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NAME: MOHD SALEEM
ROLL NO: 14BTM28
ENROL NO: GI3742
CLASS: MSc. FINAL
MOHD SALEEM
MSc Botany
Advanced plant physiology
Contents
 sulfur general properties
 Sulfur cycle
 Source and available form
 Sulfur assimilation
 Role of sulfur
 Physiological role
 Catalytic role
 Role in stress
 Deficiency symptoms
 Toxicity symptoms
General Introduction Of Sulfur
Origin of the name Latin word “sulfurium’’
meaning Sulfur
Phase Solid.
Group, Period and Block 16, III, P
Atomic number 16
Relative atomic mass 32.066
Melting Point 115.21oC
Boiling Point 444.6 oC
Concentration in plants 0.05 – 1.5%
Role of Sulfur in plants
Source and available form of sulfur
 Occurs in both organic and inorganic forms.
 In soil S mainly occurs in minerals – pyrite,
cobaltite, gypsum, epsomite and in soluble form as
sulfate.
 Gaseous form of S : Sulfur oxides and hydrogen
sulfide.
 Mainly S is taken in the form of divalent anion sulfate
(SO4
2-).
 Through biological oxidation organic S is made
available to plants.
 Sulfate ions are reduced to sulphydryl group (-SH)
in plants.
Sulfur Assimilation
Sites of S assimilation in a cell
Physiological role of Sulfur
4th essential macronutrient after N, P &K. Group1
It is a constituent of :-
• Amino acids- Cysteine, Cystine and Methionine.
• Ferrodoxin.
• Volatile oils- Isothiocyanates and thiocyanates.
• S-adenosyl methionine (SAM).
• Sulfolipids.
• Vitamins- Thiamine, biotin and lipoic acid and
coenzyme A.
• Glutathione - GSH
Catalytic role of Sulfur
 Thiamine- TPP, lipoic acid and Co-A
 Pyruvate dehydrogenase complex enzyme(PDH)
 Oxoglutarate dehydrogenase etc.
Continued…..
• Biotin
Pyruvate carboxylase
Acetyl CoA carboxylase
Role of Sulfur in stress
Both abiotic and biotic stresses
S-assimilation linked with antioxidant
system under stress condition
Deficiency symptoms of Sulfur
Immobile
 Chlorosis in leaves – tea yellow disease
Leaf tips and leaf margins roll inward
Protein synthesis – reduced
Inhibits nodule formation
Chlorophyll - protein complexes impaired
synthesis
Stem – hard
 Deficiency symptoms
corn Tabacco
Stages of sulfur deficiency in Cannabis
Role of Sulfur in plants
Toxicity symptoms
• Rare
• Reduced leaf size and overall growth
• Yellowing of leaf or scorched at edges
• Induces deficiency to other nutrients by competition
Role of Sulfur in plants

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Role of Sulfur in plants

  • 1. NAME: MOHD SALEEM ROLL NO: 14BTM28 ENROL NO: GI3742 CLASS: MSc. FINAL MOHD SALEEM MSc Botany Advanced plant physiology
  • 2. Contents  sulfur general properties  Sulfur cycle  Source and available form  Sulfur assimilation  Role of sulfur  Physiological role  Catalytic role  Role in stress  Deficiency symptoms  Toxicity symptoms
  • 3. General Introduction Of Sulfur Origin of the name Latin word “sulfurium’’ meaning Sulfur Phase Solid. Group, Period and Block 16, III, P Atomic number 16 Relative atomic mass 32.066 Melting Point 115.21oC Boiling Point 444.6 oC Concentration in plants 0.05 – 1.5%
  • 5. Source and available form of sulfur  Occurs in both organic and inorganic forms.  In soil S mainly occurs in minerals – pyrite, cobaltite, gypsum, epsomite and in soluble form as sulfate.  Gaseous form of S : Sulfur oxides and hydrogen sulfide.  Mainly S is taken in the form of divalent anion sulfate (SO4 2-).  Through biological oxidation organic S is made available to plants.  Sulfate ions are reduced to sulphydryl group (-SH) in plants.
  • 7. Sites of S assimilation in a cell
  • 8. Physiological role of Sulfur 4th essential macronutrient after N, P &K. Group1 It is a constituent of :- • Amino acids- Cysteine, Cystine and Methionine. • Ferrodoxin. • Volatile oils- Isothiocyanates and thiocyanates. • S-adenosyl methionine (SAM). • Sulfolipids. • Vitamins- Thiamine, biotin and lipoic acid and coenzyme A. • Glutathione - GSH
  • 9. Catalytic role of Sulfur  Thiamine- TPP, lipoic acid and Co-A  Pyruvate dehydrogenase complex enzyme(PDH)  Oxoglutarate dehydrogenase etc.
  • 11. Role of Sulfur in stress Both abiotic and biotic stresses
  • 12. S-assimilation linked with antioxidant system under stress condition
  • 13. Deficiency symptoms of Sulfur Immobile  Chlorosis in leaves – tea yellow disease Leaf tips and leaf margins roll inward Protein synthesis – reduced Inhibits nodule formation Chlorophyll - protein complexes impaired synthesis Stem – hard
  • 15. Stages of sulfur deficiency in Cannabis
  • 17. Toxicity symptoms • Rare • Reduced leaf size and overall growth • Yellowing of leaf or scorched at edges • Induces deficiency to other nutrients by competition