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 )
