Download Role of mineral nutrient in plant Metabolism File

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1.SOIL AND WATER RELATION,
2.WATER AND ITS ROLE IN PLANT ,
3. PROPERTIES AND FUNCTION OF WATER
IN THE CELL WATER RELATIONS OF WATER IN
CELL WATER RELATION S TERMINOLOGY,
4 WATER POTENTIAL OF PLANT CELL.
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Plants absorb water from soil by their
roots .
Soil water means water present in soil /
Plant absorb water from the soil is by their
roots .
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Holard – The total amount of water present
in soil is termed as Holard.
Chesard – Available water to plant is called
Chesard .
And which can’t be avaible to plant is
termed as Ehard.
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A part of water percolates downwards
through large pores between the soil
particles under the influences of gravity
and it’s called gravitational.
In case the gravitational water is available
to the plants it’s absored .
A good amount of water is retained by the
soil particles and known as FIELD
CAPACITY MOITURE.
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2. This water present in a three form
A. Capillary water- The water present in the
intercellular space of soil partical is called capillary
water.
B. Hygroscopic water- The water which is present
around the soil partical in the form of vapour
C. Crystelline water OR Chemically combined waterChemically bound to the soil partical is called as a
chemically combined water .
Ex. CuSO4, 5 H2O.
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3. Water absorbing parts of plant
The water required by plant is observed by
the roots but absorption of water by leaves
and stem has also been found in a few plant
Hydrophytes absorb water by general surface
Wood (1925) reported that Ikochia bosia and
Rhoagidia absorbed water in appreciable
amount from atmosphere
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Water is terms from the OH-and H+ atom
Necessary to plant life required in largest
amount
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Persent throuhout plant body
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The evaporating surface fo mesophyll cells
1.PHYSICAL PROPERTIES WATER
A.specific heat: The amount of heat energy
required to raise the tempreture of unit mass
of substance 1 is called as specific heat .
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Latent Heat Of Vaporization.
It’s the energy required to convert liquid into
gas phase at constant tempature .
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Latent Heat Of fusion.
It’s the heat energy required to convert to
unit mass of solid to a liqid at same
tempature.
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WATER EXPANSION AND DENSITY –Water has
a density to expand as it’s density is
decreased therefore ice has lower density
water reaches is minimium density.
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Cohesive and Adesive properties .
The mutual force of attraction between like
molecules such as in water it’s called as
cohension .
Attraction of water to a solid phase such as
cell wall or glass surface is called as adesion.
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Water as solvent - Variety of subtences can
readily in water .
Water is especially powarfull solvent for
electrolyte and other subtences such as
sugar , protins etc.
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1 Major constituent of protoplasm . 90 to 95
percent of it’s weight .
2 Water is solvent in which mineral nutrient s
enter a plant from soil solution .
3 In which mineral nutrients are transported
from one part of cell to another from cell to
cell , tissue to tissue , and organ to organ.
place to other place
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4 Water is medium in which many metabolic
reaction occurs.
5 Water is reactant in a number of metabolic
reactions .
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6 Water imparts turgidity to growing cell and
thus maintains their form and structure .
7 Water provides mechnical support and
turgidity to nonlignified plant cell.
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8 Elongation phase of cell growth depends on
asorpation of water .
9 Water is mtabolic end product of
respiration .
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10 More water is absorbed by plants and
greater amount of water are lost by plants
than any other subtances .
11 Water plays very important role of thermal
regulation against high tempature .
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In the plant and soil the potential energy of
water is called as water potential .
The chemical potential of water  free energy
per mole.
Symbolized the by the greek letter psi
w .
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Expressed as force per unit area .
Unit measurment is usully the Bar / Pascal.
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Pure water has water potential equal to 0
bar .
Water potential in plants and soil is usully
less than 0 bar .
Which means it’s negative value.
More negative value the lower water potential
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Lower the water potential in plant cell or
tissue the grater it’s ability to absorb
water .
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Higher the water potential the greter it’s
the ability to tissue to supply water to
other m ore desicated cells and tissue .
Water potential used to measure water
deficit and water stress in plant cell tissue.
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