Sorghum under saline conditions: responses, tolerance mechanisms, and management strategies

Mansour, Mohamed Magdy F.; Emam, Manal A.; Salama, Karima H. A.; Morsy, A. Ahmed

doi:10.1007/s00425-021-03671-8

Cited by 36 publications

(33 citation statements)

References 174 publications

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“…On the other hand, the SOD, POD, and CAT activities are enhanced, and the accumulation of non-enzymatic substances (GSH and Car) is increased to alleviate the toxic effects generated by ROS by scavenging superoxide anion free radical, hydrogen peroxide, and hydroxyl radicals. 12 , 32 The contents of SS and K + in rapeseed seedlings reduced at different levels of soil salinity in this study, which was consistent with the results of Mansour et al 26 However, Zhao et al 33 found that the content of SS increased with the increasing of soil salinity. It may be due to that the content of SS, one of the initial products of photosynthesis, 34 could be reduced for the suppression of photosynthesis caused by salt stress.…”

Section: Discussionsupporting

confidence: 91%

Nitrogen application alleviates salt stress by enhancing osmotic balance, ROS scavenging, and photosynthesis of rapeseed seedlings (Brassica napus)

Tian

Wang

et al. 2022

Plant Signaling & Behavior

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Nitrogen application could alleviate salt stress on crops, but the specific physiological mechanism is still unclear. Therefore, in this study, a pot experiment was conducted to explore the effects of different application rates of nitrogen (0, 0.15, 0.30, and 0.45 g·kg −1 ) on the growth parameters, osmotic adjustment, reactive oxygen species scavenging, and photosynthesis of rapeseed seedlings planted in the soils with different concentrations of sodium chloride (1.5, 3.5, 5.5, and 7.5 g·kg −1 ). The results showed that nitrogen could alleviate the inhibition of salt on rapeseed growth, and improve the antioxidant enzyme activities and the contents of non-enzymatic substances, K + , soluble protein (SP), soluble sugar (SS), and proline. Besides, there was a significant correlation between the indexes of active oxygen scavenging system, osmoregulation system, and photosynthesis. Therefore, applying appropriate amount of nitrogen can promote the growth and development of rapeseed seedlings under salt stress, accelerate the scavenging of reactive oxygen species, maintain osmotic balance, and promote photosynthesis. This study will improve our understanding on the mechanism by which nitrogen application alleviates salt stress to crops.

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Section: Discussionsupporting

confidence: 91%

Nitrogen application alleviates salt stress by enhancing osmotic balance, ROS scavenging, and photosynthesis of rapeseed seedlings (Brassica napus)

Tian

Wang

et al. 2022

Plant Signaling & Behavior

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“…To date, research on the molecular mechanisms of salt tolerance mainly focuses on the model plants or non-halophytic species. Halophytic grass, especially halophyte without specific structures such as salt-gland, has evolved the mechanism adaptive to salt stress, and attracts more attention ( Mansour et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

“…Soil salinization is a key environmental factor that adversely affects plant growth and crop productivity (Flowers and Yeo, 1995;Tester and Davenport, 2003). Better understanding of the plant salt tolerance mechanism benefits crop genetic improvement (Mansour et al, 2021). To adapt salt stress, plants develop a large number of physiological, biochemical, and molecular strategies to respond and defend to stress (Chen et al, 2018;Van Zelm et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

A Novel Transcriptional Regulator HbERF6 Regulates the HbCIPK2-Coordinated Pathway Conferring Salt Tolerance in Halophytic Hordeum brevisubulatum

Jiang

Zhang

et al. 2022

Front. Plant Sci.

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Halophytic Hordeum brevisubulatum is a perennial grass which has evolved many distinctive salt-adaptive mechanisms. Our previous studies indicated it could thrive under salt stress through maintaining better K+ and Na+ homeostasis. Stress-responsive HbCIPK2 can phosphorylate K+ channel HbVGKC1 and Na+ transporter HbSOS1L to prevent Na+ accumulation and K+ reduction, hence pathway was not detected in glycophytic plants. In this study, we cloned the inducible promoter of HbCIPK2 by genome-walking, and identified a novel transcriptional regulator HbERF6 through yeast one-hybrid screening. HbERF6 functioned as a transcription factor which can bind to the GCC-box of the HbCIPK2 promoter to activate its expression. HbERF6 transgenic lines in Arabidopsis improved salt tolerance compared with wild type, and especially induced AtCIPK24 (SOS2) expression, resulting in K+/Na+ homeostasis to enhance salt tolerance. All the results confirmed the inducible function of HbERF6 for CIPK genes during salt tolerance. This regulatory network that integrates transcriptional regulation and post-translation modification will unravel a novel salt stress-responsive mechanism, highlighting the value and utilization of the halophytic resource.

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“…The mechanism of plants to respond and adapt to salt stress is complex. Many biological processes in plants are affected under salt stress, such as photosynthesis, ion balance, energy metabolism, secondary metabolism, and protein synthesis [4,5]. The transcriptional level of many genes changed in these processes [6,7].…”

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptome Analysis of Two Sweet Sorghum Genotypes with Different Salt Tolerance Abilities to Reveal the Mechanism of Salt Tolerance

Chen

Shang

Sun

et al. 2022

IJMS

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Sweet sorghum is a C4 crop that can be grown for silage forage, fiber, syrup and fuel production. It is generally considered a salt-tolerant plant. However, the salt tolerance ability varies among genotypes, and the mechanism is not well known. To further uncover the salt tolerance mechanism, we performed comparative transcriptome analysis with RNA samples in two sweet sorghum genotypes showing different salt tolerance abilities (salt-tolerant line RIO and salt-sensitive line SN005) upon salt treatment. These response processes mainly focused on secondary metabolism, hormone signaling and stress response. The expression pattern cluster analysis showed that RIO-specific response genes were significantly enriched in the categories related to secondary metabolic pathways. GO enrichment analysis indicated that RIO responded earlier than SN005 in the 2 h after treatment. In addition, we identified more transcription factors (TFs) in RIO than SN005 that were specifically expressed differently in the first 2 h of salt treatment, and the pattern of TF change was obviously different. These results indicate that an early response in secondary metabolism might be essential for salt tolerance in sweet sorghum. In conclusion, we found that an early response, especially in secondary metabolism and hormone signaling, might be essential for salt tolerance in sweet sorghum.

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Sorghum under saline conditions: responses, tolerance mechanisms, and management strategies

Cited by 36 publications

References 174 publications

Nitrogen application alleviates salt stress by enhancing osmotic balance, ROS scavenging, and photosynthesis of rapeseed seedlings (Brassica napus)

Nitrogen application alleviates salt stress by enhancing osmotic balance, ROS scavenging, and photosynthesis of rapeseed seedlings (Brassica napus)

A Novel Transcriptional Regulator HbERF6 Regulates the HbCIPK2-Coordinated Pathway Conferring Salt Tolerance in Halophytic Hordeum brevisubulatum

Comparative Transcriptome Analysis of Two Sweet Sorghum Genotypes with Different Salt Tolerance Abilities to Reveal the Mechanism of Salt Tolerance

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