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Analysis of the meiosis in the F_1 hybrids of Longiflorum × Asiatic(LA) of lilies(Lilium) using genomic in situ hybridization

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Journal of Genetics and Genomics 2008年第11期35卷 687-695页

作者： Shujun Zhou Munikote S. Ramanna Richard G.E Visser Jaap M. van Tuyl Institute of Landscape College of Agriculture ＆ Biotechnology Zhejiang University Hangzhou 310029 China Plant Breeding lab Wageningen University P.O. Box 386 6700 AJ Wageningen The Netherlands

Longiflorum and Asiatic lilies of the genus Lilium of the family Liliaceae are two important groups of modem lily cultivars. One of the main trends of lily breeding is to realize introgression between these groups. With cut style pollination and embryo rescue, distant hybrids between the two groups have been obtained. However, the FI hybrids are highly sterile or some of them could produce a small number of 2n gametes, and their BC1 progenies are usually triploids. Dutch lily breeders have selected many cultivars from these BC1 progenies based on their variation. It is presumably suggested that such variation could be caused by intergenomic recombination and abnormal meiosis during gamete formation in F1 hybrids of Longiflorum × Asiatic （LA） hybrids in Lilium. Therefore, the meiotic process of ten F1 LA hybrids was cytologically investigated using genomic in situ hybridization and traditional cytological methods in the present research. The results showed that： at metaphase I, the homoeologous chromosome pairing among different F1 hybrids ranged from 2.0 to 11.4 bivalents formed by homoeologous chromosomes per pollen mother cell （PMC）, and very few multivalents, and even very few bivalents were formed by two chromosomes within one genome rather than homoeologous chromosomes in some PMCs; at anaphase I, all biva- lents were disjoined and most univalents were divided. Both the disjoined bivalents （half-bivalents） and the divided univalents （sister chromatids） moved to the opposite poles, and then formed two groups of chromosomes; because the two resulting half-bivalents retained their axes in the cell undisturbed, many crossover types, including single crossovers, three strand double crossovers, four strand double crossovers, four strand triple crossovers, and four strand multiple crossovers between the non-sister chromatids in the tetrads of bivalents, were clearly inferred by analyzing the breakpoints on the disjoined bivalents. The present investigation not only ex

关键词： Lilium genomic in situ hybridization abnormal meiosis crossover 2n gamete

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seed-assisted growth for high-performance perovskite solar cells:A review

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Journal of Energy Chemistry 2024年第9期96卷 588-610页

作者： Zhimin Fang Ting Nie Jianning Ding Shengzhong(Frank)Liu Institute of Technology for Carbon Neutralization Yangzhou UniversityYangzhou 225127JiangsuChina Dalian National laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Key laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

The rapid increase in the power conversion efficiency(PCE)of perovskite solar cells(PSCs)is closely related to the development of deposition techinique for perovskite *** high-quality perovskite film enables efficient charge transportation and less trap states,which are eventually translated into enhanced device ***-assisted growth(SAG)is a potential technique for depositing highly-crystallized perovskite films with preferential crystal orientation among the numerous approaches related to crystallization *** this review,we summarize the recent advances in the SAG technique for both one-step and two-step processed perovskite ***,seeding at the buried interface and on the top surface are also *** present different seeds and their corresponding seeding mechanism in detail,such as inorganic nanomaterials,organic ammoniums,alkali metal halides,and perovskite ***,challenges and perspectives are proposed to investigate the potential expansion of seeding engineering in high-performance PSCs,particularly large-area devices.

关键词： Perovskite solar cell seed Crystallization Efficiency

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Root Zonation:New Molecular Insights

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Molecular Plant 2020年第9期13卷 1236-1236页

作者： Bing Bai wageningen seed Science Centre Laboratory of Plant PhysiologyWageningen University6708 PB Wageningenthe Netherlands

In Arabidopsis,once seeds germinate,a group of cells constituting the stem cell niche at the root apex become activated and undergo division and differentiation to form root meristem and three different zones of root tissues,i.e.,the division,elongation,and differentiation zones(Figure 1).The positioning of the so-called transition zone(TZ)between the division and elongation zone involves a complex regulatory network governed by auxin and cytokinin signaling,both of which safeguard the correct patterning of root zonation.

关键词： Root Figure Molecular

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Conditions and Stimulation for Germination in Glycyrrhiza uralensis Fisch seeds

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Agricultural Sciences in China 2008年第12期7卷 1438-1444页

作者： MAO Pei-sheng WANG Yu-hong WANG Xin-guo LIAN Jia-jie HUANG Ying Forage seed lab China Agricultural University Beijing 100193 P.R.China

Evaluation of seed quality is the key to seed distributing and seeding of Glycyrrhiza uralensis Fisch, as an important species for pharmacy and soil conservation. Here, we study the effects of light and temperature on seed germination and mechanical and chemical scarification on breaking the seed coat. seeds were collected in 2004, 2005, and 2006, placed in Petri dishes, and incubated at constant temperature 20, 25, and 30℃, and alternating temperature 15-25, 20-30, 15-30, and 20-35℃ under either an 8h photoperiod or total darkness for 28 consecutive days. Different methods were used to break the dormancy owing to hard seededness in this species such as chemical scarification by immersing in concentrated sulphuric acid for 5, 10, 15, 20, 25, 30, 45, and 60 min, in 0.2% KNO3 solution to saturate the seedbed, and prechilling for 7 d at 7℃ and mechanical scarification by cutting. The results showed that alternating temperature at 20-30℃ with 8 h photoperiod and 16 h darkness was optimum for G. uralensis seed germinating in the laboratory. Hard seeds were broken by concentrated sulphuric acid soaking or mechanical scarification by cutting. Germination of seeds harvested in two different years was both promoted by immersing for 30-45 min in concentrated sulphuric acid. KNO3 solution was ineffective for reducing hard seeds. During seed germinating, the first count was on the 7th day and the last count was on the 14th day.

关键词： seed germination seed hardness seed scarification Glycyrrhiza uralensis

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Unraveling the skatole biodegradation process in an enrichment consortium using integrated omics and culture-dependent strategies

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Journal of Environmental Sciences 2023年第5期127卷 688-699页

作者： Qiao Ma Nan Meng Jiancheng Su Yujie Li Jiazheng Gu Yidi Wang Jingwei Wang Yuanyuan Qu Zelong Zhao Yeqing Sun Institute of Environmental Systems Biology College of Environmental Science and EngineeringDalian Maritime UniversityDalian 116026China Liaoning Key lab of Germplasm Improvement and Fine seed Breeding of Marine Aquatic Animals Liaoning Ocean and Fisheries Science Research InstituteDalian 116023China Key laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

3-Methylindole(skatole)is regarded as one of the most offensive compounds in odor *** is feasible for skatole removal but the functional species and genes responsible for skatole degradation remain *** this study,an efficient aerobic skatole-degrading consortium was *** and Pseudomonas were identified as the two major and active populations by integrated metagenomic and metatranscriptomic *** analyses indicated that the skatole downstream degradation wasmainly via the catechol pathway,and upstream degradation was likely catalyzed by the aromatic ring-hydroxylating oxygenase and flavin *** binning and gene analyses indicated that Pseudomonas,Pseudoclavibacter,and Raineyella should cooperate with Rhodococcus for the skatole degradation ***,a pure strain Rhodococcus ***1 was successfully obtained which could utilize skatole as the sole carbon *** genome sequencing showed that strain DMU1 was the predominant population in the *** crude enzyme and RT-qPCR assays indicated that strain DMU1 degraded skatole through the catechol ortho-cleavage ***,our results suggested that synergistic degradation of skatole in the consortium should be performed by diverse bacteria with Rhodococcus as the primary degrader,and the degradation mainly proceeded via the catechol pathway.

关键词： Skatole Biodegradation Bacterial consortium Metagenomics and metatranscriptomics Rhodococcus

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Changes in nectar supply： A possible cause of widespread butterfly decline

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Current Zoology 2012年第3期58卷 384-391页

作者： Michiel F. WALLISDEVRIES Chris A.M. Van SWAAY Calijn L. PLATE De Vlinderstichting / Dutch Butterfly Conservation EO. Box 506 6700 AM Wageningen The Netherlands wageningen University Lab of Entomology EO. Box 8031 6700 EH Wageningen The Netherlands Statistics Netherlands （CBS） P.O. Box 24500 2490 HA The Hague The Netherlands

Recent studies have documented declining trends of various groups of flower-visiting insects, even common butterfly species. Causes of these declines are still unclear but the loss of habitat quality across the wider countryside is thought to be a major factor. Nectar supply constitutes one of the main resources determining habitat quality. Yet, data on changes in nectar abundance are lacking. In this study, we provide the first analysis of changes in floral nectar abundance on a national scale and link these data to trends in butterfly species richness and abundance. We used transect data from the Dutch Butterfly Monitoring Scheme to compare two time periods: 1994-1995 and 2007-2008. The results show that butterfly decline can indeed be linked to a substantial decline in overall flower abundance and specific nectar plants, such as thistles. The decline is as severe in reported flower generalists as in flower specialists. We suggest that eutrophication is a main cause of the decline of nectar sources.

关键词：蝴蝶花蜜原因供应栖息地质量水体富营养化蜜源植物物种丰富度

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Plant base editing and prime editing:The current status and future perspectives

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Journal of Integrative Plant Biology 2023年第2期65卷 444-467页

作者： Jingying Li Chen Zhang Yubing He Shaoya Li Lei Yan Yucai Li Ziwei Zhu Lanqin Xia Institute of Crop Sciences(ICS) Chinese Academy of Agricultural Sciences(CAAS)Beijing 100081China National Nanfan Research Institute(Sanya) Chinese Academy of Agricultural Sciences/Hainan Yazhou Bay Seed LaboratorySanya 572024China

Precise replacement of an allele with an elite allele controlling an important agronomic trait in a predefined manner by gene editing technologies is highly desirable in crop *** editing and prime editing are two newly developed precision gene editing systems which can introduce the substitution of a single base and install the desired short indels to the target loci in the absence of double-strand breaks and donor repair templates,*** their discoveries,various strategies have been attempted to optimize both base editor(BE)and prime editor(PE)in order to improve the precise editing efficacy,specificity,and expand the targeting ***,we summarize the latest development of various BEs and PEs,as well as their applications in *** on these progresses,we recommend the appropriate BEs and PEs for both basic plant research and crop ***,we propose the perspectives for further optimization of these two *** envision that both BEs and PEs will become the routine and customized precise gene editing tools for both plant biological research and crop improvement in the near future.

关键词： base editing CRISPR/Cas plants precision genome editing prime editing

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Abscisic acid and ethephon regulation of cellulase in the endosperm cap and radicle during lettuce seed germination

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Journal of Integrative Plant Biology 2016年第10期58卷 859-869页

作者： Bingxian Chen Jun Ma Zhenjiang Xu Xiaofeng Wang seed Science and Technology lab College of Life SciencesSouth China Agricultural University Agro-biological Gene Research Center Guangdong Academy of Agricultural Sciences

The purpose of this study was to investigate the role of cellulase in endosperm cap weakening and radicle elongation during lettuce （Lactuco sotiva L.） seed germination. The application of abscisic acid （ABA） or ethephon inhibits or promotes germination, respectively, by affecting endosperm cap weakening and radicle elongation. Cellulase activities, and related protein and transcript abundances of two lettuce cellulase genes, LsCEL1 and LsCEL2, increase in the endosperm cap and radicle prior to radicle protrusion following imbibition in water, ABA or ethephon reduce or elevate, respectively, cellulase activity, and related protein and transcript abundan- ces in the endosperm cap. Taken together, these observations suggest that celiulase plays a role in endosperm cap weakening and radicle elongation during lettuce seed germination, and that the regulation of cellulase in the endosperm cap by ABA and ethephon play a role in endosperm cap weakening. However, the influence of ABA and ethephon on radicle elongation may not be through their effects on cellulase.

关键词： Abscisic acid cellulase ethephon endosperm cap weakening lettuce seed germination

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QNE1 is a key flowering regulator determining the length of the vegetative period in soybean cultivars

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Science China(Life Sciences) 2022年第12期65卷 2472-2490页

作者： Zhengjun Xia Hong Zhai Yanfeng Zhang Yaying Wang Lu Wang Kun Xu Hongyan Wu Jinglong Zhu Shuang Jiao Zhao Wan Xiaobin Zhu Yi Gao Yingxiang Liu Rong Fan Shihao Wu Xin Chen Jinyu Liu Jiayin Yang Qijian Song Zhixi Tian Key laboratory of Soybean Molecular Design Breeding Northeast Institute of Geography and AgroecologyInnovation Academy for Seed DesignChinese Academy of SciencesHarbin 150081China Hybrid Rapeseed Research Center of Shaanxi Province Yangling 712100China College of Life Science Northeast Agricultural UniversityHarbin 150030China Institute of Industrial Crops Jiangsu Academy of Agricultural SciencesNanjing 210014China Huaiyin Institute of Agricultural Science of Xuhuai Region Jiangsu Academy of Agricultural SciencesHuai’an 223001China USDA ARS Soybean Genome&Improvement LabBeltsville 20705USA State Key laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China

The soybean E1 gene is a major regulator that plays an important role in flowering time and ***,it remains unclear how cultivars carrying the dominant E1 allele adapt to the higher latitudinal areas of northern *** mapped the novel quantitative trait locus QNE1(QTL near E1) for flowering time to the region proximal to E1 on chromosome 6 in two mapping *** cloning revealed Glyma.06G204300,encoding a TCP-type transcription factor,as a strong candidate gene for *** analysis further confirmed that functional single nucleotide polymorphisms(SNPs) at nucleotides 686 and 1,063 in the coding region of Glyma.06G204300 were significantly associated with flowering *** protein encoded by the candidate gene is localized primarily to the ***,soybean and Brassica napus plants overexpressing Glyma.06G204300 exhibited early *** conclude that despite their similar effects on flowering time,QNE1 and E4 may control flowering time through different regulatory mechanisms,based on expression studies and weighted gene co-expression network analysis of flowering time-related *** the molecular basis of QNE1 control of flowering time enriches our knowledge of flowering gene networks in soybean and will facilitate breeding soybean cultivars with broader latitudinal adaptation.

关键词： QNE1 soybean TCP flowering time vegetative period maturity Zhonghuang 13

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Chromatin architectural alterations due to null mutation of a major CG methylase in rice

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Journal of Integrative Plant Biology 2022年第12期64卷 2396-2410页

作者： Jinbin Wang Xiaochong Li Qianli Dong Changping Li Juzuo Li Ning Li Baoxu Ding Xiaofei Wang Yanan Yu Tianya Wang Zhibin Zhang Yiyang Yu Man Lang Zixian Zeng Bao Liu Lei Gong Key laboratory of Molecular Epigenetics of the Ministry of Education(MOE) Northeast Normal UniversityChangchun 130024China State Key laboratory of Plant Genomics and National Center for Plant Gene Research Institute of Genetics and Developmental BiologyChinese Academy of SciencesBejig 100101China Hainan Yazhou Bay seed lab Sanya 572025China Department of Biological Science College of Life ScienceSichuan Normal UniversityChengdu 610101China

Associations between 3D chromatin architectures and epigenetic modifications have been characterized in ***,any impact of DNA methylation on chromatin architecture in plants is understudied,which is confined to Arabidopsis *** plant species differ in genome size,composition,and overall chromatin packing,it is unclear to what extent findings from *** hold in other ***,the incomplete chromatin architectural profiles and the low-resolution high-throughput chromosome conformation capture(Hi-C)data from *** have hampered characterizing its subtle chromatin structures and their associations with DNA *** constructed a high-resolution Hi-C interaction map for the null OsMET1-2(the major CG methyltransferase in rice)mutant(osmet1-2)and isogenic wild-type rice(WT).Chromatin structural changes occurred in osmetl-2,including intra-/inter-chromosomal interactions,compartment transition,and topologically associated domains(TAD)*** findings provide novel insights into the potential function of DNA methylation in TAD formation in rice and confirmed DNA methylation plays similar essential roles in chromatin packing in A,thaliana and rice.

关键词： 3D chromatin architectures DNA methylation Hi-C osmet1-2 mutant

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