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- 저자 : Xiaoxing Zhong (검색결과 2 건)
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A comprehensive gene network for fine tuning floral development in poplar
Zhong Chen,Xiaoyu Yang,Xiaoxing Su,Kai Gao,Pian Rao,Xinmin An 한국유전학회 2017 Genes & Genomics Vol.39 No.7
Herbaceous model species, especially Arabidopsis has provided a wealth of information about the genes involved in floral induction and development of inflorescences and flowers. While the genus Populus is an important model system for the molecular biology of woody plant. These two genuses differ in many ways. This study was designed to improve understanding of flower development in poplar at a system level, as its regulatory pathway to a large extent remains poorly known, owing to the presently limited mutant pool. To address this issue, a poplar GeneChip was employed to detect genes expressed during the whole floral developmental process. Using the expressed floral genes, a systematic gene network was constructed with the aid of functional association with Arabidopsis. The results suggested that autonomous, gibberellin, vernalization, photoperiod, ethylene, brassinosteroid, stress-induced and floral suppression pathways are involved in poplar flowering. Modularity analysis revealed several pathways in common with Arabidopsis, such as autonomous, gibberellin, vernalization and photoperiod pathways. In addition, brassinosteroid, stress-induced and floral suppression pathways were implicated as additional novel pathways. Notably, a difference in vernalization between Arabidopsis and poplar was revealed. Autonomous, gibberellin, vernalization, photoperiod, ethylene, brassinosteroid, stress-induced and floral suppression pathways integrated into a systematic gene network in floral development of poplar. Compared to Arabidopsis, brassinosteroid, stressinduced and floral suppression pathways are additional in poplar, and FLC is absent in vernalization pathway in poplar. Preliminary conclusions drawn here provide a basis for both identification of key genes and elucidation of molecular mechanisms involved in poplar floral development.
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Guolan Dou,Haihui Xin,Deming Wang,Botao Qin,Xiaoxing Zhong 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.5
In situ series diffuse reflectance FTIR was used to study the effects of poly(ethylene glycol) as a potentialchemical additive inhibiting coal oxidation process at low temperatures. Two coals with different volatile content and,different ash percentages were examined following treatment with 5 wt% poly(ethylene glycol) 200. The surfaces ofsamples both with and without the additive were analyzed at temperature up to 200 oC in air using in situ diffuse reflectanceFTIR. The results showed that poly(ethylene glycol) 200 is capable of inhibiting the oxidation of aliphaticmoieties such as methyl and methylene groups, and also reducing the quantity of surface hydroxyl groups through reactionsthat form more stable ether linkages, thus improving the thermal stability of the coal. A mechanism by whichthe additive interacts with the coal surfaces is proposed.
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