Cadmium toxicity in cowpea plant: Effect of foliar intervention of nano-TiO2 on tissue Cd bioaccumulation, stress enzymes and potential dietary health risk

被引：58

作者：

Ogunkunle, Clement Oluseye ^{[1
]}

Odulaja, Deborah Ayomide ^{[1
]}

Akande, Funmilola Ojuolape ^{[2
]}

Varun, Mayank ^{[3
]}

Vishwakarma, Vinita ^{[4
]}

Fatoba, Paul Ojo ^{[1
]}

机构：

[1] Univ Ilorin, Environm Biol Unit, Dept Plant Biol, Fac Life Sci, PMB 1515, Ilorin 240003, Nigeria

[2] Obafemi Awolowo Univ, Inst Ecol & Environm Studies, Ife, Nigeria

[3] HISLOP Coll, Dept Bot, Nagpur 440001, Maharashtra, India

[4] Sathyabama Inst Sci & Technol, Ctr Nanosci & Nanotechnol, Chennai 600119, Tamil Nadu, India

来源：

JOURNAL OF BIOTECHNOLOGY | 2020年 / 310卷 / 310期

关键词：

Nano-remediation; Phytotoxicity; Cadmium; Titanium dioxide nanoparticles; Antioxidant enzymes; Nutritional quality; ZINC-OXIDE NANOPARTICLES; TRITICUM-AESTIVUM L; HEAVY-METALS; GROWTH; WHEAT; RICE; SEEDLINGS; SPINACH; SOIL; PHYTOTOXICITY;

D O I：

10.1016/j.jbiotec.2020.01.009

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The study was conducted to investigate the effects of foliar-intervention of nano-TiO2 on Cd toxicity in cowpea plants. Cowpea plants were exposed to Cd toxicity at 10 mg/kg soil for 21 days and afterwards, subjected to six episodes of foliar application of nano-TiO2 intervention. Results showed that foliar-applied nano-TiO2 significantly promoted chlorophyll b and total chlorophyll contents after Cd stress as compared to Cd-stressed plants without the intervention. Interestingly, Cd contents of roots, shoots and grains were significantly reduced (p < 0.05) after nano-TiO2 sprays compared to Cd-stressed plants. However, the Cd contents in edible tissues (leaves and seeds) after interventions remained above recommended threshold. Furthermore, nano-TiO2 interventions promoted stress enzymes activity in both roots and leaves as well as increased Zn, Mn and Co levels in seeds compared to Cd-stressed plants without intervention. Estimated daily intake of Cd in leaves and seeds for adult subpopulation exceeded the WHO recommended daily intake by some folds in Cd-stressed and nano-TiO2-treated plants. The health risk quotient (HQ) for adult subpopulation exceeded unitary in seeds from nano-TiO2 treatments (HQ= 1.75 and 1.96, respectively) while no potential risk was obtained for leaves. Overall, foliar application of nano-TiO2 portends significant ameliorative potential for Cd toxicity in cowpea plants.

引用

页码：54 / 61

页数：8