Lorenzini G, Farina R, Guidi L
Dipartimento di Coltivazione e Difesa delle Specie Legnose, Sezione Patologia Vegetale, Università degli Studi, 56124 Pisa, Italy.
Environ Pollut. 1990;68(1-2):1-14. doi: 10.1016/0269-7491(90)90010-a.
Vicia faba cv. Aguadulce was grown in fumigation chambers ventilated with filtered air or air containing sulphur dioxide (SO(2)) at controlled concentrations, and inoculated with the rust fungus Uromyces viciae-fabae. The influence of the pollutant was rated in terms of production of uredia and dehiscent urediospores. Exposures to SO(2) levels around 70-90 nl litre(-1) enhanced uredia density. Pre-inoculation fumigations at 70-86 nl litre(-1) increased uredia density, whilst post-inoculation fumigations stimulated urediospore production. Lower concentrations increased diffusion resistance of the host plant and slightly increased uredia density. Concentrations between 100 and 130 nl litre(-1) were somewhat inhibitory for the parasite, even in the absence of any visible damage symptoms on the host. Total sulphur accumulation in leaf tissue was reduced by the presence of the fungal infection. Growing under SO(2) pollution neither decreased germination ability nor modified morphological parameters of the urediospores. However, elongation of the germination tube of spores coming from filtered air was adversely affected by the pollutant.
将蚕豆品种阿瓜杜尔塞种植在通过过滤空气或含有可控浓度二氧化硫（SO₂）的空气通风的熏蒸室内，并接种锈菌蚕豆单胞锈菌。根据夏孢子堆和开裂夏孢子的产生情况对污染物的影响进行评级。暴露于约70 - 90 nl升⁻¹的SO₂水平会提高夏孢子堆密度。在70 - 86 nl升⁻¹进行接种前熏蒸会增加夏孢子堆密度，而接种后熏蒸会刺激夏孢子产生。较低浓度会增加寄主植物的扩散阻力并略微增加夏孢子堆密度。即使在寄主上没有任何可见损伤症状的情况下，100至130 nl升⁻¹之间的浓度对寄生物也有一定抑制作用。真菌感染会降低叶片组织中的总硫积累。在SO₂污染下生长既不会降低夏孢子的萌发能力，也不会改变夏孢子的形态参数。然而，来自过滤空气的孢子萌发管的伸长受到污染物的不利影响。
