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GLABROUS INFLORESCENCE STEMS regulates trichome branching by genetically interacting with SIM in Arabidopsis

Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第7期14卷 563-569页

作者： Li-li SUN Zhong-jing ZHOU Li-jun AN Yan AN Yong-qin ZHAO Xiao-fang MENG Clare STEELE-KING Yin-bo GAN Department of Agronomy College of Agriculture and Biotechnology Zhejiang University Centre for Novel Agricultural Products Department of Biology University of York

Arabidopsis trichomes are large branched single cells that protrude from the epidermis. The first mor- phological indication of trichome development is an increase in nuclear content resulting from an initial cycle of endoreduplication. Our previous study has shown that the C2H2 zinc finger protein GLABROUS INFLORESCENCE STEMS (GIS) is required for trichome initiation in the inflorescence organ and for trichome branching in response to gibberellic acid signaling, although GIS gene does not play a direct role in regulating trichome cell division. Here, we describe a novel role of GIS, controlling trichome cell division indirectly by interacting genetically with a key endoreduplication regulator SIAMESE (SIM). Our molecular and genetic studies have shown that GIS might indireclty control cell division and trichome branching by acting downstream of SIM. A loss of function mutation of SIM signficantly reduced the expression of GIS. Futhermore, the overexpression of GIS rescued the trichome cluster cell phenotypes of sim mutant. The gain or loss of function of GIS had no significant effect on the expression of SIM. These results suggest that GIS may play an indirect role in regulating trichome cell division by genetically interacting with SIM.

关键词： Arabidopsis thaliana GLABROUS INFLORESCENCE STEMS (GIS) Endoreduplication SIAMESE (SIM) Trichome branching genetic interaction

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Improving grain appearance of erect-panicle japonica rice cultivars by introgression of the null gs9 allele

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Journal of Integrative Agriculture 2021年第8期20卷 2032-2042页

作者： ZHAO Dong-sheng LIU Jin-yu DING Ai-qiu ZHANG Tao REN Xin-yu ZHANG Lin LI Qian-feng FAN Xiao-lei ZHANG Chang-quan LIU Qiao-quan Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Key Laboratory of Plant Functional Genomics of the Ministry of Education College of AgricultureYangzhou UniversityYangzhou 225009P.R.China Co-innovation Center for Modern Production Technology of Grain Crops Jiangsu Key Laboratory of Crop Genetics and PhysiologyYangzhou UniversityYangzhou 225009P.R.China

The panicle architecture and grain size of rice affect not only grain yield but also grain quality,especially grain *** erect-panicle(EP)trait controlled by the qpe9-1/dep1 allele has been widely used in high-yielding japonica rice breeding,but usually accompanied with moderate appearance of milled *** null gs9 allele shows a good potential for improving grain shape and ***,GS9 and qPE9-1/DEP1 loci are tightly linked,and their interaction is unclear,which obviously restricts their utilization in modern rice *** the present study,comparative analyses of protein and mRNA levels revealed that GS9 and qPE9-1 function *** nearisogenic lines(NILs)carrying various allelic combinations of these two loci,NIL(gs9/qpe9-1),NIL(GS9/qPE9-1)and NIL(gs9/qPE9-1),in the EP japonica cultivar 2661(GS9/qpe9-1)background were developed for genetic interaction ***9 and qPE9-1 had additive effects on determining grain size,and the null gs9 allele could decrease grain chalkiness and improve grain appearance without affecting plant and panicle architecture in EP japonica ***,introgression lines(ILs)developed in another released EP japonica cultivar Wuyujing 27(WYJ27)background showed the same additive effect and the feasibility of utilizing the gs9 allele to improve grain appearance quality in high-yielding EP *** study provides an effective strategy for rice breeders to improve rice grain appearance in EP japonica and related cultivars.

关键词： rice GS9 qPE9-1/DEP1 genetic interaction erect panicle grain appearance

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OsMADS16 genetically Interacts with OsMADS3 and OsMADS58 in Specifying Floral Patterning ~in Rice

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Molecular Plant 2013年第3期6卷 743-756页

作者： Dapeng Yun Wanqi Liang Ludovico Dreni Changsong Yin Zhigang Zhou Martin M. Kater Dabing Zhang State Key Laboratory of Hybrid Rice School of Life Sciences and Biotechnology Shanghai Jiao Tong University Shanghai 200240 China College of Fisheries and Life Science Shanghai Ocean University Shanghai 201306 China Department of Biosciences Universita degli Studi di Milano Via Celoria 26 20133 Milan Italy

Rice （Oryza sativa） has unique floral patterns that contribute to grain yield. However, the molecular mechanism underlying the specification of floral organ identities in rice, particularly the interaction among floral homeotic genes, remains poorly understood. Here, we show that the floral homeotic gene OsMADS16 （also called SUPERWOMAN1, SPWl, a B-class gene） acts together with the rice C-class genes OsMADS3 and OsMADS58 in specifying floral organ patterning. OsMADS16 and the two C-class genes have an overlapping expression pattern in the third whorl founder cells. Compared with the single mutants, both spwl-1 osmads3-4 and spwl-1 osmads58 double mutants exhibit additional whorls of glume-like organs within the flower, particularly an extra whorl of six glume-like structures formed at the position of the wild-type stamens. These ectopic glume-like structures were shown to have palea identity through cellular observation and in situ hybridization analysis using marker genes. Our results suggest that B- and C-class genes play a key role in suppressing indeterminate growth within the floral meristem, particularly whorl-3 primordia. We also hypothesize that, in contrast to previous assumptions, the specialized spikelet organ in rice, the palea, is the counterpart of the sepal in eudicots, and the lemma is homologous to the bract.

关键词： rice flower B and C genes genetic interaction stamen identity.

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Genes required for the functions of olfactory AWA neuron regulate the longevity of Caenorhabditis elegans in an insulin/IGF signaling-dependent fashion

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Neuroscience Bulletin 2010年第2期26卷 91-103页

作者：沈露露杜敏林兴凤蔡婷王大勇教育部发育与疾病相关基因重点实验室东南大学医学院遗传与发育系南京210009

Objective To investigate the interaction between the genes required for the functions of AWA olfactory neuron and insulin/IGF signaling in regulating the longevity of nematode Caenorhabditis elegans （C. elegans）. Methods The mutants that had loss-of-function mutation of the genes required for AWA, AWC, ASE, and AFD sensory neurons were employed. Lifespan, the speed of pharynx pumping, the intestinal autofluorescence, the dauer formation, and the brood size were examined. Rescue experiments were performed to confrm the role of the genes required for the functions of AWA neuron in regulating lifespan. Moreover, genetic interactions between genes required for the functions of AWA neuron and insulin/ IGF signaling were investigated. Results Mutations of odr-7, odr-2, and odr-3 genes required for the functions of AWA neuron significantly increased the mean lifespan of nematodes and slowed the accumulation of intestinal autofluorescence. Besides, these mutations were closely associated with higher pumping rates during aging. However, mutation of odr-7, odr- 2, or odr-3 did not obviously affect the brood size or the dauer formation, and the regulation of longevity by odr-7, odr-2, and odr-3 was temperature-independent. In contrast, mutations of genes required for the functions of ASE, AWC, and AFD sensory neurons did not infuence the nematode lifespan. Moreover, expression of odr-7, odr-2 and odr-3 in AWA neuron could completely or largely restore the altered lifespan in odr-7, odr-2 and odr-3 mutants. Furthermore, genetic interaction assay demonstrated that the extended lifespan in odr-7 mutant could be suppressed by daf-16 mutation and enhanced by daf- 2 or age-1 mutation, whereas mev-1 and pha-4 were not required for the long lifespan of odr-7 mutant. Conclusion The genes required for the function of AWA sensory neuron could regulate the nematode longevity in an insulin/IGF signaling-dependent fashion in C. elegans.

关键词： longevity ODR-7 AWA olfactory neuron insulin/IGF signaling genetic interaction C. elegans

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Sensory control of lipid accumulation in nematode Caenorhabditis elegans

Sensory control of lipid accumulation in nematode Caenorhabd...

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中国遗传学会“发育、遗传和疾病”研讨会

作者： Xuemei Xu~(+++) Dayong Wang~(+++) +Department of genetics and Developmental Biology,Southeast University,Nanjing 210009,China ++Key Laboratory of Developmental Genes and Human Disease in Ministry of Education,Southeast University,Nanjing 210009,China

Body fat regulation is a complex process that affects behavior,physiology,and metabolism of an organism in order to balance energy intake with energy *** alarming worldwide increase in obesity has intensified the search to identify genes that control the development,differentiation,and function of fat-storing *** elegans is an attractive choice for the systematic identification of components of fat *** using RNA-mediated interference(RNAi)to disrupt the expression of each of the 16,757 worm genes,Ashrafi et al.(2003)have systematically screened the C. elegans genome for genes necessary for normal fat ***,many other nematode genes controlling the body fat still remain to he identified,since not all genes would be responsive to the RNAi *** the current work,mutations of 47 genetic loci controlling the cilia structure,and functions of sensory and interneurons were screened for the possible lipid accumulation defects compared to wild-type by using Sudan black and Nile Red staining to visualize the fat *** of 16 genetic loci(tax-2,tax-4,daf-11,daf-21,the-1,ttx-1,osm-9,daf-2,gpc-1,daf-7,gcy-5,ttx-3,the-13,daf-10,osm-1 and osm-6)increased the fat storage,whereas mutations of 3 genetic loci(tax-6,che-11 and osm-3)reduced the lipid *** addition,mutations of genes of daf-21,tax-6,tax-4,the-13 and osm-6 also results the defects of body bends,and/or head thrashes,and/or brood size,and/or the number of eggs in *** interaction assay further indicated that TGF-beta signaling act upstream of most of these identified genes,and daf-lO,daf-11,daf-21,che-1,gcy-5,ttx-3,che-13,osm-1 and osm-6 functions upstream of the insulin signaling by interacting with the daf-2 and daf-16,respectively,to regulate the lipid ***,the genes involved in the sensory control of lipid accumulation and the pathways mediated by these genetic loci were identified and elucidated in ***

关键词： lipid accumulation sensory control genetic interaction C.elegans

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Functions of HDA-4 in regulating long-term memory and HDA-4-mediated genetic pathways in Caenorhabditis elegans

Functions of HDA-4 in regulating long-term memory and HDA-4-...

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中国神经科学学会第四次会员代表大会暨第七届全国学术会议

作者： Ya-Ou HU~(1,2),Da-Yong WANG~(1,2) 1 Department of genetics and Developmental Biology,Southeast University,Nanjing 210009,China 2 Key Laboratory of Developmental Genes and Human Disease,Ministry of Education,Nanjing 210009,China

＜正＞HDA-4,which encodes the classⅡhistone deacetylase,acts as an important transcriptional co-repressor by directly interacting with transcription factors in ***,roles of the HDA-4 in regulating the functions of nervous system are still largely *** organism Caenorhabditis elegans has been proved to be well suited for dissecting the molecular and cellular mechanism of learning and memory behaviors,and systematic studies have been performed in molecular and genetic control of behavioral plasticity in *** the present study,using classic thermotaxis model,we show that HDA-4 may play a key role in regulating long-term memory（LTM）.HDA-4 knockout animals exhibited significantly severe defects in long-term memory,whereas no obvious defects were observed for shortterm memory in *** addition,no significantly severe defects of locomotion behaviors,reproduction and metabolism were found in HDA-4 knockout and knockdown animals,which further conforms the functions of HDA-4 in controlling *** mutation of HDA-4 also did not affect the neural activities of cholinergic,GABAergic,dopaminergic, and serotonergic systems,as well as the ASE,AWA,AFD sensory neurons and AIY ***-4 was expressed in the cytoplasm at the early stages of larva and translocated to the nucleolus at the late stages of larva and adult animals, suggesting the possibly temporal control of HDA-4 in regulating ***,the tissue activity in nervous system explained most of the function of HDA-4 regulating LTM,whereas the tissue activity of HDA-4 in non-neural tissues resulted in no marked LTM defects compared to wild type,which indicates that function of HDA-4 in nervous system is predominantly required for LTM *** interaction analysis by constructing a series of double mutants further suggests that the function of HDA-4 was dependent on the expression of CMK-1 and UNC-43,but not dependent on the expression of its target MEF-2 and 14-3-3 prot

关键词： C.elegans long-term memory HDA-4 genetic interaction

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