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Phyllotactic pattern formation in early stages of cactus ontogeny

100%

Gola E. M.

Acta Societatis Botanicorum Poloniae

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2006

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tom 75

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nr 4

271-279

Representatives of the family Cactaceae are characterized by a wide range of phyllotaxis. To assess the origin of this diversity, early stages of phyllotactic pattern formation were examined in seedlings. The analysis of the sequence of areole initiation revealed intertribal differences. In seedlings from the Trichocereeae (Gymnocalycium, Rebutia) and Notocacteae (Parodia) tribes, two opposite cotyledonal areoles developed as the first elements of a pattern. Usually, next pair of areoles was initiated perpendicularly to cotyledonal areoles, starting the decussate pattern. This pattern was subsequently transformed into bijugate or into simple spiral phyllotaxis. In seedlings from the Cacteae tribe (Mammillaria and Thelocactus), cotyledonal areoles were never observed and the first areoles always appeared in the space between cotyledons. It was either areole pair (mainly in Mammillaria), starting a decussate pattern, or a single areole (mainly in Thelocactus) quickly followed by areoles spirally arranged, usually in accordance with the main Fibonacci phyllotaxis. Differences in the initial stages of pattern formation do not fully explain the phyllotaxis diversity in mature cacti. Only two, the most common phyllotactic patterns occurred in the early development of studied seedlings, i.e. the main Fibonacci and the decussate pattern. Discrepancy in the range of phyllotactic spectra in seedlings and in mature plants suggests that phyllotaxis diversity emerges during further plant growth. Initial phyllotactic transformations, occurring already in the very early stages, indicate great plasticity of cactus growth and seem to support the hypothesis of the ontogenetic increase of phyllotaxis diversity due to transformations.

2

Morphology and morphogenesis of a Chinese population of the soil urostylid ciliate, Extraholosticha sylvatica (Foissner, 1982) Li et al., 2017 (Ciliophora, Hypotrichia)

100%

Li J., Wen K., Zhu E., Wang J.

Acta Protozoologica

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2019

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tom 58

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nr 4

3

Ispol'zovanie psikhomotornykh uprazhdenijj dlja razvitija bystroty i koordinacionnykh sposobnostejj shkol'nikov

100%

Golenko A.

Aktywność Ruchowa Ludzi w Różnym Wieku

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2006

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tom 10

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nr 1

4

The influence of moderate water deficiency on the presence of lignin in different ecotypes of Alisma plantago-aquatica L.

100%

Ovrutska I. I.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

5

The cerebral and meningeal venous valves during human ontogenesis

100%

Kedzia A.

Folia Morphologica

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1987

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tom 46

|

nr 3-4

6

Stability and plasticity of plant ontogenesis

100%

Kordyum E. L.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

7

A morphogenetic description of Thigmokeronopsis stoecki Shao et al., 2008 (Ciliophora, Hypotricha) and a comparison with members of the family Pseudokeronopsidae

100%

Chen X., Li L., Hu X., Shao C., Al-Farraj A., Al-Rasheid A. S.

Acta Protozoologica

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2013

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tom 52

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nr 2

8

Total antioxidant activity of amaranth leaves in оntogenesis

100%

Zelenkov V. N., Lapin A. A., Belonozhkina T. G., Voropaeva N. L., Shachnev N. V., Karpachev V. V.

International Letters of Natural Sciences

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2018

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tom 69

The authors carried out in the fieldwork with a new variety of amaranth «Lipetsky». In order to identify qualitative and quantitative laws of manifestation of the total antioxidant activity of amaranth the leaves were collected in different phases of plant vegetation, dehydrated in mild conditions of air-shadow drying and subsequently dried under harsh conditions 105º C to a constant mass of samples. Testing of plant samples was carried out using a coulometric method of titration (author's method) of free bromine radicals generated in the aquatic environment by plant titrant (water extract dried in the shade at a temperature of 22º±3º C of leaves). It was examined the combined samples of 10 samples of plant leaves of different tiers and of different ages with field plot of 10 ha. Biometric averages of plants during the growing season: growth, the weight of plants, number of leaves, the weight of leaves, stem and inflorescence of the plant are given. This shows the dynamics of total antioxidant activity of leaves of amaranth during the growing season. The thermal stability of the total antioxidant activity (TAA) for combined extracts of 10 samples of leaves of different ages and from different parts of plants when they are drying at 105º C was tested. The dynamics of change, TAA aqueous extracts of the dried amaranth samples with different stages of the growing season corresponds to the previously identified trends in the availability of high quantitative values in the phase of mass budding beginning of flowering and minima in the initial growth phases (3-8 leaves) and ripening of seed for different varieties of amaranth. There were revealed the increase in antioxidant activity upon drying amaranth samples at 105 °C, revealed a new type of qualitative dynamics of TAA, while vegetation with a characteristic quantitative changes by more than 50% for the beginning of the growth phase (the first phase of 3-8 leaves) and the final phase of seed maturation.

9

Ontogeny of gonadotropin action in the rat ovary

100%

Sokka T. A., Hamalainen T. M., Huhtaniemi I. T.

Journal of Physiology and Pharmacology. Supplement

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1992

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tom 43

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nr 1

10

Developmental studies of protein kinases and their substrates in chicken brain

100%

Sanecka-Obacz M., Szyszka R.

Bulletin of the Polish Academy of Sciences. Biological Sciences

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1999

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tom 47

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nr 1

11

Ontogenesis of the Potamogeton flower and fruitlet in SEM research

100%

Toma C.

Acta Societatis Botanicorum Poloniae

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2002

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tom 71

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nr 2

12

Ontogeny of some catecholamines synthetising enzymes in some nuclei of female pigs hypothalamus

100%

Sienkiewicz W.

Folia Morphologica

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1998

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tom 57

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nr 1

13

Selected technologies to control genes and their products for experimental and clinical purposess

100%

Alexander H. K., Booy E. P., Xiao W., Ezzati P., Baust H., Los M.

Archivum Immunologiae et Therapiae Experimentalis

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2007

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tom 55

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nr 3

14

Ontogenesis of the trophic chamber in apple blossom weevil Anthonomus pomorum L. [Coleoptera, Polyphaga]

100%

Swiatek P.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2000

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tom 42

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nr 1

15

The histochemical and ultrastructural investigations of the development and differentiation of the chromaffin tissue of the adrenal glands in grass snake [Natrix natrix L.] during early stages of its ontogenesis

100%

Rupik W.

Acta Biologica Cracoviensia. Series Botanica. Supplement

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2000

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tom 42

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nr 1

16

Development of the atrioventricular junctional area in the human heart

100%

Kozlowski D., Grzybiak M., Owerczuk A., Kozlowska M.

Folia Morphologica

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2001

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tom 60

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nr 1

The structure of the heart has been the subject of many observations since the beginnings of medical research. The first information regarding the existence of the conduction system of the heart was described by Purkinje and regarding the a-v node by Tawara. From the history regarding this structure it seems that this special system, so relevant to today’s invasive cardiologist, is not understood in full. With regards to the interventional electrophysiology on the basis of histological study we decided to evaluate in detail the morphology and the topography of the various portions of the a-v junction. In order to confirm this hypothesis we made observations on the autopsy material of 100 normal human hearts, both sexes from 16 weeks of foetal life to 105 years of age, in which no pathological changes or inborn faults were found. Sections were done containing the heart’s septum, stained using Masson’s method with Goldner’s modification. This research proves that the atrioventricular junction is a stable structure occurring in all hearts, undergoing involutionary changes with age, in which two main parts can be differentiated: the node and the bundle. The morphology of the node is very complex, because it is composed of three zones: the prenodal, the perinodal and the main, differing in cell structure and position. The topography of the node is generally stable, as it lies in the interatrial septum and always above the septal leaflet of the tricuspid valve. The structure of the bundle, in contrast to the node, is more stable and consists of the following parts: the penetrating, the non-branching and the branching. Its topography is also stable, as it lies in the membranous septum, mainly below the septal cusp of the tricuspid valve.

17

Early development of the neocortex in human foetuses aged 9 weeks

100%

Wozniak W., Rapalska K.

Folia Morphologica

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2004

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tom 63

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nr 4

A study was made of human embryos at the end of 8 weeks and foetuses aged 9 weeks. It was shown that at the beginning of the foetal period the cortical plate, which is the primordium of the neocortex, covers the whole surface of the cerebral hemisphere. The plate consists of 8–12 rows of densely packed cells. Below the cortical plate is the subplate.

18

Alcohol dehydrogenase loci of sterile and fertile lines of tomato in the process of ontogenesis

100%

Markova M., Danailov Z., Vodenicharova M.

Acta Physiologiae Plantarum

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2000

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tom 22

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nr 3

19

Morphometry and histology of the thyroid gland in ontogeny of Xenopus laevis [Daudin]

100%

Francois-Krassowska A.

Zoologica Poloniae

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1997

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tom 42

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nr 1-4

20

Five new spathidiids (Ciliophora: Haptoria) from Caribbean tank bromeliads

84%

Foissner W., Wolf K. W., Kumar S., Xu K., Quintela-Alonso P.

Acta Protozoologica

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2014

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tom 53

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nr 2

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