absorb nutrients from the soil has been associated with the tolerance to osmotic stress in several species such as maize and coffee (Ober and Sharp, 2003;Pinheiro et al, 2005;Sharp et al, 2006). The capacity of roots to absorb and retain K + together with the whole plant K+/Na+ ratio is one of the mechanisms that has been correlated with salt-tolerance (Kumari et al, 2021;Tao et al, 2021). It is already known that soil salinity can induce nutrient deficiency due to the similar chemical properties of Na + and K + (Hasanuzzaman et al, 2018).…”

Section: Salinity and Nutrient Deficienciesmentioning

confidence: 99%

Effects of Combined Abiotic Stresses Related to Climate Change on Root Growth in Crops

2022

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Climate change is a major threat to crop productivity that negatively affects food security worldwide. Increase in global temperatures are usually accompanied by drought, flooding and changes in soil nutrients composition that dramatically reduced crop yields. Against the backdrop of climate change, human population increase and subsequent rise in food demand, finding new solutions for crop adaptation to environmental stresses is essential. The effects of single abiotic stress on crops have been widely studied, but in the field abiotic stresses tend to occur in combination rather than individually. Physiological, metabolic and molecular responses of crops to combined abiotic stresses seem to be significantly different to individual stresses. Although in recent years an increasing number of studies have addressed the effects of abiotic stress combinations, the information related to the root system response is still scarce. Roots are the underground organs that directly contact with the soil and sense many of these abiotic stresses. Understanding the effects of abiotic stress combinations in the root system would help to find new breeding tools to develop more resilient crops. This review will summarize the current knowledge regarding the effects of combined abiotic stress in the root system in crops. First, we will provide a general overview of root responses to particular abiotic stresses. Then, we will describe how these root responses are integrated when crops are challenged to the combination of different abiotic stress. We will focus on the main changes on root system architecture (RSA) and physiology influencing crop productivity and yield and convey the latest information on the key molecular, hormonal and genetic regulatory pathways underlying root responses to these combinatorial stresses. Finally, we will discuss possible directions for future research and the main challenges needed to be tackled to translate this knowledge into useful tools to enhance crop tolerance.

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“…At a salinity level of 8 dS m −1 , the minimum leaf K concentration was observed, which was 18.6% less than the control with no foliar K application. Comprehending the salinity-nutrient relationships is of vast economic significance since nutrients may offer protective mechanisms against salinity stress by lowering ion toxicity via dilution effect, competitive ion uptake and involvement with osmotic adjustment, retaining ion balance and scavenging of ROS under saline environment [25]. Increased salinity caused a decline in leaf K concentration [28,29].…”

Section: Potassium Concentration In Spinach Leavesmentioning

confidence: 99%

“…In the current study the antioxidant enzymes (SOD and CAT) activity was reduced in treatments where sufficient K nutrition was applied. It has been suggested that the ROS production can be decreased to a greater extent with the improved status of K nutrition in plants as improving K nutrition helps reduce activity of NAD(P)H oxidases and maintains photosynthetic electron transport; as a result, the activity of antioxidant enzymes reduces with K application [25,74].…”

Section: Activity Of Catalasementioning

confidence: 99%

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Foliar Application of Potassium Mitigates Salinity Stress Conditions in Spinach (Spinacia oleracea L.) through Reducing NaCl Toxicity and Enhancing the Activity of Antioxidant Enzymes

et al. 2021

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Agronomic biofortification is the purposeful utilization of mineral fertilizers to increase the concentration of desired minerals in edible plant parts for enhancing their dietary intake. It is becoming crucial to enhance the dietary intake of K for addressing hidden hunger and related health issues such as cardiac diseases and hypertension. This study was designed to enhance the potassium concentration in edible parts of spinach through its foliar application under saline environment. The salinity levels of electrical conductivity (EC) = 4, 6, and 8 dS m−1 were applied using sodium chloride (NaCl) along with control. The levels of K for foliar sprays were 5 and 10 mM, along with control. The present experiment was performed under two factorial arrangements in a completely randomized design (CRD). After 60 days of sowing, the crop was harvested. Data regarding growth, ionic, physiological, and biochemical parameters, i.e., shoot dry weight, relative water content, electrolyte leakage, total chlorophyll content, tissue sodium (Na) and K concentration, activities of superoxide dismutase (SOD), and catalase (CAT) were recorded and those were found to be significantly (p ≤ 0.05) affected by foliar application of K on spinach under saline conditions. The highest growth, physiological and biochemical responses of spinach were observed in response to foliar-applied K at 10 mM. It is concluded that agronomic bio-fortification by foliar use of K can be a useful strategy to increase tissue K intakes and minimize Na toxicity in the vegetables studied under saline conditions.

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Potassium: A track to develop salinity tolerant plants

Cited by 63 publications

References 178 publications

Deciphering Molecular Mechanisms Involved in Salinity Tolerance in Guar (Cyamopsis tetragonoloba (L.) Taub.) Using Transcriptome Analyses

Deciphering Molecular Mechanisms Involved in Salinity Tolerance in Guar (Cyamopsis tetragonoloba (L.) Taub.) Using Transcriptome Analyses

Effects of Combined Abiotic Stresses Related to Climate Change on Root Growth in Crops

Foliar Application of Potassium Mitigates Salinity Stress Conditions in Spinach (Spinacia oleracea L.) through Reducing NaCl Toxicity and Enhancing the Activity of Antioxidant Enzymes

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