Liu Y.,Southwest forestry University
Plant Cell Reports | Year: 2012
Abscisic acid (ABA) is a universal hormone in higher plants and plays a major role in various aspects of plant stress, growth, and development. Mitogen-activated protein kinase (MAPK) cascades are key signaling modules for responding to various extracellular stimuli in plants. The available data suggest that MAPK cascades are involved in some ABA responses, including antioxidant defense, guard cell signaling, and seed germination. Some MAPK phosphatases have also been demonstrated to be implicated in ABA responses. The goal of this review is to piece together the findings concerning MAPK cascades in ABA signaling. Questions and further perspectives of the roles played by MAPK cascades in ABA signaling are also furnished. © 2011 Springer-Verlag.
Gao W.,Southwest forestry University
Iranian Polymer Journal (English Edition) | Year: 2012
The effect of typical wood composite preservatives, ammonium pentaborate (APB), nanosize copper oxide and basic copper carbonate, on the cure characteristics of phenol formaldehyde (PF) resin in the presence of wood was evaluated by solid-state 13C nuclear magnetic resonance with cross-polarization and magic angle spinning (CP/MAS). With the introduction of APB the absorption intensity and peak area of PF resin at 129.5 ppm was reduced, and the carbons in methylene bridges shifted from 65.8 to 73.5 ppm, which were the result of hydrogen bond formation between ammonium in APB and oxygen of phenolic hydroxyl, as well as coordination bond between the boron in APB and oxygen in phenolic hydroxyl and/or unreacted hydroxymethyl. In addition, the peak area at 152.7 ppm increased with the addition of poplar powder for the overlap of cellulose, hemicellulose, and lignin chemical shifts with the active groups in PF resin. However, the connection status of critically active chemical groups of condensed polymer structure in cured PF resin such as the existence of phenolic ring, phenolic hydroxyl, methylene bridges, and hydroxymethyl linkage are unchanged. Combined with relative increase in the amount of carbon in methylene bridges from 2.42 to 2.56, drop in number of carbons of unreacted hydroxyls from 1.19 to 1.07, and the reported increase in physical and mechanical properties, the nanosize copper oxide improved the curing degree of PF. Furthermore, the similar analysis indicated that basic copper carbonate delayed the curing degree of PF. © Iran Polymer and Petrochemical Institute 2012.
Luo Y.,CAS Xishuangbanna Tropical Botanical Garden |
Guo Z.,Plant Germplasm and Genomics Center |
Li L.,Southwest forestry University
Developmental Biology | Year: 2013
MicroRNAs (miRNAs) are post-transcriptional regulators of growth and development in both plants and animals. Flowering is critical for the reproduction of angiosperms. Flower development entails the transition from vegetative growth to reproductive growth, floral organ initiation, and the development of floral organs. These developmental processes are genetically regulated by miRNAs, which participate in complex genetic networks of flower development. A survey of the literature shows that miRNAs, their specific targets, and the regulatory programs in which they participate are conserved throughout the plant kingdom. This review summarizes the role of miRNAs and their targets in the regulation of gene expression during the floral developmental phase, which includes the floral transition stage, followed by floral patterning, and then the development of floral organs. The conservation patterns observed in each component of the miRNA regulatory system suggest that these miRNAs play important roles in the evolution of flower development. © 2013 Elsevier Inc.
Allendorf T.D.,University of Wisconsin - Madison |
Yang J.,Southwest forestry University
Biological Conservation | Year: 2013
Finding common ground between local residents' livelihoods and the conservation of protected areas in developing countries has been considered a challenge. Recently, ecosystem services have been used as a framework to understand the benefits that protected areas provide local residents. In this study, we explore the role of ecosystem services in residents' relationships with Gaoligongshan Nature Reserve (GNR) in Yunnan, China. GNR is located in a biodiversity hotspot and in an area that has been affected severe droughts. Results show that the majority of people recognize ecosystem services as benefits from GNR, particularly regulating services such as the provision of water. Respondents who perceived regulating services were more likely to be older, male, of Yi ethnicity, more educated, and grow sugarcane but not corn. However, controlling for residents' knowledge about GNR, the effects of gender, age, and education decrease or disappear, while ethnicity and agricultural crops grown remain significant. This study demonstrates that people recognize common ground between their livelihoods and GNR and suggests that people's knowledge about GNR, cultural context, and agricultural experiences influence their appreciation of ecosystem services from GNR. This study highlights that protected area conservation, if conducted with awareness of people's already-existing perceptions of benefits, can begin with a discussion of win-win scenarios. © 2013 Elsevier Ltd.
Li X.,Southwest forestry University |
Deng S.,Southwest forestry University |
Xie X.,Yunnan University
Corrosion Science | Year: 2014
The inhibition effect of three oxime compounds of acetone oxime (AO), 2-butanone oxime (BO) and cyclohexanone oxime (CO) on the corrosion of aluminium in HCl solution was studied by weight loss, potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS), quantum chemical calculation and molecular dynamics (MD) simulation methods. The results show that all oxime compounds are good inhibitors, and inhibition efficiency follows the order: CO. >. BO. >. AO. The adsorption of each inhibitor on aluminium surface obeys Langmuir adsorption isotherm. All these oxime compounds act as cathodic inhibitors. The probable inhibitive mechanism is proposed from the viewpoint of adsorption theory. © 2014 Elsevier Ltd.