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该文以小麦(Triticum aestivum)幼苗为受体作物,采用培养钵沙培法,研究了不同浓度(0、10、40、160 g/L)红小豆根系、茎、叶片、根际土壤水浸提液对小麦幼苗的化感作用。结果表明,根水浸提液对小麦幼苗株高、幼叶长均表现出低浓度促进高浓度抑制,而对小麦幼苗根长、侧根数及地下干重均表现出低浓度抑制高浓度促进;根际土壤、茎、叶片水浸提液对小麦幼苗株高、幼叶长具有抑制作用,并随浓度增加抑制作用逐渐加强;红小豆根系、根际土壤水浸提液在低浓度时,增强了小麦幼苗的超氧化物歧化酶(SOD)活性和过氧化物酶(POD)活性,降低了幼苗叶片的叶绿素含量及丙二醛(MDA)含量;红小豆叶片水浸提液在高浓度时,降低了小麦幼苗的根系活力、叶绿素含量、MDA含量,但小麦幼苗的SOD活性、POD活性显著增加。综合来看,红小豆不同组织及根际土壤水浸提液对小麦幼苗的化感作用综合效应强弱顺序依次为叶>茎>土>根。
In this paper, seedlings of wheat (Triticum aestivum) were used as crop plants. Sand culture was used to study the effects of different concentrations (0, 10, 40 and 160 g / L) of roots, stems and leaves on rhizosphere soils Allelopathy of Extract on Wheat Seedlings. The results showed that the root water extract showed low concentrations and inhibited the high concentration of wheat seedlings, while the root length, lateral root number and dry weight of the roots of wheat seedlings all showed low concentration and high concentration inhibition. Rhizosphere soil, stems and leaves aqueous extracts of wheat seedling height, young leaf length has an inhibitory effect, and with increasing concentration inhibitory effect gradually strengthened; Rhizosphere soil water extract at low concentrations, enhanced The activities of superoxide dismutase (SOD) and peroxidase (POD) in wheat seedling decreased the content of chlorophyll and the content of malondialdehyde (MDA) in seedling leaves. , Reduced root activity, chlorophyll content and MDA content of wheat seedlings, but SOD activity and POD activity of wheat seedlings increased significantly. Taken together, the comprehensive effects of the allelopathic effects of aqueous extracts from different tissues and rhizosphere soils on wheat seedlings were leaf> stem> soil> root.