Physiological responses of lupin roots to soil compaction

In the field, coffee is subject to the stress of soil compaction and lack of water, which may cause changes in the physiological responses of the plant. The objective of this study was to evaluate the physiological responses of the coffee tree under different soil moisture content and compaction degrees in the soil subsurface. The experimental design was in blocks, arranged in a factorial scheme, with four replications. The first factor corresponds to the two wetlands, 50 and 100% of the soil field capacity. The second factor corresponds to 60, 70, 80 and 90% of soil subsurface compaction. The experimental plot consisted of a Coffea arabica L. plant grown on a polyvinyl chloride column. The physiological responses were evaluated at 180 days of planting. The photosynthetic rate, carbon consumption, CO2 concentration in the substamatic chamber, internal carbon / atmospheric carbon ratio, water efficiency and absolute coffee growth rate were influenced by the different compaction degrees and soil moisture content. The transpiration rate and the root weight ratio were influenced only by the humidity, as opposed to the stomatal conductance and the foliar temperature, which were by degrees of compaction. The ratio of root system per soil layer was influenced by compaction degrees and soil depth. The limitation of root growth and lack of water are the main causes of the decrease in physiological responses. Subsurface compaction and water deficit together potentiate the effect negatively on the physiological responses of freshly seeded coffee plants.

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Misophonia: An Evidence-Based Case Report

American Journal of Audiology ◽

10.1044/2020_aja-19-00111 ◽

2020 ◽

Vol 29 (4) ◽

pp. 685-690

Author(s):

C. S. Vanaja ◽

Miriam Soni Abigail

Keyword(s):

Quality Of Life ◽

Case Report ◽

Case History ◽

Pure Tone ◽

Physiological Responses ◽

Evidence Based ◽

Management Option ◽

Pure Tone Audiogram

Purpose Misophonia is a sound tolerance disorder condition in certain sounds that trigger intense emotional or physiological responses. While some persons may experience misophonia, a few patients suffer from misophonia. However, there is a dearth of literature on audiological assessment and management of persons with misophonia. The purpose of this report is to discuss the assessment of misophonia and highlight the management option that helped a patient with misophonia. Method A case study of a 26-year-old woman with the complaint of decreased tolerance to specific sounds affecting quality of life is reported. Audiological assessment differentiated misophonia from hyperacusis. Management included retraining counseling as well as desensitization and habituation therapy based on the principles described by P. J. Jastreboff and Jastreboff (2014). A misophonia questionnaire was administered at regular intervals to monitor the effectiveness of therapy. Results A detailed case history and audiological evaluations including pure-tone audiogram and Johnson Hyperacusis Index revealed the presence of misophonia. The patient benefitted from intervention, and the scores of the misophonia questionnaire indicated a decrease in the severity of the problem. Conclusions It is important to differentially diagnose misophonia and hyperacusis in persons with sound tolerance disorders. Retraining counseling as well as desensitization and habituation therapy can help patients who suffer from misophonia.

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