Noura Masseh Ellya Kka; Kharman Khalid Qader; Sherwan Jalil Ahmed; Arshad Abdulkhalq Yaseen
Volume 25, Issue 1 , March 2025, , Pages 178-192
Abstract
As agriculture in Iraq faces the challenges of climate change, particularly given the preference for consuming local vegetables, determining the drought tolerance of indigenous varieties and developing strategies to mitigate its impact have become a top research priority. The aim of this study was to ...
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As agriculture in Iraq faces the challenges of climate change, particularly given the preference for consuming local vegetables, determining the drought tolerance of indigenous varieties and developing strategies to mitigate its impact have become a top research priority. The aim of this study was to mitigate the impact of water potential during the germination stage of a local variety of onion (Allium cepa L. var. local white) that is cultivated and consumed widely in the Kurdistan region of Iraq. Ascorbic acid (Asc) with two concentrations (1.5 and 2.5 mM) as a priming compound and polyethylene glycol 8000 (PEG8000) with concentrations (50 and 100 g/L) as a water potential inducer were implemented for different durations (12 and 24 h). Onion seed germination and growth characteristics were recorded. Germination energy at four days (GE4) and germination capacity (GC) were improved when seeds were treated with 1.5 mM Asc for 12 hours. The highest germination rate index (GRI) of 9% and the shortest mean germination time (MGT) were recorded when seeds were treated with 3 mM Asc, while direct sowing had the lowest GRI of 6.5%. The values of radicle and hypocotyl growth were recorded the highest when seeds were primed with 1.5 mM Asc for 12h and exposed to 50 g/L PEG8000. These results indicate the important role of Asc priming under moderate water potential in improving onion seedling growth and resilience. We recommend that farmers in Kurdistan and Iraq adopt Asc priming techniques to enhance drought resistance in onion crops. Future research should focus on optimising Asc concentrations and exploring additional stress-mitigation strategies for other key crops in the region.
Safaa M. Bilal; Ayad C. Khorsheed
Volume 23, Issue 3 , September 2023, , Pages 94-102
Abstract
The current study was included the separation and identification of many volatile oil compounds from the seeds and peels of the fruit of Iraqi Citrullus colocynthis (L.) Schrad Plant , by using Clevenger apparatus for light compounds and the results were confirmed by using GLC technique The volatile ...
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The current study was included the separation and identification of many volatile oil compounds from the seeds and peels of the fruit of Iraqi Citrullus colocynthis (L.) Schrad Plant , by using Clevenger apparatus for light compounds and the results were confirmed by using GLC technique The volatile compounds were identified which included the following : (α-pinene, Limonene, Camphene, Carvacrol, Camphor, P-cymene, Terpinene, Linalool, Menthol, Sabinen and phellanodrene), Terpinene was the highest compound concentration in the seeds and peels (12.14,16.58)% respectively , whereas the lowest concentration in the seeds and peels was Menthol (0.08,0.14) % respectively. The study was also included studying the antioxidant effect of volatile oil separated from the seeds and peels at different concetrations and compared them with the ascorbic acid as a control sample, it was observed that the separated volatile oils from the peels were significantly superior of the free radical inhibition of DPPH (76.1,76.8) % at a concentration (300, 400) Mg.ml–1 respectively compared to the separated volatile oils from seeds
Safaa Bilal; Ayad Khorsheed
Volume 23, Issue 2 , June 2023, , Pages 235-245
Abstract
A current study was included the separation and diagnosis of a number of volatile oils components from the seeds and the peels of a fruit from the Iraqi Citrullus colocynthis ( L. ) Schrad Plant , by using Clevenger apparatus for light compounds and the results were confirmed ...
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A current study was included the separation and diagnosis of a number of volatile oils components from the seeds and the peels of a fruit from the Iraqi Citrullus colocynthis ( L. ) Schrad Plant , by using Clevenger apparatus for light compounds and the results were confirmed by using GLC technique .The volatile compounds were identified which included the following : (α-pinene, Limonene, Camphene, Carvacrol, Camphor, Pcymene, Terpinene, Linalool, Menthol, Sabinen and phellanodrene). Terpinene was the highest compound concentration in the seeds and peels %(12.14,16.58) respectively , whereas the lowest concentration in the seeds and peels was Menthol (0.08,0.14) % respectively. The study was also included studying the antioxidant effect of volatile oil separated from the seeds and peels at different concentrations and compared them with the ascorbic acid as a control sample, it was observed that the separated volatile oils from the peels were significantly superior of the free radical inhibition of DPPH (76.1,76.8) % at a concentration (300, 400) Mg.ml–1 respectively compared to the separated volatile oils from seeds.
