Admin Table of Contents
What are three ways plants defend themselves?
Mechanical Defenses The first line of defense in plants is an intact and impenetrable barrier composed of bark and a waxy cuticle. Both protect plants against herbivores. Other adaptations against herbivores include hard shells, thorns (modified branches), and spines (modified leaves).
What is plant Defence?
Plant defense against herbivory or host-plant resistance (HPR) describes a range of adaptations evolved by plants which improve their survival and reproduction by reducing the impact of herbivores. These chemical defenses can act as repellents or toxins to herbivores, or reduce plant digestibility.
What is the relationship between insect resistance and plant host resistance?
Resistance of plants is relative and is based on comparison with plants lacking the resistance characters, i.e., susceptible plants. Effect of Insect Pest-Plant Host Relationship: Insect-resistant crop varieties suppress insect pest abundance or elevate the damage tolerance level of the plants.
What is the difference between plant resistance and biological control?
For example, plant resistance to insects is compatible with insecticide use, while biological control is not. Plant resistance to insects is not density dependent, whereas biological control is. Plant resistance is specific, only affecting the target pest. Often effects of use of insect-resistant cultivars are cumulative over time.
How do plants respond to stimuli?
Artem has a doctor of veterinary medicine degree. Plants respond to a wide variety of stimuli. This includes gravity. This lesson explains how gravity influences a plant, especially in its earliest stages of development. What stimulates you? Coffee? Exercise? An exciting movie? The adrenaline rush from skydiving?
Why study plant defense and disease resistance?
A close examination of plant anatomy is presented, as well as some of the ecological relationships that contribute to plant defense and disease resistance. Special care has been taken to illustrate how products used in everyday life are derived from substances produced by plants during defense responses.