Salinity Stress: A Major Constraint in Crop Production

Tuteja, Narendra; Singh, Lamabam Peter; Gill, Sarvajeet Singh; Gill, Ritu; Tuteja, Renu

doi:10.1002/9783527632930.ch4

Cited by 28 publications

(21 citation statements)

References 158 publications

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“…During the osmotic phase, dissolved salts increase the energy with which water is held in the soil, thus reducing the total water potential and causing abiotic stress (De Oliveira et al, 2013;Munns, 2002). Ionic stress, in contrast, takes place over longer time scales and is characterized by ion cytotoxicity, ultimately causing metabolic imbalances, oxidative stress (Tuteja et al, 2012), and accelerating the senescence of mature leaves (Greenway & Munns, 1980;Munns & Tester, 2008).…”

Section: Salinity Controls On Evapotranspirationmentioning

confidence: 99%

Vegetation Controls on Dryland Salinity

Perri

Suweis

Entekhabi

et al. 2018

Geophysical Research Letters

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In salt‐affected soils, salt stress causes a drastic reduction of plant transpiration. The extent of this reduction is a function of vegetation salt tolerance and can result in highly species‐specific controls on soil water budget and salinization levels. Despite their crucial role in regulating the hydrology of saline soils, the effects of salt tolerance on transpiration remain mostly unexplored. Here we propose a minimalist stochastic model of primary salinization which reproduces the hitherto overlooked feedback of salinity on the soil water balance and the active role of plant salt tolerance in modulating such an effect. We show that vegetation can exert significant control on leaching occurrence and soil salinization, thus imposing a species‐specific upper limit, Cmax, to the concentration of soluble salts in the soil. Since Cmax increases with plant salt tolerance, salt‐resilient species have the potential to sustain more saline conditions in the soil, eventually creating a favorable environment for their ecological success.

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Section: Salinity Controls On Evapotranspirationmentioning

confidence: 99%

Vegetation Controls on Dryland Salinity

Perri

Suweis

Entekhabi

et al. 2018

Geophysical Research Letters

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“…Plants grown in saline environments suffer osmotic stress and ion toxicity, which significantly reduce membrane porosity, growth rates, and yield [5]. The low rate of cell wall development and the reduction in growth are related to the osmotic stress caused by saline conditions in plants.…”

Section: Introductionmentioning

confidence: 99%

Effects of Exogenous Application of Osmotic Adjustment Substances on Growth, Pigment Concentration, and Physiological Parameters of Dracaena sanderiana Sander under Different Levels of Salinity

et al. 2020

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We evaluated two osmotic adjustment substances (glycine betaine (GB) and glycine (G) and a combination of both glycine + glycine betaine (G + GB) using two modes of application; irrigation and foliar sprays with Dracaena sanderiana plants. The plants were grown in containers and subjected to two levels of NaCl concentrations (2.0 and 7.5 dS m−1) over 8 weeks. Growth, pigment concentrations, and physiological parameters were assessed at the end of the trial. The foliar application of GB resulted in most optimal plant growth and biomass production in the presence of NaCl. The chlorophyll and carotenoid concentrations showed different trends depending on the osmotic adjustment substance applied and the mode of application. Stomatal density and dimensions varied considerably with respect to the osmotic adjustment substance supplied. The concentration of soluble sugars in leaves did not show a clear trend under the different treatments assessed. The exogenous application of G resulted in the highest concentration of free proline and proteins in leaves. The antioxidant capacity in leaves increased with both osmotic adjustment substances, and both means of application, under low and high saline conditions. We concluded that the foliar application of GB can be recommended in order to achieve cost-effective growth of D. sanderiana under saline conditions.

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“…processes, which include their newly emerging role in plant abiotic stress tolerance [23,[32][33][34][35][36]. The amino-acid sequence of PDH45 (Pea DNA helicase 45) shows 86 % similarity with the tobacco translation initiation factor eIF-4A, and 58 % with eIF-4A from Arabidopsis thaliana, maize, rice, and wheat [24].…”

Section: Introductionmentioning

confidence: 99%

Introduction of Pea DNA Helicase 45 into Sugarcane (Saccharum spp. Hybrid) Enhances Cell Membrane Thermostability and Upregulation of Stress-Responsive Genes Leads to Abiotic Stress Tolerance

et al. 2015

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DNA helicases are motor proteins that play an essential role in nucleic acid metabolism, by providing a duplex-unwinding function. To improve the drought and salinity tolerance of sugarcane, a DEAD-box helicase gene isolated from pea with a constitutive promoter, Port Ubi 2.3 was transformed into the commercial sugarcane variety Co 86032 through Agrobacterium-mediated transformation, and the transgenics were screened for tolerance to soil moisture stress and salinity. The transgene integration was confirmed through polymerase chain reaction, and the V 0 transgenic events showed significantly higher cell membrane thermostability under normal irrigated conditions. The V 1 transgenic events were screened for tolerance to soil moisture stress and exhibited significantly higher cell membrane thermostability, transgene expression, relative water content, gas exchange parameters, chlorophyll content, and photosynthetic efficiency under soil moisture stress compared to wild-type (WT). The overexpression of PDH45 transgenic sugarcane also led to the upregulation of DREB2-induced downstream stress-related genes. The transgenic events demonstrated higher germination ability and better chlorophyll retention than WT under salinity stress. Our results suggest the possibility for development of increased abiotic stress tolerant sugarcane cultivars through overexpression of PDH45 gene. Perhaps this is the first report, which provides evidence for increased drought and salinity tolerance in sugarcane through overexpression of PDH45.

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Salinity Stress: A Major Constraint in Crop Production

Cited by 28 publications

References 158 publications

Vegetation Controls on Dryland Salinity

Vegetation Controls on Dryland Salinity

Effects of Exogenous Application of Osmotic Adjustment Substances on Growth, Pigment Concentration, and Physiological Parameters of Dracaena sanderiana Sander under Different Levels of Salinity

Introduction of Pea DNA Helicase 45 into Sugarcane (Saccharum spp. Hybrid) Enhances Cell Membrane Thermostability and Upregulation of Stress-Responsive Genes Leads to Abiotic Stress Tolerance

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