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257 results on '"KHALID, Noreen"'

13. Mitigating chromium toxicity in rice (Oryza sativa L.) via ABA and 6-BAP: Unveiling synergistic benefits on morphophysiological traits and ASA-GSH cycle

Author

Alwutayd, Khairiah Mubarak, Alghanem, Suliman Mohammed Suliman, Alwutayd, Rahaf, Alghamdi, Sameera A., Alabdallah, Nadiyah M., Al-Qthanin, Rahmah N., Sarfraz, Wajiha, Khalid, Noreen, Naeem, Nayab, Ali, Baber, Saleem, Muhammad Hamzah, Javed, Sadia, Gómez-Oliván, Leobardo Manuel, and Abeed, Amany H.A.

Published
2024
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29. Biostimulant-mediated cellular repair by improving antioxidant dynamics and osmoregulation against metal stress in canola.

Author

KANWAL, Hina, SHOAIB, Iram, NOMAN, Ali, MAQSOOD, Muhammad Faisal, NAHEED, Rashda, ALZOUBI, Omar Mahmoud, HASHEM, Mohamed, ELNOUR, Rehab, ALZUAIBR, Fahad Mohammed, KHALID, Noreen, IRSHAD, Muhammad Kashif, and AQEEL, Muhammad

Subjects
RAPESEED, SOIL remediation, SOIL pollution, POLLUTION remediation, WATER pollution
Abstract

Global crop yield and growth are severely impacted by hazardous heavy metal contamination of the soil and water. Hence, this study examined the effects of three different levels of cadmium (Cd) stress (concentrations of 0, 1.5, and 2.25 mM) and the foliar application of a biostimulant, i.e. Moringa leaf extract (MLE), on a range of physiological, biochemical, and morphological parameters of two canola (Brassica napus L.) cultivars, Punjab (V1) and Super (V2). More Cd was accumulated in both the aerial and subterranean sections of V1 than in V2. The morphological and physiological indicators showed a substantial (p < 0.05) deterioration as a result of the Cd buildup. The ascorbic acid, malondialdehyde (MDA), and hydrogen peroxide (H2O2) levels were considerably (p < 0.05) elevated under Cd stress. V1 had considerably higher H2O2 levels than V2, which suggests that the oxidative stress levels were higher. Additionally, the activity of some antioxidant enzymes, such as catalase and peroxidase (POD) (65% and 40%, respectively), were decreased by the higher concentration of Cd (2.25 mM). V2 demonstrated stronger antioxidant defense mechanisms than V1, as seen by a 115% increase in POD activity, a 70% increase in shoot fresh weight, and a 49% increase in amino acids following the MLE application. Despite this, V2 was still able to withstand the Cd. Under Cd stress, the foliar treatment of MLE increased the yield, growth, biochemical, and physiological characteristics of both V1 and V2. The findings indicated that applying MLE foliar spray can improve crop productivity and lessen the impacts of metals on B. napus L. [ABSTRACT FROM AUTHOR]

Published
2024
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41. Elucidating melatonin-mediated distinct mechanistic of specific gene expression of coriander (Coriandrum sativum L.) under chromium stress.

Author

AL-HUQAIL, Arwa Abdulkreem, Suliman ALGHANEM, Suliman Mohammed, Sakit ALHAITHLOUL, Haifa Abdulaziz, NAEEM, Nayab, SARFRAZ, Wajiha, KHALID, Noreen, and ALI, Baber

Subjects
CORIANDER, GENE expression, GAS exchange in plants, PLANT transpiration, CHROMIUM, PHOTOSYNTHETIC pigments, OXIDANT status
Abstract

The current investigation demonstrates that the application of MEL (0, 1, and 2 μmol L−1) mitigates the effects of Cr stress 0 (no Cr), 50 and 100 mg kg−1 on coriander (Coriandrum sativum L.) plants. Results from the present study showed that the increasing levels of Cr concentration in the soil induced a significant decrease in shoot length, root length, shoot fresh weight, root fresh weight, shoot dry weight, root dry weight, chlorophyll-a, chlorophyll-b, total chlorophyll, carotenoid contents, net photosynthesis, transpiration rate and stomatal conductance by 36%, 24%, 17%, 64%, 27%, 23%, 19%, 29%, 36%, 18%, 73%, 83%, and 43% respectively. Results findings also showed that the increasing Cr stress in the soil significantly (p< 0.05) decreases calcium, magnesium, iron, and phosphorus contents by 69%, 51%, 89%, and 109% respectively in the roots and decreased by 164%, 97%, 66%, and 124% respectively in the shoots. However, Cr toxicity boosted the production of reactive oxygen species (ROS) by increasing the contents of oxidative stress indicators. Although activities of various antioxidative enzymes and their specific gene expression and also the nonenzymatic antioxidants initially increased up to a Cr level of 50 μM but decreased gradually with the further increase in the Cr level of 100 μM in the medium, compared to those plants which were grown in the control treatment. Results also revealed that the soluble sugar, reducing sugar, and nonreducing sugar were decreased in plants grown under elevating Cr levels but increased the Cr accumulation in the roots and shoots of C. sativum. Although results also illustrated that the application of MEL also decreased Cr toxicity in C. sativum by increasing antioxidant capacity and their gene expression and thus improved the plant growth, photosynthetic pigments, and decrease oxidative stress in the roots and shoots of C. sativum. [ABSTRACT FROM AUTHOR]

Published
2024
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