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| There are 149 papers published in subject: since this site started. | |||
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| 1. 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 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
| 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 | |||
| 2. How leaves dissipate diurnal excess energy of photosynthetic apparatus resulted from drought in the field-grown cotton | |||
| Ya-Li Zhang,Xiao-Ping Yi,He-Sheng Yao,Hong-Hai Luo,Ling-Gou,Wang-Feng Zhang | |||
Agronomy 20 November 2015
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| Abstract:To clarify the diurnal balance between the light energy conversion and theCO2 assimilation capacity under the drought, leaf gas exchange, chlorophyll fluorescence, leaf movement and leaf micro-environment during the day time were examined in the field-grown cotton (Gossypium hirsutum L.) and then we evaluated the partitioning of absorbed light energy and the distribution of photosynthetic electron flow. The results showed that leaf diaheliotropic movement was pronounced in all treatments, the incident PAR light and leaf temperature increased in the morning and decreased in the afternoon and drought significantly increased leaf temperature. The diurnal time course of ΦPSII decreased in the morning and increased in the afternoon, moderate drought was obviously lower than well-watered plants, but the predawn Fv/Fm showed no differences among three treatments. It means that moderate drought stress induced down-regulation of photosynthetic apparatus but not caused permanent damage of PSII. The diurnal time course of ΦNPQ showed a maximum between 14:00 and 16:00 hours, and the value was greatest in the moderate drought stressed plants. The diurnal time courses of the distribution of photosynthetic electron flow showed that the drought-induced decrease in the proportion of electron flux for photosynthetic carbon reduction was mostly compensated by the electron flux for the photorespiratory carbon oxidation and the alternative electron flux driven by Mehler-peroxidase reaction and cyclic electron transport around PSI or nitrate reduction. Therefore, we concluded that (1) active leaf diaheliotropic movement works well under drought can optimize the incident light available for photosynthetic apparatus; (2) cotton uses electron transport flux under mild drought whereas electron transport flux and regulated non-photochemical energy dissipation under moderate drought for excess light energy dissipation; (3) photosynthetic electron transport flux is insensitive to drought because of stronger alternative electron sinks in cotton. | |||
| TO cite this article:Ya-Li Zhang,Xiao-Ping Yi,He-Sheng Yao, et al. How leaves dissipate diurnal excess energy of photosynthetic apparatus resulted from drought in the field-grown cotton[OL].[20 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4660445 | |||
| 3. 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 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
| 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 | |||
| 4. Identification of different cytoplasms based on newly developed mitotype-specific markers for marker-assisted selection breeding in cultivated Brassica napus | |||
| HENG Shuangping,CHEN Fengyi,YANG Zonghui,HU Kaining,WEI Chao,WEN Jing,YI Bing,MA Chaozhi,TU Jinxing,SI Ping,FU Tingdong,SHEN Jinxiong | |||
Agronomy 30 September 2015
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| Abstract:Mitotype-specific markers have been developed in order to distinguish among different mitotypes in plant. Here, we comparatively analyzed six sequenced mitochondrial genomes that are studied in Brassica napus and identified the collinear blocks and mitotype-specific sequences (MSSs) of these mitochondrial genomes. The collinear relationship between mitochondrial genomes of nap, cam, and pol cytoplasmic male sterility (CMS) lines were higher than those of other lines. After comparative analysis of the six sequenced mitochondrial genomes (cam, nap, ole, pol CMS, ogu CMS, and hau CMS), 90 MSSs with sizes ranging from 101 to 9981 bp and a total length of 103,756 bp (accounting for 6.77% of the mitochondrial genome sequences) were identified. Additionally, 12 mitotype-specific markers were developed based on the mitochondrial genome specific sequences in order to distinguish among these different mitotypes. Cytoplasms of 570 different inbred lines collected from various scientific research institutes in China were identified using the MSS markers developed in our study. In addition to confirming the accuracy of the cytoplasmic identification, we also identified mitotypes that have not been reported in Brassica napus. Our study may provide guidance for the classification of different mitotypes in B. napus breeding. | |||
| TO cite this article:HENG Shuangping,CHEN Fengyi,YANG Zonghui, et al. Identification of different cytoplasms based on newly developed mitotype-specific markers for marker-assisted selection breeding in cultivated Brassica napus[OL].[30 September 2015] http://en.paper.edu.cn/en_releasepaper/content/4656522 | |||
| 5. iTRAQ -based quantitative proteomics analysis of upland cotton (Gossypium hirsutum) stem terminal buds reveals phytohormone related pathways associated with dwarfism | |||
| TU Xiaoju,WANG Qiming,LI Juan,LIU Aiyu | |||
| Agronomy 26 July 2015 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
| Abstract:Identifying important regulative elements and pathways related to dwarf in cotton is a major challenge in cotton breeding. An iTRAQ-based proteomics of stem terminal buds from the upland cotton species Gossypium hirsutum dwarf line LA-1 and high near-isogenic line （NIL） LH-1 was performed. Moreover, the transcriptional expression of differentially expressed proteins (DEPs) belonged to phytohormone signal transduction, hormone biosynthesis and ubiquitin system, were analyzed using the quantitative real-time polymerase chain reaction (PCR). A total of 4, 849 proteins were identified from LA-1 and LH-1, 697 of which showed differential accumulations. Most of DEPs function as catalytic activity, binding and transporter activity, and involved in metabolism and protein processing related pathways. In particular, 7 DEPs, including 2 of gibberellins (GA) receptor, 3 of cytokinin (CK) receptor, CK oxidase and CK-N-glucosyltransferase were up-regulated in LA-1, and gibberellin 20-oxidase was down-regulated in LA-1. Our results suggest that DELLA-independent GA signaling pathway is primary reason caused the dwarf in LA-1, and indicate that CRE1-2, GID, CKX and GA20ox are potential indicators of dwarf cotton, and the profiling of DEPs may offer a valuable resource for molecular markers of dwarf cotton breeding. | |||
| TO cite this article:TU Xiaoju,WANG Qiming,LI Juan, et al. iTRAQ -based quantitative proteomics analysis of upland cotton (Gossypium hirsutum) stem terminal buds reveals phytohormone related pathways associated with dwarfism[OL].[26 July 2015] http://en.paper.edu.cn/en_releasepaper/content/4650289 | |||
| 6. Elevation of arginine decarboxylase-dependent putrescine production enhances aluminum tolerance by decreasing aluminum retention in root cell walls of wheat | |||
| Yu Yan,Jin Chongwei,Sun Chengliang,Wang Jinghong,Ye Yiquan,Lu Lingli,Lin Xianyong | |||
| Agronomy 09 July 2015
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| Abstract:Aluminum (Al) stress induces putrescine (Put) accumulation in several plants and this response is proposed to alleviate Al toxicity. However, the mechanisms underlying this alleviation remain largely unknown. Here, we show that exposure to Al clearly increases Put accumulation in the roots of wheat plants (Triticum aestivum L. 'Xi Aimai-1') and that this was accompanied by significant increase in the activity of arginine decarboxylase (ADC), a Put producing enzyme. Application of an ADC inhibitor (D-arginine) terminated the Al-induced Put accumulation, indicating that increased ADC activity may be responsible for the increase in Put accumulation in response to Al. The D-arginine treatment also increased the Al-induced accumulation of cell wall polysaccharides and the degree of pectin demethylation in wheat roots. Thus, it elevated Al retention in cell walls and exacerbated Al accumulation in roots, both of which aggravate Al toxicity in wheat plants. The opposite effects were true for exogenous Put application. These results suggest that ADC-dependent Put accumulation plays important roles in providing protection against Al toxicity in wheat plants through decreasing cell wall polysaccharides and increasing the degree of pectin methylation, thus decreasing Al retention in the cell walls. | |||
| TO cite this article:Yu Yan,Jin Chongwei,Sun Chengliang, et al. Elevation of arginine decarboxylase-dependent putrescine production enhances aluminum tolerance by decreasing aluminum retention in root cell walls of wheat[J]. | |||
| 7. Effects of p-chlorophenoxyisobutyric acid, arabinogalactan, and activated charcoal on microspore embryogenesis in kale | |||
| Niu Ruiqing,Zhang Yun,Ren Jie,Tong Yan,Liu Zhiyong,Wang Yushu,Feng Hui | |||
| Agronomy 03 June 2015 | |||
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| Abstract:To improve embryogenesis in microspore cultures of kale (Brassica oleracea L. var. acephala DC.), 6-benzylaminopurine (6-BA), naphthaleneacetic acid (NAA), arabinogalactan (AG), p-chlorophenoxyisobutyric acid (PCIB), and activated charcoal (AC) were added to the medium using four varieties of kale. The results showed that the addition of AG (0.1-0.2 g/L), AC (0.1-0.2 g/L) or a combination of 6-BA (0.1-0.2 mg/L) and NAA (0.1-0.2 mg/L) promoted embryogenesis. Adding 40 μM PCIB or a combination of 40 μM PCIB and 0.2 g/L AC to NLN-13 medium at pH 5.8 effectively enhanced embryogenesis. Treatment with a combination of 40 μM PCIB and 10 mg/L AG gave the highest rate of embryonic induction, especially in genotype "Y007," which showed a twelve-fold increase in yield. | |||
| TO cite this article:Niu Ruiqing,Zhang Yun,Ren Jie, et al. Effects of p-chlorophenoxyisobutyric acid, arabinogalactan, and activated charcoal on microspore embryogenesis in kale[OL].[ 3 June 2015] http://en.paper.edu.cn/en_releasepaper/content/4646235 | |||
| 8. Mapping of Re, a gene conferring the red leaf trait in ornamental kale (Brassica oleracea L. var. acephala) | |||
| Ren Jie,Liu Zhiyong,Niu Ruiqing,Feng Hui | |||
| Agronomy 25 May 2015 | |||
| Show/Hide Abstract | Cite this paper︱Full-text: PDF (0 B) | |||
| Abstract:Variegated leaf color is an important agronomic trait that affects the market value of ornamental kale (Brassica oleracea L. var. acephala). The red leaf phenotype in kale is due to anthocyanin accumulation. To investigate the pattern of inheritance of this trait, we constructed an F2 population by crossing 'Y005-15', a double haploid with red leaves, with a white-leaved double haploid, 'Y011-13-38', followed by self-pollination. An F2 population consisting of 753 individuals was used to study the inheritance of this trait, which showed that the character was controlled by a dominate gene. All of the 185 white leaf trait plants in the F2 were used for mapping and developing markers linked to Re gene. Results showed that Re was mapped to a locus on linkage group C09 of Brassica oleracea, and the locus was mapped between three SSR markers (C9Z1, C9Z16-1 and C9Z96 ), with a genetic distance of 6.7, 1.0 and 2.1 cM from Re gene, respectively. Two codominant markers, namely, C9Z1 and C9Z96, are located on the same side of the gene while C9Z16-1 is on the other side. These results may facilitate marker-assisted selection of the red leaf trait in kale breeding as well as map-based cloning of the red leaf trait gene. | |||
| TO cite this article:Ren Jie,Liu Zhiyong,Niu Ruiqing, et al. Mapping of Re, a gene conferring the red leaf trait in ornamental kale (Brassica oleracea L. var. acephala)[OL].[25 May 2015] http://en.paper.edu.cn/en_releasepaper/content/4644219 | |||
| 9. 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 | |||
| 10. 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 | |||
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