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Impact of selenium, zinc and their interaction on key enzymes, grain yield, selenium, zinc concentrations, and seedling vigor of biofortified rice. 2020

Hla Hla Ei, and Tengda Zheng, and Muhammad Umer Farooq, and Rui Zeng, and Yang Su, and Yujie Zhang, and Yuanke Liang, and Zhichen Tang, and Xiaoying Ye, and Xiaomei Jia, and Jianqing Zhu
Rice Research Institute, Sichuan Agricultural University, Chengdu, 611130, Sichuan, China.

Selenium (Se) is an essential micronutrient and important component of oxidase which protects cell membranes, eliminate the role of free radicals in the human body. Se is necessary for low Se rice genotypes and Se deficient areas. Zinc (Zn) is a micro-battalion that affects the growth, development, aging, drought resistance, disease resistance, and many other aspects for rice. The effects of Se and Zn fertilization on Se and Zn concentrations were evaluated including the response of superoxide dismutase (SOD), catalase (CAT) enzymes activity, and grain yield under single Se, Zn, and combined Se-Zn application using R725 rice variety in pot experiment with 8 treatments (0, Zn5, Zn10, Zn15, Se1, Zn5 + Se1, Zn10 + Se1, and Zn15 + Se1) mg/kg of soil and three replications. Moreover, germination% and seedling growth of resulted seeds from this experiment were evaluated for the agronomical benefit of farmers. The results revealed that Se and Zn had a cumulative effect on each other, but more Se increase was activated than Zn under the combined Se-Zn application. Zinc application had the small effect on Zn concentration in the different fractions but the positive effect on carotenoids and the yield (both applied alone and in combination with Se). Single Se application resulted in a positive effect on Zn accumulation in grain and husk with the high effectiveness of Se accumulation and loss during processing. Combined Se-Zn application had positive effect on carotenoids, CAT, grain yield, and total dry matter. Moreover, single Zn and combined Se-Zn application had a positive effect on germination% and seedling growth. Agronomic biofortification with combined Se-Zn supply provided both agronomic and nutritional benefits for rice in the current pot trail. However, as Se preferably accumulated in the edible part as compared to Zn, 1 mg Se/kg fertilization was unsafe for edible purposes according to the national standard of China (0.04-0.3 mg/kg) but could be recommended as medicine.

UI MeSH Term Description Entries
D002523 Edible Grain SEEDS used as a major nutritional source, most often the grain from the POACEAE family. Cereals,Cereal Grain,Cereal,Cereal Grains,Edible Grains,Grain, Cereal,Grain, Edible,Grains, Cereal,Grains, Edible
D002681 China A country spanning from central Asia to the Pacific Ocean. Inner Mongolia,Manchuria,People's Republic of China,Sinkiang,Mainland China
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012275 Oryza A genus of grass family (Poaceae) that include several rice species. Oryza sativa,Rice,Rices
D012643 Selenium An element with the atomic symbol Se, atomic number 34, and atomic weight 78.97. It is an essential micronutrient for mammals and other animals but is toxic in large amounts. Selenium protects intracellular structures against oxidative damage. It is an essential component of GLUTATHIONE PEROXIDASE. Selenium-80,Selenium 80
D015032 Zinc A metallic element of atomic number 30 and atomic weight 65.38. It is a necessary trace element in the diet, forming an essential part of many enzymes, and playing an important role in protein synthesis and in cell division. Zinc deficiency is associated with ANEMIA, short stature, HYPOGONADISM, impaired WOUND HEALING, and geophagia. It is known by the symbol Zn.
D036226 Seedlings Young plants produced at the completion of GERMINATION of SEEDS. Seedling,Malted Grain,Sprouted Seeds,Sprouts, Plant,Grain, Malted,Grains, Malted,Malted Grains,Plant Sprout,Plant Sprouts,Seed, Sprouted,Seeds, Sprouted,Sprout, Plant,Sprouted Seed

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