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12 results on '"Song, Junliang"'

5. The soybean plasma membrane‐localized cation/H + exchanger GmCHX20a plays a negative role under salt stress

Author

Jia, Qi, primary, Li, Man‐Wah, additional, Zheng, Chengwen, additional, Xu, Yiyue, additional, Sun, Song, additional, Li, Zhong, additional, Wong, Fuk‐Ling, additional, Song, Junliang, additional, Lin, Wei‐Wei, additional, Li, Qinghua, additional, Zhu, Yebao, additional, Liang, Kangjing, additional, Lin, Wenxiong, additional, and Lam, Hon‐Ming, additional

Published
2020
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8. The soybean plasma membrane‐localized cation/H+ exchanger GmCHX20a plays a negative role under salt stress.

Author

Jia, Qi, Li, Man‐Wah, Zheng, Chengwen, Xu, Yiyue, Sun, Song, Li, Zhong, Wong, Fuk‐Ling, Song, Junliang, Lin, Wei‐Wei, Li, Qinghua, Zhu, Yebao, Liang, Kangjing, Lin, Wenxiong, and Lam, Hon‐Ming

Subjects
SOYBEAN, SALT, GENES, SALINITY, SALTS
Abstract

Cation/H+‐exchanger (CHX) perform diverse functions in plants, including being a part of the protective mechanisms to cope with salt stress. GmCHX1 has been previously identified as the causal gene in a major salt‐tolerance quantitative trait locus (QTL) in soybean, but little is known about another close paralog, GmCHX20a, found in the same QTL. In this study, GmCHX20a was characterized along with GmCHX1. The expression patterns of the two genes and the direction of Na+ flux directed by overexpression of these two transporters are different, suggesting that they are functionally distinct. The ectopic expression of GmCHX20a led to an increase in salt sensitivity and osmotic tolerance, which was consistent with its role in increasing Na+ uptake into the root. Although this seems counter‐intuitive, it may in fact be part of the mechanism by which soybean could counter act the effects of osmotic stress, which is commonly manifested in the initial stage of salinity stress. On the other hand, GmCHX1 from salt‐tolerant soybean was shown to protect plants via Na+ exclusion under salt stress. Taken together these results suggest that GmCHX20a and GmCHX1 might work complementally through a concerted effort to address both osmotic stress and ionic stress as a result of elevated salinity. [ABSTRACT FROM AUTHOR]

Published
2021
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10. Fluctuation driven phenomena in spinor Bose gas

Author

Song, Junliang

Subjects
Condensed Matter::Quantum Gases
Abstract

In this thesis, we have investigated several fluctuation-driven phenomena in ultracold spinor Bose gases. In Bose-Einstein condensates of hyperfine spin-two (F=2) atoms, it is shown that zero-point quantum fluctuations completely lift the accidental continuous degeneracy in quantum spin nematic phases predicted by mean field analysis, and these fluctuations select out two distinct spin nematic states with higher symmetries. It is further shown that fluctuations can drive a novel type of coherent spin dynamics which is very sensitive to the variation of quantum fluctuations controlled by magnetic fields or potential depths in optical lattices. These results have indicated fundamental limitations of precision measurements based on mean field theories. In addition, fluctuation-driven coherent spin dynamics studied here is a promising tool to probe correlated fluctuations in many body systems. In another system -- a two-dimension superfluid of spin-one (F=1) Na²³ atoms -- we have investigated spin correlations associated with half quantum vortices. It is shown that when cold atoms become superfluid below a critical temperature a unique nonlocal topological order emerges simultaneously due to fluctuations in low dimensional systems. Our simulation have indicated that there exists a nonlocal softened pi-spin disclination structure associated with a half-quantum vortex although spin correlations are short ranged. We have also estimated fluctuation-dependent critical frequencies for half-quantum vortex nucleation in rotating optical traps. These results indicate that the strongly fluctuating ultracold spinor system is a promising candidate for studying topological orders that are the focus of many other fields.

Published
2010
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11. Quantum entanglement in the S=1/2 spin ladder with ring exchange.

Author

Song, Junliang., Chinese University of Hong Kong Graduate School. Division of Physics., Song, Junliang., and Chinese University of Hong Kong Graduate School. Division of Physics.

Abstract

Song Junliang = 帶有環交換作用的自旋1/2梯子模型中的量子纠缠 / 宋均亮., Thesis (M.Phil.)--Chinese University of Hong Kong, 2006., Includes bibliographical references (leaves 60-67)., Text in English; abstracts in English and Chinese., Song Junliang = Dai you huan jiao huan zuo yong de zi xuan 1/2 ti zi mo xing zhong de liang zi jiu chan / Song Junliang., Chapter 1 --- Introduction --- p.1, Chapter 1.1 --- What is Entanglement --- p.1, Chapter 1.2 --- Quantum Information and Entanglement --- p.4, Chapter 1.3 --- Entanglement in Condensed Matter Physics --- p.6, Chapter 1.4 --- The S = 1/2 Spin Ladder with Ring Exchange --- p.9, Chapter 1.5 --- Arrangement of the Thesis Writing --- p.11, Chapter 2 --- Measures of Entanglement --- p.13, Chapter 2.1 --- Axiomatic Approach --- p.14, Chapter 2.2 --- Entropy of entanglement in pure states --- p.16, Chapter 2.3 --- Concurrence --- p.17, Chapter 2.4 --- Negativity --- p.19, Chapter 2.5 --- Other measurements --- p.20, Chapter 3 --- Entanglement in S=l/2 Ladder with Ring Exchange at T=0 --- p.22, Chapter 3.1 --- Model Hamiltonian and Phase Diagram --- p.22, Chapter 3.2 --- Ground-state concurrence --- p.24, Chapter 3.3 --- Two-site entanglement of the rung and the SU(4) point --- p.29, Chapter 3.4 --- Scaling behavior of the block-block entanglement --- p.34, Chapter 3.5 --- Entanglement of the Ferromagnetic state --- p.37, Chapter 3.6 --- Other Measurements --- p.42, Chapter 3.7 --- Summary and Discussion --- p.43, Chapter 4 --- Thermal Entanglement --- p.45, Chapter 4.1 --- A Four-Spin Plaquette --- p.46, Chapter 4.2 --- Thermal concurrence --- p.50, Chapter 4.3 --- Magnetic susceptibility as Entanglement Witness --- p.52, Chapter 4.4 --- Numerical results in a 6 x 2 ladder --- p.54, Chapter 4.5 --- Summary and Discussion --- p.55, Chapter 5 --- Conclusion and future work --- p.58, Bibliography --- p.60, http://library.cuhk.edu.hk/record=b5893045, Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Published
2006

12. The soybean plasma membrane-localized cation/H + exchanger GmCHX20a plays a negative role under salt stress.

Author

Jia Q, Li MW, Zheng C, Xu Y, Sun S, Li Z, Wong FL, Song J, Lin WW, Li Q, Zhu Y, Liang K, Lin W, and Lam HM

Subjects
Cations, Cell Membrane, Plant Proteins genetics, Salinity, Salt Stress, Salt Tolerance genetics, Glycine max genetics
Abstract

Cation/H + -exchanger (CHX) perform diverse functions in plants, including being a part of the protective mechanisms to cope with salt stress. GmCHX1 has been previously identified as the causal gene in a major salt-tolerance quantitative trait locus (QTL) in soybean, but little is known about another close paralog, GmCHX20a, found in the same QTL. In this study, GmCHX20a was characterized along with GmCHX1. The expression patterns of the two genes and the direction of Na + flux directed by overexpression of these two transporters are different, suggesting that they are functionally distinct. The ectopic expression of GmCHX20a led to an increase in salt sensitivity and osmotic tolerance, which was consistent with its role in increasing Na + uptake into the root. Although this seems counter-intuitive, it may in fact be part of the mechanism by which soybean could counter act the effects of osmotic stress, which is commonly manifested in the initial stage of salinity stress. On the other hand, GmCHX1 from salt-tolerant soybean was shown to protect plants via Na + exclusion under salt stress. Taken together these results suggest that GmCHX20a and GmCHX1 might work complementally through a concerted effort to address both osmotic stress and ionic stress as a result of elevated salinity., (© 2020 Scandinavian Plant Physiology Society.)

Published
2021
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