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Improved germination of threatened medicinal Prunus africana for better domestication: effects of temperature, growth regulators and salts

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Journal of Forestry Research 2020年第6期31卷 2403-2411页

作者： Justine Germo Nzweundji Koffi Konan Leopold MNyochembeng Nehemie Donfagsiteli Tchinda Nicolas Niemenak Department of Biological Science Higher Teacher Training CollegeUniversity of Yaounde IPO Box 47Yaounde´Cameroon Centre for Research on Medicinal Plants and Traditional Medicine Institute of Medical Research and Medicinal Plants Studies(IMPM)PO Box 6163Yaounde´Cameroon IngateyGen LLC Elizabeth CityNCUSA Department of Natural Resources and Environmental Sciences Alabama A&M UniversityHunstvilleALUSA

Prunus africana is an endangered medicinal species and has been classified as a priority for domestication in Cameroon.However,the seeds rapidly lose their viability during storage at room temperature after 2–3 months.This study aimed to improve seed germination of P.africana by germinating at different temperatures(4℃,28℃)using different concentrations of growth stimulators(sodium nitrate and gibberellic acid)and different concentrations of salts.P.africana seeds had 91.7%germination at 4C after 1 month of storage.growth regulators considerably influenced germination after 6 months and reached 66.0%with 10 mM gibberellic acid and 100%with 10 mM sodium nitrate.Approximately three shoots per seed were developed,an indication of polyembryony.Histochemical analyses revealed the presence of protein-like bodies close to the embryo axis and accumulations of starch after 7 days of germination.After 14 days,amyloplasts and dark protein bodies of various sizes were observed.The outcome of this study will contribute to improve the germination of P.africana for better domestication and conservation.

关键词： Conservation Germination growth regulators Histochemical analyses Prunus africana Temperature

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Design,synthesis and biological activity of novel substituted pyrazole amide derivatives targeting Ec R/USP receptor

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Chinese Chemical Letters 2016年第4期27卷 566-570页

作者： Xi-Le Deng Jin Xie Yong-Qiang Li De-Kai Yuan Xue-Ping Hu Li Zhang Qing-Min Wang Ming Chi Xin-Ling Yang Department of Applied Chemistry College of Science China Agricultural University State Key Laboratory of Elemento-Organic Chemistry Research Institute of Elemento-Organic Chemistry Nankai University

In order to discover highly active ecdysone analogs, a series of new substituted pyrazole amide derivatives were obtained using structure-guided optimization method and further screened for their insecticidal activities, in the basis of the core structures of the two active compounds N-（3-methoxyphenyl）-3-（tert-butyl）-1-phenyl-1H-pyrazole-5-carboxamide（6e） and N-（4-（tert-butyl）phenyl）-3-（tert-butyl）-1-phenyl-1H-pyrazole-5-carboxamide（6i）, previously presented by us. The chemical structures of the title compounds were identified by spectral analyses. The preliminary bioassay results indicated that one among the synthesized pyrazole derivatives, compound 34, endowed with good activity against Mythimna Separata at 10 mg/L, which was equal to that displayed by the positive control tebufenozide. In addition, examples of molecular docking and molecular dynamics studies demonstrated that 34 may be the potential inhibitor to Ec R and its docking conformation was similar to that of tebufenozide. In addition, increasing the hydrophobic effect and considering the suitable bulk effect on pyrazole ring are beneficial to the inhibiting activity to Ec R and activity in vivo.

关键词： Moulting hormone Pyrazole amide Bioactivity Molecular docking Molecular dynamics simulation Insect growth regulators

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Solanum lycopersicum: Novelties for Climate Factors and Its Agronomic Management for High Yields

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World Journal of Engineering and Technology 2022年第3期10卷 605-612页

作者： Víctor García-Gaytán Soledad García-Morales Ana V. Coria-Téllez Fanny Hernández-Mendoza Janet María León-Morales El Colegio de Michoacán La Piedad México Profesor Investigador Mejoramiento Integral de Plantas a Través de la Genética y Nutrición Vegetal La Piedad México (CONACYT) Centro de Investigación y Asistencia en Tecnología y Diseñ o del Estado de Jalisco Zapopan México Coordinación Académica Región Altiplano Oeste Universidad Autónoma de San Luis Potosí San Luis Potosí México

The intensive production of vegetables such as tomatoes depends on various strategies to achieve high yields.Purpose of this manuscript is to provide scientific and technological strategies for the intensive production of tomato or other vegetables in mega-production factories. However, with the advancement of knowledge, new improvements in the strategies will be incorporated. We have carried out research related to growth and yield variables in S. Lycopersicum. From this research we have worked on the intensive production of this noble vegetable at an industrial level. The results obtained are improvements in the production system. The improvements include the selection of the appropriate variety, germination and development of seedlings in a certified nursery. Trans-plantation in soil or hydroponics. The conditions of nutrient applications from the irrigation head system. The ventilation system and monitoring of climatic factors both day and night (temperature and relative humidity). Monitoring of macro- and micronutrients in the plant system, including Ca, K, Fe, and Zn. Soil fertility analyzes should include: primary and secondary macronutrients (ppm), organic matter (OM), EC, pH, bulk density (BD), and cation exchange capacity (CEC). The nutritional diagnosis to confirm ranges of sufficiency. As a tool in plant nutrition programs, foliar application can include biostimulants and growth regulators. The foregoing can be considered strategies for the integral management of the tomato crop.

关键词： Integrated Management Climate Factors Plant Nutrition growth regulators

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Assessment of factors affecting in vitro shoot regeneration from axillary bud explant of Camptotheca acuminata

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Journal of Forestry Research 2005年第1期16卷 52-54,i003页

作者： WANGHui-Mei ZUYuan-Gang DONGFeng-Li ZHAOXiao-Ju KeyLaboratoryofForestPlantEcology theMinistryofEducationNortheastForestryUniversityHarbin150040P.R.China

Axillary buds from 3-yr.-old seedlings of Camptotheca acuminata in the greenhouse were cultured on the different basal media with different concentrations of growth regulators for shoot regeneration for studying the effects of different basal media, different concen- trations of growth regulators (BA or TDZ), sucrose, agar and pH value on shoot regeneration from axillary bud. The results showed that B5 and WPM media were the optimal basal media and the optimal phyotohormone was BA of 1.0 mg/L or TDZ of 0.1mg/L; The concentrations of sucrose of 30g/L and agar of 6g/L were most suitable for the shoot regeneration; pH value from 5.8 to 6.6 were broadly effective, but the best at pH 5.8.

关键词： Camptotheca acuminata Axillary bud Shoot regeneration growth regulators Basal media

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Vegetative Reproduction through Green Cuttings of the Introduced Form <i>Weigela florida</i>f. “<i>Bristol ruby</i>” (Caprifoliaceae) in the Conditions of the Tashkent Botanical Garden (Uzbekistan)

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American Journal of Plant Sciences 2021年第7期12卷 994-1001页

作者： Dilovar A. Khamraeva Nargiza K. Rakhimova Eldor E. Temirov Laboratory Dendrology of the Tashkent Botanical Garden Named after Academician F.N. Rusanov Institute of Botany of the Academy of Sciences Tashkent Uzbekistan

For the first time, work was carried out on the vegetative reproduction of Weigela florida f. “Bristol Rubru” (Caprifoliaceae) was introduced into the Tashkent Botanical Garden (Uzbekistan) through green branches. As a result of the research conducted, it was noted that the vegetative reproduction possibilities of the “Bristol Ruby” form of Weigela florida were high. When placed on stimulants of two types (kornevin, heteroauxin), it became known that kornevin stimulants are effective in taking root. It was found that the effective way to multiply this form by green branches in a vegetative way—when placed on the stimulator of kornevin from the middle part of the rod, the indicators of root extraction of the cuttings were 93.3%, which is more effective than other options. When vegetative reproduction of this decorative form, it is recommended that the seedlings come to the standard state in 3 - 4 years and the root extraction indicators are high—this is its use as the second row shrubs in the case of growing on strongly saline soils in the conditions of Uzbekistan. The cultivation of green cuttings of the form in the fog showed that they are more effective than in the open ground.

关键词： Form Weigela florida f. Bristol Ruby (Caprifoliaceae) Vegetative Reproduction Green Shoots growth regulators Biologically Active Substances Tashkent Botanical Garden Uzbekistan Introduction

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Effects of Trinexapac-Ethyl on different wheat varieties under desert conditions of Mexico

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Agricultural Sciences 2012年第5期3卷 658-662页

作者： Raúl Leonel Grijalva-Contreras Rubén Macías-Duarte Gerardo Martínez-Díaz Fabián Robles-Contreras Fidel Nunez-Ramírez National Research Institute for Forestry Agricultural and Livestock(INIFAP)CaborcaMéxico Agricultural Science Institute University Autonoma of Baja California(ICA-UABC)BajaMéxico

A field study was conducted to determine the effect of Trinexapac-Ethyl (TE) on four wheat varieties (Rafi C97, Altar C84, Nacori C97 and Rayon F86) at three growth stages (first node, second node and flag leaf). TE application (150 g a.i. ha-1) reduced plant height and decreased grain yield at any growth stage. Yield decrease was associated to a significant reduction in the number of grains per spike and in grain weight. TE delayed flowering time and grain maturity, while stem diameter and spikes m-2 were not affected. Further studies are needed to clarify the effect of TE on wheat under desert conditions of Mexico.

关键词： growth regulators Moddus Yield Plant Height Lodging

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