tailieunhanh - Exogenously sourced γ-irradiated chitosan-mediated regulation of growth, physiology, quality attributes, and yield in Mentha piperita L.

In view of the increasing demand for essential oils from medicinal and aromatic plants, the application of irradiated polysaccharides like chitosan is a promising option. | Turkish Journal of Biology Turk J Biol (2017) 41: 388-401 © TÜBİTAK doi: Research Article Exogenously sourced γ-irradiated chitosan-mediated regulation of growth, physiology, quality attributes, and yield in Mentha piperita L. 1, 1 1 1 1 2 Bilal AHMAD *, M. Masroor A. KHAN , Hassan JALEEL , Yawar SADIQ , Asfia SHABBIR , Moin UDDIN 1 Department of Botany, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India 2 Botany Section, Women’s College, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, India Received: Accepted/Published Online: Final Version: Abstract: In view of the increasing demand for essential oils from medicinal and aromatic plants, the application of irradiated polysaccharides like chitosan is a promising option. A pot experiment was performed to study the influence of various concentrations of irradiated chitosan (ICN) on growth, physiological, and yield parameters of Mentha piperita L., a plant with considerable pharmaceutical importance. The treatments were foliar spray of deionized water only (control), foliar spray of unirradiated chitosan (40 mg L–1), and ICN at 40, 80, 120, and 160 mg L–1. Among these, 80 mg L–1 ICN (treatment 4) proved to be the best for most of the parameters studied. This treatment increased the fresh and dry weights of the plant by and , respectively. Furthermore, 80 mg L–1 ICN also showed an increase of and in carbonic anhydrase and nitrate reductase activity, respectively, while chlorophyll fluorescence was increased by compared to the control. Leaf nitrogen content showed an enrichment of whereas phosphorus and potassium contents increased by and , respectively, exceeding the control. Total phenol content exhibited an increment of . Treatment 4 (80 mg L–1 ICN) improved essential oil content and yield by and , respectively, at 150 .