what is phototropism gravitropism hydrotropism and chemotropism
Answers
Answer:
A tropism is a growth toward or away from a stimulus. ... Growth in the direction of a stimulus is known as positive tropism, while growth away from a stimulus is known as a negative tropism. Common tropic responses in plants include phototropism, gravitropism, thigmotropism, hydrotropism, thermotropism, and chemotropism.
Answer :
Phototropism
PhototropismPlants grow towards or away from the light, the type of tropism in the response to light is called phototropism. In general, the stems usually show positive phototropism, while roots show negative phototropism. Leaves also positively respond toward the source of light.
Phototropism
PhototropismGravitropism
PhototropismGravitropismIt is a type of tropism where plants show some growth in response to gravity. Stems are negative to the gravitropism while roots are positive to the gravitropism. This is also referred to as geotropism. Among different parts of plants, the primary roots and certain other portions of the root system show positive geotropism by growing directly towards the centre of gravity. The stems are called as the negatively geotropic as they grow away from the centre of gravity. The leaves are transversely geotropic as they select their positions at right angles to the centre of gravity.
PhototropismGravitropismIt is a type of tropism where plants show some growth in response to gravity. Stems are negative to the gravitropism while roots are positive to the gravitropism. This is also referred to as geotropism. Among different parts of plants, the primary roots and certain other portions of the root system show positive geotropism by growing directly towards the centre of gravity. The stems are called as the negatively geotropic as they grow away from the centre of gravity. The leaves are transversely geotropic as they select their positions at right angles to the centre of gravity.Gravitropism
PhototropismGravitropismIt is a type of tropism where plants show some growth in response to gravity. Stems are negative to the gravitropism while roots are positive to the gravitropism. This is also referred to as geotropism. Among different parts of plants, the primary roots and certain other portions of the root system show positive geotropism by growing directly towards the centre of gravity. The stems are called as the negatively geotropic as they grow away from the centre of gravity. The leaves are transversely geotropic as they select their positions at right angles to the centre of gravity.GravitropismChemotropism
PhototropismGravitropismIt is a type of tropism where plants show some growth in response to gravity. Stems are negative to the gravitropism while roots are positive to the gravitropism. This is also referred to as geotropism. Among different parts of plants, the primary roots and certain other portions of the root system show positive geotropism by growing directly towards the centre of gravity. The stems are called as the negatively geotropic as they grow away from the centre of gravity. The leaves are transversely geotropic as they select their positions at right angles to the centre of gravity.GravitropismChemotropismThere are few chemical substances, which are actively responsible for bringing a curvature movement in plant organs. When plants grow in response to certain chemicals, this type of response is known as chemotropism. Few examples of chemotropic movements are the conversion of a flower into fruit, the growth of a pollen tube down the style during fertilization, movement of tentacles in Drosera, etc.