Radiation comes in different forms including electromagnetic waves and particulate matter. Ionizing radiation comes from unstable atoms and includes alpha particles, beta particles, gamma rays, x-rays, and neutrons. Exposure to ionizing radiation can cause DNA damage in plants and induce mutations, leading to effects like reduced growth, reproduction, and seed germination. While some low doses of radiation have been used to improve crops, high doses can kill plants or negatively impact their productivity and genetic structure. Infrared radiation also influences plant growth and development processes like blooming and stem elongation but too much can damage plants through heat.
Heavy metal stress
EFFECTS OF HEAVY METAL ON PLANTS
Sources of metal toxicity
Chromium, manganese, zinc, aluminum, copper, nickel
ALLUMINIUM TOXICITY IN SOIL
Inhibition of Ca Uptake by AIuminium
Aluminium tolerance in soil by internal accumulation
Aluminium tolerance in soil by exclusion
CADMIUM TOXICITY IN SOIL
CADMIUM ACCUMULATION IN PLANTS
CADMIUM TOXICITY IN PLANTS
CADMIUM TOLERANCE MECHANISM
ROLE OF PHYTOCHELATINS
Heavy metal stress
EFFECTS OF HEAVY METAL ON PLANTS
Sources of metal toxicity
Chromium, manganese, zinc, aluminum, copper, nickel
ALLUMINIUM TOXICITY IN SOIL
Inhibition of Ca Uptake by AIuminium
Aluminium tolerance in soil by internal accumulation
Aluminium tolerance in soil by exclusion
CADMIUM TOXICITY IN SOIL
CADMIUM ACCUMULATION IN PLANTS
CADMIUM TOXICITY IN PLANTS
CADMIUM TOLERANCE MECHANISM
ROLE OF PHYTOCHELATINS
Salinity stress
Categorization of salt affected soils
CAUSES OF SALINITY IN SOIL
Salinity effects on Plants
Injuries due to salt stress
different strategies to avoid salt injury
salt tolerance
salt avoidance
salt evasion
halophytes
non halophytes
glycophytes
Breeding for salt tolerance
intro-classification-salt accumulation in soil imapairs plant function and soil structure-physiological effects on crop growth and development-osmotic effect and specific ion effects-plant use different strategies to avoid salt injury
photoperiodism its discovery,significance,classifications,mechanism,critical day length,quality of light, night break phenomenon,phytochrome.florigen,floering genes, circadian rhythm
Due to varying climate change abiotic stresses play a major role in imparting crop loss. The understanding the mechanisms of complex abiotic stresses is a main constrain in the crop breeding. Wind is such a complex stress causing variable number of stresses including both mechanical and air flow. It can also cause direct and indirect effects causing severe crop losses.
Different aspects of light and their influence on plant growthscience book
Presentation on the Different aspects of light and their influence on plant growth. How the light effects the plant growth. how pant's growth increase and decrease by light different frequencies and intensities
Biological stress is not easily defined but it implies adverse effects on an organism. Like all other living organisms, the plants are subjected to various environmental stresses such as water deficit and drought, cold, heat, salinity and air pollution etc.
The concept of stress is associated with stress tolerance. Degree of tolerance differs with different plant species.
A heavy metal is toxic when relatively it is dense metal or metalloid that is noted for its potential toxicity, especially in environmental contexts.
Heavy metal toxicity means excess of required concentration or it is unwanted which were found naturally on the earth, and become concentrated as a result of human caused activities.
Then enter in plant, animal and human tissues via inhalation, diet and manual handling, and can bind to, and interfere with the functioning of vital cellular components.
Salinity stress
Categorization of salt affected soils
CAUSES OF SALINITY IN SOIL
Salinity effects on Plants
Injuries due to salt stress
different strategies to avoid salt injury
salt tolerance
salt avoidance
salt evasion
halophytes
non halophytes
glycophytes
Breeding for salt tolerance
intro-classification-salt accumulation in soil imapairs plant function and soil structure-physiological effects on crop growth and development-osmotic effect and specific ion effects-plant use different strategies to avoid salt injury
photoperiodism its discovery,significance,classifications,mechanism,critical day length,quality of light, night break phenomenon,phytochrome.florigen,floering genes, circadian rhythm
Due to varying climate change abiotic stresses play a major role in imparting crop loss. The understanding the mechanisms of complex abiotic stresses is a main constrain in the crop breeding. Wind is such a complex stress causing variable number of stresses including both mechanical and air flow. It can also cause direct and indirect effects causing severe crop losses.
Different aspects of light and their influence on plant growthscience book
Presentation on the Different aspects of light and their influence on plant growth. How the light effects the plant growth. how pant's growth increase and decrease by light different frequencies and intensities
Biological stress is not easily defined but it implies adverse effects on an organism. Like all other living organisms, the plants are subjected to various environmental stresses such as water deficit and drought, cold, heat, salinity and air pollution etc.
The concept of stress is associated with stress tolerance. Degree of tolerance differs with different plant species.
A heavy metal is toxic when relatively it is dense metal or metalloid that is noted for its potential toxicity, especially in environmental contexts.
Heavy metal toxicity means excess of required concentration or it is unwanted which were found naturally on the earth, and become concentrated as a result of human caused activities.
Then enter in plant, animal and human tissues via inhalation, diet and manual handling, and can bind to, and interfere with the functioning of vital cellular components.
RADIATION BIOLOGY- ORAL MEDICINE AND RADIOLOGYeducarenaac
A major theme for the radiobiology section is the use of radiation as a model agent to study cellular responses including genomic instability, cell cycle controls, DNA damage processing, oxidative stress, senescence, and apoptosis, as well as the signaling mechanisms mediating these and other stress responses.
Radiations Have adverse effect on our environment. We should avoid those radioactive substances. Every one of us should know about radioactive pollution. So please study this presentation for our better environment and healthy life.
plant show different symptoms on the deficiency of different essential nutrients. which symptom show which nutrient deficiency in detail elaborated in the presentation
different stress effects on the plant and plant's adaption to the stress to manage it,all these discussed in detail in this presentation, what happens to the plants when stress happen is in presentation in details
give you the information about the components of irrigation system.why Dam, barrage, head works, canal, major canal ,minor canal, water courses and field channels are made and how these works, all these are discussed in this
this presentation give you detail information about the Production technology of Tobacco. how we control weeds,insects,pests in the crop. how we increase the yield of crop.
What is Photosynthetic active Radiation and Crop Growth Rate science book
What is Photosynthetic active Radiation and Crop Growth Rate. how Photosynthetic active Radiation effects the crop growth rate.how radiations increase and decrease the crop growth
Production technology of sesamum indicum or sesamumscience book
this presentation give you detail information about the Production technology of sesamum indicum or sesamum. how we control weeds,insects,pests in the crop. how we increase the yield of crop.
this presentation give you detail information about the Production technology of fenugreek. how we control weeds,insects,pests in the crop. how we increase the yield of crop.
Stress management, Different practices to manage stressscience book
this presentation will help you to manage stress. How we get rid of stress. Different practices to manage stress.this presentation will details information about stress management.
This is brief discussion on the Respiration and Types of respiration.
total process of glycolysis, citric acid cycle. This will help you to understand the respiration complete process of respiration
Role of mulching and solarization in weed managementscience book
This is presentation on topic Role of mulching and solarization in weed management. This will support you to control weed with different and new processes which are very effective in weeds control
what is Greenhouse, its effects, its Causes and management. All these topics are covered in this presentation and give you detail information about it.
Nozzles and different sprayers used to spray pesticidescience book
this is presentation on the different types of Nozzles and different sprayers used to spray pesticide. This will enhance your knowledge about the sprayers and nozzles used to spray pesticide
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Plant nutrients, Nutrients required for plant Bodyscience book
this presentation will give you complete information about Plant nutrients, Nutrients required for plant Body,effects of different plant nutrients.how manage plant nutrients. Symptoms of plants nutrients deficiency.
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Food security,Management of Food security science book
Food security.Factors enhance and decrease the food security. Food security Management processes. helpful to understand the basic concept and factors effecting the food security.
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
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Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
5. Ionizing radiation is produced by unstable atoms.
Unstable atoms differ from stable atoms because
they have an excess of energy or mass or both.
Unstable atoms are said to be radioactive. In order
to reach stability, these atoms give off, or emit,
the excess energy or mass. These emissions are
called radiation.
6.
7. Higher energy electromagnetic waves (gamma) or
heavy particles (beta and alpha). High enough
energy to pull electron from orbit
Types :
Alpha particles
Beta particles
Gamma rays (or photons)
X-Rays (or photons)
Neutrons
8. Alpha Particles: 2 neutrons and 2 protons. They travel
short distances, have large mass ,Only a hazard when
inhaled
Beta Particles: Electrons or positrons having small mass
and variable energy. Electrons form when a neutron
transforms into a proton and an electron.
9. Gamma Rays (or photons): Result when the
nucleus releases energy, usually after an alpha,
beta or positron transition
X-Rays: Occur whenever an inner shell orbital
electron is removed and rearrangement of the
atomic electrons results with the release of the
elements characteristic X-Ray energy
Neutrons: Have the same mass as protons but
are uncharged
10.
11. Chromosomal aberrations
Visually observable changes in chromosomes
structure.
DNA damage
Any damage to DNA molecules ,including DNA
sequence “ inversion ” TCAG now GACT as well as
sections of sequences deleted .
12. Growth reduction
Reduction in the rate of growth of plants
Reproduction effects
Including sterility , reduction in reproduction
rate and occurrence of abnormalities or
reduction in viability of plants.
Reduced seed germination
Mortality , including both acute lethality and
long term reduction in life span
Direct burn damage to exposed tissues
13. Direct contact with radiations is not required
to effect local plant life , the mere presence
of reactor is often enough.
To build a nuclear reactor, one requires a
great deal of space , usually near water,
which means clearing out any local
vegetation.
Heat given off by the reactor can change
nearby water temperature, disturbing the
delicate conditions required for coastal
vegetation.
14. Because ultraviolet radiation destroys cells,
the chance of mutation are great.
Affected plants are often small and weak with
altered leaf patrens.
15. Prolonged radiation can completely destroy
the fertility of plant. The plant gradually dies.
The surroundings become poisoned and
prevent the growth of future offspring.
Not all radiation is bad . Sunshine is a type of
radiation that is needed for photosynthesis
and normal plant growth.
16. Ultraviolet radiations affects plant growth and
development in many ways. First, it gradually
stops seed growth and sprouting, depended
on the how much radiation is released. Soil
can become compacted and lose the nutrients
needed for plants to grow.
The results of various lab experiments
supplying ultraviolet radiation through
filtered lamps proved that higher doses of
radiation administered to plants were very
damaging
17. The stomata is small air hole within the leave
of plant that control the water levels.
If there is to much evaporation due to the
intense radiation, the stomata closes to
reserve water. If the stomata is unable to
open for a long period of time, the growth of
plant is stunted.
Prolonged periods of radiation can completely
damage the stomata and destroy the plant.
18. The cells of living organism are also damaged
and killed by ultraviolet radiation.
What allow plants to grow is the division and
expansion of cells as they take up water.
Cell contains chromosomes, the genetic
material responsible for plant reproduction. If
the cell is overly damaged by radiation, then
reproduction is hindered
19.
20. Consist of unstable atoms or radio nuclides which
decay spontaneously and change into different
types of atoms
Contains different form of energy particles such as
Alpha , Beta ( electrons), gamma, protons and
neutrons.
Alpha radiation is non penetrating but dangerous if
emitted inside the body
Beta radiation can penetrate and cause non healing
effects
Gamma radiation is highly penetrating have high
energy particles like x rays
21. Hazardous effects of nuclear radiation are
generally caused by these gamma rays and
plants are extremely sensitive to gamma
radiation
Higher plants show wide range (5-500
rads/day) of radio sensitivity
22. Nuclear radiation induces versatile changes in plant
system at morphological, cellular, metabolic and
genetic levels
Plants response to irradiation varies according to
age, growth stage, plant species, chromosomes
volume and high or low dose of radiation
Effects of radiations on plants near Chernobyl
accident site, structural distortion or swelling in
endoplasmic reticulum, Thylakoid membranes,
mitochondria, cell wall , and plasma membrane of
plant cells has been observed in vitro conditions
(national geographic magazine august 1994)
23. Alterations in plant vascular system, water
transport and other cellular functions have also
been found. These changes are usually irreversible
and retained after radiation has stopped.
Foliage can get readily contaminated with
radioactive substances and if ingested by
herbivores; they are automatically exposed to
radiation and suffer from its possible effects .
thus in particular food chain, radiation of dose of
contaminated producers can reach up to tertiary
consumers via primary and secondary consumers.
24. Germination of seeds that have been exposed
to radiation may show retarded growth,
increased mortality and decreased percent
germination.
Radiation exposed seeds or seedlings have
differed morphological characteristics
25. Alpha beta gamma rays of nuclear radiation
are energetic enough to detach electrons
from atoms or molecules thus ionizing them.
Generation of free radicals which can damage
or mutate DNA even at room temperature is
the major property and primary cause of
danger by these ionizing radiations
Radiation induced genetic mutations can
change plant vigor which in turn negatively
affects plant productivity.
26. Nuclear radiation induced mutations and DNA
damage usually results in irreversible
phenotypic and genotypic changes in particular
plant species. And is directly proportional to
intensity and of exposure
If plant in its embryonic state is exposed to
radiation, mutational changes like infertility
increased disease susceptibility, reduced
germination frequency, flowering, pod maturity
and decreased grain / straw yield can be very
harmful.
27. However, we should not forget that some
nuclear radiations as gamma particles at
defined doses have been utilized in crop
improvement protocols with interesting
useful results such as increased disease
resistance, vigor, and high productivity.
It also effects the growth hormones .
28. Gigantism, dwarfism, abnormal rapid growth
underdeveloped root system or curly and
misshaped leaves are some of the changes
showed by the growing plants after exposure
to low doses of radiations.
Higher dose can kill the plants of similar or
different species
Radiation inhibit the germination and
responsible for DNA damage in embryonic
state.
29. Nuclear radiation emits from uranium,
radium, and radon found in the earth crust
30. Blooming
• Infrared light plays a part in the blooming of
flowering plants.
• Plants grown indoors may grow well under
fluorescent lights, but will not bloom until
appropriate levels of infrared radiation have
been introduced. This can be done using
special horticultural lights, or simply by
adding incandescent light bulbs.
31. Stem
• Increased infrared rays can effect the speed at
which plant stem grow.
• A short exposure to far infrared light increased the
space between nodes when the exposure occurred
at the end of an eight hour light period. Exposing
the plants to ordinary red light reversed this effect.
• A combination of far red and red light produced
the longest internodes.
• Plants grown in light that is too red may seem
spindly and long stemmed
32. Damage
• Too much infrared light, especially in the far
red end of the spectrum, may actually
damage plants
• Heat may discolor or kill plants, especially if
those plants have not recently been watered.
• Too much infra red light may also cause
plants to experience early growth spurts that
reduce their health, or encourage them to
early flowering .