Calcium nutrition in relation to ozone damage of tobacco

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Proc. Amer. Phytopathol. Soc.; (United States)

OSTI ID:6297502

Trevathan, L E; Moore, L D

The effect of four levels of calcium on the sensitivity of Nicotiana tabacum var. North Carolina 88 to ozone was determined. Initially, seedlings were supplied with a complete nutrient solution containing Ca, N, K, P, Mg and S at levels of 200, 210, 235, 30, 24 and 96 ppm, respectively. After 18 days, this solution was replaced with those which provided 200, 100, 25 or 0 ppm Ca with all other elements supplied at initial levels. After an additional 18 days when plants were at the 8 to 9 leaf stage, they were exposed to 25 pphm ozone for 4 hours. Three days after fumigation, each leaf was rated according to the percentage of leaf surface damaged. Classic ozone symptoms were observed on middle aged leaves. They consisted of large irregular to rounded water-soaked lesions. At the time of rating these lesions were bifacially necrotic and dark tan in color. Leaf tissues of healthy and fumigated plants were analyzed spectrophotometrically for Ca levels. Positive correlations existed between levels of Ca supplied in the nutrient solutions and those detected in the foliage. An inverse correlation was observed between the level of Ca present in leaf tissue and its sensitivity to ozone injury.

• Research Organization: Virginia Polytechnic Institute and State Univ., Blacksburg
• OSTI ID: 6297502
• Journal Information: Proc. Amer. Phytopathol. Soc.; (United States), Journal Name: Proc. Amer. Phytopathol. Soc.; (United States) Vol. 2; ISSN PAPSD
• Country of Publication: United States
• Language: English

Related Subjects

560303* -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKALI METALS
ALKALINE EARTH METALS
BIOLOGICAL EFFECTS
CALCIUM
CORRELATIONS
DAMAGE
DOSE-RESPONSE RELATIONSHIPS
ELEMENTS
LEAVES
MAGNESIUM
METALS
NICOTIANA
NITROGEN
NONMETALS
NUTRIENTS
NUTRITION
OZONE
PHOSPHORUS
PLANTS
POTASSIUM
RESPONSE MODIFYING FACTORS
SEEDLINGS
SENSITIVITY
SULFUR