Long-term plasticity in growth, storage and defense allocation produces drought-tolerant juvenile shrubs of Prosopis alpataco R.A. Philippi (Fabaceae)

Flora ◽  
2012 ◽  
Vol 207 (6) ◽  
pp. 436-441 ◽  
Author(s):  
Alejandra E. Vilela ◽  
Paola R. Agüero ◽  
Damián A. Ravetta ◽  
Luciana González-Paleo
Keyword(s):  
Drought Tolerant ◽  
Prosopis Alpataco ◽  
Defense Allocation

scholarly journals Transcriptome Response to Drought, Rehydration and Re-Dehydration in Potato

2019 ◽  
Vol 21 (1) ◽  
pp. 159 ◽  
Author(s):  
Yongkun Chen ◽  
Canhui Li ◽  
Jing Yi ◽  
Yu Yang ◽  
Chunxia Lei ◽  
...  
Keyword(s):  
Signal Transduction ◽  
Gene Regulation ◽  
Lipid Metabolism ◽  
Drought Stress ◽  
Sugar Metabolism ◽  
Rna Seq ◽  
Drought Tolerant ◽  
Cell Components ◽  
Drought Hardening

Potato is an important food crop and its production is susceptible to drought. Drought stress in crop growth is usually multiple- or long-term. In this study, the drought tolerant potato landrace Jancko Sisu Yari was treated with drought stress, rehydration and re-dehydration, and RNA-seq was applied to analyze the characteristics of gene regulation during these treatments. The results showed that drought-responsive genes mainly involved photosynthesis, signal transduction, lipid metabolism, sugar metabolism, wax synthesis, cell wall regulation, osmotic adjustment. Potato also can be recovered well in the re-emergence of water through gene regulation. The recovery of rehydration mainly related to patatin, lipid metabolism, sugar metabolism, flavonoids metabolism and detoxification besides the reverse expression of the most of drought-responsive genes. The previous drought stress can produce a positive responsive ability to the subsequent drought by drought hardening. Drought hardening was not only reflected in the drought-responsive genes related to the modified structure and cell components, but also in the hardening of gene expression or the “memory” of drought-responsive genes. Abundant genes involved photosynthesis, signal transduction, sugar metabolism, protease and protease inhibitors, flavonoids metabolism, transporters and transcription factors were subject to drought hardening or memorized drought in potato.

scholarly journals Conservation agriculture and drought-tolerant germplasm: Reaping the benefits of climate-smart agriculture technologies in central Mozambique

2015 ◽  
Vol 31 (5) ◽  
pp. 414-428 ◽  
Author(s):  
Christian Thierfelder ◽  
Leonard Rusinamhodzi ◽  
Peter Setimela ◽  
Forbes Walker ◽  
Neal S. Eash
Keyword(s):  
Cropping Systems ◽  
Direct Interaction ◽  
Conservation Agriculture ◽  
Conventional Tillage ◽  
Soil Disturbance ◽  
Drought Tolerant ◽  
Maize Varieties ◽  
Tillage Treatment ◽  
Smart Agriculture

AbstractConservation agriculture (CA) based on minimum soil disturbance, crop residue retention and crop rotations is considered as a soil and crop management system that could potentially increase soil quality and mitigate the negative effects of climate variability. When CA is combined with drought-tolerant (DT) maize varieties, farmers can reap the benefits of both—genetic improvement and sustainable land management. New initiatives were started in 2007 in Mozambique to test the two climate-smart agriculture technologies on farmers' fields. Long-term trends showed that direct seeded manual CA treatments outyielded conventional tillage treatments in up to 89% of cases on maize and in 90% of cases on legume in direct yield comparisons. Improved DT maize varieties outyielded the traditional control variety by 26–46% (695–1422 kg ha−1) on different tillage treatment, across sites and season. However a direct interaction between tillage treatment and variety performance could not be established. Maize and legume grain yields on CA plots in this long-term dataset did not increase with increased years of practice due to on-site variability between farmer replicates. It was evident from the farmers' choice that, beside taste and good milling quality, farmers in drought-prone environments considered the potential of a variety to mature faster more important than larger potential yields of long season varieties. Population growth, labor shortage to clear new land areas and limited land resources in future will force farmers to change toward more permanent and sustainable cropping systems and CA is a viable option to improve their food security and livelihoods.

scholarly journals Peasant Associations and Implementation of Climate Change Adaptation Practices in the Northern and Brong-Ahafo Regions of Ghana

2019 ◽  
pp. 1-6
Author(s):  
Samuel Weniga Anuga ◽  
Ernst Mill ◽  
Wuni Mbanya
Keyword(s):  
Climate Change ◽  
Climate Change Adaptation ◽  
Poverty Alleviation ◽  
Residue Management ◽  
Governmental Organizations ◽  
Drought Tolerant ◽  
Non Governmental Organizations ◽  
Adaptation Practices

Peasant association plays a central role in climate change adaptation. Farmer-based associations serve as a conduit for the implementation of climate change adaptation practices by contributing to knowledge sharing and assimilation. In Ghana, the role of peasant associations in climate change adaptation is unnoticed. Employing a mixed research approaches the procurement of data, this study gives a deeper understanding of peasant associations and their activities of two regions in the country. It also examines the contributions of peasant associations to climate change adaptation. It was established that peasant associations promoted understanding and implementation of climate change adaptation strategies including preparation and application of compost, residue management, row/distance planting, use of drought tolerant seeds, afforestation and crop rotation which benefited farmers in getting more yield and by extension being able to reinvest in their farms and venture into other livelihood strategies. The study concluded that Non- Governmental Organizations interested in climate change adaptation should target and build the capacity of farmer peasant groups for appropriate climate change adaptation and achievement of poverty alleviation and long-term food security.

scholarly journals Recent Advances of Biotechnological Tools on Diverse Species of Citrus: Current Applications and Future Prospects

2021 ◽  
pp. 242-265
Author(s):  
Priyanka Sharma ◽  
Bidhan Roy ◽  
Monish Roy
Keyword(s):  
Cost Effective ◽  
Nodal Segments ◽  
Synthetic Seed ◽  
Indigenous Species ◽  
Drought Tolerant ◽  
Diverse Species ◽  
In Vitro Micropropagation ◽  
Cryopreservation Techniques

Based on the long term conservation of several endangered and indigenous species of Citrus, significant impact of biotechnological tools particularly in terms of in-vitro micropropagation methods in addition to synthetic seed production using encapsulation of plant propagules including shoot tips, nodal segments, androgenic embryos, embryogenic callus, etc. in sodium alginate has been highlighted in this manuscript. When seed is not available in enough quantity for raising seedlings for rootstock or have low levels of polyembryony and do not produce adequate quantities of nucellar seedlings, then micropropagation techniques could quickly supply in vitro regenerated rootstock or budwood. Rapid, mass-production and cost-effective biotechnological tools for propagation of citrus rootstocks and budwood would be of great importance in this regard. Reports on another aspect of long term conservation particularly based on storage of cells, tissues and organs of drought tolerant species of Citrus at ultra-low temperature preferably at -196 ºC via applications of cryopreservation techniques using vitrification and encapsulation or dehydration methods has been highlighted in this manuscript. In addition, several research on techniques of in-vitro micrografting using superior scion and rootstocks of two different species of Citrus with an objective of eradication of virus infected citrus stocks for successful production of grafts have been reviewed. Furthermore, effects of explants either through direct and indirect regeneration and conversion into a complete disease free plantlet using suitable synthetic nutrient media along with plant growth regulators at various concentrations and combinations have been highlighted in this manuscript. Hence, the current review is primarily focused on the applications and its effects of superior biotechnological tools for long term conservation of diverse species of citrus for further increasing the potentiality of Citrus industries in addition to genetic improvement and genetic resource conservation.

Water Stress and Grape Physiology in the Context of Global Climate Change

2016 ◽  
Vol 11 (1) ◽  
pp. 168-180 ◽  
Author(s):  
Gregory A. Gambetta
Keyword(s):  
Climate Change ◽  
Water Stress ◽  
Global Climate Change ◽  
Water Availability ◽  
Global Climate ◽  
Plant Water ◽  
Crop Water ◽  
Drought Tolerant ◽  
Jel Classifications

AbstractPlant adaptation to global climate change has become one of the most pressing and important topics in biology. Changes in climate that lead to increased crop water use or decreases in water availability will increase the frequency and magnitude of plant water stress. Water stress reduces plant growth and crop yield, and for perennial crops like grape, there is an added consideration: their long-term ability to tolerate and recover from this stress. This primer introduces plant water relations basics, explaining how grape physiology is affected by water stress and discussing the physiological foundations for the development of drought-tolerant cultivars and rootstocks. (JEL Classifications: Q13, Q54)

Therapy and prevention for mental health: What if mental diseases are mostly not brain disorders?

2019 ◽  
Vol 42 ◽  
Author(s):  
John P. A. Ioannidis
Keyword(s):  
Mental Health ◽  
Mental Disease ◽  
Brain Disorders ◽  
Social Stressors ◽  
Labor Education ◽  
Mental Diseases ◽  
Long Term Follow Up ◽  
Political Decisions

AbstractNeurobiology-based interventions for mental diseases and searches for useful biomarkers of treatment response have largely failed. Clinical trials should assess interventions related to environmental and social stressors, with long-term follow-up; social rather than biological endpoints; personalized outcomes; and suitable cluster, adaptive, and n-of-1 designs. Labor, education, financial, and other social/political decisions should be evaluated for their impacts on mental disease.

Conceptual short-term memory (CSTM) supports core claims of Christiansen and Chater

2016 ◽  
Vol 39 ◽  
Author(s):  
Mary C. Potter
Keyword(s):  
Working Memory ◽  
Rapid Serial Visual Presentation ◽  
Language Comprehension ◽  
Short Term Memory ◽  
Visual Presentation ◽  
Long Term Memory ◽  
Short Term ◽  
Term Memory ◽  
Use Of Knowledge

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.

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