不同磷供应对美国梧桐（Platanus occidentalis L.）幼苗生长及木质部汁液细胞分裂素水平的影响
Influence of Varied Phosphorus Supply on Growth and Xylem Sap Cytokinin Level of Sycamore (Platanus occidentalis L.) Seedlings.
作者信息
Dhillon S S
机构信息
Division of Forestry and Wildlife, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
出版信息
Plant Physiol. 1978 Apr;61(4):521-4. doi: 10.1104/pp.61.4.521.
Effects of varying levels of phosphorus (P) on sycamore (Platanus occidentalis L.) growth and on the endogenous cytokinin levels in the xylem sap were tested. The seedlings were grown in aerated nutrient solutions in the greenhouse. Photoperiod was held constant at 16 hours. Four P concentrations, 0.02, 0.10, 0.50, and 2 mm, were used. There were no P deficiency symptoms even at the lowest P concentration. The maximum growth occurred in seedlings grown in 0.10 mm P. The greatest dry matter yield as well as stem height, stem diameter, and leaf area were produced at 0.10 or 0.50 mm P. The amount of cytokinin in xylem sap for each harvest during P nutrition followed closely the dry matter values, stem height, stem diameter, and leaf area.
测试了不同磷（P）水平对美国梧桐（Platanus occidentalis L.）生长以及木质部汁液中内源细胞分裂素水平的影响。幼苗在温室中的通气营养液中培养。光周期保持恒定在16小时。使用了四种磷浓度，分别为0.02、0.10、0.50和2 mM。即使在最低磷浓度下也没有缺磷症状。在0.10 mM磷中生长的幼苗生长量最大。在0.10或0.50 mM磷时产生了最大干物质产量以及茎高、茎直径和叶面积。在磷营养期间每次收获时木质部汁液中的细胞分裂素含量与干物质值、茎高、茎直径和叶面积密切相关。
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