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Abstract
Treatment of Spathiphyllum ‘Tasson’ with BA as a soil drench at 250, 500, and 1000 mg/liter significantly increased the number of basal shoots compared to untreated plants, or plants treated with a foliar BA spray. The largest increase in number of shoots on drenched plants occurred during the first 8 weeks following treatment. Increase in height of drenched plants was less compared to untreated or sprayed plants after 20 weeks. Fresh weight of main stems from sprayed and drenched plants (less roots) was less than controls, whereas fresh weight of basal shoots was greater for treated plants. Combined weights of the main shoot and basal shoots for all sprayed and drenched plants were not significantly different. Chemical name used: N-(phenylmethyl)- 1H-purin-6-amine (BA).
Abstract
Aglaonema ‘Silver Queen’ exposed to 4.5°, 13°, or 21°C for 10 hr each night for 1, 3, or 6 nights exhibited visual damage that increased as temperature decreased or as length of exposure increased. Growth index was negatively correlated with length of exposure in growth chambers, but exhibited no response to temperature. Leaf areas of new leaves exhibited reduced values at the lowest temperature and longest durations, but measurements of effusate conductivities, total leaf area, and number of new leaves were not affected by treatments. Microscopic examination of visually damaged leaves showed collapsed epidermal cells, while stem sections of chilled plants had a reduced number of starch grains.