نقش كاربرد برگي نانو سيليس و تلقيح با قارچ‌هاي آربسكولار مايكوريزا بر ويژگي‌هاي عملكردي گل محمدي و جمعيت برخي از آفات آن

Damask rose (Rosa damascena Mill.) is one of the most important medicinal, aromatic, an‎d ornamental plants cultivated in Iran, with its economic value largely determined by flower production, essential oil composition, an‎d bioactive compounds. The use of biostimulants may provide a sustainable approach to improving plant growth, quality, physiological performance, an‎d resistance to biotic stresses. The present study was conducted to investigate the effects of arbuscular mycorrhizal fungi (AMF) an‎d silicon nanoparticles on morphological, physiological, nutritional, phytochemical, essential oil, an‎d pest-related traits in different Damask rose genotypes. The experiment was carried out at the Research Farm of Isfahan University of Technology using a split-plot arrangement within a ran‎domized complete block design. Five Damask rose genotypes (D237, D234, A104, A105, an‎d C193) were eva‎luated under two mycorrhizal conditions (inoculated an‎d non-inoculated) an‎d three foliar silicon nanoparticle concentrations (0, 20, an‎d 40 mg L⁻¹). The results showed that the combined application of AMF an‎d 40 mg L⁻¹ silicon nanoparticles significantly increased stem length an‎d stem diameter by 19% an‎d 58%, respectively, compared with the control. This treatment also increased catalase an‎d ascorbate peroxidase activities, total leaf chlorophyll content, chlorophyll index, water-use efficiency, photosynthetic performance index, an‎d normalized difference vegetation index (NDVI) by 21%, 74%, 47%, 48%, 41%, 68%, an‎d 31%, respectively. In contrast, leaf temperature, malondialdehyde, hydrogen peroxide, an‎d electrolyte leakage decreased by 19%, 35%, 41%, an‎d 24%, respectively. The combined treatment increased leaf magnesium, iron, an‎d silicon concentrations while reducing nickel an‎d mercury accumulation. Aphid an‎d mite populations were also reduced by 57% an‎d 58%, respectively. Essential oil analysis indicated favorable changes in the relative abundance of aromatic compounds, including linalool, geraniol, citronellol, an‎d rose oxide. In genotype C193, the combined application of AMF an‎d 20 mg L⁻¹ silicon nanoparticles increased linalool an‎d geraniol contents by 56% an‎d 63.1%, respectively, an‎d increased rose oxide by more than threefold compared with the control. Overall, the findings demonstrate that the integrated application of AMF an‎d silicon nanoparticles, particularly when combined with a responsive genotype such as C193, can serve as a sustainable strategy for improving growth, physiological performance, mineral nutrition, essential oil quality, an‎d pest resistance in Damask rose.

علي نيكبخت , مهدي رحيم ملك

جهانگير خواجه علي , مجيد طالبي

مهديه غلامي , محمدعلي حاج عباسي جورتاني , سعيد ريزي