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A substance that is produced in one part of an organism and affects another part of the same individual. They are chemical substances that control a plant's patterns of growth and development, and its responses to environmental conditions.
Target cell or target tissue
Two types of areas which are a portion of an organism which is affected by and contains hormone receptors for a particular hormone.
Substances which are produced in the apical meristem and are transported down to the rest of the plant. They regulate cell growth. In stems, they stimulate cell elongation. In roots, they inhibit cell growth and elongation, causing them to grow downward.
A meristematic area on the side of a stem that gives rise to side branches. Their growth can be inhibited by auxins.
The phenomenon in which because auxins move out from the apical meristem, the closer a lateral bud is to the meristem, the more its growth is inhibited.
Plant hormones that stimulate cell division and the growth of lateral buds or cause dormant seeds to sprout. They often produce opposite effects to those of auxins, by inhibiting cell elongation and causing cells to grow thicker. They are produced in growing roots and in developing roots and seeds.
A plant hormone which causes fruit to ripen. It is also a minor component of natural gas.In response to auxins, fruit tissues release small amounts of it.
The response of plants to touch. One effect is that plants curl and twist around objects.
When plants respond to periods of light and darkness. It is responsible for for the timing of seasonal activities such as flowering and growth.
The plant pigment which is responsible for Photoperiodism. It absorbs red light and activates a number of signaling pathways within plant cells.
The period during which an organism's growth and activity decrease or stop. When it starts getting cold, deciduous plants turn off photosynthetic pathways, transport materials from leaves to roots, and seal leaves off from the rest of the plant.
A layer of cells at the petiole which seals the leaf off from the plant's vascular system.
This type of plant has adapted to its environment by having large air-filled spaces through which oxygen can diffuse in order to take in sufficient oxygen.
The leaves of these plants have specialized cells that pump salt out of the plant tissues and onto the leaf surfaces, where it is washed off by rain.
Plants that live in the desert biome. Plant adaptions to this climate include extensive roots, reduced leaves, and thick stems that can store water.
Carnivorous Plants and Parasites
2 types if plants that have specialized features for obtaining nutrients.
Plants that are not rooted in the soil but grow directly on the bodies of other plants but are not parasites. They gather their own moisture and produce their own food. (Ex: Moss or Orchids)
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