Response of Tomato Fruiting to Hydrogen Fluoride as Influenced by Calcium Nutrition

Effects of Hydrogen Fluoride on Bean Reproduction

“…The high frequency (30%) of the abnormalities among the progeny of the control plants grown in low calcium nutrient solution is consistent with the previously noted relationship between effects of HF and calcium insufficiency. 8 The number of individuals in many of the progeny lines shown in Figure 4 was not very large, but the consistency of the results provides quite conclusive evidence of the heritability of the abnormal trifoliate leaf characteristic.…”

“…A low (40 ppm) calcium nutrient solution was used for the plants exposed to 9.1 /xg F/m 3 and the concomitant control plants, in an attempt to accentuate the response to fluoride. 8 A solution containing 200 ppm calcium was used for all other plants.…”

Response of Strawberry Fruiting to Hydrogen Fluoride Fumigation

“…A complete nutrient solution was used at half its standard concentration. 5 The pots were automatically subirrigated three times daily from separate reservoirs of solution in each chamber. Three times a week the used solution was discarded, and fresh solution was added through the pots to flush out accumulated salts.…”

“…The author found that tomato plants in growth chambers produced smaller fruit with fewer seeds under long-term exposure to HF at about 6 /xg F/m 3 than in a control atmosphere. 5 Likewise, bean plants grown at 2 fig F/m 3 and higher had fewer fruit, fewer seeds per fruit, and lower seed starch levels than controls. 6 These investigations indicated that HF affects fruiting directly, possibly by interfering with fertilization or seed development.…”

Effects of hydrogen fluoride on production and organic reserves of bean seed

“…If fluoride reduces the total leaf area or injures the leaves of plants, fruit production logically may be less, simply because of reduced photosynthetic capacity of the foliage; but the author found evidence of a direct effect of fluoride on tomato fruiting (Pack, 1966). Tomato plants exposed to HF at 6 µg (F)/m3 from 45 days after seeding till harvest produced smaller fruit than plants grown in a filtered atmosphere.…”