scholarly journals Effects of Salt-Drought Stress on Growth and Physiobiochemical Characteristics ofTamarix chinensisSeedlings

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Junhua Liu ◽  
Jiangbao Xia ◽  
Yanming Fang ◽  
Tian Li ◽  
Jingtao Liu
Keyword(s):  
Salt Stress ◽  
Drought Stress ◽  
Oxidation Resistance ◽  
Stress Resistance ◽  
Salt Resistance ◽  
Severe Drought ◽  
Tamarix Chinensis ◽  
Biochemical Characteristics ◽  
Factors Influencing ◽  
Salt And Drought Stresses

The present study was designed to clarify the effects of salinity and water intercross stresses on the growth and physiobiochemical characteristics ofTamarix chinensisseedlings by pots culture under the artificial simulated conditions. The growth, activities of SOD, POD, and contents of MDA and osmotic adjusting substances of three years old seedlings ofT. chinensiswere studied under different salt-drought intercross stress. Results showed that the influence of salt stress on growth was greater than drought stress, the oxidation resistance of SOD and POD weakened gradually with salt and drought stresses intensified, and the content of MDA was higher under severe drought and mild and moderate salt stresses. The proline contents increased with the stress intensified but only significantly higher than control under the intercross stresses of severe salt-severe drought. It implied thatT. chinensiscould improve its stress resistance by adjusted self-growth and physiobiochemical characteristics, and the intercross compatibility ofT. chinensisto salt and drought stresses can enhance the salt resistance under appropriate drought stress, but the dominant factors influencing the physiological biochemical characteristics ofT. chinensiswere various with the changing of salt-drought intercross stresses gradients.

scholarly journals Proteome Analysis of Date Palm (Phoenix dactylifera L.) under Severe Drought and Salt Stress

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Haddad A. El Rabey ◽  
Abdulrahman L. Al-Malki ◽  
Khalid O. Abulnaja
Keyword(s):  
Salt Stress ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Date Palm ◽  
Proteome Analysis ◽  
Rubisco Activase ◽  
2D Electrophoresis ◽  
Severe Drought ◽  
Protein Abundance ◽  
Low Protein

Date palm cultivars differently tolerate salinity and drought stress. This study was carried out to study the response of date palm to severe salinity and drought based on leaf proteome analysis. Eighteen-month-old date palm plants were subjected to severe salt (48 g/L NaCl) and drought (82.5 g/L PEG or no irrigation) conditions for one month. Using a protein 2D electrophoresis method, 55 protein spots were analyzed using mass spectrometry. ATP synthase CF1 alpha chains were significantly upregulated under all three stress conditions. Changes in the abundance of RubisCO activase and one of the RubisCO fragments were significant in the same spots only for salt stress and drought stress with no irrigation, and oxygen-evolving enhancer protein 2 was changed in different spots. Transketolase was significantly changed only in drought stress with PEG. The expression of salt and drought stress genes of the chosen protein spots was either overexpressed or downexpressed as revealed by the high or low protein abundance, respectively. In addition, all drought tolerance genes due to no irrigation were downregulated. In conclusion, the proteome analysis of date palm under salinity and drought conditions indicated that both salinity and drought tolerance genes were differentially expressed resulting in high or low protein abundance of the chosen protein spots as a result of exposure to drought and salinity stress condition.

scholarly journals Selenium-induced improvements in the ornamental value and salt stress resistance of Plectranthus scutellarioides (L.) R. Br.

2019 ◽  
Vol 31 (1) ◽  
pp. 213-221
Author(s):  
Barbara Hawrylak-Nowak ◽  
Katarzyna Rubinowska ◽  
Jolanta Molas ◽  
Weronika Woch ◽  
Renata Matraszek-Gawron ◽  
...  
Keyword(s):  
Salt Stress ◽  
Stress Responses ◽  
Stress Resistance ◽  
Urban Areas ◽  
Growth Parameters ◽  
Practical Importance ◽  
Ornamental Plants ◽  
Salt Resistance ◽  
Phytotoxic Effect ◽  
Salt Stress Resistance

AbstractOrnamental plants growing in urban areas are often exposed to salt stress that negatively affects their decorative value. Enhancement of their salt resistance to retain a high decorative value despite salt stress has therefore high practical importance. In our study, the exposure of Plectranthus scutellarioides (L.) R. Br. to NaCl-induced moderate (40 mM) or severe salt stress (80 mM) resulted in a number of stress responses including reduced growth parameters, decreased concentration of photosynthetic pigments, and an increase in the accumulation of anthocyanins and free proline. These changes were partially compensated for by the application of selenium (5 µM as Na2SeO4) to the growth medium. However, the beneficial effect of selenium on the growth and physiological parameters of P. scutellarioides was manifested only at the moderate level of salt stress. Under the severe salt stress, the application of selenium was not able to alleviate the phytotoxic effect of NaCl.

scholarly journals Stress tolerance of Xerocomus badius and its promotion effect on seed germination and seedling growth of annual ryegrass under salt and drought stresses

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Binghua Liu ◽  
Xinghong Liu ◽  
Fangchun Liu ◽  
Hailin Ma ◽  
Bingyao Ma ◽  
...  
Keyword(s):  
Salt Stress ◽  
Drought Stress ◽  
Seed Germination ◽  
Seedling Growth ◽  
Mycelial Growth ◽  
Seed Priming ◽  
Stress Conditions ◽  
Mild Stress ◽  
Annual Ryegrass ◽  
Salt And Drought Stresses

AbstractComparative evaluations were conducted to assess the effects of different pH levels, NaCl-induced salt stress, and PEG-induced drought stress on the mycelial growth of Xerocomus badius. The results showed that X. badius mycelium grew well at a wide pH range of 5.00 ~ 9.00. Although the mycelium remained viable, mycelial growth of X. badius was significantly inhibited with increasing salt and drought stresses. Furthermore, a soilless experiment in Petri dishes was performed to investigate the potential of X. badius to induce beneficial effects on seed germination and seedling growth of annual ryegrass (Lolium multiflorum Lam.) under salt and drought stresses. Seed priming with X. badius enhanced the seedling growth of L. multiflorum Lam. under NaCl-induced salt stress and PEG-induced drought stress. However, X. badius did not significantly improve the seed germination under non-stress and mild stress conditions. It suggested that X. badius inoculation with seeds was not essential for seed germination under non-stress and mild stress conditions, but contributed highly to seedling growth under severe stress conditions. Therefore, seed priming with X. badius on ryegrass could be an effective approach to enhance plant tolerance against drought and salt stresses. X. badius could be a good candidate for the inoculation of ectomycorrhizal plants cultivation programs in mild saline and semiarid areas.

scholarly journals Leaf Transcriptome Analysis of Medicago Ruthenica, Revealing Its Response and Adaptive Strategy to Drought Stress and Rehydration

2020 ◽  
Author(s):  
Rina Wu ◽  
Bo Xu ◽  
Fengling Shi
Keyword(s):  
Drought Stress ◽  
Resistance Genes ◽  
Stress Resistance ◽  
Sucrose Metabolism ◽  
High Yield ◽  
Severe Drought ◽  
Proline Metabolism ◽  
Adaptation Mechanism ◽  
Medicago Ruthenica ◽  
Antenna Proteins

Abstract Background: Recently, drought stress has brought tremendous loss on the production of agriculture and animal husbandry. In realistic production, plants are often in cyclic wet-dry environment. Therefore, the factors that affect the final yield of plants in adversity including the resistance and tolerance to drought and the ability of plants to resume from the previous damage after rehydration. So it’s necessary for us to study the response and adaptive strategies of plants to drought and rehydration. Generally, the yield of herbage with strong resistance is relatively low. However, Medicago ruthenica(L.)cv.Zhilixing has the advantages of strong resistance and high yield concurrently. This made it can be used for raising livestock, natural grassland improvement, as a good parent for breeding and a new and high quality resource of stress resistance genes. Now, there are still many problems need to be solved when compared with other important legume forages. Therefore, we analyzed the changes of Medicago ruthenica(L.)cv.Zhilixing on transcription level under drought stress and rehydration, explored its phased response strategies.Results: We obtained 191 DEGs in drought stress, and the three treatments has 43 DEGs in common. Galactose metabolism, Starch and sucrose metabolism, Arginine and proline metabolism, TCA cycle, Photosynthesis-antenna proteins, were involved in the adaptation of Medicago ruthenica to 9 days of drought stress. The regulation of Arginine and proline metabolism, Cysteine and methionine metabolism, Photosynthesis-antenna proteins, Ascorbate and aldarate metabolism were conducive to the resistance of Medicago ruthenica to severe drought stress. The regulation of Starch and sucrose metabolism, Flavonoid biosynthesis, Valine, leucine and isoleucine degradation, Circadian rhythm-plant was beneficial to the post drought recovery of Medicago ruthenica.Conclusions: We preliminarily analyzed the adaptation mechanism of the plant under different drought and rehydration conditions. Medicago ruthenica(L.)cv.Zhilixing adopts different strategies to adapt to different degrees of drought stress and rehydration. The research discovered the genes that can be used as candidate genes to improve stress resistance and drought adaptability of plants. Our transcriptome data dramatically enriches the resources of stress resistance genes. It can provide theoretical support for further adaptation mechanism research of the plant under different drought and rehydration conditions.

scholarly journals Identification and Expression Profiling of Nonphosphorus Glycerolipid Synthase Genes in Response to Abiotic Stresses in Dendrobium catenatum

Plants ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 1204
Author(s):  
Xinqiao Zhan ◽  
Yichun Qian ◽  
Bizeng Mao
Keyword(s):  
Salt Stress ◽  
Drought Stress ◽  
Expression Profiling ◽  
Abiotic Stresses ◽  
Membrane Lipids ◽  
Chinese Herb ◽  
Growth Stages ◽  
Limited Information ◽  
Gene Structures ◽  
Functional Investigation

Dendrobium catenatum, a valuable Chinese herb, frequently experiences abiotic stresses, such as cold and drought, under natural conditions. Nonphosphorus glycerolipid synthase (NGLS) genes are closely linked to the homeostasis of membrane lipids under abiotic stress in plants. However, there is limited information on NGLS genes in D. catenatum. In this study, a total of eight DcaNGLS genes were identified from the D. catenatum genome; these included three monogalactosyldiacylglycerol synthase (DcaMGD1, 2, 3) genes, two digalactosyldiacylglycerol synthase (DcaDGD1, 2) genes, and three sulfoquinovosyldiacylglycerol synthase (DcaSQD1, 2.1, 2.2) genes. The gene structures and conserved motifs in the DcaNGLSs showed a high conservation during their evolution. Gene expression profiling showed that the DcaNGLSs were highly expressed in specific tissues and during rapid growth stages. Furthermore, most DcaNGLSs were strongly induced by freezing and post-freezing recovery. DcaMGD1 and DcaSQDs were greatly induced by salt stress in leaves, while DcaDGDs were primarily induced by salt stress in roots. Under drought stress, most DcaNGLSs were regulated by circadian rhythms, and DcaSQD2 was closely associated with drought recovery. Transcriptome analysis also revealed that MYB might be regulated by circadian rhythm and co-expressed with DcaNGLSs under drought stress. These results provide insight for the further functional investigation of NGLS and the regulation of nonphosphorus glycerolipid biosynthesis in Dendrobium.

scholarly journals Role of Suillus placidus in Improving the Drought Tolerance of Masson Pine (Pinus massoniana Lamb.) Seedlings

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 332
Author(s):  
Min Li ◽  
Haoyun Wang ◽  
Xizhou Zhao ◽  
Zhongke Lu ◽  
Xueguang Sun ◽  
...  
Keyword(s):  
Drought Stress ◽  
Defense Mechanism ◽  
Southern China ◽  
Dry Weight ◽  
Pinus Massoniana ◽  
Photosynthetic Performance ◽  
Ectomycorrhizal Fungus ◽  
Severe Drought ◽  
Masson Pine ◽  
Pine Seedlings

Masson pine is an important afforestation species in southern China, where seasonal drought is common. The present study focused on the effects of Suillus placidus, an ectomycorrhizal fungus, inoculation on the growth and physiological and biochemical performance of masson pine seedlings under four different watering treatments (well-watered, mild drought, moderate drought, and severe drought) to evaluate the symbiotic relationship between S. placidus and masson pine seedlings. Ectomycorrhizal-inoculated (ECM) and non-inoculated (NM) seedlings were grown in pots and maintained for 60 days using the weighing method. Results showed that seedlings’ growth, dry weight, RWC, chlorophyll content, PSII efficiency, and photosynthesis decreased as drought stress intensified in both ECM and NM plants. This suggests that drought stress significantly limits the growth and photosynthetic performance of masson pine seedlings. Nevertheless, increased An/gs and proline contents in both NM and ECM prevented oxidative damage caused by drought stress. In addition, increased peroxidase (POD) activity is an essential defense mechanism of ECM seedling under drought stress. Compared with NM, ECM seedlings showed faster growth, higher RWC, and photosynthetic performance, and lower lipid peroxidation in cell membranes under drought stress, as indicated by higher POD activity and lower proline and malondialdehyde (MDA). Our experiment found that S. placidus inoculation can enhance the drought resistance of masson pine seedlings by increasing antioxidant enzyme activity, water use efficiency, and proline content, thereby enhancing growth under water-deficiency conditions. S. placidus can be used to cultivate high-quality seedlings and improve their survival in regions that experience seasonal droughts.

scholarly journals Spermine: Its Emerging Role in Regulating Drought Stress Responses in Plants

Cells ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 261
Author(s):  
Md. Mahadi Hasan ◽  
Milan Skalicky ◽  
Mohammad Shah Jahan ◽  
Md. Nazmul Hossain ◽  
Zunaira Anwar ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Severe Drought ◽  
New Information ◽  
Effects Of Drought

In recent years, research on spermine (Spm) has turned up a lot of new information about this essential polyamine, especially as it is able to counteract damage from abiotic stresses. Spm has been shown to protect plants from a variety of environmental insults, but whether it can prevent the adverse effects of drought has not yet been reported. Drought stress increases endogenous Spm in plants and exogenous application of Spm improves the plants’ ability to tolerate drought stress. Spm’s role in enhancing antioxidant defense mechanisms, glyoxalase systems, methylglyoxal (MG) detoxification, and creating tolerance for drought-induced oxidative stress is well documented in plants. However, the influences of enzyme activity and osmoregulation on Spm biosynthesis and metabolism are variable. Spm interacts with other molecules like nitric oxide (NO) and phytohormones such as abscisic acid, salicylic acid, brassinosteroids, and ethylene, to coordinate the reactions necessary for developing drought tolerance. This review focuses on the role of Spm in plants under severe drought stress. We have proposed models to explain how Spm interacts with existing defense mechanisms in plants to improve drought tolerance.

Mapping QTLs for yield components and chlorophyll a fluorescence parameters in wheat under three levels of water availability

2011 ◽  
Vol 9 (2) ◽  
pp. 291-295 ◽  
Author(s):  
Ilona Czyczyło-Mysza ◽  
Izabela Marcińska ◽  
Edyta Skrzypek ◽  
Małgorzata Chrupek ◽  
Stanisław Grzesiak ◽  
...  
Keyword(s):  
Drought Stress ◽  
Chlorophyll A ◽  
Chlorophyll A Fluorescence ◽  
Wheat Yield ◽  
Dry Weight ◽  
Interval Mapping ◽  
Main Stem ◽  
Severe Drought ◽  
Single Marker Analysis ◽  
Fluorescence Parameters

Drought is one of the major factors limiting wheat yield in many developing countries worldwide. Parameters of chlorophyll a fluorescence kinetics under drought stress conditions have been used to characterize dehydration tolerance in wheat. In the present study, a set of 94 doubled haploid lines obtained from Chinese Spring × SQ1 (CSDH), mapped with 450 markers, was evaluated for yield (grain dry weight/main stem ear), number of grains/main stem ear (NG) and chlorophyll a fluorescence parameters (FC) under moderate and severe drought stress, and compared with results for well-watered plants. quantitative trait loci (QTLs) were identified using Windows QTLCartographer version 2.5 software and the results were analysed using single-marker analysis (SMA) and composite interval mapping (CIM). Analysis using SMA and CIM showed mostly similar QTLs for all traits, though more QTLs were identified by SMA than by CIM. The genetic control of yield, NG and FC varied considerably between drought-stressed and non-stressed plants. Although no major QTL co-locations were found for yield and FC using CIM, the co-location of QTLs for NG, yield and Fv/Fm in drought-stressed plants was observed on chromosome 5A using SMA.

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