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1. Influence of environmental factors on the occurrence of false smut on rice cultivar Wanxian 98 | |||
LIN Yang,WU Weigang,JIANG Xuxiang,WANG Fei,LUO Chaoxi | |||
Agronomy 16 June 2017 | |||
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Abstract:In order to obtain a more comprehensive understanding of epidemiology of rice false smut, the occurrence of false smut on rice cultivar Wanxian 98 was investigated under different environmental conditions. Results demonstrated that sowing dates significantly affected the occurrence of false smut on cultivar Wanxian 98. Regression analysis indicated that both the higher relative humidity 3 days before heading and lower relative humidity 3 weeks after heading of rice cultivar Wanxian 98 could increase the occurrence of this disease. This is the first report which shows the correlation between occurrence of rice false smut and meteorological factors in experimental fields. In the present study, the increased planting density did not lead to increased severity of rice false smut on rice cultivar Wanxian 98, suggesting that the influence of planting density on the occurrence of false smut might be cultivar specific. The increased planting density has potential risks to increase the severity of rice false smut on cultivars with lower tillering ability rather than on higher tillering cultivars. The enhanced nitrogen application in the early stage did not increase the severity of rice false smut on rice cultivar Wanxian 98, suggesting that nitrogen still can be applied at the early stage of rice growth even under false smut pressure. | |||
TO cite this article:LIN Yang,WU Weigang,JIANG Xuxiang, et al. Influence of environmental factors on the occurrence of false smut on rice cultivar Wanxian 98[OL].[16 June 2017] http://en.paper.edu.cn/en_releasepaper/content/4737715 |
2. The genus Cratospila Foerster (Hymenoptera: Braconidae: Alysiinae) in China, with two newly recorded species | |||
Yao Junli,Cornelis van Achterberg,Chen Jiahua | |||
Agronomy 30 May 2016 | |||
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Abstract:Cratospila F?rster is a small genus in Alysiini (Hymenoptera: Braconidae: Alysiinae). Two species of the genus Cratospila Foerster (C. tricolor Telenga and C. neocirce Wharton) are newly reported from China and a key to the Chinese species is given. The Nearctic C. neocirce Wharton 1980, is reported for the first time from the Palaearctic Region. | |||
TO cite this article:Yao Junli,Cornelis van Achterberg,Chen Jiahua. The genus Cratospila Foerster (Hymenoptera: Braconidae: Alysiinae) in China, with two newly recorded species[OL].[30 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4692915 |
3. A novel strategy to enhance resistance to Cucumber mosaic virus in tomato by grafting to transgenic rootstocks | |||
BAI Miao,CHEN Wenting,XIE Bingyan,YANG Guoshun | |||
Agronomy 11 May 2016 | |||
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Abstract:Cucumber mosaic virus (CMV) can infect a wide range of host species. For the lacking of CMV-resistant varieties of tomato, RNA interference can be used as a fast and effective method for the generation of transgenic resistant varieties. In this current study, five intron-spliced hairpin RNA (ihpRNA) plant expression vectors aim at five genes of CMV has been constructed. Transgenic tomatoes were obtained by Agrobacterium mediated transformation with expression vectors. Highly resistant generations of transgenic plants were employed as rootstocks and grafted onto non-transgenic tomatoes that resulted in the successful transfer of resistance to the scions. Using a novel method of plant cuttings for rootstock propagation, we obtained large quantities of disease-resistant material. Further, this method produces scions that can remain undetectable for transgenic resistance marker genes that may provide novel approaches to evade collective concerns about genetically-modified organism (GMO) biosafety. | |||
TO cite this article:BAI Miao,CHEN Wenting,XIE Bingyan, et al. A novel strategy to enhance resistance to Cucumber mosaic virus in tomato by grafting to transgenic rootstocks[OL].[11 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4687477 |
4. Characterization and function of Tomato yellow leaf curl virus-derived small RNAs generated in tolerant and susceptible tomato varieties | |||
BAI Miao,YANG Guoshun,LIN Runmao,CHEN Wenting,LING Jian,Mao Zhenchuan,XIE Bingyan | |||
Agronomy 11 May 2016 | |||
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Abstract:Virus-tolerant plant, which allows the accumulation of virus and then generate virus-derived small RNAs (vsRNAs), valuable materials to reveal the antiviral efficiency of vsRNAs. Here, a comparison of vsRNAs in Tomato yellow leaf curl virus tolerant and in susceptible tomato varieties showed the consistent trend of vsRNAs' distribution on virus genome, which is presented as an obvious characteristic. However, the expression level of vsRNA in tolerant variety is less than that in susceptible variety. Slicing targets of vsRNA-mediated viral transcripts were investigated using parallel analysis of RNA ends, and geminivirus DNA methylation was determined by bisulfite sequencing, which uncovered that not all vsRNAs participated in viral mRNA degradation and DNA methylation. Additionally, by comparing with the expression pattern of vsRNAs, viral DNA and mRNA, we proposed the quantity of vsRNAs is corresponding to the expression level of viral mRNA, while the virus-suppression of vsRNAs is not high-efficient. | |||
TO cite this article:BAI Miao,YANG Guoshun,LIN Runmao, et al. Characterization and function of Tomato yellow leaf curl virus-derived small RNAs generated in tolerant and susceptible tomato varieties[OL].[11 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4687558 |
5. NbLRK1, an INF1 interact protein, involve in defense response against Phytophthora infestans. | |||
Shao Fang,Wang Haixia,Tian Zhejuan,Tian Zhendong | |||
Agronomy 04 December 2015 | |||
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Abstract:INF1 is an extracellular protein secreted by the oomycete Phytophthora infestans, the causal agent of late blight disease in potato. INF1 triggers a wide range of defense responses in most Nicotiana species. Previous studies have shown that INF1 interact with a B-lectin-like receptor kinase, NbLRK1, suggesting that NbLRK1 is a component of the N. benthamiana protein complex that recognizes INF1 elicitor and transduces the HR signal. In this study, functions of NbLRK1 in late blight resistance and in INF1 mediated HR were further investigated. Our results confirmed that silencing of NbLRK1 delayed INF1-mediated HR in N. benthamiana. Silencing of NbLRK1 in N. benthamiana enhances susceptibility to P. infestans accompanied by reduced deposition of H2O2 response to INF1 induction. The N. benthamiana SERK3/BAK1 protein maybe interact with NbLRK1 at the membrane in planta suggesting INF1, NbLRK1 and NbSERK3/BAK1 form a complex to manipulate PTI in N. benthamiana. | |||
TO cite this article:Shao Fang,Wang Haixia,Tian Zhejuan, et al. NbLRK1, an INF1 interact protein, involve in defense response against Phytophthora infestans.[OL].[ 4 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668879 |
6. Potato U-BOX E3 ubiquitin ligase StPUB17 positively regulates the basal immunity against Phytophthora infestans | |||
He Qin,Chen Yanlin,Wang Haixia,Tian Zhendong | |||
Agronomy 03 December 2015 | |||
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Abstract:The oomycete pathogen Phytophthora infestans is the causal agent of the late blight disease. Previous StPUB17 was showed to be significantly induced by P. infestans, suggesting it might play a role in the immunity against P.infestans. However, the function of StPUB17 in potato disease defense is unknown. Here, Silencing StPUB17 in potato by RNAi leaded to the enhanced P.infestans colonization, while overexpressing StPUB17 in potato resulted in the reduced P.infestans colonization and showed an enhanced resistance correlated with callose and H2O2 accumulation, potentially suggesting that the E3 ubiquitin ligase StPUB17 may be a positive role in the basal immunity against P.infestans. | |||
TO cite this article:He Qin,Chen Yanlin,Wang Haixia, et al. Potato U-BOX E3 ubiquitin ligase StPUB17 positively regulates the basal immunity against Phytophthora infestans[OL].[ 3 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668778 |
7. Synergistic relationships between rice landrace and soil microbial diversity in the Yuanyang terraces of Yunnan Province (P.R. China) | |||
Yang Genhua,Fang Fei,He Xiahong,Yang Jing,Liu Ling,Su Youbo,Bao Wenjing,Michael A. Fullen,Li Chengyun | |||
Agronomy 10 November 2015 | |||
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Abstract:Microbial communities are critical for the stability and productivity of agro-ecosystems. Understanding the diversity, dynamics and functions of soil microbial populations is essential to improve agricultural productivity. Using Biolog-Eco technology, we studied relationships between rice varieties and the diversity of soil microbial communities in the Yuanyang rice terrace system OF Yunnan Province, China. Soil samples were collected at pre-transplantation and post-harvest of rice. Results showed that: 1) before transplanting rice, the Shannon and McIntosh indices of soil microbial communities did not differ significantly in fields planted with landraces and modern varieties, but significantly differed after one production season; 2) years of continuous cultivation of landraces resulted in high soil microbial background diversity values, and further improved the positive impact of landraces on soil microbial populations; 3) rice cultivation enhanced the ability of soil microbes to metabolize carbon; and 4) long-term cultivation of rice landraces was more effectively increase the microbe diversity and soil organic matter (SOM) than modern varieties. Grain yield and straw biomass of landraces exhibited less variation with altitude, which implied positive effects of soil microbial community on rice productivity. These results suggest that these rice landraces had better synergistic relationships with soil microbes, increase the diversity and keep the balance of organic materials in the field. Results imply that rice landraces have better synergistic relationships with local soil microbes, and soil microbial populations, as integral components of the terrace system, play crucial roles in the effective conservation of natural resources and thus contribute to sustainable development. | |||
TO cite this article:Yang Genhua,Fang Fei,He Xiahong, et al. Synergistic relationships between rice landrace and soil microbial diversity in the Yuanyang terraces of Yunnan Province (P.R. China)[OL].[10 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4660962 |
8. Population genetic analysis reveals cryptic sex in the phytopathogenic fungus Alternaria alternata | |||
Meng Jingwen,Zhu Wen,He Menghan,Wu Ejiao,Duan Guohua,Jin Yujia,Shang Liping,Zhan Jiasui | |||
Agronomy 20 May 2015 | |||
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Abstract:Reproductive mode can impact population genetic dynamics and evolutionary landscape of plant pathogens as well as on disease epidemiology and management. In this study, we monitored the spatiotemporal dynamics and mating type idiomorphs in ~700 Alternaria alternata isolates sampled from the main potato production areas in China, between 2011 and 2013 to infer the mating system of this emerging disease. Consisting with the expectation of asexual species, identical genotypes were recovered from different locations separated by hundreds of kilometers of geographic distance and spanned across many years. However, high genotype diversity, equal frequency of MAT1-1 and MAT1-2 within and among populations, no genetic differentiation and phylogenetic association between the isolates from the two mating types, combined with random association amongst neutral markers in some field populations, suggest that sexual reproduction may also play important roles in the epidemics and evolution of the pathogen in at least some regions though no teleomorphs have been observed yet naturally or artificially. Our results indicate that A. alternata may adopt an epidemic mode of reproduction by combining many cycles of asexual propagation with fewer cycles of sexual reproduction, facilitating its adaptation to changing environments and making control more difficult in agriculture. | |||
TO cite this article:Meng Jingwen,Zhu Wen,He Menghan, et al. Population genetic analysis reveals cryptic sex in the phytopathogenic fungus Alternaria alternata[OL].[20 May 2015] http://en.paper.edu.cn/en_releasepaper/content/4644509 |
9. Temporary inhibition of station-keeping response to light in migratory rice planthoppers | |||
Hai-Bo YANG,Gao HU,Fan FANG,Baoping ZHAI | |||
Agronomy 07 March 2015 | |||
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Abstract:This study aims to determine whether or not migratory rice planthoppers [Sogatella furcifera (Horváth) and Nilaparvata lugens] temporarily inhibit their station-keeping response to light during migration and to elucidate whether or not these insects respond to light traps located in their native habitat. Results of mark-release-recapture experiments revealed that the overall recapture rate was very low (0.028%) and that almost all emigrating macropterous adults did not respond to local light traps. The population dynamics of planthoppers under light traps were not synchronous with that in paddy fields. The peaks of planthoppers caught by light traps appeared when the low-level wind jets at 850 hPa isobaric surfaces, and these catches were almost immigrants from distant places. The macropterous planthopper adults in the field can be passively dispersed when their take-off was suppressed by precipitation and then would respond to light traps at night. These results show that migrating planthoppers are not distracted by light traps in their native habitat. This study provided interpretation for the definition of migratory behaviour. | |||
TO cite this article:Hai-Bo YANG,Gao HU,Fan FANG, et al. Temporary inhibition of station-keeping response to light in migratory rice planthoppers[OL].[ 7 March 2015] http://en.paper.edu.cn/en_releasepaper/content/4633549 |
10. NbDREPP Contributes to Potyvirus Movement and Transports to Plasmodesmata via the Early Secretory Pathway and the Actomyosin System | |||
GENG Chao,CONG Qianqian,LI Xiangdong,MOU Anli,GAO Rui,LIU Jinliang,TIAN Yanping | |||
Agronomy 13 January 2015 | |||
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Abstract:To identify the host factor interacting with P3N-PIPO of Tobacco vein banding mosaic virus (TVBMV), yeast two hybrid, bimolecular fluorescence complementary and co-immunoprecipitation assays were performed in this study. The host factor NbDREPP was identified to interact with TVBMV P3N-PIPO. The knockdown of NbDREPP gene expression in N. benthamiana impeded the cell-to-cell movement of TVBMV. NbDREPP was shown to co-localize with TVBMV P3N-PIPO and CI at plasmodesmata (PD) and traffick to PD via the early secretory pathway and the actomyosin motility system. And myosin XI-2 is specially required for transporting NbDREPP to PD. In conclusion, NbDREPP is a key host protein within the early secretory pathway and the actomyosin motility system that interacts with two movement proteins and influences virus movement. | |||
TO cite this article:GENG Chao,CONG Qianqian,LI Xiangdong, et al. NbDREPP Contributes to Potyvirus Movement and Transports to Plasmodesmata via the Early Secretory Pathway and the Actomyosin System[J]. |
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