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2,4-二叔丁基苯酚对番茄叶霉病及幼苗生长的影响

周宝利**,李娜,刘双双,富饶,李桂香   

  1. (沈阳农业大学园艺学院, 沈阳 110161)
  • 出版日期:2013-05-10 发布日期:2013-05-10

Effects of 2,4-di-tert-butylphenol on tomato leaf mould and seedling growth.

ZHOU Bao-li**, LI Na, LIU Shuang-shuang, FU Rao, LI Gui-xiang   

  1. (College of Horticulture, Shenyang Agricultural University, Shenyang 110161, China)
  • Online:2013-05-10 Published:2013-05-10

摘要: 采用室内试验和田间试验相结合方式,研究了不同浓度(0、0.01、0.05、0.10、0.50和1.00 mmol·L-1)2,4-二叔丁基苯酚对番茄叶霉菌及番茄种子萌发幼苗生长的影响。结果表明:2,4-二叔丁基苯酚在叶霉菌培养的前阶段极显著地抑制了菌丝的生长,培养7 d时,0.1 mmol·L-1的抑制作用最大,抑制率为40%;在田间抗病性调查期间各浓度处理均提高了番茄幼苗的抗病性,其中以0.1 mmol·L-1处理抗病性最好,病情指数比对照降低了54%;低浓度2,4-二叔丁基苯酚促进了番茄种子的萌发,增加了幼苗的株高、茎粗、地上和地下部鲜质量、叶绿素含量、根系活力和幼苗体内保护酶活性,随着浓度增大,促进作用减弱甚至表现出抑制作用;而低浓度的2,4-二叔丁基苯酚降低了叶片丙二醛(MDA)含量和细胞相对电导率,且随浓度增加作用强度增大;浓度为0.1 mmol·L-1时,抑制作用最强。综合分析表明,2,4-二叔丁基苯酚对番茄植株及叶霉病具有调控作用,可以确定0.1 mmol·L-1为田间施加最适浓度。

关键词: 花粉限制, 处理水平, 花粉质量, 资源重新分配, 野慈姑

Abstract: By the methods of laboratory and field tests, this paper studied the effects of different concentrations (0, 0.01, 0.05, 0.10, 0.50, and 1.00 mmol·L-1) 2,4-di-tert-butylphenol on the tomato leaf mould, seed germination, and seedling growth. At the early stage of culturing tomato leaf mould, 2,4-di-tert-butylphenol had significant inhibition effect on the mycelium growth. When the mycelium growing to 7 d, 0.1 mmol·L-1 of 2,4-di-tert-butylphenol had the best inhibition effect. Field test showed that 2,4-di-tert-butylphenol at all test concentrations enhanced the disease resistance of tomato seedlings. The best effect was observed at 0.1 mmol·L-1 of 2,4-di-tert-butylphenol, and the disease index decreased by 54%, as compared to the control. 2,4-di-tert-butylphenol at low concentration promoted the seed germination, increased the plant height, stem diameter, plant fresh weight, leaf chlorophyll content, root activity, and plant defense enzyme activities, but decreased the leaf MDA content and relative electricity conductivity. With the increasing concentration of 2,4-di-tert-butylphenol, its promotion effect decreased while its inhibition effect increased, being the strongest at 0.1 mmol·L-1. It was concluded that 2,4-di-tert-butylphenol at 0.1 mmol·L-1 was the most suitable concentration to enhance the resistance of tomato plant against leaf mould and to regulate tomato seeding growth.

Key words: pollen limitation, experimental level, pollen quality, resource reallocation, Sagittaria trifolia.