BIOA02H3 Lecture Notes - Lecture 12: Monarch Butterfly, Lemming, Meristem
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BIOA02H3 Full Course Notes
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All non-plants depends directly or indirectly on plant food = every plant is under attack by herbivore -> herbivory: most widespread plant-animal interaction e. g. insects. Chemical defence e. g. plant secondary compound (toxin) -> primary compound vs secondary compound - pdt of photosynthesis & protein synthesis essential to normal cell func e. g. carbohydrates, proteins, starches, cellulose vs pdt w/ x direct func in basic metabolism. Plant defence: typical plant pdc up to several hundreds of defense compounds and its production is under strict genetic control; systemic - always present vs induced - when attacked by herbivore. Systemic physical - e. g. thorn & spine @ succulence -> backward pointing hooks -> hard to get out once inside skin // may cause infection. Trichome (density): need to remove it b4 caterpillar can eat plant. Make-believe: e. g. passion flower -> a spec type of butterfly feed on it -> plant become toxic -> larvae become resistant to toxin -> leave create yellow spots -
