Protective effects of the exogenous application of salicylic acid and chitosan on chromium-induced photosynthetic capacity and osmotic adjustment in Aconitum napellus.

Autor: Ramzan M; Department of Botany, Faculty of Chemical and Biological Sciences, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan., Javed T; Department of Botany, Faculty of Chemical and Biological Sciences, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan., Hassan A; Department of Botany, Faculty of Chemical and Biological Sciences, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan., Ahmed MZ; Dr. M. Ajmal Khan Institute of Sustainable Halophyte Utilization, University of Karachi, Karachi, 75270, Pakistan., Ashraf H; Department of Botany, The Government Sadiq College Women University Bahawalpur, Bahawalpur, 63100, Pakistan., Shah AA; Department of Botany, Division of Science and Technology, University of Education Lahore, Lahore, 54700, Pakistan. anisalibot@gmail.com., Iftikhar M; Department of Botany, Division of Science and Technology, University of Education Lahore, Lahore, 54700, Pakistan., El-Sheikh MA; Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia., Raja V; University Centre for Research and Development, Chandigarh University, Gharuan, Mohali, Punjab, 140413, India.
Jazyk: angličtina
Zdroj: BMC plant biology [BMC Plant Biol] 2024 Oct 08; Vol. 24 (1), pp. 933. Date of Electronic Publication: 2024 Oct 08.
DOI: 10.1186/s12870-024-05634-z
Abstrakt: Chitosan (CTS) is recognized for enhancing a plant's resilience to various environmental stresses, such as salinity and drought. Moreover, salicylic acid (SA) is acknowledged as a growth regulator involved in addressing metal toxicity. However, the effectiveness of both compounds in mitigating Cr-induced stress has remained relatively unexplored, especially in the case of Aconitum napellus, a medicinally and floricultural important plant. Therefore, the primary objective of this study was to investigate the potential of CTS and SA in alleviating chromium (Cr)-induced stress in A. napellus. To address these research questions, we conducted a controlled experiment using potted plants to evaluate the individual and combined impacts of CTS and SA on plants exposed to Cr stress. Foliar application of CTS (0.4 g/L) or SA (0.25 mmol/L) led to significant improvements in the growth, chlorophyll content, fluorescence, and photosynthetic traits of A. napellus plants under Cr stress. The most notable effects were observed with the combined application of CTS and SA, resulting in increases in various morphological parameters, such as shoot length (2.89% and 7.02%) and root length (27.75% and 3.36%) under the Cr 1 and Cr 2 treatments, respectively. Additionally, several physiological parameters, such as chlorophyll a (762.5% and 145.56%), chlorophyll b (762.5% and 145.56%), carotenoid (17.03% and 28.57%), and anthocyanin (112.01% and 47.96%) contents, were notably improved under the Cr 1 and Cr 2 treatments, respectively. Moreover, the combined treatment of CTS and SA improved the fluorescence parameters while decreasing the levels of enzymatic antioxidants such as catalase (27.59% and 43.79%, respectively). The application also notably increased osmoprotectant parameters, such as the total protein content (54.11% and 20.07%) and the total soluble sugar content (78.17% and 49.82%) in the leaves of A. napellus in the Cr 1 and 2 treatments, respectively. In summary, these results strongly suggest that the simultaneous use of exogenous CTS and SA is an effective strategy for alleviating the detrimental effects of Cr stress on A. napellus. This integrated approach opens promising avenues for further exploration and potential implementation within agricultural production systems.
(© 2024. The Author(s).)
Databáze: MEDLINE
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