Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Effects of Plant Growth Regulators on Development
Like animals plants require input of energy from the outside environment to sustain growth and development. But unlike animals, plants can draw energy directly from sunlight and by using water and a few essential mineral nutrients from soil, can synthesize the molecules that constitute their structure and function (autotrophic). There are parasites, semi-parasites, saprophytes and insectivorous plants which are exceptional to this generation There are certain physical factors like light, temperature, gravity and touch which trigger one or other physiological processes like flowering, germination, chlorophyll development etc. or modify the pattern and direction of growth e.g. phototropism, geotropism and hydrotropism responses. There are also certain chemical substances endogenously present in plants which at a very low concentration initiate a particular physiological process like enhancement of production of a-amylase in barley seed endosperm or acceleration of a specific m-RNA or initiation of a major physiological process-involving number of specific steps like germination, flowering, senescence, etc. There are just five plant growth regulators in plants.
They are auxins, gibberellins, abscisic acid, cytokinins and ethylene. They are also called as plant hormones. But, the term hormone is in fact borrowed from animal, as hormones were first discovered and ' well characterized in animal systems. Unlike in the case of animals, each one of these five groups of 'plant hormones' can influence/ initiate a number of physiological processes. The same hormone can promote growth at one concentration and retard growth at some other concentration in the case of same organ like a shoot, bud, root etc. Same physiological process like germination can be influenced positively by two different types of hormones (gibberellins and cytokinins). Plant physiologists have recommended the use of the phrase "plant growth regulators" (PGRs) to these compounds.These are naturally occurring as well as synthetic compounds which can be included under PGRs. Some scientists call the former as hormones. In recent times there is much discussion whether the term hormone should be used for plants as plant and animal hormones are markedly different in their origin, structure and mode of action.
The simplified Bernoulli equation may be applied to peak velocity measurements to make non-invasive estimates of pressure gradients. Where Vl = peak velocity proximal to an obstr
Explain about the Pharmaceutical Management? A person with BMI 30 and above may require pharmaceutical management in addition to dietary and lifestyle modifications. It may als
Define Interaction of vitamin c with Ascorbic acid and Leucine? Ascorbic acid : The biologically active form, ascorbate, is a cofactor or co- substrate for eight isolated enz
Carbon is important constituents of all organic compounds. It forms 49% of dry weight of the organisms. Earth atmosphere contains 0.03% carbon dioxide gas. The c
1. Biogas is produced by the activity of aerobic bacteria on animal waste 2. Methanobacterium is an aerobic bacterium found in rumen of cattle 3. Biogas, commonly called goba
Because of developmental abnormality, the wall of left ventricle of an infant's heart is as thin as that of right ventricle. What would be its explicit effect on circulation of blo
Protozoans - Body Form The protozoan body is usually bound only by the cell membrane called plasmalemma. In some protozoans such as in ciliates the rigidity and the flexibili
Q. Why is it significant for chromosomes to be condensed during mitosis and decondensed during interphase? During mitosis the major problem to be solved is the correct separati
CRANIU M - Large, hollow, rounded part of the skull. It's cavity is cranial cavity in it brain is protected. Such animals in which cranium present grouped in craniata.
A v i a n leukosis (Sarcoma group of retroviruses) This is a complex of viral diseases caused by an avian retrovirus with various manifestations such as lymphoid leukosis,
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!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd