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Zeng Y.,Yunnan Academy of Agricultural Sciences | Zeng Y.,Key Laboratory of Agricultural Biotechnology of Yunnan Province | Zeng Y.,Yunnan Agricultural University | Zhang H.,China Agricultural University | And 8 more authors.
Environmental Geochemistry and Health | Year: 2010

The mineral elements present in brown rice play an important physiological role in global human health. We investigated genotypic variation of eight of these elements (P, K, Ca, Mg, Fe, Zn, Cu, and Mn) in 11 different grades of brown rice on the basis of the number and distance coefficients of 282 alleles for 20 simple sequence repeat (SSR) markers. Six-hundred and twenty-eight landraces from the same field in Yunnan Province, one of the largest centers of genetic diversity of rice (Oryza sativa L.) in the world, formed our core collection. The mean concentrations (mg kg-1) of the eight elements in brown rice for these landraces were P (3,480) > K (2,540) > Mg (1,480) > Ca (157) > Zn (32.8) > Fe (32.0) > Cu (13.6) > Mn (13.2). Mean P concentrations in brown rice were 6.56 times total soil P, so the grains are important in tissue storage of P, but total soil K is 7.82 times mean K concentrations in brown rice. The concentrations of the eight elements in some grades of brown rice, on the basis of the number and distance coefficients of alleles for 20 SSR markers for the landraces, were significantly different (P < 0.05), and further understanding of the relationship between mineral elements and gene diversity is needed. There was large variation in element concentrations in brown rice, ranging from 2,160 to 5,500 mg P kg-1, from 1,130 to 3,830 mg K kg-1, from 61.8 to 488 mg Ca kg-1, from 864 to 2,020 mg Mg kg-1, from 0.40 to 147 mg Fe kg-1, from 15.1 to 124 mg Zn kg-1, from 0.10 to 59.1 mg Cu kg-1, and from 6.7 to 26.6 mg Mn kg-1. Therefore, germplasm evaluations for Ca, Fe, and Zn concentrations in rice grains have detected up to sevenfold genotypic differences, suggesting that selection for high levels of Ca, Fe, and Zn in breeding for mass production is a feasible approach. Increasing the concentrations of Ca, Fe, and Zn in rice grains will help alleviate chronic Ca, Zn, and Fe deficiencies in many areas of the world. © Springer Science+Business Media B.V. 2009.

Yu P.,Yunnan Academy of Agricultural Sciences | Yu P.,Key Laboratory of Agricultural Biotechnology of Yunnan Province | Su Y.,Kunming University | Dong C.,Yunnan Academy of Agricultural Sciences | And 7 more authors.
Plant Growth Regulation | Year: 2015

Volatile organic compounds (VOCs) play an important role in plant communication. Rose floral scent consists of many VOCs, such as aroma alcohols, esters and terpenes. It remains unclear if floral scent from rose can affect the growth of tobacco. In order to explore the tobacco response induced by rose floral scent, we performed the proteomic analysis on tobacco leaves influenced by floral scent from rose using two-dimensional electrophoresis. Protein profiles revealed that 470 ± 37 and 319 ± 18 protein spots were detected in sole tobacco and tobacco/rose intercropping samples, respectively. Compared with those of sole tobacco samples, 26 protein spots exhibited at least twofold change at the protein level, including six up-regulated and 20 down-regulated proteins. In addition, 20 proteins were identified by MALDI-TOF/OF MS analysis and database searches, and results showed that they were involved in the defense response, photosynthesis, protein catabolic process, regulation of stomata movement and electron transport. © 2014, Springer Science+Business Media Dordrecht.

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