Zinc oxide nanoparticles and Klebsiella sp. SBP-8 alleviates chromium toxicity in Brassica juncea by regulation of antioxidant capacity, osmolyte production, nutritional content and reduction in chromium adsorption

被引：3

作者：

Shah, Anis Ali ^{[1
]}

Zafar, Sadia ^{[1
]}

Usman, Sheeraz ^{[1
]}

Javad, Sumera ^{[2
]}

Zaib-un-Nisa ^{[3
]}

Aslam, Muhammad ^{[4
]}

Noreen, Zahra ^{[1
]}

Elansary, Hosam O. ^{[5
]}

Almutairi, Khalid F. ^{[5
]}

Ahmad, Aqeel ^{[6
,7
]}

机构：

[1] Univ Educ, Dept Bot, Div Sci & Technol, Lahore, Pakistan

[2] Lahore Coll Women Univ, Dept Bot, Lahore, Pakistan

[3] Univ Lahore, Inst Mol Biol & Biotechnol, Lahore, Pakistan

[4] Univ Educ, Dept Chem, Div Sci & Technol, Lahore, Pakistan

[5] King Saud Univ, Coll Food & Agr Sci, Plant Prod Dept, Riyadh 11451, Saudi Arabia

[6] Univ Chinese Acad Sci UCAS, Beijing, Peoples R China

[7] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing, Peoples R China

来源：

PLANT PHYSIOLOGY AND BIOCHEMISTRY | 2024年 / 210卷

关键词：

Brassica juncea; Chromium; Microbes; Nanoparticles; Plants; Stress; CADMIUM ACCUMULATION; PLANT; L; TOLERANCE; ACID;

D O I：

10.1016/j.plaphy.2024.108624

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Heavy metals are one of the most damaging environmental toxins that hamper growth of plants. These noxious chemicals include lead (Pb), arsenic (As), nickel (Ni), cadmium (Cd) and chromium (Cr). Chromium is one of the toxic metal which induces various oxidative processes in plants. The emerging role of nanoparticles as pesticides, fertilizers and growth regulators have attracted the attention of various scientists. Current study was conducted to explore the potential of zinc oxide nanoparticles (ZnONPs) alone and in combination with plant growth promoting rhizobacteria (PGPR) Klebsiella sp. SBP-8 in Cr stress alleviation in Brassica juncea (L.). Chromium stress reduced shoot fresh weight (40%), root fresh weight (28%), shoot dry weight (28%) and root dry weight (34%) in B. juncea seedlings. Chromium stressed B. juncea plants showed enhanced levels of malondialdehyde (MDA), electrolyte leakage (EL), hydrogen peroxide (H 2 O 2 ) and superoxide ion (O 2 center dot - ). However, cosupplementation of ZnONPs and Klebsiella sp. SBP-8 escalated the activity of antioxidant enzymes i.e., superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) in B. juncea grown in normal and Cr -toxic soil. It is further proposed that combined treatment of ZnONPs and Klebsiella sp. SBP-8 may be useful for alleviation of other abiotic stresses in plants.

引用

页数：13