Involvement of dehydrin proteins in mitigating the negative effects of drought stress in plants

2021 ◽  
Author(s):  
Riyazuddin Riyazuddin ◽  
Nisha Nisha ◽  
Kalpita Singh ◽  
Radhika Verma ◽  
Ravi Gupta
Keyword(s):  
Drought Stress ◽  
Negative Effects ◽  
Effects Of Drought

Penconazole and calcium ameliorate drought stress in canola by upregulating the antioxidative enzymes

2020 ◽  
Vol 47 (9) ◽  
pp. 825 ◽  
Author(s):  
Maryam Rezayian ◽  
Vahid Niknam ◽  
Hassan Ebrahimzadeh
Keyword(s):  
Oxidative Stress ◽  
Lipid Peroxidation ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Antioxidative Enzymes ◽  
Proline Content ◽  
Fresh Weight ◽  
Negative Effects ◽  
Mda Content ◽  
Effects Of Drought

The aim of this research was to gauge the alternations in the lipid peroxidation and antioxidative enzyme activity in two cultivars (cv. RGS003 and cv. Sarigol) of canola under drought stress and drought tolerance amelioration by penconazole (PEN) and calcium (Ca). Plants were treated with different polyethylene glycol (PEG) concentrations (0, 5, 10 and 15%) without or with PEN (15 mg L–1) and Ca (15 mM). The Ca treatment prevented the negative effects of drought on fresh weight (FW) in RGS003 and Sarigol at 5 and 15% PEG respectively. Ca and PEN/Ca treatments caused significant induction in the proline content in Sarigol at 15% PEG; the latter treatment was accompanied by higher glycine betaine (GB), lower malondialdehyde (MDA) and growth recovery. Hydrogen peroxide (HO2) content in Sarigol was proportional to the severity of drought stress and all PEN, Ca and PEN/Ca treatments significantly reduced the H2O2 content. PEN and PEN/Ca caused alleviation of the drought-induced oxidative stress in RGS003. RGS003 cultivar exhibited significantly higher antioxidative enzymes activity at most levels of drought, which could lead to its drought tolerance and lower MDA content. In contrast to that of Sarigol, the activity of catalase and superoxide dismutase (SOD) increased with Ca and PEN/Ca treatments in RGS003 under low stress. The application of PEN and Ca induced significantly P5CS and SOD expression in RGS003 under drought stress after 24 h. Overall, these data demonstrated that PEN and Ca have the ability to enhance the tolerance against the drought stress in canola plants.

scholarly journals Elevated CO2 Alleviates the Effects of Drought on Wheat - Aphid Interaction

2021 ◽  
Author(s):  
Haicui Xie ◽  
Fengyu Shi ◽  
Jingshi Li ◽  
miaomai Yu ◽  
Jia Fan ◽  
...  
Keyword(s):  
Drought Stress ◽  
Nutritional Quality ◽  
Soluble Sugar ◽  
Amino Acid Content ◽  
Sugar Accumulation ◽  
Negative Effects ◽  
Effects Of Drought ◽  
Insect Interactions ◽  
Positive Effect ◽  
Aphid Populations

Abstract Due to rising concentration of atmospheric CO2, climate change is predicted to intensify episodes of drought, however, our understanding of how combined environmental conditions will influence crop-insect interactions is limited. The direct effects of elevated CO2 and drought stress on wheat (Triticum aestivum L.) nutritional quality, insect resistance and their indirect effects on the grain aphid (Sitobion avenae) performance are reported here. Elevated CO2 was able to alleviate low water content in wheat caused by drought stress. Both elevated CO2 and drought promoted soluble sugar accumulation in wheat. However, elevated CO2 decreased and drought increased the amino acid content in wheat. Elevated CO2 induced the down-regulation of jasmonic acid (JA) -dependent defense, but up-regulated the salicylic acid-dependent defense. Drought enhanced abscisic acid accumulation that promoted the JA-dependent defense in wheat. Aphid-induced phytohormone resistance in wheat was not influenced by elevated CO2 and drought. The negative effects of drought on the performance of the aphid population was offset by positive effect of elevated CO2. In conclusion, elevated CO2 can alleviate the effects of drought stress on wheat nutritional quality and resistance, which results in unchanged damage to wheat from aphid populations under future elevated CO2 and drier conditions.

Grain yield response of drought stressed wheat to foliar application of glycine betaine

2017 ◽  
Vol 51 (03) ◽  
Author(s):  
Neha Gupta ◽  
Sanjeev Kaur Thind
Keyword(s):  
Drought Stress ◽  
Glycine Betaine ◽  
Foliar Application ◽  
Stress Sensitivity ◽  
Yield Response ◽  
Specific Response ◽  
Optimum Level ◽  
Negative Effects ◽  
Wheat Genotypes ◽  
Effects Of Drought

A field experiment was conducted to investigate influence of exogenous application of glycine betaine (GB) on performance of wheat under prolonged drought conditions. A set of 19 wheat genotypes differing in stress sensitivity, were sprayed with 100mM GB at maximum tillering and anthesis stage. GB treatment significantly declined the phenological pace under drought stress by increasing days to anthesis. Foliar applied GB improved grains/ spike and thousand grain weight of selected wheat genotypes over stressed ones. The genotype specific response to GB application suggested some threshold optimum level to be necessary for yield improvement under drought stress in susceptible genotypes as compared with tolerant ones. In overall, GB alleviated negative effects of drought stress by a rise in harvest index of most genotypes suggesting its role in assimilate translocation.

Glycinebetaine application ameliorates negative effects of drought stress in tobacco

2007 ◽  
Vol 54 (4) ◽  
pp. 472-479 ◽  
Author(s):  
X. L. Ma ◽  
Y. J. Wang ◽  
S. L. Xie ◽  
C. Wang ◽  
W. Wang
Keyword(s):  
Drought Stress ◽  
Negative Effects ◽  
Effects Of Drought

Mammalian androgen stimulates photosynthesis in drought-stressed soybean

2012 ◽  
Vol 7 (5) ◽  
pp. 902-909 ◽  
Author(s):  
Anna Janeczko ◽  
Maciej Kocurek ◽  
Izabela Marcińska
Keyword(s):  
Drought Stress ◽  
Photosystem Ii ◽  
Physiological Activity ◽  
Net Photosynthesis ◽  
Membrane Stability ◽  
Gaseous Exchange ◽  
Negative Effects ◽  
Action Effect ◽  
Soybean Seedlings ◽  
Effects Of Drought

AbstractThe aim of the present studies was to assess the possibility of compensating the negative effects of drought stress on gaseous exchange and efficiency of photosystem II in soybean seedlings by application of the androgen — androstenedione. Androstenedione (0.25 mg dm−3) was applied via presowing seed soaking (12 h). Control seeds were untreated with steroid. Plants were cultured in pots. On the 12th day of growth, the plants were watered for the last time. Drought symptoms occurred during the next 10 days. On the 22nd day of growth, leaf gaseous exchange and PSII measurements were taken. Afterwards the plants were watered. Two days later measurements were taken again. Androstenedione improved the intensity of leaf net photosynthesis. The effect of androstenedione was manifested during the rehydration of plants that have undergone a period of drought. An increase in net photosynthesis intensity was accompanied by higher transpiration. Possible mechanisms of androstenedione action — effect on aquaporin functionality and membrane stability — are discussed. The significance of ethanol and DMSO (solvents of steroid) in experiments on the physiological activity of androstenedione is also considered.

scholarly journals Response of Mediterranean Ornamental Plants to Drought Stress

Horticulturae ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 6 ◽  
Author(s):  
Stefania Toscano ◽  
Antonio Ferrante ◽  
Daniela Romano
Keyword(s):  
Drought Stress ◽  
Ornamental Plants ◽  
Leaf Size ◽  
Mediterranean Area ◽  
Negative Effects ◽  
Aesthetic Value ◽  
Root Shoot Ratio ◽  
Adaptive Mechanisms ◽  
Effects Of Drought ◽  
Physiological And Biochemical

Ornamental plants use unique adaptive mechanisms to overcome the negative effects of drought stress. A large number of species grown in the Mediterranean area offer the opportunity to select some for ornamental purposes with the ability to adapt to drought conditions. The plants tolerant to drought stress show different adaptation mechanisms to overcome drought stress, including morphological, physiological, and biochemical modifications. These responses include increasing root/shoot ratio, growth reduction, leaf anatomy change, and reduction of leaf size and total leaf area to limit water loss and guarantee photosynthesis. In this review, the effect of drought stress on photosynthesis and chlorophyll a fluorescence is discussed. Recent information on the mechanisms of signal transduction and the development of drought tolerance in ornamental plants is provided. Finally, drought-induced oxidative stress is analyzed and discussed. The purpose of this review is to deepen our knowledge of how drought may modify the morphological and physiological characteristics of plants and reduce their aesthetic value—that is, the key parameter of assessment of ornamental plants.

Influence of Rhizobium, Pseudomonas and Mycorrhiza on Some Physiological Traits of Red Beans (Phaseolus vulgaris L.) under different irrigation conditions

2019 ◽  
Author(s):  
Ebrahim Abbasi Seyahjani ◽  
Mehrdad Yarnia ◽  
Farhad Farahvash ◽  
Mohammad Bagher Khorshidi Benam ◽  
Hadi Asadi Rahmani
Keyword(s):  
Drought Stress ◽  
Grain Yield ◽  
Phaseolus Vulgaris L ◽  
Negative Effects ◽  
Irrigation Level ◽  
Effects Of Drought ◽  
Red Bean ◽  
Irrigation Levels ◽  
Plot Experiment ◽  
Cell Leakage

This study was conducted to evaluate response red bean (CV. Goli) under drought stress conditions for three types of biological fertilizers in 2014 - 2015 years. A split plot experiment was conducted in Tabriz, Iran. Irrigation levels (irrigation after 70, 110, and 150 mm of evaporation from pan) were considered as main plots, and biological fertilizers Rhizobium (Rp), Mycorrhiza (My), Pseudomonas (Ps), Rp + My, Rp + Ps, Rp + My + Ps, and non-inoculation (control) were considered as sub plots. Combination of Rhizobium, Mycorrhiza, and Pseudomonas at irrigation level of more than 70 mm of evaporation had the highest grain yield, RWC, CCI, stomata conductance, leaf water potential and lowest cell leakage. Triple inoculation increased grain yield in comparison to the control, or to the time they were used individually or simultaneously; it also reduced the negative effects of drought stress on the beans.

scholarly journals Drought delays development of the sorghum root microbiome and enriches for monoderm bacteria

2018 ◽  
Vol 115 (18) ◽  
pp. E4284-E4293 ◽  
Author(s):  
Ling Xu ◽  
Dan Naylor ◽  
Zhaobin Dong ◽  
Tuesday Simmons ◽  
Grady Pierroz ◽  
...  
Keyword(s):  
Drought Stress ◽  
Plant Growth ◽  
Crop Productivity ◽  
Outer Cell ◽  
Negative Effects ◽  
Temporal Sampling ◽  
Effects Of Drought ◽  
Abc Transporter Genes ◽  
Increased Activity ◽  
Root Microbiome

Drought stress is a major obstacle to crop productivity, and the severity and frequency of drought are expected to increase in the coming century. Certain root-associated bacteria have been shown to mitigate the negative effects of drought stress on plant growth, and manipulation of the crop microbiome is an emerging strategy for overcoming drought stress in agricultural systems, yet the effect of drought on the development of the root microbiome is poorly understood. Through 16S rRNA amplicon and metatranscriptome sequencing, as well as root metabolomics, we demonstrate that drought delays the development of the early sorghum root microbiome and causes increased abundance and activity of monoderm bacteria, which lack an outer cell membrane and contain thick cell walls. Our data suggest that altered plant metabolism and increased activity of bacterial ATP-binding cassette (ABC) transporter genes are correlated with these shifts in community composition. Finally, inoculation experiments with monoderm isolates indicate that increased colonization of the root during drought can positively impact plant growth. Collectively, these results demonstrate the role that drought plays in restructuring the root microbiome and highlight the importance of temporal sampling when studying plant-associated microbiomes.

Sign in / Sign up

Export Citation Format

Share Document