soil plant water realation PPT.pptx

1. DEV BHOOMI UTTARAKHAND UNIVERSITY
Name: AKASH KUMAR
Roll No: 22MSCAG0004
Course: Soil plant water relation
Topic: Effect of water scarcity on plants
Summited To: Miss. Poonam Gussain
Summited By: Akash Kumar

2. EFFECT OF WATER SCARCITY ON PLANTS
• Water has a major role on earth. Every living being is benefitted from its
existence. But when it comes to plants, water is the only source that
prevents them from withering. Water helps the plants to germinate
naturally and grow as needed.
• And, when water shortage hits, the plants in the specific area are hit the
worst. Not just the plants, but the entire ecological system is impacted
too. And the scientists believe that the effect of water scarcity on plants
has a more significant impact on the overall genetic make-up of the
plants. In simple terms, the plants may exhibit differences. They may
undergo evolutionary changes and may look, behave, and work
differently to survive the current and future water stresses.

3. WHAT LEADS TO WATER SCARCITY IN A
PARTICULAR AREA?
Water shortage is caused due to various reasons like:
• Expanding human population
• Effect of water scarcity on plants
• Development of infrastructures
• Bad agricultural practices
• Rising industry demands
• Pollution of water sources
• Deforestation

4. HOW ARE THE PLANTS AFFECTD
The plants are impacted in multiple ways. Some effect of water
scarcity on plants is noticeable instantly, while others take the time
or need proper research to understand. As of now, let’s take a look at
some common effects of water scarcity.
1. WILTING.
One of the apparent signs of water scarcity on the plants is
wilting. The turgor pressure in plants that keeps the plant cells
inflated and erect is damaged. Without proper force, the cell in
the plant leaves starts to collapse, thus, causing them to limp.

5. 2. REDUCTION IN PHOTOSYNTHESIS.
Plants go through a process of photosynthesis to produce their
food. They require adequate water, sunlight, and carbon dioxide
to do so. But when there is a shortage of water, the plants may
slow down the process of photosynthesis or even stop it. And
due to this, the internal food supply becomes reduced or
diminished.

6. IF YOU COME ACROSS THE YELLOWING OF LEAVES, THEN
IT IS A COMMON SIGN OF STOPPED PHOTOSYNTHESIS.
1. Reduction in respiration.
Plants respirate heavily when they are breaking down their food supply
and using it as energy. But when there is less water involved in the
photosynthesis process, the plant’s system tends to work slowly. The
slowdown in the process of reparation can shunt the growth of the plant
or even cause discoloration. A healthy plant will end up dropping the
fruits or flowers when there is a reduction in the respiration process
because it becomes hard for the plant to carry extra baggage.

7. 2. Reduction in transpiration.
The circulation process in the plant’s system is termed as
transpiration. The plants use osmotic pressure to initiate
circulation. And when the water moves along through this
circulation process, it tends to supply vital nutrients and
minerals throughout the plant. Even waste product like oxygen
is transferred from the roots to the stomas. But, with lack of
water, the transpiration is stopped or slowed, causing the plant
to die from top to bottom.

8. 3. Alteration in developments.
Many plants have alerted their genetic make-up to cope with
the constant draught. For instance, water stress has lead to the
evolution of C4 and CAM (crassulacean acid metabolism).
Plants that have C4 metabolism tend to photosynthesize faster
and deeper within the plant tissue, thus, preventing water loss.

9. THANK YOU