Why Do Plants Need Water? Plant Growth Facts To Know!

Akinwalere Olaleye
Oct 12, 2023 By Akinwalere Olaleye
Originally Published on Nov 26, 2021
Have you ever wondered why do plants need water? Find out here.
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Age: 3-18
Read time: 5.6 Min

Water is utilized for the transportation of nutrients from the soil to the green plant tissues through transpiration.

On a green or fresh weight basis, water makes up over 90% of the plant's body. Sunlight and photosynthesis are the things plants use for their growth, however, the majority of the resources for plant growth come from water and air.

Photosynthesis, which is fueled by temperature, allows plants to take in carbon dioxide from the air and convert it to glucose. It is best to water the plants in the morning or evening.

More significantly, watering at these times aids the plant's water retention. Even though there appears to be less evaporation at night, watering your plant late at night might harm the gardening process you've worked so hard to maintain.

If you like this article, you may find it interesting to read these fun facts articles on why plants need nitrogen and why plants need sunlight here on Kidadl.

Do all plants need water to grow?

Plants comprise roughly 80-95% water, and plants need water for a variety of purposes as they grow, including photosynthesis, cooling, and transporting minerals and nutrients from the soil into the plant. Plants in water may live for a week without water before displaying symptoms.

Plants use water and sunlight to thrive. Most plants grow in soil, but it isn't necessary for them to thrive. Without dirt, you can grow a plant! Plants, like any other living things, require water to survive.

Plants, on the other hand, require far more water than many other living things due to their high water consumption. Plants likewise have a higher amount of water content than animals, with roughly 90% of their mass made up of water. Water enters the plant cells make them grow healthier.

One of the major signs that a plant seed is ready to germinate and thrive is the presence of water. Water makes around 80-90 % of seed cells! Water fills the plant cells and keeps the plants alive, giving them structure and life.

What role does water play in photosynthesis?

Plants need water for photosynthesis, and the light-dependent stages of photosynthesis are both powered by water, which supplies electrons and hydrogen ions. Photosynthesis, the process through which plants generate energy, requires a lot of water.

Plants 'sweat' by releasing water from their leaves and stems to cool off. Only when the nutrients are in a liquid solution with water can plants absorb them.

The metabolic process is called photosynthesis that involves the generation of sugar (glucose) and the release of oxygen from light, water, and carbon dioxide. It is a set of complicated metabolic events that may be found in higher plants, algae, bacteria, and photoautotrophs.

One of the most important components of photosynthesis is water.

One molecule of glucose is formed when six water molecules combine with six carbon molecules. As a result, oxygen molecules are released into the environment, where they are transformed into oxygen gas, which is necessary for air circulation in mammalian growth.

Water also delivers electrons to the carbon, which bond to the hydrogen atoms to the plants make glucose. By supplying H+ ions, water also works as a reducing agent, converting NADP+ to NADPH.

NADPH activates chlorophyll, which gives the plant its green hue. The rate of photosynthesis is influenced by carbon dioxide content, temperature, and light intensity. It obtains its energy from absorbed photons and reduces with water.

Xylem, plant vascular tissue that transports water and dissolved minerals from the roots to the rest of the plant while also providing life.

Why do plants need to control the loss of water?

Water is essential for plant development and production. Plants must always strike a balance between photosynthesis and transpiration, which can only be achieved by limiting water loss. The plant needs both processes to survive, but they also face dangers on a daily basis, especially in difficult settings.

Different plant species, such as cactus species, have developed over time to increase water retention. Aside from the fact that water is a limiting ingredient in photosynthesis, controlling water loss provides benefits, including cooling, improved nutrient absorption, and structural support when the plant undergoes transpiration.

Transpiration, by definition, is the loss of water from plants via water vapor. Plants require this process for evaporative cooling, soil nutrient acquisition, gas exchange and may absorb water. Plants, on the other hand, must keep water loss under control since it is essential for metabolic reactions.

What are different ways to keep plants hydrated?

When a plants get enough water, the water pressure inside the stems and leaves is sufficient to keep the leaves healthy and upright; when a plant is not properly hydrated, the little water movement inside the stems and leaves diminishes, causing the leaves to wilt.

Cover soil with an organic layer of straw, leaves, shredded paper or cardboard, or bark. This will help to keep the soil cool, limit runoff as water evaporates from the soil, and keep moisture in the soil for extended periods of time between waterings.

To use a water air plants system, take them out of the soil and dunk them in a bowl or sink filled with enough water to totally submerge them.

For most plants, less frequent, deeper waterings are more beneficial than frequent, shallow waterings. Plant roots cells will grow stronger and healthier, requiring less frequent watering.

Push your finger down into the earth to see if it's time to water. It doesn't need water if it's still wet, a knuckle or two deep.

If the soil is dry, soak it for a lengthy time to ensure that the water reaches the roots.

Rather than being absorbed into the bottom layers, large volumes of water tend to flow off the soil surface. As a result, it's ideal to water gently, enabling the water to seep into the soil and infiltrate all the way down to the plants' roots.

Drip lines, which may be seen in nurseries and home stores, provide extremely slow and effective irrigation. If your plants are susceptible to a variety of leaf diseases, drip irrigation may assist in avoiding them by keeping the leaves dry.

You may also use an automated timer to water your plants. Both a drip irrigation system and a sprinkler may be connected to timers that can be programmed for automatic, daily or regular watering cycles.

Organic materials like coconut husks, peat moss, and even compost absorb water, allowing plants to retain moisture during dry times. Organic material also enhances the soil's structure, aeration, and overall health, leading to greater long-term gardening performance.

Here at Kidadl, we have carefully created lots of interesting family-friendly facts for everyone to enjoy! If you liked our suggestions for why plants need water, then why not take a look at facts about why dogs cough or why dogs like peanut butter.

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Written by Akinwalere Olaleye

Bachelor of Arts specializing in English Literature

Akinwalere Olaleye picture

Akinwalere OlaleyeBachelor of Arts specializing in English Literature

As a highly motivated, detail-oriented, and energetic individual, Olaleye's expertise lies in administrative and management operations. With extensive knowledge as an Editor and Communications Analyst, Olaleye excels in editing, writing, and media relations. Her commitment to upholding professional ethics and driving organizational growth sets her apart. She has a bachelor's degree in English Literature from the University of Benin, Edo State. 

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