多效唑
开枪
赤霉素
干重
园艺
植物生长
橙色(颜色)
生物
化学
植物
标识
DOI:10.1016/0304-4238(86)90016-6
摘要
Sprays of gibberellin inhibitors (GI) paclobutrazol, XE 1019 or flurprimidol at 1000 mg 1−1 (active ingredient) to sour-orange seedlings (Citrus aurantium L.) reduced total (terminal + lateral) shoot growth, lateral growth, dry weight, leaf area per plant, area per leaf and leaf number, and increased root to top dry weight ratio. The magnitude of response to paclobutrazol and XE 1019 was similar, but greater than to flurprimidol. Branching was not affected by any GI's. Root length was reduced by all GI's, but the magnitude of response was similar with all chemicals. The effect of sprays on shoot growth lasted 7 weeks. Re-wetting of the plant surface induced recurrence of GI activity. Multiple sprays prolonged the inhibitory effect of chemicals on shoot growth. Flurprimidol and XE 1019 reduced leaf Cu level, and XE 1019 increased leaf Mg. Increasing the concentration of sprays from 1000 to 3000 mg 1−1 increased inhibition of shoot growth by flurprimidol, but the opposite was true for paclobutrazol.
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