Sulphur-Role in Plant Growth:

Sulphur is essential for the growth and development of all crops, without exception. Most of the plant's requirement of S is absorbed through the roots in the sulphate (SO4-2) form.
Like any essential nutrient, sulphur also has certain specific roles to play in the plants. Such roles cannot be replaced by any other nutrient. That is why S deficiencies can only be corrected by augmenting S supply.

Some key functions of S are:
  • Protein production, primarily because it is a constituent of the three main amino acids (cysteine, cystine and methionine), which are the building blocks of protein. About 90% of plant sulphur is present in these amino acids.

  • Formation of chlorophyll, the green substance in leaves and other above-ground plant parts that permit photosynthesis. Plants produce starch, sugar, oils, fats,  vitamins and other vital compounds through photosynthesis.

  • Synthesis of oils. This is why adequate sulphur is so crucial for oilseeds.
  • Activation of enzymes, which act as catalysts in biochemical reactions within the plant.
  • Groundnut with S (R), without S (L)
    Groundnut with S (R), without S (L)
  • Sulphur increases crop yields and improves produce quality, both of which are important for determining the market price a farmer would get for his produce.
  • Specifically with reference to quality, S improves oil percentage in seeds, plant protein  content, cereal quality for milling and baking, marketability of copra, quality of tobacco, forages etc.

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