BotanyStatement A: Manganese toxicity symptoms include chlorosis and necrosis (brown spots).Statement B: Excess of Mn inhibits the translocation of Calcium to leaves from roots

Statement A: Manganese toxicity symptoms include chlorosis and necrosis (brown spots).

Statement B: Excess of Mn inhibits the translocation of Calcium to leaves from roots

  1. A

    Both statements A and B are correct.

  2. B

    Statement A is correct and B is incorrect.

  3. C

    Both statements A and B are incorrect.

  4. D

    Statement A is incorrect and B is correct.

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    Solution:

    Excess of Mn inhibits translocation of Ca and as result young leaves show necrosis or brown spots. Since it also inhibits the uptake of iron and magnesium, chlorosis symptoms are also seen in old and young leaves. Young leaves shows necrotic areas surrounded by chlorotic veins.

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