mineral nutrition Flashcards
in ____ technique. , plants are grown directly in a
soil-free, defined mineral solution
First, this technique was demonstrated by a German Botanist,____ in __ year
solution culture
Julius Von Sachs
1860
This soil-less growth of plants in a nutrient
solution is known as
Hydroponics
in hydroponics, The mineral solution is taken in sterilized glass jar or polythene bottles covered with black paper cause
minimizes the risk of algal contamination
reaction of roots to sunlight.
Hydroponics can be employed as a technique for commercial production of vegetables such as __, __ and ___
tomato,
seedless cucumber,
lettuce
The criteria to know the essentiality of an element was proposed by __ & ___ in __ year
Arnon and Stout in 1939.
give the 5 criteria for essentiality of mineral
- element must be absolutely necessary for supporting growth and reproduction. In absence of the element, the plants dont complete their life cycle or set the seeds.
- must be directly involved in metabolism of plant. It should form a component of either a structural or functional molecule.
- requirement of element must be specific and not replaceable by another element.
- Absence or reduced availability of element causes disorders.
- disorders caused by absence or deficiency of an element can be corrected only by availability of that element.
___elements have been found to be essential for plant growth and metabolism.
17
name the 9 macronutrients
c h o n p k ca s mg (memorize: kaun peeke cash maanga)
name the 8 micronutrients
fe mn cu mo b ni cl zn (memorize like: iron man ko mobile bhi nahi chahiye zaldi)
Macronutrients are present in large amounts in plant tissues, i.e., more than __ per kg of dry matter.
10 mmole
micronutrients are aka
trace elements
beneficial elements eg.
sodium, silicon, cobalt and selenium
macronutrirnts are usually involved in
synthsis of organic molecules
micronutrients are generally required in __`
functoning of enzymes
name the 4 structural elements
c h o n (memorize like कौन )
2 examples of energy related minerals
mg, p
how is mg an energy related minerals
Magnesium is a component of chlorophyll that takes part in conversion of light energy into chemical
energy
how is P an energy related minerals
Phosphorus is a component of ATP which functions as energy currency of the living systems.
Enzyme activators or inhibitor minerals (3)
mg2+
mn2+
zn2+
Mo
how is mg2+ a enzyme activators or inhibitor mineral
Mg2+ is an activator for both ribulose bisphosphate carboxylase-oxygenase (RuBisCO) and
phosphoenol pyruvate carboxylase (PEPCase), both of which are critical enzymes involved in carbon
fixation during photosynthesis.
how is zn2+ a enzyme activators or inhibitor mineral
zn2+ an activator of alcohol dehydrogenase
how is Mo a enzyme activators or inhibitor mineral
Mo is an activator of nitrogenase during the
nitrogen metabolism.
how is Mn2+ a enzyme activators or inhibitor mineral
Mn2+ is involved in photolysis of water
Maintaining osmotic potential minerals
Cl–, K+, sulphate
Osmotic potential is required for ____and maintenance of ____
water absorption
cell turgidity.
just read this
Phosphates, weak acids and their salts possess buffer activity against changes
in pH.
___ is the mineral element required by plants in the greatest amount.
nitrogen
how is nitrogen absorbed in plants
It is absorbed mainly as NO3– from the soil. It can also be taken up as NO2–or NH4+.
____ is one of the major constituent of proteins, nucleic acids, vitamins and hormones.
Nitrogen
