Responses of plants to stress, Biology

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.

Posted Date: 1/17/2013 8:05:28 AM | Location : United States







Related Discussions:- Responses of plants to stress, Assignment Help, Ask Question on Responses of plants to stress, Get Answer, Expert's Help, Responses of plants to stress Discussions

Write discussion on Responses of plants to stress
Your posts are moderated
Related Questions
Explain the Deficiency and Toxicity of vitamin A? Who defines VAD as tissue concentrations of vitamin A low enough to have adverse health consequences even if there is no evide

Q. To what substance is the acidic flavor of fermented milk due? Some bacteria ferment milk lactose by lactic fermentation producing lactic acid this product is responsible for

Name the four organisms which are currently in danger of extinction because of human activities?

Q. What is the valve that separates the right ventricle from the pulmonary artery? Why is that valve important? The pulmonary valve is important to prevent blood from the pulmo

What type of bonds is susceptible to hydrolysis? Book examples are C-N and C-OH.

Explain about the Texturization? Proteins constitute the basis of structures and texture in several foods, whether these come from living tissue (myofibrills in meat or fish) o

What is the generic function of leukocytes? What are leukocytosis and leukopenia? The generic function of leukocytes is to contribute in the defense of the body against strange

Non-succulent perennials These are actually the true xerophytes or drought resistants, because they possess a number of morphological, anatomical and physiological characterist

Question 1: What is the benefit of alternative splicing? Could there also be drawbacks of Alternative splicing? If yes, mention the same. Definitions of alternative splic

Applications of microbiology in different fields