Puer University

Puer, China

Puer University

Puer, China

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Hu J.,Yunnan Academy of Agricultural Sciences | Zhang X.,Yunnan Academy of Agricultural Sciences | Jiang Z.,Puer University | Zhang F.,Yunnan Academy of Agricultural Sciences | And 3 more authors.
Mitochondrial DNA Part A: DNA Mapping, Sequencing, and Analysis | Year: 2017

The whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a cryptic species complex and widely distributed throughout tropical and subtropical regions. To understand the B. tabaci cryptic species diversity in China more comprehensively, in the year 2014 and 2016, a large-scale sampling was conducted from the famous biodiversity hotspot of China, Yunnan province. Mitochondrial cytochrome oxidase I gene sequences were used to identify new putative cryptic species. Phylogenetic analyses were performed using Bayesian methods to evaluate the position of new cryptic species in the context of the B. tabaci diversity in Asia. Two new cryptic species, China 5 and Asia V were identified. In total, 19 B. tabaci cryptic species are present in China, two invasive (MED and MEAM1) and 17 indigenous. A new sibling species of B. tabaci was first defined and reported. Based on the mtCOI sequences and haplotype network analyses, the genetic diversity of MED was far higher than MEAM1. We confirmed the exotic MED was originated from the western Mediterranean regions and first invaded into Yunnan, China. The genetic structures of other four indigenous species (Asia I, Asia II 1, Asia II 6, and China 1) with relatively wide distribution ranges in China were also discussed. © 2017 Informa UK Limited, trading as Taylor & Francis Group


Liu J.,Qujing Normal University | Luo H.-Y.,Qujing Normal University | Guo Y.-Y.,Yunnan University | Wu B.,Puer University
Applied Mechanics and Materials | Year: 2014

This paper uses the Lyapunov method to study the control system of a class of two-dimensional critical, and acquires the sufficient condition for absolute stability of the two-dimensional critical nonlinear control system. © (2014) Trans Tech Publications, Switzerland.


Wang J.-J.,Puer University | Wang J.-J.,Northwest University, China
Dalian Ligong Daxue Xuebao/Journal of Dalian University of Technology | Year: 2016

DGH equation is an important nonlinear wave equation and has broad application prospect. Numerical method for the equation is studied based on the multi-symplectic theory in Hamilton system. The average vector field (AVF) method is used to discretize the Hamilton system, and local energy structure-preserving algorithm and local momentum structure-preserving algorithm are constructed to solve the DGH equation. The numerical examples show that the two kinds of structure-preserving algorithms have good long-time numerical stability. © 2016, Editorial Office of Journal of Dalian University of Technology. All right reserved.


Luo Y.L.,Puer University | Su Z.L.,Puer University | Cui X.L.,Puer University | Lan Q.Y.,CAS Xishuangbanna Tropical Botanical Garden
Israel Journal of Plant Sciences | Year: 2015

Different plants and plant organs have various strategies to cope with drought stress. Kalanchoe tubiflora plants have a strong ability to prevent water loss and to scavenge reactive oxygen species. The epiphyllous bud of the plant serves as a reproduction unit and is able to generate plantlets even under conditions of extreme drought. The aim of this project was to study the antioxidant-stress response and osmoregulation of K. tubiflora epiphyllous buds to dehydration and to compare the drought-tolerance mechanisms of the plant body and the epiphyllous buds. With the progression of bud dehydration, relative water content, seedling survival rate and dry weight per seedling decreased, and electrolyte leakage, hydrogen peroxide and malondialdehyde content and superoxide anion production rate increased. The activities of the antioxidant enzymes superoxide dismutase, catalase, ascorbate peroxidase, dehydroascorbate reductase and glutathione reductase decreased under dehydration. The content of proline, soluble sugars and soluble protein increased in dehydrated buds proportionally with the extent of water loss. These data indicate that the drought-tolerance mechanism of the K. tubiflora bud was different from that of its mother plant. The buds invest more energy to prevent water loss during drought stress, and their antioxidant defense weakens. © 2015 Taylor & Francis.


Jia Z.-L.,Yuxi Normal University | Li K.-Y.,Yuxi Normal University | Li C.,Puer University | Yang C.-Y.,Yuxi Normal University | Mei D.-C.,Yunnan University
European Physical Journal B | Year: 2015

The transport properties of an inertial Brownian motor were numerically studied in the presence of recycled noise, which is obtained by re-injecting a fraction of the primary white noise after a processing time, being introduced into the system in a multiplicative way. The simulation results indicate that various parameters such as the external driving force, the friction coefficient, the mass of the particle, the recycling strength, and the delay time can induce the current reversal phenomenon when the sign of the recycling strength is in agreement with the sign of the external bias force, otherwise the current reversal cannot be observed. Additionally, the asymptotic mean velocity as a function of the delay time of the recycled noise always shows a resonance-like behavior with the presence of a maximum current. These results demonstrate that the delay time and the recycling strength of the recycled noise can be used as the feasible and flexible control parameters for the amplitude and direction of the current. © 2015, EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Zhu P.,Puer University | Mei D.C.,Yunnan University
European Physical Journal B | Year: 2014

An autonomous stochastic system with nonlinear time-delayed feedback is investigated employing the stochastic simulation method. In the autonomous stochastic system with quadratic time-delayed feedback or under positive feedback, the nonlinear delay time fails to possess the role improving the noisy state of the system. In the autonomous stochastic system with cubic time-delayed feedback and under negative feedback, the nonlinear delay time can improve the noisy state, tuning the signal output, and generating incoherence and coherence maximization. We reveal a new kind of anti-coherence and coherence resonance phenomena induced by the nonlinear time delay in the autonomous stochastic system without external periodic force, discussing further the effects of the noise strength, the control parameter, and the feedback strength on anti-coherence and coherence resonance. © 2014 EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg.


Lan H.,Xi'an Jiaotong University | Lan H.,PuEr University | Li C.,Xi'an Jiaotong University | Lei C.,Xi'an Jiaotong University | And 5 more authors.
Laser Physics Letters | Year: 2015

We report the competition between the spontaneous parametric four-wave mixing and second- or fourth-order fluorescence (FL) signals in Pr3+:Y2SiO5 crystal. By changing the powers of controlling fields and blocking different fields, the competitive two signals can be identified through the dressing effect. Meanwhile, the delay of fourth-order FL in the time domain results from splitting the energy level. Such results can find potential applications in optical information storage and processing on a photonic chip. © 2015 Astro Ltd.


Zhu P.,Puer University | Mei D.C.,Yunnan University
Physica A: Statistical Mechanics and its Applications | Year: 2014

The auto-correlation function and the cross-correlation function of an autonomous stochastic system with time delays are investigated. We obtain the distribution curves of the auto-correlation function Cx(s) and Cy(s), and the cross-correlation function Cxy(s) and Cyx(s) of the stochastic dynamic variables by the stochastic simulation method. The delay time changes prominently the behaviors of the dynamical variables of an autonomous stochastic system, which makes the auto-correlation and the cross-correlation of the autonomous stochastic system alternate oscillate periodically from positive to negative, or from negative to positive, decrease gradually, and finally tends to zero with the decay time. The delay time and the noise strength have important impacts for the auto-correlation and the cross-correlation of the autonomous stochastic delay system. The delay time enhances the auto-correlation and the cross-correlation, on the contrary, the noise strength lowers the auto-correlation and the cross-correlation. Under the time delay, by comparison we further show differences of the auto-correlation and the cross-correlation between the dynamical variables x and y. © 2014 Published by Elsevier B.V.


Hu J.,Yunnan Academy of Agricultural Sciences | Jiang Z.-L.,Puer University | Nardi F.,University of Siena | Liu Y.-Y.,Yunnan Academy of Agricultural Sciences | And 3 more authors.
Journal of insect science (Online) | Year: 2014

Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a cryptic species complex that includes some of the most significant pests of agriculture and horticulture worldwide. To understand the diversity and distribution of B. tabaci cryptic species in Yunnan, a famous biodiversity hotspot in China, a large-scale sampling was conducted from year 2010 to 2013 in 10 prefectures. Mitochondrial cytochrome oxidase I gene sequences were used to identify different cryptic species. Phylogenetic analyses were performed using Bayesian methods to assess the position of a new B. tabaci cryptic species in the context of the B. tabaci diversity in Asia. The survey indicates at least eight B. tabaci cryptic species are present in Yunnan, two invasive (MEAM1 and MED) and six indigenous (China 2, China3, China 4, Asia I, Asia II 1, and Asia II 6), MEAM1, MED, and Asia I being the three predominant cryptic species in Yunnan. Compared with MEAM1, MED has a wider distribution. Based on molecular data, a new cryptic species, here named China 4, was identified that appears to be related to China 1, China 2, and China 3. Future efforts should focus on the interactions between predominant B. tabaci cryptic species and begomoviruses and on the development of effective control strategies. © The Author 2014. Published by Oxford University Press on behalf of the Entomological Society of America.


PubMed | Puer University, Plant Protection and Quarantine Station of XiShuangBanNa State, Yunnan Academy of Agricultural Sciences, University of Siena and Plant Protection and Quarantine Station of Jinghong City
Type: | Journal: Journal of insect science (Online) | Year: 2014

Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is a cryptic species complex that includes some of the most significant pests of agriculture and horticulture worldwide. To understand the diversity and distribution of B. tabaci cryptic species in Yunnan, a famous biodiversity hotspot in China, a large-scale sampling was conducted from year 2010 to 2013 in 10 prefectures. Mitochondrial cytochrome oxidase I gene sequences were used to identify different cryptic species. Phylogenetic analyses were performed using Bayesian methods to assess the position of a new B. tabaci cryptic species in the context of the B. tabaci diversity in Asia. The survey indicates at least eight B. tabaci cryptic species are present in Yunnan, two invasive (MEAM1 and MED) and six indigenous (China 2, China3, China 4, Asia I, Asia II 1, and Asia II 6), MEAM1, MED, and Asia I being the three predominant cryptic species in Yunnan. Compared with MEAM1, MED has a wider distribution. Based on molecular data, a new cryptic species, here named China 4, was identified that appears to be related to China 1, China 2, and China 3. Future efforts should focus on the interactions between predominant B. tabaci cryptic species and begomoviruses and on the development of effective control strategies.

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