scholarly journals The impact of drought stress on photosynthetic quantum yield in Haloxylon aphyllum and Haloxylon persicum

2013 ◽  
Vol 7 (6) ◽  
pp. 185-189
Author(s):  
Naser Arabzadeh
Keyword(s):  
Drought Stress ◽  
Quantum Yield ◽  
Haloxylon Aphyllum ◽  
Photosynthetic Quantum Yield ◽  
The Impact

The Impact of Drought Stress on some Morpho-Physiological Traits and RAPD Markers in Wheat Genotypes

2015 ◽  
Vol 4 (1) ◽  
pp. 27-37 ◽  
Author(s):  
Bayoumi Y. ◽  
Amal Abd EL-Mageed ◽  
Enas Ibrahim ◽  
Soad Mahmoud ◽  
I. El-Demardash ◽  
...  
Keyword(s):  
Drought Stress ◽  
Rapd Markers ◽  
Physiological Traits ◽  
Wheat Genotypes ◽  
The Impact

scholarly journals Improving Drought Tolerance in Mungbean (Vigna radiata L. Wilczek): Morpho-Physiological, Biochemical and Molecular Perspectives

Agronomy ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1534
Author(s):  
Chandra Mohan Singh ◽  
Poornima Singh ◽  
Chandrakant Tiwari ◽  
Shalini Purwar ◽  
Mukul Kumar ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Crop Production ◽  
Mitigation Strategies ◽  
Theoretical Research ◽  
Whole Genome Sequence ◽  
Complex Nature ◽  
Drought Tolerant ◽  
Breeding Programmes ◽  
The Impact

Drought stress is considered a severe threat to crop production. It adversely affects the morpho-physiological, biochemical and molecular functions of the plants, especially in short duration crops like mungbean. In the past few decades, significant progress has been made towards enhancing climate resilience in legumes through classical and next-generation breeding coupled with omics approaches. Various defence mechanisms have been reported as key players in crop adaptation to drought stress. Many researchers have identified potential donors, QTLs/genes and candidate genes associated to drought tolerance-related traits. However, cloning and exploitation of these loci/gene(s) in breeding programmes are still limited. To bridge the gap between theoretical research and practical breeding, we need to reveal the omics-assisted genetic variations associated with drought tolerance in mungbean to tackle this stress. Furthermore, the use of wild relatives in breeding programmes for drought tolerance is also limited and needs to be focused. Even after six years of decoding the whole genome sequence of mungbean, the genome-wide characterization and expression of various gene families and transcriptional factors are still lacking. Due to the complex nature of drought tolerance, it also requires integrating high throughput multi-omics approaches to increase breeding efficiency and genomic selection for rapid genetic gains to develop drought-tolerant mungbean cultivars. This review highlights the impact of drought stress on mungbean and mitigation strategies for breeding high-yielding drought-tolerant mungbean varieties through classical and modern omics technologies.

scholarly journals Comparing transcriptional responses to Fusarium crown rot in wheat and barley identified an important relationship between disease resistance and drought tolerance

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Z. Y. Su ◽  
J. J. Powell ◽  
S. Gao ◽  
M. Zhou ◽  
C. Liu
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Crown Rot ◽  
Differentially Expressed ◽  
Transcriptional Responses ◽  
Drought Treatment ◽  
Crop Species ◽  
Fusarium Crown Rot ◽  
Important Relationship ◽  
The Impact

Abstract Background Fusarium crown rot (FCR) is a chronic disease in cereal production worldwide. The impact of this disease is highly environmentally dependant and significant yield losses occur mainly in drought-affected crops. Results In the study reported here, we evaluated possible relationships between genes conferring FCR resistance and drought tolerance using two approaches. The first approach studied FCR induced differentially expressed genes (DEGs) targeting two barley and one wheat loci against a panel of genes curated from the literature based on known functions in drought tolerance. Of the 149 curated genes, 61.0% were responsive to FCR infection across the three loci. The second approach was a comparison of the global DEGs induced by FCR infection with the global transcriptomic responses under drought in wheat. This analysis found that approximately 48.0% of the DEGs detected one week following drought treatment and 74.4% of the DEGs detected three weeks following drought treatment were also differentially expressed between the susceptible and resistant isolines under FCR infection at one or more timepoints. As for the results from the first approach, the vast majority of common DEGs were downregulated under drought and expressed more highly in the resistant isoline than the sensitive isoline under FCR infection. Conclusions Results from this study suggest that the resistant isoline in wheat was experiencing less drought stress, which could contribute to the stronger defence response than the sensitive isoline. However, most of the genes induced by drought stress in barley were more highly expressed in the susceptible isolines than the resistant isolines under infection, indicating that genes conferring drought tolerance and FCR resistance may interact differently between these two crop species. Nevertheless, the strong relationship between FCR resistance and drought responsiveness provides further evidence indicating the possibility to enhance FCR resistance by manipulating genes conferring drought tolerance.

Drought stress increases the expression of barley defence genes with negative consequences for infesting cereal aphids

2021 ◽  
Author(s):  
Daniel Leybourne ◽  
Tracy Valentine ◽  
Kirsty Binnie ◽  
Anna Taylor ◽  
Alison Jane Karley ◽  
...  
Keyword(s):  
Drought Stress ◽  
Aphid Species ◽  
Susceptible Variety ◽  
Aphid Resistance ◽  
Herbivorous Insects ◽  
Cereal Aphids ◽  
Negative Consequences ◽  
Resistant Plant ◽  
Negative Effect ◽  
The Impact

Crops are exposed to myriad abiotic and biotic stressors with negative consequences. Two stressors that are expected to increase under climate change are drought and infestation with herbivorous insects, including important aphid species. Expanding our understanding of the impact drought has on the plant-aphid relationship will become increasingly important under future climate scenarios. Here we use a previously characterised plant-aphid system comprising a susceptible variety of barley, a wild relative of barley with partial-aphid resistance, and the bird cherry-oat aphid to examine the drought-plant-aphid relationship. We show that drought has a negative effect on plant physiology and aphid fitness and provide evidence to suggest that plant resistance influences aphid responses to drought stress, with the expression of aphid detoxification genes increasing under drought when feeding on the susceptible plant but decreasing on the partially-resistant plant. Furthermore, we show that the expression of thionin genes, plant defensive compounds that contribute aphid resistance, increase ten-fold in susceptible plants exposed to drought stress but remain at constant levels in the partially-resistant plant, suggesting they play an important role in modulating aphid populations. This study highlights the role of plant defensive processes in mediating the interactions between the environment, plants, and herbivorous insects.

The Impact of Drought Stress on the Quality of Spice and Medicinal Plants

2017 ◽  
pp. 159-175 ◽  
Author(s):  
Dirk Selmar ◽  
Maik Kleinwächter ◽  
Sara Abouzeid ◽  
Mahdi Yahyazadeh ◽  
Melanie Nowak
Keyword(s):  
Drought Stress ◽  
Medicinal Plants ◽  
The Impact

Impact of Drought Stress on Forest Trees – A Review

2019 ◽  
Vol 42 (2) ◽  
pp. 185-190
Author(s):  
Shephali Sachan ◽  
◽  
Avinash Jain ◽  
Keyword(s):  
Drought Stress ◽  
Water Resources ◽  
Tree Species ◽  
Forest Trees ◽  
Physiological Processes ◽  
Dangerous Situation ◽  
Time Period ◽  
Capacity Level ◽  
Abrupt Changes ◽  
The Impact

Drought stress is creating dangerous situation worldwide. The impact of stress is not only the deficiency of water but it also leads to the deficiency and losses of everything which are linked to the water resources directly or indirectly. Drought stress disturbs the normal biochemical, molecular and physiological processes, affecting the morphology of plant. As a result the plant is either unable to live on abrupt changes or learn to avoid/tolerate the variation in the environment. The results vary species to species depending on genotype, frequency and time period of drought stress. There is need of screening various tree species for getting information related to their ability and capacity level of susceptibility, tolerance and avoidance behaviour with the further goal of their plantation in the various nurseries in order to rehabilitate the drought prone areas, wastelands and to increase intangible and tangible benefits.

scholarly journals The physiology of drought stress in grapevine: towards an integrative definition of drought tolerance

2020 ◽  
Vol 71 (16) ◽  
pp. 4658-4676 ◽  
Author(s):  
Gregory A Gambetta ◽  
Jose Carlos Herrera ◽  
Silvina Dayer ◽  
Quishuo Feng ◽  
Uri Hochberg ◽  
...  
Keyword(s):  
Climate Change ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Water Availability ◽  
Economic Importance ◽  
Fruit Crop ◽  
Crop Varieties ◽  
Drought Tolerant ◽  
Definition Of ◽  
The Impact

Abstract Water availability is arguably the most important environmental factor limiting crop growth and productivity. Erratic precipitation patterns and increased temperatures resulting from climate change will likely make drought events more frequent in many regions, increasing the demand on freshwater resources and creating major challenges for agriculture. Addressing these challenges through increased irrigation is not always a sustainable solution so there is a growing need to identify and/or breed drought-tolerant crop varieties in order to maintain sustainability in the context of climate change. Grapevine (Vitis vinifera), a major fruit crop of economic importance, has emerged as a model perennial fruit crop for the study of drought tolerance. This review synthesizes the most recent results on grapevine drought responses, the impact of water deficit on fruit yield and composition, and the identification of drought-tolerant varieties. Given the existing gaps in our knowledge of the mechanisms underlying grapevine drought responses, we aim to answer the following question: how can we move towards a more integrative definition of grapevine drought tolerance?

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