Effects of nano-silver and exotic arbuscular mycorrhizal fungi on chlorophyll fluorescence kinetics of sweet sorghum

doi:10.3969/j.issn.1004-1524.2020.02.12

›› 2020, Vol. 32 ›› Issue (2): 283-290.DOI: 10.3969/j.issn.1004-1524.2020.02.12

• Plant Protection • Previous Articles Next Articles

Effects of nano-silver and exotic arbuscular mycorrhizal fungi on chlorophyll fluorescence kinetics of sweet sorghum

SHI Zhaoyong¹, LI Ke¹, WANG Fayuan², WANG Xugang¹, XU Xiaofeng¹

1. Agricultural College, Henan University of Science and Technology, Luoyang 471003, China;
2. College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China

Received:2019-07-25 Online:2020-02-25 Published:2020-03-13

Abstract

Abstract: Nanosilver is one of the most widely used artificial nanomaterials and has certain biological toxicity. Arbuscular mycorrhizal fungi (AMF) can establish a mutualistic symbiotic relationship with 80% of plants on land, and can improve the plant’s absorption of mineral nutrients, promote photosynthesis and improve stress resistance. However, the combining effects of nanosilver and AMF on the chlorophyll fluorescence properties of plants are still not clear. In this experiment, the energy plant sweet sorghum was selected as the tested plant, and the greenhouse pot experiment was conducted in an unsterilized soil to study the effect of inoculation of exogenous AMF on the chlorophyll fluorescence-inducing kinetics of sweet sorghum under different nano-silver levels. As a result, it was found that nano-silver has certain toxicity to exogenous AMF and inhibited mycorrhizal colonization of plant roots. With the increase of nano-silver concentration, the donor side of PSⅡ was injured with the destroyed structure, and the maximum photochemical efficiency (F_v/F_m) and potential activity of PSII (F_v/F_o) were inhibited, and the light efficiency of PSⅡ was reduced. However, the inoculation of exogenous AMF could reduce the damage to the structure of PSⅡ by increasing the heat dissipation, which protected the plant. It was confirmed that the toxicity of nano-silver to sweet sorghum could be alleviated by inoculating AMF under the condition of non-sterilization, but the effect was related to the dosage of nano-silver.

Key words: nano-silver, sweet sorghum, arbuscular mycorrhizal fungi, chlorophyll fluorescence, PS Ⅱ

CLC Number:

S514

SHI Zhaoyong, LI Ke, WANG Fayuan, WANG Xugang, XU Xiaofeng. Effects of nano-silver and exotic arbuscular mycorrhizal fungi on chlorophyll fluorescence kinetics of sweet sorghum[J]. , 2020, 32(2): 283-290.

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Effects of nano-silver and exotic arbuscular mycorrhizal fungi on chlorophyll fluorescence kinetics of sweet sorghum

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