scholarly journals Anything New under the Sun? An Update on Modulation of Bioactive Compounds by Different Wavelengths in Agricultural Plants

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1485
Author(s):  
Marco Santin ◽  
Annamaria Ranieri ◽  
Antonella Castagna
Keyword(s):  
Energy Source ◽  
Secondary Metabolites ◽  
Mode Of Action ◽  
Adaptation Strategy ◽  
Plant Metabolism ◽  
The Sun ◽  
Light Conditions ◽  
Signalling Cascades ◽  
Agricultural Plants ◽  
Activate Complex

Plants continuously rely on light as an energy source and as the driver of many processes in their lifetimes. The ability to perceive different light radiations involves several photoreceptors, which in turn activate complex signalling cascades that ultimately lead to a rearrangement in plant metabolism as an adaptation strategy towards specific light conditions. This review, after a brief summary of the structure and mode of action of the different photoreceptors, introduces the main classes of secondary metabolites and specifically focuses on the influence played by the different wavelengths on the content of these compounds in agricultural plants, because of their recognised roles as nutraceuticals.

Much Ado about (Practically) Nothing

2010 ◽  
Author(s):  
David Fisher
Keyword(s):  
Energy Source ◽  
Atomic Nucleus ◽  
The Sun ◽  
Scientific Journals ◽  
Rare Gases ◽  
Important Work ◽  
The Earth ◽  
Wide Range ◽  
Life On Mars ◽  
The Universe

There are eight columns in the Periodic Table. The eighth column is comprised of the rare gases, so-called because they are the rarest elements on earth. They are also called the inert or noble gases because, like nobility, they do no work. They are colorless, odorless, invisible gases which do not react with anything, and were thought to be unimportant until the early 1960s. Starting in that era, David Fisher has spent roughly fifty years doing research on these gases, publishing nearly a hundred papers in the scientific journals, applying them to problems in geophysics and cosmochemistry, and learning how other scientists have utilized them to change our ideas about the universe, the sun, and our own planet. Much Ado about (Practically) Nothing will cover this spectrum of ideas, interspersed with the author's own work which will serve to introduce each gas and the important work others have done with them. The rare gases have participated in a wide range of scientific advances-even revolutions-but no book has ever recorded the entire story. Fisher will range from the intricacies of the atomic nucleus and the tiniest of elementary particles, the neutrino, to the energy source of the stars; from the age of the earth to its future energies; from life on Mars to cancer here on earth. A whole panoply that has never before been told as an entity.

The sun, our future energy source

Solar Energy ◽  
1980 ◽  
Vol 24 (5) ◽  
pp. 515-516
Author(s):  
Frank Kreith
Keyword(s):  
Energy Source ◽  
The Sun

Solar Flux and Molecular Absorption

1999 ◽  
Author(s):  
Yuk L. Yung ◽  
William B. DeMore
Keyword(s):  
Energy Source ◽  
Solar Wind ◽  
Cross Sections ◽  
Electronic Excitation ◽  
Extreme Ultraviolet ◽  
Resonance Scattering ◽  
Planetary Atmospheres ◽  
The Sun ◽  
Atoms And Molecules ◽  
Planetary Rotation

In this book we are concerned primarily with disequilibrium chemistry, of which the sun is the principal driving force. The sun is not, however, the only source of disequilibrium chemistry in the solar system. We briefly discuss other minor energy sources such as the solar wind, starlight, precipitation of energetic particles, and lightning. Note that these sources are not independent. For example, the ultimate energy source of the magnetospheric particles is the solar wind and planetary rotation; the energy source for lightning is atmospheric winds powered by solar irradiance. Only starlight and galactic cosmic rays are completely independent of the sun. While the sun is the energy source, the atoms and molecules in the planetary atmospheres are the receivers of this energy. For atoms the interaction with radiation results in three possibilities: (a) resonance scattering, (b) absorption followed by fluorescence, and (c) ionization. lonization usually requires photons in the extreme ultraviolet. The interaction between molecules and the radiation field is more complicated. In addition to the above (including Rayleigh and Raman scattering) we can have (d) dissociation, (e) intramolecular conversion, and (f) vibrational and rotational excitation. Note that processes (a)-(e) involve electronic excitation; process (f) usually involves infrared radiation that is not energetic enough to cause electronic excitation. The last process is important for the thermal budget of the atmosphere, a subject that is not pursued in this book. Scattering and fluorescence are a source of airglow and aurorae and provide valuable tools for monitoring detailed atomic and molecular processes in the atmosphere. Processes (c) and (d) are most important for determining the chemical composition of planetary atmospheres. Interesting chemical reactions are initiated when the absorption of solar energy leads to ionization or the breaking of chemical bonds. In this chapter we provide a survey of the absorption cross sections of selected atoms and molecules. The selection is based on the likely importance of these species in planetary atmospheres.

scholarly journals Trichoderma Secondary Metabolites that Affect Plant Metabolism

2012 ◽  
Vol 7 (11) ◽  
pp. 1934578X1200701 ◽  
Author(s):  
Francesco Vinale ◽  
Krishnapillai Sivasithamparam ◽  
Emilio L. Ghisalberti ◽  
Michelina Ruocco ◽  
Sheridan Woo ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Plant Growth ◽  
Biological Activities ◽  
Plant Metabolism ◽  
Growth Promoters ◽  
Plant Host ◽  
Trichoderma Spp ◽  
Positive Effects ◽  
Complex Interactions ◽  
Plant Growth Promoters

Recently, there have been many exciting new developments relating to the use of Trichoderma spp. as agents for biocontrol of pathogens and as plant growth promoters. Several mechanisms have been proposed to explain the positive effects of these microorganisms on the plant host. One factor that contributes to their beneficial biological activities is related to the wide variety of metabolites that they produce. These metabolites have been found not only to directly inhibit the growth and pathogenic activities of the parasites, but also to increase disease resistance by triggering the system of defence in the plant host. In addition, these metabolites are also capable of enhancing plant growth, which enables the plant to counteract the disease with compensatory vegetative growth by the augmented production of root and shoot systems. This review takes into account the Trichoderma secondary metabolites that affect plant metabolism and that may play an important role in the complex interactions of this biocontrol agent with the plant and pathogens.

Development of Advanced Combustor for Biomass

2011 ◽  
Author(s):  
Masato Urashima ◽  
Shuichi Torii
Keyword(s):  
Energy Source ◽  
Renewable Energy Source ◽  
Renewable Energy ◽  
Municipal Solid Waste ◽  
Combustion Chamber ◽  
Solid Waste ◽  
Gas Turbine ◽  
The Sun ◽  
Waste Oil ◽  
Micro Gas Turbine

Biomass is a renewable energy source in that the energy that it contains comes from the sun. One of sources of biomass is municipal solid waste. The final goal of the study is to develop the combustor for the micro gas-turbine using the biomass as a fuel. Here, it is very important to remove ashes (10μm or more in diameter) in the gas because its size affects the strength or erosion of the turbine blade. The aim of the present study is to observe the combustion phenomena relevant to a mixture of waste liquid and waste oil. Emphasis is placed on the ash size which is produced from the combustion chamber developed here. It is found that the ash size obtained at the exit of the combustor is less than 10 μm.

scholarly journals Boron Toxicity and Deficiency in Agricultural Plants

2020 ◽  
Vol 21 (4) ◽  
pp. 1424 ◽  
Author(s):  
Milka Brdar-Jokanović
Keyword(s):  
Cell Wall ◽  
Membrane Structure ◽  
Detrimental Effect ◽  
Narrow Range ◽  
Utilization Efficiency ◽  
Boron Toxicity ◽  
Plant Metabolism ◽  
Hormone Transport ◽  
Agricultural Plants

Boron is an essential plant micronutrient taken up via the roots mostly in the form of boric acid. Its important role in plant metabolism involves the stabilization of molecules with cis-diol groups. The element is involved in the cell wall and membrane structure and functioning; therefore, it participates in numerous ion, metabolite, and hormone transport reactions. Boron has an extremely narrow range between deficiency and toxicity, and inadequate boron supply exhibits a detrimental effect on the yield of agricultural plants. The deficiency problem can be solved by fertilization, whereas soil boron toxicity can be ameliorated using various procedures; however, these approaches are costly and time-consuming, and they often show temporary effects. Plant species, as well as the genotypes within the species, dramatically differ in terms of boron requirements; thus, the available soil boron which is deficient for one crop may exhibit toxic effects on another. The widely documented intraspecies genetic variability regarding boron utilization efficiency and toxicity tolerance, together with the knowledge of the physiology and genetics of boron, should result in the development of efficient and tolerant varieties that may represent a long-term sustainable solution for the problem of inadequate or excess boron supply.

scholarly journals The Anti-Promyelocytic Leukemia Mode of Action of Two Endophytic Secondary Metabolites Unveiled by a Proteomic Approach

Planta Medica ◽  
2014 ◽  
Vol 80 (06) ◽  
pp. 473-481 ◽  
Author(s):  
Margareth Gallo ◽  
Miranda Falso ◽  
Fernanda Balem ◽  
Diego Menezes ◽  
Núbia Rocha ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Mode Of Action ◽  
Promyelocytic Leukemia ◽  
Proteomic Approach

scholarly journals DESIGN OF EARLY FLOOD DETECTION (EFDe) SYSTEM BASED ON IoT FOR FLOOD VOCATIONAL AREAS

2020 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Wan Alamsyah ◽  
Eka Mutia ◽  
Yulina Ismida ◽  
Asmadi Suria ◽  
Rachmad Almi Putra
Keyword(s):  
Energy Source ◽  
Cellular Network ◽  
Sensor Response ◽  
The Internet ◽  
The Sun ◽  
Delivery Time ◽  
Detection Tool ◽  
Solar Control ◽  
Flood Detection ◽  
The Internet Of Things

<p>There is an early flood detection tool that has been successfully designed called the Early Flood Detection (EFDe) a system that uses the Internet of Things system which can be accessed by the users through a browser or an Android smartphone. In general, this tool has an accurate sensor response to the water level reading by the sensor. The time needed for the sensor to send data to the server is 10-15 seconds. The speed of this delivery time is influenced by several factors, including sensor response, server response, and the cellular network used. The EFDe system is equipped with an alarm around the location and has 10-15 second response when the indicator shows FLOOD POTENTIAL and will not stop until the signal changed to SAFE. This EFDe System is equipped with a solar panel and solar control charger and has an independent energy source that comes from the sun and stored in batteries. That is why the EFDe system is able to send information in real-time.</p>

Sign in / Sign up

Export Citation Format

Share Document