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Sea　water　environment　copper　requirement　of　egg　hatching　and　naupliar　metamorphosis　of　Peaneus　chinensis

Acta Oceanologica Sinica 1995年第3期14卷 421-428页

作者： Yuan Youxian Qu Keming Liu Libo Gao Chengnian and Zhang Duxi(Yellow Sea Fisheries Research institute, Chinese Academy of Fishery Sciences, Qingdao 266071, China)(Jimo Fisheries Bureau, Jimo 266200, China)

A new method was used to remove heavy metals in sea water. The requirement of copper in sea water ofegg hatching and naupliar metamorphosis of Penaeus chinensis was investored. A certain amount of copper ion andchelator nitrilotriacetic acid (NTA) were added in the de-heavy-metal-ionized sea water and then the cupric ion actvitywas calculated. The effects of copper ion on egg hatching and naupliar metamorphosis were observed. It was firstfound by experiments that trace ionic copper (10-10.80-10-8.80 mol/dm3) was essential to the growth and development of egg and nauplii of penaeid shrimp and chelated copper had no actions for these living processes,but in highconcentrations (>10 -7.80 mol/dm3) ionic copper was toxic. The nauplii were more sensitive to necessity and tokicityof ionic copper than eggs.

关键词： egg hatching copper ion Penaeus chinensis,naupliar metamorphosis

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Effect of Six Bacterial Strains on the Activity of Second Instar Larvae and egg hatching of Meloidogyne incognita

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Plant Diseases and Pests 2024年第5期15卷 15-18页

作者： Jie LIU Li HE Zixuan WANG Jianqing MA Xiaolong TONG Dandan CAO Gangyong ZHAO Sinofert Holdings limited Beijing 100069China Hebei Innovation Center for Bioengineering and Biotechnology Baoding 071002China School of Life Sciences Hebei UniversityBaoding 071002China Engineering Research Center of Ecological Safety and Conservation in Beijing-Tianjin-Hebei(Xiong an New Area)of MOE Baoding 070001China

[Objectives]The paper was to screen effective biocontrol strains against Meloidogyne incognita.[Methods]The effect of six bacterial strains sourced from the research group s strain library on the activity of second instar larvae of ***,as well as on egg hatching,was evaluated.[Results]The treatment of fermentation supernatant derived from the X-2 strain exhibited a pronounced lethal effect on ***,with a corrected mortality rate reaching 97%within 72 ***,this treatment significantly inhibited egg hatching,achieving an inhibition rate of 94.69%at a 20-fold *** strain was identified as Bacillus velezensis,belonging to the genus Bacillus,and was designated as RKN1111.[Conclusions]This study presents alternative strains and a theoretical framework for the biological control of ***.

关键词： Meloidogyne incognita Bacterial strain Second instar larvae egg hatching

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Effects of Lanthanum-Amino Acid Complexes on egg hatching and Nauplius Metamorphosis of Penaeus chinensis

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Marine Science Bulletin 2002年第1期4卷 93-97页

作者：辛福言曲克明 Yellow Sea Fisheries Research Institute CAFS Qingdao 266071

Studies have been carried out on the effect of lanthanum-amino acid complexes on embryo development and nauplius growth ofPenaeus chinensis. The experimental results indicate that: (1)The optimum concentrations of lanthanum-proline and Lanthanumphenylalanine for the development of eggs in monocell and dicell stages are 1.50～ 4.00mg/L and 0.50～3.00 mg/L, respectively, the egg hatching rates being raised by 21.0 ～ 46.0% and 23.0 ～42.8% ( P ＜ 0.05 ) respectively. (2)The optimum concentrations of lanthanum- proline complex and Lanthanum-phenylalanine complex for the growth ofnauplii are 1.50～4.00 mg/L and 0.50～3.00 mg/L, the metamorphosis rate from nauplius to protozoea being raised by 16.4 ～27.5% and 20.4～26.7% (P ＜ 0.05 ) respectively. (3)The positive effect of lanthanum-amino acid complexes on egg hatching and nauplius metamorphosis of Penaeus chinensis is better than that of lanthanum. With regard to the positive effect, lanthanum-proline complex is better than Lanthanum-phenylalanine complex.

关键词： Lanthanum-amino acid complex Penaeus chinensis egg hatching Nauplii

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eIF3 subunit M regulates blood meal digestion in Rhodnius prolixus affecting ecdysis, reproduction, and survival

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Insect Science 2023年第5期30卷 1282-1292页

作者： Pilar Ameijeiras Natalia Capriotti Sheila Ons Pedro L.Oliveira Marcos Sterkel Laboratorio de Neurobiología de Insectos(LNI) Centro Regional de Estudios GenómicosFacultad de Ciencias ExactasUniversidad Nacional de La PlataCENEXACONICETLa PlataBuenos AiresArgentina Instituto de Bioquímica Médica Leopoldo de Meis Universidade Federal do Rio de JaneiroRio de JaneiroBrazil Instituto Nacional de Ciência e Tecnologia em Entomologia Molecular(INCT-EM) Rio de JaneiroBrazil

In triatomines,blood-feeding triggers many physiological processes including post embryonic development and *** feeding habits,such as hematophagy,can shape gene functions to meet the challenges of each type of *** gut of blood-sucking insects faces particular challenges after feeding due to the quantity and the quality of the food ingested.A comparison of transcriptomic and proteomic data indicates that post transcriptional regulation of gene expression is crucial in the triatomine *** was proposed that eukaryotic translation initiation factor 3 subunit m(eIF3m)and eIF3e define 2 different eIF3 complexes with a distinct affinity for the different mRNAs,thus selecting the set of mRNAs to be translated and constituting a post transcriptional mode of regulation of gene *** the eIF3m is mainly expressed in the gut,we evaluated its relevance in Rhodnius prolixus physiology through RNA interference-mediated gene *** knockdown of eIF3m reduced the digestion rate,affecting the processes triggered by a blood *** silencing inhibited molting and caused premature death in nymphs while impaired ovary development,oviposition and increased resistance to starvation in adult *** survival of males after feeding(resistance to starvation)was not affected by eIF3m *** information regarding the eIF3m function in insects is scarce and the phenotypes observed in *** upon eIF3m silencing are different and more severe than those previously described in Drosophila melanogaster,indicating a pleiotropic role of this gene in triatomines.

关键词： egg hatching hematophagous vectors lifespan oviposition post embryonic development starvation resistance

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