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Flashcards in part 2 Deck (8)
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1

magnesium

essential for binding components of ribosomes
absorbed in the form of divalent Mg2+. forms part of the chlorophyll molecule

2

magnesium's deficiency symptoms

1. interveinal chlorosis with purple anthocyanin pigmentation
2. chlorotic areas may turn necrotic

3

sulphur

constituents of amino acids: cysteine and methionine
present in coenzyme A, vitamins(thiamine and biotin)

4

sulphur's deficiency symptoms

1. chlorosis
2. reduced nodulations in legumes

5

iron

1.imp. constituent of proteins involved in the transfer of e- like ferredoxin and cytochrome
2.reversibly oxidized from Fe3+ to Fe2+ during e- transfer
3.activates catalase enzyme

6

iron deficiency sysmptoms

interveinal chlorosis in the young leaves

7

manganese and its deficiency symptoms

1. activates enzyme of respiration, photosynthesis and nitrogen metabolism
deficiency: 1. causes grey peck of oat
2. marsh spot disease of pea

8

molybdenum and its deficiency symptoms

required for nitrogen fixation and activates nitrate enzyme reductase
deficiency: 1. mottled chlorosis with marginal necrosis
2, abscission of flowers