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Physiology of medicinal and aromatic plants under drought stress

The Crop Journal 2024年第2期12卷 330-339页

作者： zohreh emami bistgani Allen V.Barker Masoud Hashemi Isfahan Agricultural and Natural Resources Research and Education Center Agricultural Research Education and Extension Organization(AREEO)Isfahan 81748-35117Iran Stockbridge School of Agriculture University of MassachusettsAmherstMA 01002USA

Drought poses a significant challenge,restricting the productivity of medicinal and aromatic *** strain induced by drought can impede vital processes like respiration and photosynthesis,affecting various aspects of plants’growth and *** response to this adversity,medicinal plants employ mechanisms such as morphological and structural adjustments,modulation of drought-resistant genes,and augmented synthesis of secondary metabolites and osmotic regulatory substances to alleviate the *** water scarcity can lead to leaf wilting and may ultimately result in plant *** cultivation and management of medicinal plants under stress conditions often differ from those of other *** is because the main goal with medicinal plants is not only to increase the yield of the above-ground parts but also to enhance the production of active ingredients such as essential *** elucidate these mechanisms of drought resistance in medicinal and aromatic plants,the current review provides a summary of recent literature encompassing studies on the morphology,physiology,and biochemistry of medicinal and aromatic plants under drought conditions.

关键词： Drought stress Medicinal and aromatic plants Phytochemistry Physiology

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Physiology of medicinal and aromatic plants under drought stress

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The Crop Journal 2024年第2期 330页

作者： zohreh emami bistgani Allen V.Barker Masoud Hashemi

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Interactive effects of drought stress and chitosan application on physiological characteristics and essential oil yield of Thymus daenensis Celak

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The Crop Journal 2017年第5期5卷 407-415页

作者： zohreh emami bistgani Seyed Ataollah Siadat Abdolmehdi Bakhshandeh Abdollah Ghasemi Pirbalouti Masoud Hashemi Ramin Agriculture and Natural Resources University of Khozestan Department of Medicinal Plants Shahrekord Branch Islamic Azad University Stockbridge School of Agriculture University of Massachusetts Amherst Amherst

Thymus daenensis, a perennial herb, is often grown in areas that experience drought conditions during its growing period. Application of chitosan may compensate for the negative impact of drought stress on the yield of oil and secondary metabolites in *** interactive effects of foliar application of chitosan and drought stress on dry matter,essential oil yield, and selected physiological characteristics including photosynthetic pigments, osmotic adjustment, and lipid peroxidation of Thymus were investigated in a two-year study from 2014 to 2015. Treatments consisted of 0, 200, and 400(iL L'1 chitosan applied to plants grown under field capacity, mild drought stress(50% field capacity), and severe drought stress(25% field capacity). Dry matter yield decreased substantially as drought stress intensified. However, essential oil content increased under stress conditions,with the highest essential oil yield obtained from plants under mild drought stress. Foliar application of chitosan compensated to some extent for dry matter and oil yield reduction of plants grown under drought stress. The highest essential oil yield(1.52 g plant-1) was obtained by application of 400 \iL L_1 chitosan under the mild stress condition in 2015 when plants were mature. The compensatory effect of chitosan in reducing the negative impact of stress conditions on dry matter and oil yield was due mainly to stimulation of osmotic adjustment through proline accumulation and reduction of lipid peroxidase level, which increased the integrity of cell membranes of thyme leaves.

关键词： Thymus daenensis Chitosan Drought stress Essential oil yield Osmotic adjustment

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Long COVID in children and adolescents

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World Journal of Pediatrics 2021年第5期17卷 495-499页

作者： Ali A.Asadi-Pooya Hamid Nemati Mina Shahisavandi Ali Akbari Amir emami Mehrzad Lotfi Mahtab Rostamihosseinkhani zohreh Barzegar Maryam Kabiri Zahra Zeraatpisheh Mohsen Farjoud-Kouhanjani Anahita Jafari Fateme Sasannia Shayan Ashrafi Masoume Nazeri Sara Nasiri Epilepsy Research Center Shiraz University of Medical SciencesShirazIran Department of Ncurology Jefferson Comprehensive Epilepsy CenterThomas Jefferson UniversityPhiladelphiaPAUSA Department of Anesthesiology School of Medicine.Shiraz University of Medical SciencesShirazIran Burn&Wound Healing Research Center Shiraz University of Medical SciencesShirazIran Medical Imaging Research Center Shiraz University of Medical SciencesShirazIran

Background To identify the prevalence and also the full spectrum of symptoms/complaints of children and adolescents who are suffering from long ***,we investigated the risk factors of long COVID in children and *** All consecutive children and adolescents who were referred to the hospitals anywhere in Fars province,Iran,from 19 February 2020 until 20 November 2020 were *** patients had a confirmed diagnosis of *** *** call to patients/parents,at least 3 months after their discharge from the hospital,we obtained their current status and information if their parents agreed to *** In total,58 children and adolescents fulillel the inclusion ***-six(448%)children/adolescents reported symptoms/complaints of long *** symptoms included fatigue in 12(21%),shortness of breath in 7(12%),exer-cise intolerance in 7(12%),weakness in 6(10%),and walking intolerance in 5(9%)*** age,muscle pain on admission,and intensive care unit admission were significantly associated with long *** Long COVID is a frequent condition in children and *** scientific community should inves-tigate and explore the pathophysiology of long COVID to ensure that these patients receive appropriate treatments for their condition.

关键词： Adolescents Children COVID-19 Coronavirus Chronic Pediatrics

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