Functions and deficiency symptoms of Sulphur
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It is abundant in plant, particularly in the leaves. Plant absorbs as sulphate (SO42-) form. It does not easily translocated in plants.
Functions:
1. Required for synthesis of the S-containing amino acids like cystine, cysteine and methionine, which are important for protein synthesis. 2. Role in photosynthesis by involving in structural formation of chlorophyll in leaves. 3. It is a constituent of proteins and volatile compounds responsible for the characteristic taste & smell of plants in the mustard and onion families. 4. It enhances oil synthesis in crops 5. It is a vital part of Ferrodoxins (Non Heme iron, sulfur protein), S- adenosyl methionine.
Deficiency :
1. Pale yellow or light green leaves in younger leaves (Deficiencies resemble those of nitrogen) 2. Stalks are short & slender, growth is retarded. 3. Fruits often do not mature fully & remain light green in colour. 4. In Brassica species, leaves shows cupping & curling. 5. Cell division is retarded & fruit development is suppressed. 6. Disrupts N metabolism, reduces protein quality & induces starch (carbohydrate) accumulation. S- Toxicity: Sulphide injury, necrosis of the leaves.
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Last modified: Friday, 2 December 2011, 7:30 AM