Chai Yi-Qiu, Chen Li-Feng, Wang Jin-Sheng
Zhejiang Institute of Subtropical Crops, Wenzhou 325005, China.
Zhi Wu Sheng Li Yu Fen Zi Sheng Wu Xue Xue Bao. 2007 Aug;33(4):318-24.
The endogenous hormone ABA concentrations increased in the leaves, shoots and roots of sweet potato plants infected with Fusarium solani f. sp. batatas (FSB) or treated by its culture filtrate. The accumulation of ABA occurred firstly in the roots, but the highest concentration was in the shoots. The endogenous GA(1/3) concentration of leaves, shoots and roots of infected sweet potato kept at markedly low levels during the period of experiments.The ABA concentration of sweet potato seedlings increased observably after 9 h treatment with FSB culture filtrate, but decreased significantly after 15 h, and the GA(1/3) concentration increased markedly after 15 h treatment with 10(1), 10(2) dilution of FSB culture filtrate (after 12 h treatment with 10(3) dilution). The disease symptoms may be induced by the changes in concentration of ABA and GA(1/3) in the plants. The root rot-infected sweet potatoes grew upright without tailing, having aerial roots in knots near the ground, and were in full bloom in autumn.
感染茄病镰刀菌甘薯专化型（FSB）或用其培养滤液处理的甘薯植株，其叶片、茎和根中的内源激素脱落酸（ABA）浓度增加。ABA首先在根中积累，但最高浓度出现在茎中。在实验期间，受感染甘薯叶片、茎和根中的内源赤霉素（GA(1/3)）浓度一直保持在显著较低水平。用FSB培养滤液处理9小时后，甘薯幼苗的ABA浓度明显增加，但15小时后显著下降，而用10(1)、10(2)稀释的FSB培养滤液处理15小时后（用10(3)稀释处理12小时后），GA(1/3)浓度显著增加。植物中ABA和GA(1/3)浓度的变化可能诱发疾病症状。感染根腐病的甘薯直立生长而不拖尾，在靠近地面处有气生根结节，并且在秋季盛开。
