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Crop Physiology Important Table- 1

Crop Physiology Important Point

Crop Physiology Important Point

Crop Physiology Important Point For All Competitive Exam

 1.Difference between C3, C4, & CAM plants (AgriExam.com) 

C3 PlantsCPlantsCAM Plants
Site of the cycle i.e. leaf structure
Mesophyll Mesophyll and Bundle sheath cellMesophyll and vacuole
CO2, acceptor
RuBPPEPBoth
1st stable compound
3C PGA4C OAA or Malic acidBoth
Dark reaction through
Calvin cycleHatch & Slack cycle and calvin cycle
Pigment system (PS) present in chloroplast
Both PS-I & PS-II PS-I
Compensation point
50 ppm
1-5 ppm
Photosynthetic rate
MediumHighSlow
Biomass production 
mediumHighSlow
Photo-respiration
HighLow/AbsentSlow
Transpiration rate
HighMediumLow
Water use efficiency
LowMediumHigh
Light saturation point
LowHighMedium
Energy recruitment (CO2:ATP:NADPH)
1:3:21:5:2
Optimum Temperature
10-25°C30-45°C
25°C
ATP require for one glucose molecule
18 ATP30 ATP

 2.Difference between active and water absorption (AgriExam.com) 

Active water absorptionPassive water absorption
it occurs mainly due to the activity of root hairs.Needs energy.It occurs mainly due to the activity of upper part of plant such as shoot and leaves
The water is absorbed due the osmotic and non osmotic mechanismsThe water is absorbed by to the process of active transpiration in the upper part.
The osmotic process involves diffusion pressure deficit of the cellsThe passive absorption occurs due to the tension created in xylem sap by transpiration pull.
The water first enters into the cell sap and then passes from one cell to another (symplast movement).The water in passive absorption moves probably through the free spaces (apoplast movement).

 3.Difference between Transpiration & Guttation (AgriExam.com) 

TranspirationGuttation
Occurs in dayOccurs in night
Water loss in the form of vapourWater loss in the form of liquid
Occurs through stomata, lenticle or cuticlesoccurs through hydathodes
It is a controlled phenomenonIt is a uncontrolled phenomenon

 4.Essential amino acids: (They cannot be synthesized in our body) 

These are ten in number (Tricks ‘TV,MILL, PATH’) (AgriExam.com)
TTryptophan
VValine
MMethionine
IIso-leusine
LLeucine
LLysine
PPhenyl-alanine
AArginine
TThreonine
HHistidine

 5.Sulfur-containing amino acids (AgriExam.com)

Sulfur-containing amino acids
Methionine
cysteine
homocysteine
taurine

 6.Essential fatty acids (AgriExam.com)

Four in number, (Tricks ‘OLLA’)
OOleic acid
LLinoleic acid
LLinolenic acid
AArechidonic acid

 7.CARBOHYDRATES (AgriExam.com) 

Organic compounds with a general formula (CH2O).
Carbohydrates can be classified into 3 categories, based on degree of polymerization

CARBOHYDRATES (AgriExam.com)
Monosaccharides (one sugar molecule)
Glucose, Fructose, Galactose
Disaccharides (two sugar molecule)
SucroseGlucose+ Fructose
LactoseGlucose+Galactose
MaltoseGlucose+Glucose
Oligosaccharides (two to ten sugar molecules)
Raffinose, Stachyose
Polysaccharides (ten or more sugar molecules)
Starch, Glycogen, Cellulose
  • Fructose is the sweetest among all the sugar
  • Sucrose is non – reducing sugar
  • Lactose is a milk sugar
  • Maltose sugar found in germinating seed
  • Glycogen is present only in animal cells.
  • Maximum part of plant cell wall is made up of Cellulose

Crop Physiology Important Point

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Updated: 2019-12-11 — 11:34 pm

2 Comments

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  1. Its vry dificult for me bt u makes it vry esy thnku

  2. Sir plss add more physiology part based on compititive exam.and plss cover plant growth regulator

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