scholarly journals Growth and development of shoot apex in barley. III. Study of growth rate variation by means of the growth tensor

2014 ◽  
Vol 57 (1) ◽  
pp. 31-50 ◽  
Author(s):  
Zygmunt Hejnowicz ◽  
Jerzy Nakielski ◽  
Wiesław Włoch ◽  
Marek Bełtowski
Keyword(s):  
Growth Rate ◽  
Growth And Development ◽  
Relative Rate ◽  
Dome Height ◽  
Rate Variation ◽  
Prolate Spheroidal ◽  
Meridional Displacement ◽  
Packet Length ◽  
Generative Phase ◽  
Growth Rate Distribution

Silhouette of the shoot apical dome of barley does not change in time during early generative phase, although the dome height varies cyclically and increases in successive plastochrons. The elongation is limited to the dome region, the young frusta do not elongate. Relative rate of elongation (per plastochron) of the dome as a whole, decreases with increasing dome height. In the protoderm there are packets of cells distinguished by thicker walls. The growth tensor in prolate spheroidal coordinate system was applied to analysis of growth rate distribution within the dome. The meridional displacement velocities on dome surface, which are needed for the analysis, were determined on the basis of cell packet length expressed as a position function. Maximum relative elemental rate of growth occurs in subdistal zone.

scholarly journals Growth and development of shoot apex in barley II. Distribution of growth rates during vegetative phase

2014 ◽  
Vol 49 (1-2) ◽  
pp. 33-48 ◽  
Author(s):  
Zygmunt Hejnowicz ◽  
Wiesław Włoch
Keyword(s):  
Growth Rate ◽  
Shoot Apex ◽  
Growth And Development ◽  
Distal Part ◽  
Relative Rate ◽  
Volume Growth ◽  
Leaf Primordia ◽  
Relative Growth ◽  
Apical Dome ◽  
The Mean

The changes in the volume of the apical dome and of the frusta indicate that the mean relative rate of volume growth of the whole apical dome is much higher than in the first frustum which, in turn, grows much faster than the next one. It was found in studies of the distribution of mitoses and of cell arrangement that the volume relative growth rate of the distal part of the apical dome is at least 5-10 times slower than that at the level of new leaf primordia initiation.

ФОРМИРОВАНИЕ ПЕРЕХОДНОГО СЛОЯ ALN НА ТЕМПЛЕЙТАХ 3С-SIC/SI(111) МЕТОДОМ АММИАЧНОЙ МОЛЕКУЛЯРНО-ЛУЧЕВОЙ ЭПИТАКСИИ

2020 ◽  
Vol 96 (3s) ◽  
pp. 148-153
Author(s):  
С.Д. Федотов ◽  
А.В. Бабаев ◽  
В.Н. Стаценко ◽  
К.А. Царик ◽  
В.К. Неволин
Keyword(s):  
Crystal Structure ◽  
Growth Rate ◽  
Low Temperature ◽  
Surface Morphology ◽  
Single Crystal ◽  
Root Mean Square Roughness ◽  
Rate Variation ◽  
Mean Square ◽  
Nucleation Layer ◽  
Low Temperature Epitaxy

Представлены результаты изучения морфологии поверхности и структуры слоев AlN, сформированных аммиачной МЛЭ на темплейтах 3C-SiC/Si(111) on-axis- и 4° off-axis-разориентации. Опробован технологический режим низкотемпературной эпитаксии зародышевого слоя AlN на поверхности 3C-SiC(111). Среднеквадратичная шероховатость поверхности (5 х 5 мкм) слоев AlN толщиной 150 ± 50 нм составила 2,5-3,5 нм на темплейтах 3C-SiC/Si(111) on-axis и 3,3-3,5 нм на 4° off-axis. Показано уменьшение шероховатости смачивающего слоя AlN при изменении скорости роста. Получены монокристаллические слои AlN(0002) со значениями FWHM (ω-геометрия) 1,4-1,6°. The paper presents the surface morphology and crystal structure of AlN layers formed by ammonia MBE on 3C-SiC/Si(111) on-axis and 4° off-axis disorientation. It offers the technological approach of low-temperature epitaxy of the AlN nucleation layer on the 3C-SiC (111) surface. Root mean square roughness (5 х 5 |xm) of AlN layers with thickness of 150 ± 50 nm was 2,5-3,5 nm onto on-axis templates and 3.3-3.5 nm onto 4° off-axis. It appears that the RMS roughness of the AlN surface is changing with the growth rate variation. Single-crystal AlN(0002) layers with FWHM values (ω-geometry) of 1.4-1.6° have been obtained.

scholarly journals Release of Postsenescent Dormancy in Leafy Spurge (Euphorbia esula) by Chilling

Weed Science ◽  
1988 ◽  
Vol 36 (6) ◽  
pp. 784-786 ◽  
Author(s):  
Stephen J. Harvey ◽  
Robert M. Nowierski
Keyword(s):  
Growth Rate ◽  
North America ◽  
Growth And Development ◽  
Leafy Spurge ◽  
Climatic Conditions ◽  
Euphorbia Esula ◽  
Flower Buds ◽  
Significant Growth ◽  
Number Of Stems

The growth and development of leafy spurge (Euphorbia esulaL. #3EPHES) collected during postsenescent dormancy and grown in the greenhouse was increasingly stimulated by chilling treatments longer than 14 days duration at 0 to 6 C. Production of stems with flower buds, primary flowers, and secondary flowers was greater in plants chilled for 42 days or more. The effects of chilling on total number of stems, number of strictly vegetative stems, or number of stems with vegetative branching were not significant. The height of the tallest stem per pot was influenced by chilling longer than 42 days. Growth rate also increased as a function of chilling duration. Based on our findings, we believe that there is little possibility that any significant growth can occur in the postsenescent period because of the prevailing climatic conditions found in areas of leafy spurge distribution in North America.

Disentangling the role of competition, light interception, and functional traits in tree growth rate variation in South Asian tropical moist forests

2021 ◽  
Vol 483 ◽  
pp. 118908
Author(s):  
Mizanur Rahman ◽  
Masum Billah ◽  
Md Obydur Rahman ◽  
Debit Datta ◽  
Muhammad Ahsanuzzaman ◽  
...  
Keyword(s):  
Growth Rate ◽  
Functional Traits ◽  
South Asian ◽  
Tree Growth ◽  
Light Interception ◽  
Rate Variation ◽  
Tree Growth Rate

The effect of nursery substrate and fertilization on the growth and ectomycorrhizal status of containerized and outplanted seedlings of Picea abies

2009 ◽  
Vol 39 (1) ◽  
pp. 64-75 ◽  
Author(s):  
Lu-Min Vaario ◽  
Arja Tervonen ◽  
Kati Haukioja ◽  
Markku Haukioja ◽  
Taina Pennanen ◽  
...  
Keyword(s):  
Growth Rate ◽  
Picea Abies ◽  
Norway Spruce ◽  
Growth And Development ◽  
Organic Fertilizer ◽  
Wood Fibre ◽  
Organic Fertilizers ◽  
Relative Growth ◽  
Ecm Fungi ◽  
Influence Of Substrate

Over a 5 year period, we examined the influence of substrate and fertilization on nursery growth and outplanting performance of Norway spruce (Picea abies (L.) Karst.). We focused on the relative growth and development of roots and shoots and the colonization intensity and diversity of ectomycorrhizal (ECM) fungi. In the nursery, a conventional substrate (low-humified Sphagnum peat) supplemented with woody material (wood fibre and pine bark) and either mineral or organic fertilizers yielded shorter seedlings than those grown on the unmodified substrate. However, after outplanting, the growth rate of seedlings cultivated on modified substrates was higher than that of seedlings grown on the unmodified substrate. Seedlings cultivated in modified substrates had significantly higher root/shoot ratios and ECM diversity; the latter remained significant after ≥3 years of outplanting. Seedlings grown on a substrate containing 50% woody material and supplemented with organic fertilizer had the highest growth rate among all seedlings during the 3 year period of outplanting. Colonization intensity of ECM fungi was high in all seedlings except for those grown in heavily fertilized substrate. This study suggests that nursery techniques that produce seedlings with higher root/shoot ratios and ECM diversities could improve plantation success and growth rate for at least the first 3 years of outplanting.

scholarly journals Feed demand behavior in sea bass juveniles: Effects on individual specific growth rate variation and health (inter-individual and inter-group variation)

Aquaculture ◽  
2008 ◽  
Vol 274 (1) ◽  
pp. 87-95 ◽  
Author(s):  
S. Millot ◽  
M.-L. Bégout ◽  
J. Person-Le Ruyet ◽  
G. Breuil ◽  
C. Di-Poï ◽  
...  
Keyword(s):  
Growth Rate ◽  
Specific Growth Rate ◽  
Specific Growth ◽  
Sea Bass ◽  
Rate Variation ◽  
Group Variation

scholarly journals Do firms share the same functional form of their growth rate distribution? A statistical test

2014 ◽  
Vol 39 ◽  
pp. 140-164 ◽  
Author(s):  
José T. Lunardi ◽  
Salvatore Miccichè ◽  
Fabrizio Lillo ◽  
Rosario N. Mantegna ◽  
Mauro Gallegati
Keyword(s):  
Growth Rate ◽  
Functional Form ◽  
Statistical Test ◽  
Rate Distribution ◽  
Growth Rate Distribution

A Scientometric Mapping of Contributions to Journal of Computer Science and Technology during 2012-2016

2018 ◽  
Vol 8 (1) ◽  
pp. 52-56
Author(s):  
Vimlesh Patel
Keyword(s):  
Growth Rate ◽  
Computer Science ◽  
Geographical Distribution ◽  
Growth And Development ◽  
Web Of Science ◽  
Science And Technology ◽  
Authorship Pattern ◽  
Chinese Academy Of Sciences ◽  
Prolific Authors ◽  
Academy Of Sciences

The paper presents a Scientometrics mapping of papers published inJournal of Computer Science and Technology, during 2012 to 2016 as reflected in Web of Science database. It attempts to analyze the growth and development of publications output of Journal of Computer Science and Technologyas reflected. Data for a total of 485 have been downloaded and analysed according to objectives. The study reveals thatThe year wise growth rate revel that highest no. papers published in 2015, No. of Papers: 106 (21.86%) Authorship pattern data reveals that most of the authors like to publish papers in collaborations and most preferred authorship pattern was four author i.e. no. publications for four authors were 125 (25.77 %). The Degree of Collaboration (DC) revel that DC is found highest in 0.95 Co-Authored Publication. The highly prolific authors and their publications revel that Zhang L, published highest numbers of papers (11 nos.), the geographical distribution contributions (International) is revel that Peoples R China is in the top with no. of publications is 371 (76.50%), it is found from institution-wise distribution of papers that highest contributed institutions was Chinese Academy of Sciences with 93 Publications (19.18%) is placed at 1st rank and the average of citations per year (2012-2016) were 205.

Intraracial variation in Phytophthora infestans, and its relationship to different host varieties

1969 ◽  
Vol 47 (6) ◽  
pp. 863-867 ◽  
Author(s):  
Alan Upshall
Keyword(s):  
Growth Rate ◽  
Comparative Study ◽  
Phytophthora Infestans ◽  
Resistant Variety ◽  
Rate Variation ◽  
Low Field

A comparative study of the magnitude of growth rate variation among isolates of Phytophthora infestans (Mont.) de Bary taken from a high and a low field resistant variety of potato has shown it to be greater in the former than in the latter, even though both crops were infected by the same population of the pathogen. Competition between spores, and adaptation to the varieties, are put forward as possible alternative explanations.

Low temperature effects on the growth of evening primrose (Oenothera spp.) rosettes

2004 ◽  
Vol 52 (1) ◽  
pp. 19-28
Author(s):  
A. F. Fieldsend
Keyword(s):  
Growth Rate ◽  
Leaf Area ◽  
Relative Growth Rate ◽  
Relative Rate ◽  
Field Trials ◽  
Effect Of Temperature ◽  
Relative Growth ◽  
Evening Primrose ◽  
Intermittent Exposure ◽  
Environment Experiment

In field crops of evening primrose (Oenothera spp.) the post-winter growth of rosettes is slow to re-start. The effect of temperature on the growth of rosettes was assessed in a controlled environment experiment. Relative growth rate was positively correlated with temperature, but in apparent contrast to the results from field trials, the rosettes grew at constant temperatures as low as 6.5ºC. However, following transfer to warmer temperatures an increase in relative growth rate did not occur until 7-10 days later, whilst a change to a cooler environment caused an immediate reduction in relative growth rate. Thus, it seems likely that growth is inhibited by intermittent exposure to temperatures of 0°C or below. Partitioning of biomass between root and shoot was independent of temperature, but at 6.5ºC the relative rate of leaf area increase was very low. Consequently, the specific leaf area was lower in rosettes growing at lower temperatures.

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