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排序方式: 共有237条查询结果,搜索用时 640 毫秒
231.
Silveira Diógenes Cecchin Basso Simone Meredith Scheffer Ebone Luciano Antônio Caverzan Andréia Machado Juliana Medianeira Schaeffer Afonso Henrique Folchini Jessica Aneris Lângaro Nadia Canali 《Journal of Crop Science and Biotechnology》2022,25(1):39-50
Journal of Crop Science and Biotechnology - The runout of newly cultivated areas in the world without recurring to the deforestation, demand a necessity to improve yield to sustain a growth... 相似文献
232.
The genus Aegilops L. is a very important genetic resource for the breeding of bread wheat Triticum aestivum. Therefore, an accurate and easy identification of Aegilops species is required. Traditionally, identification of Aegilops species has relied heavily on morphological characters. These characters, however, are either not variable enough among Aegilops species or too plastic to be used for identification at the species level. Molecular markers that are more stable within
species, therefore, could be the alternative strategy towards an accurate identification. Since the chloroplast DNA has a
lower level of evolution compared to the nuclear genome, an attempt was made in this study to investigate polymorphism in
the chloroplast DNA among 21 Aegilops species (including Ae. mutica that is now known as Amblyopyrum muticum) and between the latter and T. aestivum to generate markers for the diagnosis of all targeted species. Cleaved amplified polymorphic sequence (CAPS) applied on 22
coding and non-coding chloroplast regions using 80 endonucleases and sequencing of two of those regions revealed little polymorphism
between T. aestivum and the various Aegilops species examined and to a less extent was the variation among Aegilops species. Polymorphism observed among species analysed allowed the discrimination of T. aestivum and 12 Aegilops species. 相似文献
233.
Figueiredo IM Pereira NR Efraim P García NH Rodrigues NR Marsaioli A Marsaioli AJ 《Journal of agricultural and food chemistry》2006,54(12):4102-4106
The development of an analytical method using 1H nuclear magnetic resonance (1H NMR) spectrometry to monitor cupuassu (Theobroma grandiflorum Spreng) bean fermentation, drying, and roasting processes is reported. The analysis of organic acids and alcohols of crude water extracts of cupuassu ground kernels were monitored by HPLC and 1H NMR spectroscopy. The residual protein signals caused deleterious effects on acid and alcohol quantifications. Therefore, the analytical procedures were optimized by sample cleanup and water suppression pulse sequences in order to obtain compatible data using HPLC and 1H NMR. The quantification of lactic acid, acetic acid, and 2,3-butanediol by NMR is 5- to 10-fold faster than by HPLC, with the advantage of providing the identification of several chemical species in a single experiment. Application of these analytical conditions to some cupuassu samples revealed that this methodology can be applied to the quality profiles of fermentation and roasting processes. 相似文献
234.
Karima Bouchemal Ryma Bouldjadj Mohamed Nadir Belbekri Nadia Ykhlef Abdelhamid Djekoun 《Archives of Agronomy and Soil Science》2017,63(5):710-722
Changes in enzymatic antioxidants and oxidative injury were evaluated in leaves of 10 wheat genotypes under drought, heat and paraquat (PQ) stress. The seedlings of wheat were germinated in plastic pots and grown in a greenhouse under semi-controlled conditions. Each treatment was performed at the 4th–5th leaf stage. Antioxidant enzyme activities catalase (CAT), guaiacol peroxidase (GPOX), lipid peroxidation (LPO), hydrogen peroxide (H2O2) production, chlorophyll content and cell membrane leakage were determined. Results indicated that the three treatments decreased membrane stability, chlorophyll content and increased the LPO, H2O2 content and activities of CAT and GPOX. The ANOVA analysis revealed significant differences between genotypes in response to the various treatments imposed. Wheat genotypes Bidi 17, Beliouni and Djennah khetifa showed the lowest LPO and H2O2 content and the highest total chlorophyll content, relative electrolyte leakage (REL), CAT and GPOX activities, while Colosseo, Waha, Vitron and Benisuif showed the lowest antioxidant defends, lowest REL and the highest H2O2 and MDA contents. Oued zenati, Beltagy and Bousselam showed intermediate response in terms of oxidative stress and antioxidant activity. 相似文献
235.
Hctor M. Esparza‐Leal Jesús T. Ponce‐Palafox Carlos M. Cervantes‐Cervantes Wenceslao Valenzuela‐Quinez Antonio Luna‐Gonzlez Ely S. Lpez‐lvarez Nadia Vzquez‐Montoya Mariel Lpez‐Espinoza Rosa L. Gmez‐Peraza 《Aquaculture Research》2019,50(3):944-950
Growth, immunological and physiological parameters of white shrimp Litopenaeus vannamei reared at different salinity levels (1, 10, 15, 25 and 35 g/L) at stocking density of 214 shrimp/m3 were examined at 1, 30 and 63 days. Results showed that the total haemocyte count (THC) of shrimp decreased with time at all salinity levels, indicating a potential reduction in the resistance of shrimp against pathogens, since a low value of THC indicates a perturbation of the immune system. Glucose and protein values observed in the haemolymph throughout the study indicate that shrimp adapted well to low salinities (1, 10 and 15 g/L). Although of those shrimp reared at 10 g/L only 83.3% survived, at this salinity, shrimp depicted a higher glucose concentration in haemolymph at the beginning and end of the study. 相似文献
236.
Nadia C Olivares-Bañuelos Luís M Enríquez-Paredes Lydia B Ladah Jorge De La Rosa-Vélez 《Fisheries Science》2008,74(4):804-812
Abstract: Purple sea urchin Strongylocentrotus purpuratus is fished from British Columbia, Canada to Punta Baja, Mexico. The North American population has been divided into northern and southern fishery stocks at the break of Point Conception, but little is known about its southernmost distribution along the Mexican Pacific coast of the Baja California peninsula. In this study purple sea urchin populations in six sites along the Baja California peninsula were analyzed using mitochondrial deoxyribonucleic acid restriction fragment length polymorphism (mtDNA RFLP). A homogeneous distribution of three common haplotypes among all sites was observed. A significant F ST value, however, indicated genetic structure mainly due to the haplotype array in San Miguel, Isla Todos Santos and Punta Baja sites, which were characterized by having high haplotype diversity and several unique haplotypes. Homogeneous distribution of haplotypes along the peninsula could have been influenced by the unidirectional California Current system, flowing north to south. Unique haplotypes in Punta Baja and the structure found could be the result of local oceanographic features specific to this major upwelling zone. It may be necessary to consider the Punta Baja populations individually when managing the purple sea urchin fishery in Baja California, as they show signs of being a unique stock. 相似文献
237.
Rioja Rose Angeli Palomar-Abesamis Nadia Juinio-Meñez Marie Antonette 《Aquaculture International》2022,30(2):1087-1088
Aquaculture International - 相似文献