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Publication Type J
Authors Alam, H., J. Z. K. Khattak, T. S. Ksiksi, M. H. Saleem, S. Fahad, H. Sohail, Q. Ali, M. Zamin, M. A. El-Esawi, S. Saud, X. Jiang, M. S. Alwahibi and J. Alkahtani
Title Negative impact of long-term exposure of salinity and drought stress on native Tetraena mandavillei L
Source Physiologia Plantarum
Author Keywords growth-promoting rhizobacteria early seedling growth brassica-napus l. morphophysiological traits biochemical response antioxidant defense landscape position chromium toxicity hydrogen-peroxide water relations
Abstract Tetraena mandavillei L. is a perennial shrub native to the Middle Eastern countries of Asia, which is extensively regarded as a drought-tolerant plant. However, the plant reduces growth and biomass when grown in high concentrations of sodium chloride in the soil. We conducted a pot experiment to influence the negative impact of different levels of salinity (0, 10, and 20 dSm(-1)) and drought stress (100, 80, 60, and 40% water field capacity), to study different growth-related parameters, physiological alterations and ion uptake by T. mandavillei. Both salinity and drought stress caused a negative impact by affecting several attributes of T. mandavillei, but the plants showed some resistance against drought stress conditions in terms of growth and biomass. In addition to that, we noticed that a combinatorial and individual impact of drought and salinity stress decreased photosynthetic pigments and gas exchange parameters in T. mandavillei. Results also depicted that the combination of the abiotic stress conditions drought and salinity induced reactive oxygen species (ROS), indicating that the plants undergo oxidative damaged. However, due to the active plant defense system, the plant enhanced its performance under abiotic stress conditions, but due to the severe drought condition (40% water field capacity), a significant (P < 0.05) decrease in the activities of antioxidant compounds was caused. Furthermore, osmolytes also increased under both salinity and drought stress conditions in this study. Our results also showed that increased salinity and drought stress in the soil caused a significant increase in sodium (Na+) and chloride (Cl-) ions in roots and shoots of T. mandavillei. In contrast to that, the contents of Calcium (Ca2+) and potassium (K+) were decreased in all organs of the plants with increasing levels of salinity and drought stress. Taken together, T. mandavillei can be classified as a facultative halophyte with the ability to tolerate drought stress and using salt accumulation mechanisms to tolerate salinity stress.
Author Address [Alam, Hasnain; Khattak, Jabar Z. K.] Int Islamic Univ, Dept Biol Sci, Islamabad, Pakistan. [Ksiksi, Taoufik S.] United Arab Emirates Univ, Dept Biol, Coll Sci, Al Ain, U Arab Emirates. [Saleem, Muhammad H.] Huazhong Agr Univ, Coll Plant Sci & Technol, MOA Key Lab Crop Ecophysiol & Farming Syst Middle, Wuhan, Peoples R China. [Fahad, Shah] Hainan Univ, Coll Trop Crops, Hainan Key Lab Sustainable Utilizat Trop Bioresou, Haikou 570228, Hainan, Peoples R China. [Fahad, Shah] Univ Haripur, Dept Agron, Haripur, Pakistan. [Sohail, Hamza] Huazhong Agr Univ, Coll Hort & Forestry Sci, Key Lab Hort Plant Biol, Minist Educ, Wuhan, Peoples R China. [Ali, Qasim] Govt Coll Univ, Dept Bot, Faisalabad, Pakistan. [Zamin, Muhammad] Univ Swabi, Dept Agr, Swabi, Pakistan. [El-Esawi, Mohamed A.] Tanta Univ, Bot Dept, Fac Sci, Tanta, Egypt. [Saud, Shah] Northeast Agr Univ, Dept Hort, Harbin, Peoples R China. [Jiang, Xue] Xinjiang Univ, Coll Life Sci & Technol, Urumqi, Peoples R China. [Alwahibi, Mona S.; Alkahtani, Jawaher] King Saud Univ, Coll Sci, Dept Bot & Microbiol, Riyadh, Saudi Arabia. Fahad, S (corresponding author), Hainan Univ, Coll Trop Crops, Hainan Key Lab Sustainable Utilizat Trop Bioresou, Haikou 570228, Hainan, Peoples R China. shah_fahad80@yahoo.com
ISSN 0031-9317
ISBN 0031-9317
29-Character Source Abbreviation Physiol. Plant.
Digital Object Identifier (DOI) 10.1111/ppl.13273
Unique Article Identifier WOS:000590752300001

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