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Effects of Sulfur Deficiency on Growth and Metabolism of Tomato

1951; University of Chicago Press; Volume: 112; Issue: 3 Linguagem: Inglês

10.1086/335664

1940-1205

S. V. Eaton,

Nitrogen and Sulfur Effects on Brassica

1. Symptoms of sulfur deficiency developed quickly in tomato plants. They were: chlorosis of leaves, the upper leaves becoming yellow first, anthocyanin development in leaves and stems, small leaves with stiff texture, and thin stems. 2. Minus-sulfur stems were high in starch, sucrose, total soluble nitrogen, and the soluble nitrogen fractions-ammonia, amides, and nitrates-but low in reducing sugars as compared with plussulfur stems. 3. The above results agreed well with those of previous studies by the writer on the effects of sulfur deficiency on soybean, sunflower, and black mustard and in most respects with data of Nightingale et al. for tomato plants grown at New Brunswick, New Jersey. Their results differed in two main respects from those obtained by the writer. They found that the lower leaves became chlorotic first and that reducing sugars accumulated in minus-sulfur stems along with other carbohydrates. 4. It is concluded that variations in atmospheric conditions probably accounted for differences in effects of sulfur deficiency on tomato plants grown at Chicago and at New Brunswick. 5. In the discussion sections of the present paper and of other papers by the writer (2, 3, 4), especially the one on black mustard (4), are found summaries with interpretations of the effects of sulfur deficiency on plants in general.