Salt Stress in Brassica: Effects, Tolerance Mechanisms, and Management

Shahzad, Babar; Rehman, Abdul; Tanveer, Mohsin; Wang, Lei; Park, Sang Koo; Ali, Amjed

doi:10.1007/s00344-021-10338-x

Cited by 46 publications

(25 citation statements)

References 152 publications

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“…Salinity is known to delay seed germination and to limit seed germination rate [ 2 , 40 ]. Rapeseed is a moderate salt tolerant species [ 41 , 42 ]. In this study, we recorded that in non-primed group, the germination rate in non-saline condition reached to plateau stage at day2 (95%) whereas it takes 5 days to reach the plateau (76%) under saline condition.…”

Section: Discussionmentioning

confidence: 99%

Nanoceria seed priming enhanced salt tolerance in rapeseed through modulating ROS homeostasis and α-amylase activities

Khan

et al. 2021

J Nanobiotechnol

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Background Salinity is a big threat to agriculture by limiting crop production. Nanopriming (seed priming with nanomaterials) is an emerged approach to improve plant stress tolerance; however, our knowledge about the underlying mechanisms is limited. Results Herein, we used cerium oxide nanoparticles (nanoceria) to prime rapeseeds and investigated the possible mechanisms behind nanoceria improved rapeseed salt tolerance. We synthesized and characterized polyacrylic acid coated nanoceria (PNC, 8.5 ± 0.2 nm, −43.3 ± 6.3 mV) and monitored its distribution in different tissues of the seed during the imbibition period (1, 3, 8 h priming). Our results showed that compared with the no nanoparticle control, PNC nanopriming improved germination rate (12%) and biomass (41%) in rapeseeds (Brassica napus) under salt stress (200 mM NaCl). During the priming hours, PNC were located mostly in the seed coat, nevertheless the intensity of PNC in cotyledon and radicle was increased alongside with the increase of priming hours. During the priming hours, the amount of the absorbed water (52%, 14%, 12% increase at 1, 3, 8 h priming, respectively) and the activities of α-amylase were significantly higher (175%, 309%, 295% increase at 1, 3, 8 h priming, respectively) in PNC treatment than the control. PNC primed rapeseeds showed significantly lower content of MDA, H2O2, and •O2− in both shoot and root than the control under salt stress. Also, under salt stress, PNC nanopriming enabled significantly higher K+ retention (29%) and significantly lower Na+ accumulation (18.5%) and Na+/K+ ratio (37%) than the control. Conclusions Our results suggested that besides the more absorbed water and higher α-amylase activities, PNC nanopriming improves salt tolerance in rapeseeds through alleviating oxidative damage and maintaining Na+/K+ ratio. It adds more knowledge regarding the mechanisms underlying nanopriming improved plant salt tolerance. Graphical abstract

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Section: Discussionmentioning

confidence: 99%

Nanoceria seed priming enhanced salt tolerance in rapeseed through modulating ROS homeostasis and α-amylase activities

Khan

et al. 2021

J Nanobiotechnol

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“…During the growth and development of cotton, it is often subjected to some abiotic stresses, such as drought, salinity, high temperature, and low temperature. Soil salinization is one of the biggest challenges facing world agriculture (Zhu, 2001), because salinization hinders the growth and development of plants and reduces crop yields (Shahzad et al, 2021). The saline soil contains excessive neutral salt, mainly NaCl and Na 2 SO 4 , which cause salt stress.…”

Section: Introductionmentioning

confidence: 99%

Melatonin Improves Cotton Salt Tolerance by Regulating ROS Scavenging System and Ca2 + Signal Transduction

et al. 2021

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As one of the cash crops, cotton is facing the threat of abiotic stress during its growth and development. It has been reported that melatonin is involved in plant defense against salt stress, but whether melatonin can improve cotton salt tolerance and its molecular mechanism remain unclear. We investigated the role of melatonin in cotton salt tolerance by silencing melatonin synthesis gene and exogenous melatonin application in upland cotton. In this study, applicating of melatonin can improve salt tolerance of cotton seedlings. The content of endogenous melatonin was different in cotton varieties with different salt tolerance. The inhibition of melatonin biosynthesis related genes and endogenous melatonin content in cotton resulted in the decrease of antioxidant enzyme activity, Ca2+ content and salt tolerance of cotton. To explore the protective mechanism of exogenous melatonin against salt stress by RNA-seq analysis. Melatonin played an important role in the resistance of cotton to salt stress, improved the salt tolerance of cotton by regulating antioxidant enzymes, transcription factors, plant hormones, signal molecules and Ca2+ signal transduction. This study proposed a regulatory network for melatonin to regulate cotton’s response to salt stress, which provided a theoretical basis for improving cotton’s salt tolerance.

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“…Previous studies stated that RL seemed a vital parameter for salt stress tolerance ( Ali et al, 2007 , Shahzad et al, 2021 ). Salinity effected genotypes showed reduced growth rate and it led towards minimum root length.…”

Section: Discussionmentioning

confidence: 97%

The characterization of wheat genotypes for salinity tolerance using morpho-physiological indices under hydroponic conditions

Uzair

Ali

Fiaz

et al. 2022

Saudi Journal of Biological Sciences

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Salt Stress in Brassica: Effects, Tolerance Mechanisms, and Management

Cited by 46 publications

References 152 publications

Nanoceria seed priming enhanced salt tolerance in rapeseed through modulating ROS homeostasis and α-amylase activities

Nanoceria seed priming enhanced salt tolerance in rapeseed through modulating ROS homeostasis and α-amylase activities

Melatonin Improves Cotton Salt Tolerance by Regulating ROS Scavenging System and Ca2 + Signal Transduction

The characterization of wheat genotypes for salinity tolerance using morpho-physiological indices under hydroponic conditions

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