scholarly journals Natural and Synthetic Hydrophilic Polymers Enhance Salt and Drought Tolerance of Metasequoia glyptostroboides Hu and W.C.Cheng Seedlings

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 643 ◽  
Author(s):  
Jing Li ◽  
Xujun Ma ◽  
Gang Sa ◽  
Dazhai Zhou ◽  
Xiaojiang Zheng ◽  
...  
Keyword(s):  
Salt Stress ◽  
Synthetic Polymers ◽  
Hydrophilic Polymers ◽  
Water Retention Capacity ◽  
Saline Stress ◽  
Metasequoia Glyptostroboides ◽  
Leaf Injury ◽  
Drought And Salt Tolerance ◽  
Drought And Salt Stress ◽  
Synthetic Hydrogels

We compared the effects of hydrophilic polymer amendments on drought and salt tolerance of Metasequoia glyptostroboides Hu and W.C.Cheng seedlings using commercially available Stockosorb and Luquasorb synthetic hydrogels and a biopolymer, Konjac glucomannan (KGM). Drought, salinity, or the combined stress of both drought and salinity caused growth retardation and leaf injury in M. glyptostroboides. Under a range of simulated stress conditions, biopolymers and synthetic hydrogels alleviated growth inhibition and leaf injury, improved photosynthesis, and enhanced whole-plant and unit transpiration. For plants subjected to drought conditions, Stockosorb hydrogel amendment specifically caused a remarkable increase in water supply to roots due to the water retention capacity of the granular polymer. Under saline stress, hydrophilic polymers restricted Na+ and Cl− concentrations in roots and leaves. Moreover, root K+ uptake resulted from K+ enrichment in Stockosorb and Luquasorb granules. Synthetic polymers and biopolymers increased the ability of M. glyptostroboides to tolerate combined impacts of drought and salt stress due to their water- and salt-bearing capacities. Similar to the synthetic polymers, the biopolymer also enhanced M. glyptostroboides drought and salt stress tolerance.

scholarly journals Knockdown of 60S ribosomal protein L14-2 reveals their potential regulatory roles to enhance drought and salt tolerance in cotton

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Margaret Linyerera SHIRAKU ◽  
Richard Odongo MAGWANGA ◽  
Xiaoyan CAI ◽  
Joy Nyangasi KIRUNGU ◽  
Yanchao XU ◽  
...  
Keyword(s):  
Salt Stress ◽  
Ribosomal Protein ◽  
Large Scale ◽  
Natural Fiber ◽  
Substantial Reduction ◽  
Regulatory Elements ◽  
Scale Production ◽  
Drought And Salt Tolerance ◽  
Drought And Salt Stress ◽  
Effects Of Drought

Abstract Background Cotton is a valuable economic crop and the main significant source of natural fiber for textile industries globally. The effects of drought and salt stress pose a challenge to strong fiber and large-scale production due to the ever-changing climatic conditions. However, plants have evolved a number of survival strategies, among them is the induction of various stress-responsive genes such as the ribosomal protein large (RPL) gene. The RPL gene families encode critical proteins, which alleviate the effects of drought and salt stress in plants. In this study, comprehensive and functional analysis of the cotton RPL genes was carried out under drought and salt stresses. Results Based on the genome-wide evaluation, 26, 8, and 5 proteins containing the RPL14B domain were identified in Gossypium hirsutum, G. raimondii, and G. arboreum, respectively. Furthermore, through bioinformatics analysis, key cis-regulatory elements related to RPL14B genes were discovered. The Myb binding sites (MBS), abscisic acid-responsive element (ABRE), CAAT-box, TATA box, TGACG-motif, and CGTCA-motif responsive to methyl jasmonate, as well as the TCA-motif responsive to salicylic acid, were identified. Expression analysis revealed a key gene, Gh_D01G0234 (RPL14B), with significantly higher induction levels was further evaluated through a reverse genetic approach. The knockdown of Gh_D01G0234 (RPL14B) significantly affected the performance of cotton seedlings under drought/salt stress conditions, as evidenced by a substantial reduction in various morphological and physiological traits. Moreover, the level of the antioxidant enzyme was significantly reduced in VIGS-plants, while oxidant enzyme levels increased significantly, as demonstrated by the higher malondialdehyde concentration level. Conclusion The results revealed the potential role of the RPL14B gene in promoting the induction of antioxidant enzymes, which are key in oxidizing the various oxidants. The key pathways need to be investigated and even as we exploit these genes in the developing of more stress-resilient cotton germplasms.

GhWRKY46 from Upland Cotton positively Regulates the Drought and Salt stress Responses in Plant

2021 ◽  
pp. 104438
Author(s):  
Yu Li ◽  
Hao Chen ◽  
Shengting Li ◽  
Cuiling Yang ◽  
Qunying Ding ◽  
...  
Keyword(s):  
Salt Stress ◽  
Stress Responses ◽  
Upland Cotton ◽  
Drought And Salt Stress

scholarly journals Evaluation of Indigenous Olive Biocontrol Rhizobacteria as Protectants against Drought and Salt Stress

2021 ◽  
Vol 9 (6) ◽  
pp. 1209
Author(s):  
Nuria Montes-Osuna ◽  
Carmen Gómez-Lama Cabanás ◽  
Antonio Valverde-Corredor ◽  
Garikoitz Legarda ◽  
Pilar Prieto ◽  
...  
Keyword(s):  
Salt Stress ◽  
Abiotic Stresses ◽  
Biochemical Parameters ◽  
Biocontrol Agent ◽  
Negative Effects ◽  
Experimental Conditions ◽  
Acds Gene ◽  
Drought And Salt Stress ◽  
Physiological And Biochemical

Stress caused by drought and salinity may compromise growth and productivity of olive (Olea europaea L.) tree crops. Several studies have reported the use of beneficial rhizobacteria to alleviate symptoms produced by these stresses, which is attributed in some cases to the activity of 1-aminocyclopropane-1-carboxylic acid deaminase (ACD). A collection of beneficial olive rhizobacteria was in vitro screened for ACD activity. Pseudomonas sp. PICF6 displayed this phenotype and sequencing of its genome confirmed the presence of an acdS gene. In contrast, the well-known root endophyte and biocontrol agent Pseudomonas simiae PICF7 was defective in ACD activity, even though the presence of an ACD-coding gene was earlier predicted in its genome. In this study, an unidentified deaminase was confirmed instead. Greenhouse experiments with olive ‘Picual’ plants inoculated either with PICF6 or PICF7, or co-inoculated with both strains, and subjected to drought or salt stress were carried out. Several physiological and biochemical parameters increased in stressed plants (i.e., stomatal conductance and flavonoids content), regardless of whether or not they were previously bacterized. Results showed that neither PICF6 (ACD positive) nor PICF7 (ACD negative) lessened the negative effects caused by the abiotic stresses tested, at least under our experimental conditions.

scholarly journals Expression Analyses of Soybean VOZ Transcription Factors and the Role of GmVOZ1G in Drought and Salt Stress Tolerance

2020 ◽  
Vol 21 (6) ◽  
pp. 2177 ◽  
Author(s):  
Bo Li ◽  
Jia-Cheng Zheng ◽  
Ting-Ting Wang ◽  
Dong-Hong Min ◽  
Wen-Liang Wei ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Transcription Factors ◽  
Salt Stress ◽  
Abiotic Stress ◽  
Stress Tolerance ◽  
Zinc Finger ◽  
Hairy Roots ◽  
Yeast Cells ◽  
Salt Stress Tolerance ◽  
Drought And Salt Stress

Vascular plant one-zinc-finger (VOZ) transcription factor, a plant specific one-zinc-finger-type transcriptional activator, is involved in regulating numerous biological processes such as floral induction and development, defense against pathogens, and response to multiple types of abiotic stress. Six VOZ transcription factor-encoding genes (GmVOZs) have been reported to exist in the soybean (Glycine max) genome. In spite of this, little information is currently available regarding GmVOZs. In this study, GmVOZs were cloned and characterized. GmVOZ genes encode proteins possessing transcriptional activation activity in yeast cells. GmVOZ1E, GmVOZ2B, and GmVOZ2D gene products were widely dispersed in the cytosol, while GmVOZ1G was primarily located in the nucleus. GmVOZs displayed a differential expression profile under dehydration, salt, and salicylic acid (SA) stress conditions. Among them, GmVOZ1G showed a significantly induced expression in response to all stress treatments. Overexpression of GmVOZ1G in soybean hairy roots resulted in a greater tolerance to drought and salt stress. In contrast, RNA interference (RNAi) soybean hairy roots suppressing GmVOZ1G were more sensitive to both of these stresses. Under drought treatment, soybean composite plants with an overexpression of hairy roots had higher relative water content (RWC). In response to drought and salt stress, lower malondialdehyde (MDA) accumulation and higher peroxidase (POD) and superoxide dismutase (SOD) activities were observed in soybean composite seedlings with an overexpression of hairy roots. The opposite results for each physiological parameter were obtained in RNAi lines. In conclusion, GmVOZ1G positively regulates drought and salt stress tolerance in soybean hairy roots. Our results will be valuable for the functional characterization of soybean VOZ transcription factors under abiotic stress.

scholarly journals Application of Hyperspectral Imaging in the Assessment of Drought and Salt Stress in Magneto-Primed Triticale Seeds

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 835
Author(s):  
Jose Alvarez ◽  
Elvira Martinez ◽  
Belén Diezma
Keyword(s):  
Salt Stress ◽  
Hyperspectral Imaging ◽  
Human Observer ◽  
Negative Effects ◽  
Stress Symptoms ◽  
Data Variability ◽  
Drought And Salt Stress ◽  
The One ◽  
Almost All ◽  
Germination Parameters

Hyperspectral imaging is an appropriate method to thoroughly investigate the microscopic structure of internally heterogeneous agro-food products. By using hyperspectral technology, identifying stress symptoms associated with salinity, before a human observer, is possible, and has obvious benefits. The objective of this paper was to prove the suitability of this technique for the analysis of Triticale seeds subjected to both magneto-priming and drought and salt stress conditions, in terms of image differences obtained among treatments. It is known that, on the one hand, drought and salt stress treatments have negative effects on seeds of almost all species, and on the other hand, magneto-priming enhances seed germination parameters. Thus, this study aimed to relate hyperspectral imaging values—neither positive nor negative in themselves—to the effects mentioned above. Two main conclusions were reached: Firstly, the hyperspectral application is a feasible method for exploring the Triticale structure and for making distinctions under different drought and salt stress treatments, in line with the data variability obtained. Secondly, the lower spectral reflectance in some treatments—in the 400–1000 nm segment—is the result of a great number of chemical compounds in the seed that could be related to magneto-priming.

scholarly journals A Subset of Arabidopsis RAV Transcription Factors Modulates Drought and Salt Stress Responses Independent of ABA

2014 ◽  
Vol 55 (11) ◽  
pp. 1892-1904 ◽  
Author(s):  
Minjie Fu ◽  
Hyun Kyung Kang ◽  
Seung-Hyun Son ◽  
Seong-Ki Kim ◽  
Kyoung Hee Nam
Keyword(s):  
Transcription Factors ◽  
Salt Stress ◽  
Stress Responses ◽  
Drought And Salt Stress

scholarly journals Silencing of The Slzf-31 Gene Decreases The Salt Stress Tolerance And Drought Tolerance Of Tomato

2021 ◽  
Author(s):  
Tong Pei ◽  
Yufang Bao ◽  
Tairu Wu ◽  
Ziyu Wang ◽  
Yue Wang ◽  
...  
Keyword(s):  
Salt Stress ◽  
Drought Stress ◽  
Virus Induced Gene Silencing ◽  
Chlorophyll Fluorescence Parameters ◽  
Tomato Plants ◽  
Drought And Salt Stress ◽  
Stem Bending ◽  
Physiological Indexes ◽  
Mda Content ◽  
Aba Content

Abstract The SlZF-31 gene is a member of the tomato C2H2 transcription factor family. Previous studies have shown that SlZF-31 gene expression is upregulated under drought stress and salt stress, but the specific function of this gene in tomato plants in response to these two kinds of stress is still unclear. To further explore the function of the SlZF-31 gene in tomato under drought stress and salt stress, we employed the virus-induced gene silencing (VIGS) method to reduce the expression of the SlZF-31 gene in tomato. The results showed that TRV2-SlZF-31 plants had higher levels of wilt and stem bending than CK and CK-TRV2 plants under drought and salt stress. The ABA content of TRV2-SlZF-31 plants were lower than those of CK and CK-TRV2 plants. The analysis of physiological indexes showed that the SOD and POD activity and the PRO content of TRV2-SlZF-31 plants were lower than those of CK and CK-TRV2 plants, while the MDA content of TRV2-SLlZF-31 plants was higher than those of CK and CK-TRV2 plants. The accumulation of H2O2 and O2- in TRV2-SlZF-31 plants was greater than those in CK and CK-TRV2 plants. The values of the chlorophyll fluorescence parameters (ΦII and qL) of TRV2-SlZF-31 plants were significantly lower than those of CK and CK-TRV2 plants. These results showed that the silencing of the SlZF-31 gene reduces the drought resistance and salt tolerance of tomato.

scholarly journals Transcriptomic responses to drought and salt stress in desert treeProsopis juliflora

2017 ◽  
Vol 1 (Special Issue-Supplement) ◽  
pp. 291-291 ◽  
Author(s):  
Suja George ◽  
Deepeka Manoharan ◽  
Jie Li ◽  
Monica Britton ◽  
Ajay Parida
Keyword(s):  
Salt Stress ◽  
Drought And Salt Stress ◽  
Transcriptomic Responses

scholarly journals Knockdown of 60S Ribosomal Protein L14-2 Reveals Their Potential Regulatory Roles in Enhancing Drought and Salt Tolerance in Cotton

2021 ◽  
Author(s):  
Margaret shiraku ◽  
Richard Odongo Magwanga ◽  
Xiaoyan Cai ◽  
Joy Nyangasi Kirungu ◽  
Yanchao Xu ◽  
...  
Keyword(s):  
Salt Stress ◽  
Ribosomal Protein ◽  
Candidate Gene ◽  
Regulatory Elements ◽  
Stress Conditions ◽  
Stress Factors ◽  
Positive Effects ◽  
Drought And Salt Tolerance ◽  
Drought And Salt Stresses ◽  
Effects Of Drought

Abstract BackgroundCotton is an important economic crop and the primary source of natural fiber. The effects of drought and salt stresses threaten strong fiber and large quantity production. However, due to the ever-changing climatic conditions, plants have evolved various mechanisms to cope with the effects of various stress factors. One of the plant's transcription factors with positive effects in alleviating effects of drought and salt stresses is the Ribosomal protein Large (RPL) gene families. This has prompted the functional characterization of the RPL14B gene previously identified in the QTL region as a candidate gene that responds to stress and initiates mechanisms that enhance stress tolerance. ResultsComprehensive identification and functional analysis were conducted in this study, in which 26, 8, and 5 proteins containing the RPL14B domain were identified in G. hirsutum, G. raimondii, and G. arboreum, respectively. Moreover, Cis-regulatory elements associated with the RPL genes were identified. The Myb binding sites (MBS), Myb, Abscisic acid-responsive element (ABRE), CAAT-box, TATA box, TGACG-motif, and CGTCA-motif responsive to Meja, and TCA- motif responsive to salicylic acid were identified. Validation of the candidate gene through virus-induced gene silencing (VIGS) revealed that the Gh_D01G0234 (RPL14B) knockdown significantly affected the cotton seedling's performance under drought/ salt stress conditions as evidenced by a significant reduction in various morphological and physiological traits. Moreover, antioxidant enzyme levels were significantly reduced in VIGS-plants, with substantially higher oxidant enzyme levels, as evidenced by the higher concentration level of Malondialdehyde (MDA). ConclusionThe results revealed the potential role of the gene, and it can be further exploited to breed climate-smart cotton varieties resilient to drought and salt stress conditions

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