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Questions and Answers
What is the main objective of plant pathology?
To study plant diseases and improve the chances of plant survival in unfavorable environmental conditions and parasitic microorganisms.
What are the two types of causes of diseases or disorders that plant pathology studies?
Biotic (living) and abiotic (non-living and environmental) causes.
What determines the type of symptoms that appear in plant diseases?
The type of cells and tissues that become affected determines the type of physiological function that will be disrupted first.
What is the term used to describe the study of plant diseases?
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What is one of the major objectives of plant pathology in relation to the environment?
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What is the result of infection of roots in plants?
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What is the effect of infection of xylem vessels on plant growth?
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What is the role of pathogens in causing disease in plants?
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What are some environmental factors that can cause disease in plants?
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What is the result of infection of flowers and fruits in plants?
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Study Notes
What is Plant Pathology?
- Plant pathology is the science that studies plant diseases and environmental conditions that affect plant survival.
- It is a branch of agricultural, botanical, or biological science that deals with the study of plant diseases.
- Phytopathology is the Greek term for plant pathology, meaning "plant disease knowledge".
Objectives of Plant Pathology
- Study biotic (living) and abiotic (non-living and environmental) causes of diseases or disorders.
- Study the mechanisms of disease development by pathogens.
- Study the plant (host)-pathogen interaction in relation to the environment.
- Develop methods of management and control of plant diseases.
Symptoms of Plant Diseases
- Symptoms of plant diseases depend on the type of cells and tissues affected.
- Infection of roots can cause rotting, preventing water and nutrient absorption.
- Infection of xylem vessels can interfere with water and mineral translocation, leading to wilt symptoms.
- Infection of foliage can interfere with photosynthesis, causing leaf spots, blights, and more.
- Infection of flowers and fruits can interfere with reproduction.
Causes of Plant Diseases
- Pathogenic microorganisms, such as viruses, bacteria, fungi, protozoa, and nematodes, can cause disease in plants.
- Unfavorable environmental conditions, such as lack or excess of nutrients, moisture, and light, can also cause disease.
- Presence of toxic chemicals in air or soil can cause disease.
- Plants can suffer from competition with other, unwanted plants (weeds), and damage from insects, humans, or other animals.
- Pathogenic microorganisms can cause disease by disturbing plant cell metabolism, secreting enzymes, toxins, and growth regulators, and absorbing foodstuffs from host cells.
- Environmental factors can cause disease when abiotic factors, such as temperature, moisture, mineral nutrients, and pollutants, occur at levels above or below a certain range tolerated by the plants.
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Description
Explore the world of plant pathology, studying plant diseases and ways to improve plant survival in unfavorable conditions. Learn about the branch of agricultural, botanical, or biological science that deals with plant diseases. Discover the science behind plant disease management.
