Plant Movement

  ❤ The movement of the plant in reaction to an external stimulus whose direction is not dictated by the stimulus's direction. ❤ Type of nastic movement: 🌴 Photonasty: Disruptions in the intensity of light cause this type of movement. In reaction to the intensity of light, the flower petals of the type of plants that have this type of movement will open during the day and close at night. Example: Dandelion flower (This animation is for illustration purpose only) 🌴 Nyctinasty: Movements of plants in the dark or at night This type of plant can also be classified as photonastic movement Leguminous plants exhibit the nyctinasty movement. 🌴Chemonasty: The plant reaction towards chemicals or nutrients by which the roots grow towards the most nutrient-dense areas of the soil. 🌴Hydronasty: The plant reaction towards the water by which the roots grow towards the source of water  🌴Thermonasty: Temperature variations cause this type of motion by the plant. For example, the opening ...

1. Phototropism ❤Plants tend to grow either toward or away from light. Positive tropism: the shoot that grows towards the light Negative tropism: the root that grows away from the light ❤Cells on the different sides of the shoot grow at different rates. Cells on the opposing side lengthen more rapidly causing the bend of the shoot towards the light. The cells on the shade side develop rapidly than those on the lit side. 2. Gravitropism ❤To maintain an effective photosynthesis and gas exchange of the leaf, shoots develop upward and roots develop downward. Positive: roots that develop downward Negative: shoots that develop upward ❤Gravitropism is important for the roots to anchor the plant and absorb water and mineral ions from the soil and for the shoots to move towards the sunlight to ensure enough sunlight is supplied to the plant. ❤Statoliths are starch-granule-containing plastids that move downwards in reaction to gravity. ❤Statoliths are located in the root cap's specialized ce...

  Why does the plant move? 1.  Plant responses to environmental stimuli 2. Plant must respond to a wide range of environmental conditions via developmental and physiological systems 3. Plant growth and physiology are influenced by various environmental factors. How do plants move? 1. Tropism ❤Definition: Growth in response to a stimulus for example light, gravity, and touch. ❤Auxin (also known as IAA) is a plant hormone that plays a significant role in a lot of tropisms. ❤Auxin is a plant hormone generated in the stem tip which stimulates cell elongation and root development by facilitating cell division. 2. Nastic movement ❤Definition: The movement of the plant in reaction to an external stimulus whose direction is not dictated by the stimulus's direction. Example of tropism and nastic movement: