Table of Contents
Control and Coordination are important processes for a living organism that is brought about by the nervous system. They are essential for the proper functioning of an organism and the regulation of different functions of different systems.
Plants don’t have nerves and muscles but they need control and coordination for survival plants also show movement by the growth of their various parts. It is plants hormones that promote its growth.
Despite not having sense organs plants can also sense things and respond to them. plants respond to things like light, gravity, touch, water, etc. These are environmental stimuli for a plant. Plants coordinate their behavior by using their hormones and respond to environmental change. this they do by affecting the growth of a plant.
🌀𝗪𝗵𝘆 𝗽𝗹𝗮𝗻𝘁𝘀🌱 𝗮𝗿𝗲 𝗶𝗺𝗽𝗼𝗿𝘁𝗮𝗻𝘁 𝗶𝗻 𝗼𝘂𝗿 𝗹𝗶𝗳𝗲
Plants are really important for all living things. Plants form the core of what comes to mind when we soil in place to reduce erosion and improve water quality. Plants provide our food, materials for shelter, fuel to warm us and replenish the air we breathe. Plants also provide food for animals and a habitat for wildlife.
Plants have many different farms such as huge trees🌲, others are herbs or some have bushy forms. The basic food for all organisms is produced by green plants. Plants help in maintaining oxygen label, the most important gas that enables us to breathe. Animals emit carbon dioxide by taking in oxygen.
🟦𝗛𝘆𝗱𝗿𝗼𝘁𝗿𝗼𝗽𝗶𝘀𝗺 when a plant part moves in response to Water, it is called hydrotropism. Here the stimulus is water. The roots of a plant move towards the water, so these show positive hydrotropism.
🟦𝗧𝗵𝗶𝗴𝗺𝗼𝘁𝗿𝗼𝗽𝗶𝘀𝗺 when a plant part shows directional movement in response to the touch of an object, it is called Thingmotropism.
🟦𝗧𝘆𝗽𝗲𝘀 𝗼𝗳 𝘁𝗿𝗼𝗽𝗶𝘀𝗺
There are full stimuli in the environment. They are light, gravity, chemical water, and touch. These stimuli give five types of tropism. They are Phototropism, geotropism, chemotropism, hydrotropism, and thigmotropism
Where a plant part moves in response to light, it is called phototropism. If the stem of a growing plant moves or bends towards the light, it is positive phototropism and if the root of a plant moves away from light, this means the roots of a plant show negative phototropism.
When a plant part moving response to gravity, it is called geotropism. For example, roots of plant moves to a downward direction, so they show positive geotropism and stem moves in the upward direction, so it shows negative geotropism.
When a plant moves in response to chemical stimulus, it is called chemotropism here the stimulus is chemical, for example, the growth of
This harmony promotes cell division in plants🌱 & breaks Dormancy in seeds and buds. They also delay ageing in leaves and promote the opening of stomata.
Hormones work in the presence of ausein hormone and promote cell enlargement and cell differentiation.
When the direction of external stimulus decides the direction of response in the form of growth it is called tropism. Thus, tropism is the directional growth movement of a plant🌱 part. It can be in the direction of the stimulus or away from the stimulus.
Therefore, if the growth of a plant is in the direction of stimulus it is called positive tropism.
It is the growth of a plant that is in the opposite direction or away from that of a stimulus., it is called a negative stimulus.
The four types of plant hormones responsible for control and coordination in plants are