Mineral NutritionHard
Question
An element playing import role in nitrogen fixation is
Options
A.molybdenum
B.copper
C.managanese
D.zinc
Solution
Molybdenum is absorbed as molybdate by plants. It is involved in nitrigen metabolism including nitrogen fixation. It is component of enzyme nitrogenase and acts as enzyme activator Its dificiency causes chlorosis and necrosis, whiptail of cauliflower and premature leaf fall.
Copper is absorbed by the plant in ionic form. Its dificiency causes necrosis, die back in Citrus, reclamation in legumes.
Manganese is absorbed by the plants as bivalent ion. It acts as enzyme activator. Its dificiency causes interveinal chlorosis as well as yellowing of starch and their subsequent degenrate.
Zinc is needed for bbiosynthesis of IAA and also acts as enzyme activator. Its dificiency causes chlorosis, little leaf, rosette, white bud of maize and mottling of leaves.
Copper is absorbed by the plant in ionic form. Its dificiency causes necrosis, die back in Citrus, reclamation in legumes.
Manganese is absorbed by the plants as bivalent ion. It acts as enzyme activator. Its dificiency causes interveinal chlorosis as well as yellowing of starch and their subsequent degenrate.
Zinc is needed for bbiosynthesis of IAA and also acts as enzyme activator. Its dificiency causes chlorosis, little leaf, rosette, white bud of maize and mottling of leaves.
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