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Plant Defenses against Predators

Plant Defenses against Predators. By: Jordan DiNardo and Kimmi Tamashiro. Types of Defenses. Chemical Defenses Mechanical Defenses Mimicry and Camouflage Indirect Defenses Leaf shedding and color. Chemical Defenses.

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Plant Defenses against Predators

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  1. Plant Defenses against Predators By: Jordan DiNardo and KimmiTamashiro

  2. Types of Defenses • Chemical Defenses • Mechanical Defenses • Mimicry and Camouflage • Indirect Defenses • Leaf shedding and color

  3. Chemical Defenses • Plant release chemicals that play a major role in defenses against herbivores. • Qualitative metabolites • Quantitative metabolites

  4. Mechanical Defenses • External structural defenses that protect plants from herbivores • Wax covering the epidermis of the plant • Production of sap • Sharp spines or trichome covering the plant • Thigmonasty

  5. Mimicry and Camouflage • Some plants mimic the presence of insect eggs on their leaves, dissuading species from laying their eggs there.

  6. Indirect Defenses • When attacked by chemicals, plants give off a chemical that contains an abnormal ratio of volatiles. • Plants also provide housing and food items for natural enemies of herbivores, which protect them. This process is called a “biotic” defense mechanism.

  7. Leaf Shedding and Color • Leaf shedding is a form of response that provides protection against diseases and certain pests to the plant.

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