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- In a stem, the shaded side contains more auxin and grows longer, which causes the stem to grow towards the light. The plant does NOT bend towards the light. It grows because the auxin causes the cells to elongate on the shaded side, so this side grows more. This unequal growth of the two sides, results in the growth of the stem towards the light.
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In the plant stem, responses to light are known as a positive phototropism, which means the stem grows towards the light. In the plant root, responses to light are known as a negative...
- Plant Hormones
In the plant root, responses to light are known as a...
- Plant Hormones
In the plant root, responses to light are known as a negative phototropism, which means the root grows away from the light. Positive phototropism in plant stems. Auxins. are a family of plant...
Jan 16, 2013 · An introduction to plant responses to light. Table of Contents: 00:24 - Objectives 00:38 - Phytochromes 02:05 - Phytochromes 02:55 - Seed Germination 04:06 - Shade Avoidance 04:55 - Circadian...
- 9 min
- 8.1K
- Vance Kite
Photomorphogenesis is the growth and development of plants in response to light. It allows plants to optimize their use of light and space. Photoperiodism is the ability to use light to track time. Plants can tell the time of day and time of year by sensing and using various wavelengths of sunlight.
Jul 31, 2022 · Phototropism—the directional bending of a plant toward or away from a light source—is a response to blue wavelengths of light. Positive phototropism is growth towards a light source (Figure 2), while negative phototropism (also called skototropism) is growth away from light.
Jan 30, 2014 · Phototropism, or the differential cell elongation exhibited by a plant organ in response to directional blue light, provides the plant with a means to optimize photosynthetic light capture in the aerial portion and water and nutrient acquisition in the roots.
May 1, 2006 · Drawing on Theophrastus' description of phototropism and anthropomorphic treatment of the response by medieval sources, della Porta described plant phototropism as a “rejoicing” response to the sun (della Porta, 1569).
