Growth and development of Pygidiopsis summa in rats and mice with a supplementary note on its morphological characters

1986 ◽  
Vol 24 (1) ◽  
pp. 55 ◽  
Author(s):  
Jong Yil Chai ◽  
Byong Seol Seo ◽  
Soon Hyung Lee ◽  
Sung Tae Hong
Keyword(s):  
Growth And Development ◽  
Morphological Characters ◽  
Supplementary Note ◽  
Rats And Mice

scholarly journals The effect of the photoperiod on the level of endogenous growth regulators in pine (Pinus silvestris L.) seedlings

2014 ◽  
Vol 51 (1) ◽  
pp. 59-70 ◽  
Author(s):  
Krystyna Kriesel ◽  
Sławomir Ciesielska
Keyword(s):  
Abscisic Acid ◽  
Growth And Development ◽  
Morphological Characters ◽  
Axillary Buds ◽  
Pinus Silvestris ◽  
Low Intensity ◽  
Pine Seedlings ◽  
Terminal Bud ◽  
Development Processes ◽  
High Level

The investigations were performed on pine seedlings growing under 12, 16 and 20 hour photoperiods. In 4 succesive stages of seedling development i.e. after 2, 12, 18 and 30 weeks of culture morphological characters of the seedlings were measured and the levels of auxins-, gibberellins-, cytokininsand abscisic acid-like inhibitor were determined. The intensity of growth and development of juvenile leaves, needles and of the shoot was the lowest in plants growing under 12 hour photoperiod conditions. As the length of the photoperiod increased so did the intensity of these processes. Under the 12 hour photoperiod the development of scale leaves, axillary buds and the formation of the terminal bud started earliest. This process reached completion under the 12 hour photoperiod and the bud remained in a state of dormancy. Seedlings growing under the 12 hour photoperiod were characterized by a low level of stimulators, and at the same time by a high level of inhibitors. On the other hand in seedlings grown at 16 and 20 hour photoperiods the content of stimulators was higher and that of inhibitors lower. A high intensity of growth and development processes was correlated with a high level of stimulators while a high level of inhibitors was correlated with a low intensity of these processes.The obtained results suggest the participation of gibberellins and cytokinins in the processes of regulation of the initiation of scale leaves and axillary buds, and the participation of these hormones and of abscisic acid in the regulation of needle elongation.

scholarly journals Jenis-Jenis Jamur Rizosfer dan Jamur Busuk Batang Karet dari Perkebunan Karet (Hevea Brasiliensis Muell Arg.) di Desa Tajok Kayong

2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Sisilia Hainawati Rahmawati, Mukarlina
Keyword(s):  
Growth And Development ◽  
Morphological Characters ◽  
Stem Rot ◽  
Dilution Method ◽  
Microbiology Laboratory ◽  
Plant Growth And Development ◽  
Rubber Plantations ◽  
Rhizosphere Fungi ◽  
Aspergillus Sp ◽  
Planting Method

Rhizosphere is a fungus that plays an important role in the process of plant growth and development. This study aims to determine the morphological characters of rhizosphere fungi in rubber plants and rubber stem rot fungi. Sampling of rhizosphere fungi is carried out in rubber plantations. Tajok Kayong Village, Nanga Tayap District, Ketapang Regency. Isolation, identification was carried out at the Microbiology Laboratory, Faculty of Mathematics and Natural Sciences, Tanjungpura University, from February to June 2018. method of isolation of rhizosphere fungi using dilution method and method of isolation of rubber stem rot fungi by dilution method and direct planting method.  The isolation results showed 7 rhizosphere fungi isolates, namely members of Aspergillus sp. (JTS 5, 6, 7, 8), Mucor sp. (JTS 10), and members of the Penicillium sp. Species. (JTS 2, and  JTS 9), and rubber stem rot fungi, namely members of the species Corticium sp.

scholarly journals The use of rats and mice as animal models inex vivobone growth and development studies

2016 ◽  
Vol 5 (12) ◽  
pp. 610-618 ◽  
Author(s):  
A. A. Abubakar ◽  
M. M. Noordin ◽  
T. I. Azmi ◽  
U. Kaka ◽  
M. Y. Loqman
Keyword(s):  
Animal Models ◽  
Growth And Development ◽  
Development Studies ◽  
Rats And Mice

The growth and development of Corchorus olitorius (L.) grown alone and intercropped with tomato (Lycopersicon esculentum (Mill.))

1987 ◽  
Vol 109 (1) ◽  
pp. 39-45 ◽  
Author(s):  
I. M. Ojeifo ◽  
E. O. Lucas
Keyword(s):  
Lycopersicon Esculentum ◽  
Leaf Area Index ◽  
Leaf Area ◽  
Growth And Development ◽  
Morphological Characters ◽  
Corchorus Olitorius ◽  
Economic Returns ◽  
Area Index ◽  
Maximum Value ◽  
Significant Difference

SummaryTwo experiments were conducted on two varieties of Corchorus olitorius(‘NHCo 6’ and ‘NHCo 7’). The first one was on the effect of density of planting on their growth and development whilst the second was on the best planting ratio for Corchorus-tomato intercropping.There was no significant difference in morphological characters of the two varieties. The maximum value of leaf area index for the two varieties was around 3. Maximum marketable and edible yields were obtained for the two varieties at 30 × 5 cm (666600 plants/ha) and the best time for harvesting was 44 days after sowing.The best planting ratio for Corchorus-tomato intercrop was 2 rows of Corchorus and 1 row of tomato for maximum edible yield of Corchorus but for maximum economic returns, the best ratio was 1 row of Corchorus to 2 rows of tomato.

scholarly journals Impact and Assessment of Engineered Metallic Nano-oxide on the Growth and Development of Gossypium hirsutum L.

2021 ◽  
Author(s):  
Gaurav Sharma ◽  
Anupriya Rana ◽  
Asha Sharma
Keyword(s):  
Gossypium Hirsutum ◽  
Copper Oxide ◽  
Titanium Oxide ◽  
Growth And Development ◽  
Morphological Characters ◽  
Growth Patterns ◽  
Titanium Oxides ◽  
Zinc Oxides ◽  
Nano Oxide ◽  
Positive Growth

Background: Metallic nano-oxide has been influenced the environment in the past two decades. Their consequences are dreadfully uncertain. The increased graph of their interference suggested many extensive studies in various fields of the environment. The Gossypium hirsutum one of the prime harvest plants in India has been chosen for studying the impacts of metallic nano-oxide on their morphological characters as well as their fresh shoot and root weights. Methods: Study has been done in July 2020 as a randomized triplet. The need for the study was fulfilled by the four different metallic nano-oxides with their five specific concentrations. The metallic nano-oxides were titanium oxide, silver oxide, copper oxide and zinc oxide. The five concentrations 00 ppm, 40 ppm, 60 ppm, 80 ppm and 100 ppm were taken from each one of metallic nano-oxide. Result: The zinc oxides treatment gave noteworthy positive growth and development in Gossypium hirsutum from germination to the blossoming time. Conversely, the concentrations of silver oxides were found little toxic for the growth of species. The copper and titanium oxides indicated little diversity in their growth patterns. The germination studies calculated best with titanium oxide treatment. The 80ppm concentration of copper oxide also reported better results at germination in comparison to control.

Growth and Development of Five Populations of Themeda australis in Response to Temperature

1975 ◽  
Vol 23 (6) ◽  
pp. 951 ◽  
Author(s):  
RH Groves
Keyword(s):  
High Temperatures ◽  
Low Temperatures ◽  
Growth And Development ◽  
Temperature Response ◽  
Morphological Characters ◽  
Photoperiodic Response ◽  
Ecological Significance ◽  
Temperature Regimes ◽  
Eastern Australia ◽  
Response To Temperature

Five populations of the widespread indigenous grass Themeda australis were selected from sites in south-eastern Australia with different temperature regimes. Differences between populations in some morphological characters are reported for plants grown in a uniform environment. In one experiment shoot and root temperatures were varied together: in a second, root tempera- ture only was varied and shoot temperature kept constant. Results of both experiments show that there were few significant differences between populations in the number of tillers per plant formed at the various temperatures. Deniliquin plants had the greatest leaf area of all populations. Time to anthesis differed between some populations and these differences could be related to the temperature regimes of the sites of origin. Plants from Tantangara, the coldest site, flowered first and uniformly at low temperatures, and plants from Deniliquin, where the summer (flowering) temperatures are highest, flowered last at low temperatures but first and uniformly at high temperatures. There were no differences between populations when mature post-flowering plants were subjected to low temperatures as radiation frosts but, when seedlings were frosted, the Adelaide Hills popula- tion from the most frost-free site was more frost-sensitive at - 6°C than all other populations. It is concluded that genetic differentiation of ecological significance within the taxon T. australis has occurred not only for the photoperiodic response reported previously but also for a temperature response to flowering. While no differentiation has been shown for growth at medium and high temperatures, a difference is reported in the ability of one population to withstand a minimal temperature of - 6° as frost.

scholarly journals Patterns of development of advanced clonal apple rootstocks of the Michurinsk State Agrarian University selection in the mother plantation

2020 ◽  
Vol 23 ◽  
pp. 01004
Author(s):  
Maxim L. Dubrovsky ◽  
Andrey V. Kruzhkov ◽  
Nataliya L. Churikova ◽  
Roman V. Papikhin ◽  
Galina S. Usova
Keyword(s):  
Growth And Development ◽  
Leaf Surface ◽  
Morphological Characters ◽  
High Yield ◽  
Significant Heterogeneity ◽  
Apple Rootstocks ◽  
Genetic Origin ◽  
Development Indicators ◽  
Hybrid Plants ◽  
University Selection

This paper reveals main patterns of development of advanced clonal apple rootstocks of the Michurinsk State Agrarian University selection in the mother plantation. The studied growth and development indicators of shoots, as well as the level of their rooting in 40 genotypes, demonstrate significant heterogeneity of hybrid plants, which is due to their different genetic origin and the associated unequal growth force of parent shrubs. Correlations between the main quantitative morphological characters of parent shrubs of the studied genotypes were revealed. An interrelation of the height of the parent shrub and the area of its leaf surface is noted - on the expectation of 0.71 shoot; for the entire uterine shrub – of 0.45; between the output of standard layering from the shrub and the average rooting score (at 0.72). Promising clonal rootstocks with high yield indices in the mother plantation have been identified.

Anchoring Fibrils in Arterial Endothelium

1969 ◽  
Vol 27 ◽  
pp. 274-275
Author(s):  
A. Trillo
Keyword(s):  
Carotid Arteries ◽  
Animal Species ◽  
Cell Layer ◽  
Present Communication ◽  
Internal Elastic Lamina ◽  
Endothelial Cell Layer ◽  
Structural Details ◽  
Rats And Mice ◽  
Arterial Endothelium ◽  
Elastic Lamina

There are conflicting reports regarding some fine structural details of arteries from several animal species. Buck denied the existence of a sub-endothelial space, while Karrer and Keech described a space of variable width which separates the endothelium from the underlying internal elastic lamina in aortas of aging rats and mice respectively.The present communication deals with the ultrastrueture of the interface between the endothelial cell layer and the internal elastic lamina as observed in carotid arteries from rabbits of varying ages.

An ultrastructural study of vegetative incompatibility in plants

1978 ◽  
Vol 36 (2) ◽  
pp. 436-437
Author(s):  
Randy Moore
Keyword(s):  
Ultrastructural Study ◽  
Cell Walls ◽  
Growth And Development ◽  
Solanum Pennellii ◽  
Initial Product ◽  
Basic Aspect ◽  
Tissue Interactions ◽  
Graft Interface ◽  
Antigen Antibody ◽  
Standard Fixation

Cell and tissue interactions are a basic aspect of eukaryotic growth and development. While cell-to-cell interactions involving recognition and incompatibility have been studied extensively in animals, there is no known antigen-antibody reaction in plants and the recognition mechanisms operating in plant grafts have been virtually neglected.An ultrastructural study of the Sedum telephoides/Solanum pennellii graft was undertaken to define possible mechanisms of plant graft incompatibility. Grafts were surgically dissected from greenhouse grown plants at various times over 1-4 weeks and prepared for EM employing variations in the standard fixation and embedding procedure. Stock and scion adhere within 6 days after grafting. Following progressive cell senescence in both Sedum and Solanum, the graft interface appears as a band of 8-11 crushed cells after 2 weeks (Fig. 1, I). Trapped between the buckled cell walls are densely staining cytoplasmic remnants and residual starch grains, an initial product of wound reactions in plants.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

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