Responses of plants to stress, Biology

Assignment Help:

Responses of Plants to Stress

You know that certain plant species can grow in severe environmental extremes. For example, plants grow below 0°C in the Himalayas and above 45°C in deserts of Rajasthan. The optimal requirements of water, temperature, light intensity, nutrients and soil vary from species to species. Have you ever wondered why grasses flourish in highlight intensities while growth of many plants comes to a halt or is even inhibited? How do rice plants grow under waterlogged condition while maize and wheat cannot? How do thermophiles remain functional above 70°C, though their cells are also composed of molecules that are broadly similar structurally and functionally to those present in cells of other organisms? Again, why are metabolic reactions of thermophiles not disrupted even at 70°C or is there anything special about the enzymes that-allow certain species to function optimally at very high temperature and certain others at extremely low temperature. In this unit we will try to find answers to such questions. We will see what are the molecular responses of certain plant tissues that help them to cope environmental extremes - high temperature and light intensity.

Extreme pH of soil, salinity and mineral deficiency drastically limit the total arable land available for the growth of crops, fruits, vegetables and other useful plants in our country and elsewhere in the world. It is estimated that over 50% of the potential crop is lost because of stress of various kinds. Scientists are now studying the responses of plants to various stresses in the laboratory and field conditions. The aim is to get maximal yields despite all deviation from necessary optimal conditions for plant growth in the natural environment. In this unit you will find that results of preliminary studies on plant responses to various kinds of stresses look quite promising and we can hope that it should be possible to manipulate plants by genetic engineering so their performance is improved even under stress conditions.


Related Discussions:- Responses of plants to stress

Adenosine diphosphate (adp), ADP is lower energy form of ATP, containing tw...

ADP is lower energy form of ATP, containing two (in spite of the three in ATP) phosphate groups attached to the adenine base and ribose sugar.

Explain negative staining technique, Explain Negative Staining Technique? ...

Explain Negative Staining Technique? Here, a stain has a negatively charged chromophore that is repelled by the negative bacterial surface. It results in indirect staining of m

What is the spontaneous generation hypothesis, What is the spontaneous gene...

What is the spontaneous generation hypothesis? The spontaneous generation hypothesys, or abiogenesis, asserts that life on earth has come from nonliving material. For instance,

Endosperm of gymnosperms and the endosperm of angiosperms, How dissimilar a...

How dissimilar are the endosperm of gymnosperms and the endosperm of angiosperms? In the gymnosperms the endosperm is haploid (n), it is called as primary endosperm. In the ang

Define discovery of other essential nutrients, Define Discovery of other Es...

Define Discovery of other Essential Nutrients? Following the identification of the food factors involved in beriberi, pellagra and scurvy, the search was on for other water-sol

Simple cuboidal epithelium and columnar epithelium, Q. How different is the...

Q. How different is the simple cuboidal epithelium from the columnar epithelium? Where can these epithelia are found in the human body? The simple cuboidal epithelium is made o

How many types of gametes can be formed, How many different types of gamete...

How many different types of gametes can be formed by individuals of the following genotypes? What are they in each case a) AaBb b) AaBB c) AaBbCc d) AaBBCc e) AaBbcc f) AaBbCcDdEe

Respiration, comparitive chart on different types of respiration obserbed i...

comparitive chart on different types of respiration obserbed in different type of respiration organ of respiration , types of respiration,energy obtained , by product formed

#title.circulatory system, #question.what is the mechanism of circulatory s...

#question.what is the mechanism of circulatory system .

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd