[Mitigative Effect of Rare Earth Element Cerium on the Growth of Zinc-stressed Wheat ï¼Triticum aestivum L.ï¼Seedlings].
Huan Jing Ke Xue
; 45(2): 1141-1149, 2024 Feb 08.
Article
in Zh
| MEDLINE
| ID: mdl-38471951
ABSTRACT
This research aimed to clarify the mitigative effect of exogenously applied rare earth element cerium ï¼Ceï¼ on the growthï¼ zinc ï¼Znï¼ accumulationï¼ and physiological characteristics of wheat ï¼Triticum aestivum L.ï¼ seedlings under Zn stress. The wheat variety studied was Bainong307 ï¼BN307ï¼ï¼ and Zn stress was achieved by growing seedlings in a hydroponic culture experiment with 500 µmol·L-1 Zn2 + added to the culture solution. It was found that Zn stress at 500 µmol·L-1 significantly inhibited the chlorophyll contentï¼ photosynthesisï¼ and biomass accumulation of wheat seedlings. Seedling roots became shorter and thickerï¼ and the lateral roots decreased under Zn stress. The Zn stress also increased MDA accumulation and the degree of cell membrane lipid peroxidation and reduced soluble protein contents and the activities of antioxidant enzymes such as superoxide dismutase ï¼SODï¼ï¼ catalase ï¼CATï¼ï¼ and ascorbate peroxidase ï¼APXï¼. On the contraryï¼ exogenous Ce decreased the adsorption and transport of Zn by the root system and alleviated the damage of Zn stress to wheat seedlings. Specificallyï¼ the increase in chlorophyll content ï¼chlorophyll aï¼ chlorophyll bï¼ and total chlorophyllï¼ and photosynthetic parametersï¼ the enhancement of antioxidant enzymes activities and soluble protein levelsï¼ and the reduction in MDA content and the damage of lipid peroxidation to the cell membrane were all driven by exogenous Ceï¼ which ultimately led to the increase in dry matter biomass of the root system and shoot. In summaryï¼ these results provide basic data for the application of exogenous Ce to alleviate Zn toxicity to plants.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Zinc
/
Cerium
Language:
Zh
Journal:
Huan Jing Ke Xue
Year:
2024
Document type:
Article
Affiliation country:
China