摘要
用１００、５００、１０００ｐｐｍ－浓度的５４０６细胞分裂素和稀土分别诱导群众杨的离体枝条，３ｄ后进行接种。实验证明，用“５４０６”发病率降低了６３．３％～７０％，病情指数降低了５１．５～６５．２；用稀土发病率降低了６０％～７０％，病情指数降低了２９．１～７３．９。接种后的群众杨皮部ＳＯＤ活性在７２～９６ｈ内达到最高峰，以后逐渐下降，并趋于稳定；呼吸强度４８ｈ达到最大值，９６ｈ明显减弱，并基本稳定。发病后，皮部总蛋白含量增加１．７～４．４倍（对照总蛋白含量仅增加０．９倍），增加的量随诱导剂的浓度增大而增多。
The branches of Populus X xiaozhuanica cv. ‘popularis ’are induced
byrare-earth and Streptomyces jingyanesis 5406( three concentrations of 1 00,500 and 1
000ppm in both inducers),then inoculated with Dothiorella gregaria. After challenged
inocula-tion,the incidence of disease and disease index dropped with a reduction of 60%～
70%and29.1～73.9 for the formor and 63.3%～70%and 51,5%～65.2%for the latter
respective-ly. The mechanism of resistance to canker disease is a series of physiological
changes takingplace in the bark of branches after induction. The activity of superoxide reached
the maxi-mum after 72～96 hours and then dropped gradually and tended to be stable,the
activity ofSOD in the induced branches are higher than that in the control ones;the respiration
came tothe maximum after 48 hours and got weak after 96 hours when disease is going on the
totalprotein of induced branches increased by 2.7～5.4 times while that of the control only
1.9times,The changes above are related to the concentration of inducers with the larger
theconcertration the better the effect.
出处
《林业科学研究》
CSCD
北大核心
1995年第1期78-81,共4页
Forest Research
关键词
杨树
溃疡病
诱导
抗性育种
抗病性
Populus X xiaozhuanica cv.
‘popularis’,poplar canker disease ,inducedresistance, resistance breeding
