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1.
Data are given on the biochemical composition of apple fruits of spontaneous and induced clones and tetraploid forms. The possibility of improving it by means of spontaneous and induced clones is shown. 相似文献
2.
Ortega Jaime Díaz Sedov Sergey Romero Francisco Jardines Luis Gerardo Martínez Rebolledo Elizabeth Solleiro 《Journal of Soils and Sediments》2022,22(3):942-956
Journal of Soils and Sediments - The objective of this study was to examine the pedogenetic evolution occurring in technic hard materials from an iron mine through the characterization of a... 相似文献
3.
Summary A method is described for selecting resistant transformed tomato genotypes in vitro at the stage of immature embryos. The utilization of HLH nutrient medium with the selective agent kanamycin is proposed. Normal development of seedlings from immature embryos, which do not form callus, is a good and true indicator for isolation of resistant genotypes. The immature embryos do not germinate and develop on MS selective medium. 相似文献
4.
Surface and buried Andosols and buried Luvisols of the Nevado de Toluca Late Quaternary tephra-paleosol sequence (Central Mexico) were studied to show whether these soils present an evolutionary sequence and to determine the pedogenic mechanisms and environmental factors involved in the evolutionary process. Micromorphological observations and mineralogical composition of fine sand and clay fractions were used to detect type and succession of soil-forming process. Some of the buried Andosols, defined as “intergrade” Andosols, have a predominantly blocky structure, humus-depleted areas, redoximorphic features and thin clay coatings in Ah horizons. Clay fractions of buried Andosols contain halloysite besides amorphous components, whereas in modern Andosols, allophane is dominant. Luvisols have micro-areas with granular structure and abundant phytoliths in the groundmass of Bt horizons assumed to be the relict Andosol features. Luvisol clay fractions are dominated by halloysite and kaolinite. Primary minerals show micromorphological weathering features in all studied soils being stronger in Luvisols; however, even in Luvisols, sand fractions consist mostly of unstable volcanic silicates. We hypothesise that the studied profiles form an evolutionary sequence: Andosols–“intergrade” Andosols–Luvisols; the soil transformation is supposed to be linked to progressive crystallisation of 1:1 clay minerals. Comparing the Nevado de Toluca paleosol properties with the existing data on volcanic soil climo- and chronesequences and assessing the regional paleopedological and lacustrine records of Quaternary paleoclimates, we concluded that wet/dry climatic oscillations took place during the formation of the studied paleosols. Rapid crystallisation of 1:1 minerals occurred during dry phases, which speeded up the Andosol to Luvisol transformation and made it independent from the primary mineral weathering status. The Andosol to Luvisol transformation accelerated by climatic fluctuations is thought to be a common soil evolutionary pathway in the subtropical and tropical regions of recent volcanism, which suffered contrasting precipitation oscillations in the Quaternary. 相似文献
5.
Alexandrovskiy A. L. Balabina V. I. Mishina T. N. Sedov S. N. 《Eurasian Soil Science》2020,53(1):1-15
Eurasian Soil Science - A method of the Holocene paleoenvironment reconstruction based on the analysis of pedobiomarkers in tell deposits is suggested. On the Yunacite tell, such a reconstruction... 相似文献
6.
E. N. Sedov M. A. Makarkina G. A. Sedysheva Z. M. Serova T. V. Yanchuk 《Russian Agricultural Sciences》2016,42(5):304-309
The innovational trends in apple breeding include the development of triploid scab immune apple cultivars. The long-term phytopathological and biological studies made it possible to develop approximately 20 first home scab immune apple cultivars and include them in the State Register of Breeding Successes. For the first time in Russia and in the world, the biological and cytoembryological studies favored the development of a number of triploid cultivars that are characterized by high marketability and better biochemical composition of fruit in comparison with well-known old cultivars and diploid scab nonimmune cultivars of VNIISPK breeding. 相似文献
7.
E. N. Sedov G. A. Sedysheva M. A. Makarkina E. V. Ul’yanovskaya Z. M. Serova 《Russian Agricultural Sciences》2011,37(4):286-289
Long-term data are given on priority directions in apple breeding: for an increased content of biologically active substances
in fruit and for scab resistance. The high effectiveness of apple breeding at the polyploid level is shown. 相似文献
8.
T. Cruz‐y‐Cruz S. Sedov G. Sánchez T. Pi‐Puig K. Pustovoytov H. Barceinas‐Cruz B. Ortega‐Guerrero E. Solleiro‐Rebolledo 《European Journal of Soil Science》2014,65(4):455-469
Red palaeosols of the late Pleistocene‐early Holocene, both buried and non‐buried, were studied recently in Sonora (NW Mexico) to reconstruct their pedogenesis as well as the palaeoenvironmental conditions. The alluvial palaeosol‐sedimentary sequence of the La Playa archaeological site is a key locality for the buried San Rafael palaeosol, which exhibits a 2Ah‐2Bw‐2BCk‐3Bgk profile and was defined as a Chromic Cambisol. Radiocarbon dates from pedogenic carbonates and charcoal set the soil formation interval between > 18 000 and 4300 calibrated years before present (cal. year BP). Micro‐morphological observations together with profile distribution of clay, carbonates, organic carbon, pedogenic iron oxides and rock magnetic properties indicated a strong eluvial‐illuvial redistribution of carbonates, moderate silicate weathering and gleying in the lower horizon. Although this soil was much more developed than the overlying syn‐sedimentary late Holocene Fluvisols, clay mineral composition and stable carbon isotope signatures of humus and carbonates were similar in both soils. We suggest that pedogenesis of the San Rafael palaeosol took place under a slightly more humid climate and relative geomorphic stability. This agrees with the regional palaeoclimate reconstruction, which indicates a moister climate during the Late Wisconsin glaciation (MIS 2). An abrupt termination of the San Rafael pedogenesis marked by disturbance and aridization features in the Ap horizon of the palaeosol could be linked to a global drought around 4200 years cal. year BP. Surface Chromic Cambisols in northern Sonora show similar pedogenetic characteristics to the buried red palaeosols of La Playa. They appear to be a relict component of the present day soil mantle. 相似文献
9.
E. N. Sedov E. S. Salina N. S. Levgerova Z. M. Serova 《Russian Agricultural Sciences》2007,33(2):89-91
Data of long-term investigations of the suitability of widespread apple varieties for producing high-quality juice are given. A purposeful breeding program made it possible to create forms with a high juice yield and quality for orchards producing raw materials. 相似文献
10.
S. A. Sycheva S. N. Sedov M. A. Bronnikova V. O. Targulian E. Solleiro-Rebolledo 《Eurasian Soil Science》2017,50(9):991-1009
The results of a hierarchical morphogenetic, physicochemical, and mineralogical study of the Ryshkovo full-profile texture-differentiated paleosol of the Mikulino Interglacial from the section at Aleksandrov quarry in Kursk oblast are discussed. The correlation analysis of the stratigraphy of this section with global geological records made it possible to determine the position of the Ryshkovo paleosol in the chronostratigraphic system of the Late Pleistocene and to attribute it to stage MIS 5e; the duration of pedogenesis for this paleosol was no more than 12–15 ka. The results of the study indicate that the Ryshkovo paleosol is close in its properties to the Holocene soddy-podzolic soils of the East European Plain. No direct evidences in favor of the former interpretation of this paleosol as a lessivated soil genetically close to Luvisols of nemoral broadleaved forest of Central Europe have been found. The difference between the paleosol of the Mikulino Interglacial and the modern soddy-podzolic soils is mainly related to the distribution of clay coatings. In the upper part of the illuvial horizon of Mikulino paleosol, clay coatings are few in number, and typical tongues of podzolized (albic) material are absent in the profile. At the same time, silty coatings (skeletans) are abundant even in the lower part of the illuvial horizon. In general, the Mikulino paleosol is characterized by a smaller diversity of clay pedofeatures. These differences might be related to less contrasting fluctuations of the environmental conditions in the second half of the Mikulino Interglacial, to the periodical renewal of the eluvial part of Mikulino paleosol by erosional and accumulative processes, and to the absence of anthropogenic impacts on the soil during the Mikulino Interglacial. The burying of the Ryshkovo paleosol took place due to the intense development of erosional processes induced by the contrasting climatic events at the end of the interglacial period accompanied by catastrophic forest fires and sharp cooling of the climate upon the transition to the Valdai glaciation. 相似文献