Give in detail about the vitality of Boron and Zinc in plant nourishment.

Explanation

Zinc (Zn) : Essential for the sythesis of Indole acetic acid (Auxin) activator of carboxylases, alcohol dehydrogenase, lactic dehydrogenases, glutamic acid dehydrogenase, carboxy peptidases and tryptophan synthetase. It is absorbed as `Zn^(2+)` ions.
Deficiency : Little leaf and mottle leaf due to deficiency of auxin, Inter veinal chlorosis, stunted grwoth, necrosis and Khaira disease of rice.
Boron (B) : Translocation of carbohydrates, uptake and utilisation of `Ca^(++)`, pollen germination, nitrogen metabolism fat metabolism, cell elongation and differentiation. It is absorbed as borate `BO^(3-)` ions.
Deficiency : Death of root and shoot tips premature fall of flowers and fruits, brown heart of beet root, internal cork of apple and fruit carcks.