Initiation, Development and Anatomy of Lignotubers in Some Species of Eucalyptus

1984 ◽  
Vol 32 (4) ◽  
pp. 415 ◽  
Author(s):  
DJ Carr ◽  
R Jahnke ◽  
SGM Carr
Keyword(s):  
Analytical Study ◽  
Growth Habit ◽  
Stem Growth ◽  
Morphological Development ◽  
Alternative Pathways ◽  
Stem Wood ◽  
Initial Survey ◽  
And Performance ◽  
Lateral Fusion ◽  
Taxonomic Groups

An initial survey of the diversity of early lignotuber development in Eucalyptus and an analytical study of the anatomy of young lignotubers and the seedling stem are presented. Studies of the early stages of the morphological development of the lignotuber in 13 species, representative of five taxonomic groups, resulted in the recognition of four modes of lignotuber initiation. The importance to lignotuber formation of the presence of a suite of accessory buds, adaxial to the axillary bud, is emphasized but lignotuber initiation is not in all cases associated with these buds. Lignotuber buds are derived by branching from existing buds, ultimately from the accessory buds of the node. Following its initiation, the possibilities of later morphological development of the lignotuber are discussed. Lignotuber growth may dominate over stem growth and the lignotubers at a node may then fuse laterally to encircle the stem. Stem growth, on the other hand, may dominate over lignotuber growth and the lignotuber then appears to regress. The consequences for the growth habit of the plant of these alternative pathways of development are outlined. The wood of young lignotubers (and that of the swollen hypocotyl) is shown to be different in composition and in the sizes of its elements from that of seedling stem wood; these differences owe their origin to differences in the nature and performance of the cambia of the lignotuber and stem. In lateral fusion of the lignotubers at a node, and their upward and downwards extension over the stem, e.g. over the hypocotyl, stem cambial initials are either progressively lost or, more likely, converted to lignotuber-type initials. The possibility of the reverse process occumng in stem dominance is discussed.

scholarly journals Stem growth habit affects leaf morphology and gas exchange traits in soybean

2009 ◽  
Vol 104 (7) ◽  
pp. 1293-1299 ◽  
Author(s):  
Yu Tanaka ◽  
Tatsuhiko Shiraiwa
Keyword(s):  
Gas Exchange ◽  
Leaf Morphology ◽  
Growth Habit ◽  
Stem Growth

scholarly journals Doses of caffeine on the development and performance of pepper crops under greenhouse

2014 ◽  
Vol 32 (4) ◽  
pp. 398-403 ◽  
Author(s):  
Óscar Montes ◽  
Fernando Diánez ◽  
Francisco Camacho
Keyword(s):  
Fruit Quality ◽  
Cycle Performance ◽  
Morphological Development ◽  
Performance Parameters ◽  
Stimulant Effect ◽  
Plant Organs ◽  
Vegetative Plant ◽  
Production Parameters ◽  
Growth Stimulator ◽  
And Performance

A number of experiments on plant organs demonstrated that caffeine acts as a growth stimulator. In this study we aimed to determine the influence of caffeine on development of pepper crops under stress in the autumn-winter cycle, as peppers stop growing and developing in November and January. The experiments were conducted to determine how caffeine applied to the soil by fertigation, with doses of 2.25 µM and 9.00 µM for T1 and T2, respectively, compared to the control crop, affect the morphological development and performance of the pepper crops during two crop cycles (2008-2009 and 2009-2010 in autumn-winter). Throughout the whole vegetative plant cycle, performance parameters of fruit quality and the influence on the morphological development were obtained on different dates. With respect to the remainder of the morphological and production parameters, no significant differences were discovered in either of the evaluated cycles, thus leading to the conclusion that the two doses of caffeine, 2.25 µM and 9.00 µM, did not have any stimulant effect on the development and performance of the pepper crop during both cycles. Total yields were unaffected by either treatment, 4.89, 4.90 and 4.88 kg/m2 for the first assay and 5.28, 5.23 and 5.28 for the second, for treatments control and caffeine dosses 2.25 µM y 9.00 µM respectively.

scholarly journals Molecular mechanisms of flowering under long days and stem growth habit in soybean

2016 ◽  
pp. erw394 ◽  
Author(s):  
Dong Cao ◽  
Ryoma Takeshima ◽  
Chen Zhao ◽  
Baohui Liu ◽  
Abe Jun ◽  
...  
Keyword(s):  
Molecular Mechanisms ◽  
Growth Habit ◽  
Stem Growth

scholarly journals Turbomachinery Characteristics of Brayton-Cycle Space-Power-Generation Systems

1964 ◽  
Author(s):  
Milton G. Kofskey ◽  
Arthur J. Glassman
Keyword(s):  
Power Systems ◽  
Analytical Study ◽  
Design Parameters ◽  
Working Fluid ◽  
Brayton Cycle ◽  
Cycle Space ◽  
And Performance ◽  
Power Outputs ◽  
Power Generation Systems ◽  
Space Power Systems

This paper presents the results of an analytical study of turbomachinery requirements and configurations for Brayton-cycle space-power systems. Basic turbomachinery requirements are defined and typical effects of such system design parameters as power, temperature, pressure and working fluid on turbomachinery geometry and performance are explored. Typical turbomachinery configurations are then presented for systems with power outputs of 10, 100 and 1000 kw.

Implementing Dynamic Headspace With SPME Sampling of Virgin Olive Oil Volatiles: Optimization, Quality Analytical Study, and Performance Testing

2019 ◽  
Vol 67 (7) ◽  
pp. 2086-2097 ◽  
Author(s):  
Celia Oliver-Pozo ◽  
Dimitrios Trypidis ◽  
Ramón Aparicio ◽  
Diego L. García-González ◽  
Ramón Aparicio-Ruiz
Keyword(s):  
Olive Oil ◽  
Analytical Study ◽  
Virgin Olive Oil ◽  
Performance Testing ◽  
Dynamic Headspace ◽  
And Performance

Granadina kid goats v. Segureña lambs: food intake and performance during milk feeding from birth to 60 days

1994 ◽  
Vol 58 (2) ◽  
pp. 257-261 ◽  
Author(s):  
M. R. Sanz Sampelayo ◽  
I. Prieto ◽  
L. Lara ◽  
F. Gil Extremera ◽  
J. Boza
Keyword(s):  
Body Weight ◽  
Dry Matter ◽  
Metabolizable Energy ◽  
Milk Replacer ◽  
Morphological Development ◽  
Apparent Digestibility ◽  
Mean Values ◽  
Energy Retention ◽  
And Performance ◽  
Milk Feeding

AbstractThe morphological development of the sheep and the goat is different and this difference is manifested from early post-natal life. The main characteristic of kid goat carcasses is their low adipose tissue, and this is considered detrimental to quality. In an attempt to determine the nutritional causes of this, a study was performed with kid goats of the Granadina breed and lambs of the Segureña breed. Six kid goats and six lambs were slaughtered at birth, while a further eight kids and eight lambs were fed a milk replacer to satiety until the 60th day of life and slaughtered on the 61st day. Dry matter (DM) and metabolizable energy (ME) intakes and apparent digestibility of energy were determined in four balance periods between 8 and 60 days of life. From the intakes of ME and comparative slaughter data it was possible to calculate energy retention (ER), heat loss (HL) and energy retained as protein (ERp) and as fat (ERf) for kids and lambs. Kid goats showed a similar apparent digestibility of energy to lambs but had lower DM and ME intakes per kg metabolic body weight (M0·75) than lambs. For kids and lambs respectively these values were: 0·93 and 0·94; 45·4 and 50·1 g/kg M0·75 per day; 937 and 1033 kJ/kg M0·75 per day. Mean values for ER, HL, ERp and ERf rates were: 263, 674, 131 and 132 kJ/kg M0·75 per day for kid goats and, 343, 690, 132 and 211 kJ/kg M0·75 per day for lambs. Together with the different intake, kid goats showed a lower rate of ER and overall, a lower rate of ERf than lambs.

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