Role of mycorrhizal infection in the growth and reproduction of wild vs. cultivated plants

Oecologia ◽  
1990 ◽  
Vol 84 (1) ◽  
pp. 82-92 ◽  
Author(s):  
David R. Bryla ◽  
Roger T. Koide
Keyword(s):  
Cultivated Plants ◽  
Mycorrhizal Infection ◽  
Growth And Reproduction

Role of mycorrhizal infection in the growth and reproduction of wild vs. cultivated plants

Oecologia ◽  
1988 ◽  
Vol 77 (4) ◽  
pp. 537-543 ◽  
Author(s):  
Roger Koide ◽  
Mingguang Li ◽  
James Lewis ◽  
Cherie Irby
Keyword(s):  
Cultivated Plants ◽  
Mycorrhizal Infection ◽  
Growth And Reproduction

scholarly journals The Role of Inferent Hormones on Gonad Maturity Index and Growth of Ambon Betok Fish (Chrysiptera cyanea)

2020 ◽  
Vol 13 (2) ◽  
pp. 160
Author(s):  
Melani Andi ◽  
Muhammad Irfan ◽  
Juharni Juharni
Keyword(s):  
Fish Farming ◽  
Maturity Index ◽  
Fish Reproduction ◽  
Gonad Maturity ◽  
Growth And Survival ◽  
Living Things ◽  
Reproduction Process ◽  
Growth And Reproduction

One type of marine ornamental fish that can be developed through cultivation is betok Ambon fish. Cultivation of this fish is quite profitable, and easy to maintain. To maintain the sustainability and sustainability of Betok Ambon fish farming, one way to take is to understand and know the growth and reproduction aspects of this type of fish through the provision of inferent hormones appropriately. Review article This aims to reveal the role of the inferent hormone on the aspects of reproduction and growth of Betok Ambon fish. Reproduction is the reproduction process in living things including Betok Ambon fish. The number of eggs produced by Betok Ambon fish varies between 900 and 3,500. Inferent hormone is one type of reproductive hormone that functions to spur and accelerate the level of gonad maturity in animals including fish. The determination of the inferent hormone dosage is based on the determination of the inferent dose in fish, generally around 10 mg - 80 mg or about 0.1 ml - 0.8 ml. Generally, fish that are given inferent hormone at a dose of 40-60 mg / l can increase the gonad maturity index by 25%, in betok Ambon fish by 30%. Inferent hormone doses around 20-40 mg can increase the growth and survival of ambon betok fish.

scholarly journals PERANAN TUMBUHAN LIAR DALAM KONSERVASI SERANGGA PENYERBUK ORDO HYMENOPTERA

2016 ◽  
Vol 10 (2) ◽  
pp. 195
Author(s):  
Erniwati Erniwati ◽  
Sih Kahono
Keyword(s):  
Flowering Time ◽  
Food Resources ◽  
Wild Plants ◽  
Cultivated Plants ◽  
Applied Study ◽  
Insect Pollinators ◽  
Cultivated Plant ◽  
Dry Seasons

The role of the wild plants in relation to the conservation of the Indonesian insectpollinators was studied at several areas of Java. Three of direct observationmethods were applied: study of biodiversity and observation on the wild flowersand the insect pollinators as well, and the behaviour of the insects. The flowersof wild plants were relatively smaller and paler in colour, however they were moreattractive to insect pollinators than cultivated plants. Flowering time of the wildplants was mostly during wet seasons, contrary to that of the cultivated plantswhich was mostly during dry seasons. Our observation indicated that these wildplants are the food resources of insect pollinators during wet seasons. Observationdata support the importance of wild plants to supply food to insect pollinatorsduring wet seasons. Management of wild and cultivated plant environments isnecessary to conserve insect pollinators.

Cropmarks used in aerial archaeology as special spatial indicators of soil features potentially applicable in soil mapping

2021 ◽  
Author(s):  
Mátyás Árvai ◽  
Zoltán Czajlik ◽  
János Mészáros ◽  
Balázs Nagy ◽  
László Pásztor
Keyword(s):  
Soil Properties ◽  
Auxiliary Information ◽  
Cultivated Plants ◽  
Soil Features ◽  
Random Forest Models ◽  
Kolmogorov Smirnov ◽  
Using Data ◽  
Definition Of ◽  
New Research

<p>Cropmarks are a major factor in the effectiveness of traditional aerial archaeology. The positive and negative features shown up by cropmarks are the role of the different cultivated plants and the importance of precipitation and other elements of the physical environment. In co-operation with the experts of the Eötvös Loránd University a new research was initiated to compare the pedological features of cropmark plots (CMP) and non-cropmark plots (nCMP) in order to identify demonstrable differences between them. For this purpose, the spatial soil information on primary soil properties provided by DOSoReMI.hu was employed. To compensate for the inherent vagueness of spatial predictions, together with the fact that the definition of CMPs and nCMPs is somewhat indefinite, the comparisons were carried out using data-driven, statistical approaches. In the first round three pilot areas were investigated, where Chernozem and Meadow type soils proved to be correlated with the formation of cropmarks. Kolmogorov-Smirnov tests and Random Forest models showed a different relative predominance of pedological variables in each study area. The geomorphological differences between the study areas explain these variations satisfactorily. In the next round, the identified relationships between cropmarking and soil features are planned to be utilized in the spatial inference of soil properties, where crop-marking sites will represent a unique, spatially non-exhaustive auxiliary information.</p>

Individual Growth and Reproduction

2019 ◽  
pp. 38-56
Author(s):  
Ken H. Andersen
Keyword(s):  
Life History ◽  
Growth Model ◽  
Life Histories ◽  
Maximum Size ◽  
Individual Growth ◽  
Energy Budgets ◽  
Asymptotic Size ◽  
The Individual ◽  
Growth And Reproduction

This chapter develops descriptions of how individuals grow and reproduce. More specifically, the chapter seeks to determine the growth and reproduction rates from the consumption rate, by developing an energy budget of the individual as a function of size. To that end, the chapter addresses the question of how an individual makes use of the energy acquired from consumption. It sets up the energy budgets of individuals by formulating the growth model using so-called life-history invariants, which are parameters that do not vary systematically between species. While the formulation of the growth model in terms of life-history invariants is largely successful, there is in particular one parameter that is not invariant between life histories: the asymptotic size (maximum size) of individuals in the population. This parameter plays the role of a master trait that characterizes most of the variation between life histories.

Thermoregulation, growth, and reproduction in Alaskan collared lemmings: role of short day and cold

1991 ◽  
Vol 261 (3) ◽  
pp. R522-R530 ◽  
Author(s):  
H. A. Maier ◽  
D. D. Feist
Keyword(s):  
Food Intake ◽  
Thermal Conductance ◽  
Reproductive Condition ◽  
Reproductive Morphology ◽  
Short Day ◽  
Long Day ◽  
Dicrostonyx Groenlandicus ◽  
Before And After ◽  
Growth And Reproduction

To assess factors controlling seasonal thermoregulatory and reproductive changes, collared lemmings (Dicrostonyx groenlandicus) were exposed for 16 wk to long day (LD, 22 h light: 2 h dark) and warm (15 +/- 3 degrees C), LD and cold (1 +/- 0.5 degrees C), short day (SD, 4 h light: 20 h dark) and warm, SD and cold or acclimatized to outdoor winter conditions (OUT). Hair length and color, body mass, and food intake were monitored weekly. Resting metabolic rates (RMR) and nonshivering thermogenesis (NST) were estimated several times by measuring oxygen consumption before and after norepinephrine injections. Body composition and reproductive condition were determined at the end of the experiment. SD and OUT groups had a 15.8% lower (P less than 0.01) RMR at 7 degrees C than the LD groups. Lower thermal conductance in SD and OUT animals appears due to molt to white winter pelage, which occurred by week 3 in SD but not in LD groups. Neither SD, cold, nor OUT altered NST or reproductive morphology. SD-exposed lemmings showed 19.2% greater growth than those in LD, resulting primarily from a 29.2 and 15.0% increase in lean and ash components, respectively. Cold exposure increased food intake by 34.7%. Results suggest that the pineal gland, which mediates SD effects, may influence molt and growth but not NST or reproductive morphology.

scholarly journals Genome analyses of a placozoan rickettsial endosymbiont show a combination of mutualistic and parasitic traits

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kai Kamm ◽  
Hans-Jürgen Osigus ◽  
Peter F. Stadler ◽  
Rob DeSalle ◽  
Bernd Schierwater
Keyword(s):  
Amino Acids ◽  
Environmental Conditions ◽  
Metabolic Pathways ◽  
Essential Amino Acids ◽  
Intracellular Bacteria ◽  
The Novel ◽  
Symbiotic Relationships ◽  
Genome Analyses ◽  
Growth And Reproduction

AbstractSymbiotic relationships between eukaryotic hosts and bacteria range from parasitism to mutualism and may deeply influence both partners’ fitness. The presence of intracellular bacteria in the metazoan phylum Placozoa has been reported several times, but without any knowledge about the nature of this relationship and possible implications for the placozoan holobiont. This information may be of crucial significance since little is known about placozoan ecology and how different species adapt to different environmental conditions, despite being almost invariable at the morphological level. We here report on the novel genome of the rickettsial endosymbiont of Trichoplax sp. H2 (strain “Panama”). The combination of eliminated and retained metabolic pathways of the bacterium indicates a potential for a mutualistic as well as for a parasitic relationship, whose outcome could depend on the environmental context. In particular we show that the endosymbiont is dependent on the host for growth and reproduction and that the latter could benefit from a supply with essential amino acids and important cofactors. These findings call for further studies to clarify the actual benefit for the placozoan host and to investigate a possible role of the endosymbiont for ecological separation between placozoan species.

Interannual variability of growth and reproduction inBursera simaruba: the role of allometry and resource variability

Ecology ◽  
2012 ◽  
Vol 93 (1) ◽  
pp. 180-190 ◽  
Author(s):  
Catherine M. Hulshof ◽  
James C. Stegen ◽  
Nathan G. Swenson ◽  
Carolyn A. F. Enquist ◽  
Brian J. Enquist
Keyword(s):  
Interannual Variability ◽  
Resource Variability ◽  
Growth And Reproduction
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