Lead-Tolerant Bacillus Strains Promote Growth and Antioxidant Activities of Spinach (Spinacia oleracea) Treated with Sewage Water

被引：4

作者：

Najm-ul-Seher ^{[1
]}

Ahmad, Maqshoof ^{[1
]}

Ahmad, Iqra ^{[1
]}

Nazli, Farheen ^{[2
]}

Mumtaz, Muhammad Zahid ^{[3
]}

Latif, Muhammad ^{[4
]}

Al-Mosallam, Mobarak S. ^{[5
]}

Alotaibi, Fahad S. ^{[5
]}

Dewidar, Ahmed Z. ^{[6
]}

Mattar, Mohamed A. ^{[6
,7
,8
]}

El-Shafei, Ahmed A. ^{[6
,7
,9
]}

机构：

[1] Islamia Univ Bahawalpur, Dept Soil Sci, Bahawalpur 63100, Pakistan

[2] Govt Punjab, Punjab Agr Dept, Pesticide Qual Control Lab, Bahawalpur 63100, Pakistan

[3] Univ Lahore, Inst Mol Biol & Biotechnol, Main Campus, Lahore 54000, Pakistan

[4] Islamia Univ Bahawalpur, Dept Agron, Bahawalpur 63100, Pakistan

[5] King Abdulaziz City Sci & Technol, King Abdullah Rd, Riyadh 11442, Saudi Arabia

[6] King Saud Univ, Prince Sultan Inst Environm Water & Desert Res, Prince Sultan Bin Abdulaziz Int Prize Water Chair, POB 2454, Riyadh 11451, Saudi Arabia

[7] King Saud Univ, Dept Agr Engn, Coll Food & Agr Sci, Riyadh 11451, Saudi Arabia

[8] Agr Res Ctr, Agr Engn Res Inst AEnRI, Giza 12618, Egypt

[9] Alexandria Univ, Fac Agr El Shatby, Dept Agr Engn, Alexandria 21545, Egypt

来源：

AGRONOMY-BASEL | 2021年 / 11卷 / 12期

关键词：

antioxidant activities; Bacillus spp; heavy metals tolerance; lead-tolerant bacteria; Spinacia oleracea; wastewater; HEAVY-METALS; WASTE-WATER; PLANT-GROWTH; SOIL; CONTAMINATION; MODULATION; TOXICITY; IMPACT;

D O I：

10.3390/agronomy11122482

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Irrigation with sewage-contaminated water poses a serious threat to food security, particularly in developing countries. Heavy metal tolerant bacteria are sustainable alternatives for the removal of wastewater contaminants. In the present study, four lead (Pb)-tolerant strains viz. Bacillus megaterium (N8), Bacillus safensis (N11), Bacillus sp. (N18), and Bacillus megaterium (N29) were inoculated in spinach and grown in sewage water treated earthen pots separately and in combination with canal water. Results showed that Pb-tolerant strains significantly improved plant growth and antioxidant activities in spinach and reduces metal concentration in roots and leaves of spinach plants irrigated with treated wastewater. Strain Bacillus sp. (N18) followed by B. safensis (N11) caused the maximum increase in shoot length, root length, shoot fresh weight, root fresh weight, shoot dry weight, root dry weight, and leaf area compared to the uninoculated control of sewage water treated plants. These strains also improved antioxidant enzymatic activity including catalase, guaiacol peroxidase dismutase, superoxide dismutase, and peroxidases activities compared to the uninoculated control under sewage water conditions. Strain Bacillus sp. (N18) followed by B. safensis (N11) showed the highest reduction in nickel, cadmium, chromium, and Pb contents in roots and leaves of spinach compared to the uninoculated control plants treated with the sewage water. Such potential Pb-tolerant Bacillus strains could be recommended for the growth promotion of spinach after extensive evaluation under field conditions contaminated with wastewater.

引用

页数：16