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Copyright of Egyptian Journal of Botany is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Egyptian Journal of Botany is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Egyptian Journal of Experimental Biology (Botany) is the property of Egyptian Society of Experimental Biology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Egyptian Journal of Microbiology is the property of Egyptian National Agricultural Library (ENAL) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The potato virus Y (PVY) is considered one of the most important viruses in terms of both economical and biological impact. Potential of using three different Streptomyces spp. crude filtrates (SCF) to induce of resistance against tuber necrotic strain of potato virus Y (PVYNTN) in four potato cultivars namely, Spunta, Nicola, Selatar, and Diamant, were evaluated. Foliar spraying of Streptomyces netropsis DSM 40093 (SCF7), S. ambofaciens (SCF11) and S. actuosus (SCF20), applied separately on potato cultivated in pots, showed various inhibitory activities against PVYNTN infection in all the potato cultivars. SCF20 was the most effective one, as expressed by (100%) reduction of apical necrosis symptoms on potato cv. Spunta, Nicola, and Diamant leaves under greenhouse conditions. Application was done 7 days before virus inoculation with PVYNTN (DBVI) and 7 days after inoculation (DAVI). The concentration of PVYNTN in treatments was significantly reduced than in the untreated PVYNTN infected plants as detected by DAS-ELISA (expressed by decreasing in OD value). Expression of PR-1b gene was detected 21 (DAVI) in all SCF11-treated cultivars but was not expressed in healthy and infected control plants. Gas chromatography-mass spectrometry (GC-MS) analysis of S. actuosus (SCF20) ethyl acetate extract revealed the majority of fatty acids (FAs) and their derivatives, Citroflex A, Hexanoic acid, anhydride, Hexadecanoic acid, Hexadecanoic acid, ethyl ester, and Diisooctyl phthalate which suggested to act as elicitor molecules for induction of systemic acquired resistance (SAR). Overall, the application of culture filtrates of Streptomyces has the potentiality to be used as inducer against PVYNTN infection. [ABSTRACT FROM AUTHOR]

<b>Background and Objective:</b> For more than a decade, breast cancer has been one of the most common forms of cancer among women around the world. The present article aimed to evaluate the protective activity of CEG-AgNPs against DMBA-induced mammary carcinoma. <b>Materials and Methods:</b> In this experimental study, green synthesis and characterization of CEG-AgNPs were carried as well as IC<sub>50</sub> against Mcf7 cell line and LD<sub>50</sub> on mice were evaluated. A total of 24 adult albino mice were divided into four groups six rats in each. Group I was given an equal amount of distilled water, group II was received 80 mg kg<sup></sup><sup>1</sup> b.wt., DMBA for 4 weeks, groups III and IV were treated with CEG-AgNPs (28.1 and 70.25 mg kg<sup></sup><sup>1</sup>) from the 5th week of DMBA administration for 4 weeks, respectively. <b>Results:</b> CEG-AgNPs were approximately 42.32±9.52 nm with a negative zeta potential of -17.44. It is IC<sub>50</sub> against the Mcf7 cell line and LD<sub>50</sub> is equal to 82.76 μg mL<sup></sup><sup>1</sup> and 1405 mg kg<sup></sup><sup>1</sup> b.wt., A significant normalization in plasma ALT, AST, AST and LDH as well as mammary MDA, TNF-α, IL-6, P53, SOD, GPx and GSH levels have been observed in CEG-AgNPs treated mice. Oral CEG-AgNPs administration has suppressed VEGF-C gene expression in DMBA-treated mice. <b>Conclusion:</b> The present results, biochemical, histological and MRI results showed that CEG-AgNPs have potent anticancer activity against DMBA-induced mammary carcinoma in mice by inducing the biosynthesizes of antioxidant biomarkers and suppression of cytokines gene expression.