Two light sources differentially affected ferric iron reduction and growth of cotton

In growth chambers, low pressure sodium (LPS) plus incandescent (Inc) lamps and fluorescent cool-white (FCW) plus Inc lamps were used to determine their effects on growth of cotton (Gossypium hirsutum L.) and on the reduction of Fe3+ to Fe2+. Cotton plants grown under LPS + Inc light developed chlor...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1979-04, Vol.63 (4), p.692-695
Main Authors: Brown, J.C, Foy, C.D, Bennett, J.H, Christiansen, M.N
Format: Article
Language:English
Subjects:
Citrates
Cotton
Hypochromic anemia
Iron
Lamps
Nutrient solutions
Phytotrons
Plant growth
Plant roots
Plants
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Summary:In growth chambers, low pressure sodium (LPS) plus incandescent (Inc) lamps and fluorescent cool-white (FCW) plus Inc lamps were used to determine their effects on growth of cotton (Gossypium hirsutum L.) and on the reduction of Fe3+ to Fe2+. Cotton plants grown under LPS + Inc light developed chlorosis and grew poorly, whereas plants grown under FCW + Inc lights were green. The chlorophyll concentration and top and root weights of cotton grown under LPS + Inc were lower than those under FCW + Inc. In solution, FCW + Inc lamps reduced about eight times more Fe3+ to Fe2+ than did LPS + Inc lamps. Fe3+ is transported to plant tops as Fe3+ citrate and if we assume that FCW + Inc light reduces Fe3+ to Fe2+ in plant foliage as it did in the solutions, then reduction of Fe3+ by the light environment will make Fe2+ in the tops more available for biochemical reactions.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.63.4.692