Chapter 25: Plant Responses and Adaptations
Chapter 25: Plant Responses and Adaptations
Terms
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- xerophyte
- plant that lives in the desert biome
- target cell
- cell that has a receptor for a particular hormone
- ethylene
- plant hormone that stimulates fruits to ripen
- auxin
- substance produced in the tip of a seedling that stimulates cell elongation
- tropism
- response of a plant to an external stimulus
- cytokinin
- plant hormone produced in growing roots and in developing fruits and seeds
- gravitropism
- response of a plant to the force of gravity
- short-day plant
- plant that flowers when daylight is short
- apical dominance
- phenomenon in which the closer a bud is to the stem's tip, the more its growth is inhibited
- thigmotropism
- response of plants to touch
- photoperiodism
- response of plants to periods of light and darkness
- gibberellin
- growth-promoting substance produced by plants
- dormancy
- period of time during which a plant embryo is alive but not growing
- abscission layer
- layer of cells at the petiole that seals off a leaf from the vascular system
- epiphyte
- plant that is not rooted in soil but instead grows directly on the body of another plant
- herbicide
- compound that is toxic to plants
- long-day plant
- plant that flowers when days are long
- phytochrome
- plant pigment responsible for photoperiodism
- hormone
- substance produced in one part of an organism that affects another part of the same organism
- phototropism
- tendency of plants to grow toward a source of light
- lateral bud
- meristematic area on the side of a stem that gives rise to side branches