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A STUDY OF CERTAIN SPECIES OF THE GENUS SCLEROTINIA 总被引:1,自引:0,他引:1
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本文报道了采自人参(Panax ginseng C. A.Mey (保留名nom. Coiiscry))的核盘菌属一新种——人参核盘菌(Sclerotinla.Ginseng Wang C. R.,C. F. Chen et J. Chen)。该种在形态学以及可溶性蛋白、果胶(甲)酯酶和多聚半乳糖醛酸酶谱带等方面,均不同于已知种核盘菌(S. sclerotiorum (Lib.)de Bary),小核盘菌(S. minor Jagger)车轴草核盘菌(S.Trifoliorum Erikss.)和细辛核盘菌(S.Asari Wu et C.R. Wang)。模式标本(800719)保存于沈阳农业大学植物免疫研究室。 相似文献
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本文报道寄生于金缕梅科(Hamamelidaceae)山枫香(Liquidambar formosana Hance)上小钩丝壳属的一个新变种枫香小钩丝壳贵阳变种[Uncinuliella liquidambaris(Zheng &Chen)Zheng,Chen & Z.X.Chen var.guiyangensis Wu & Wu]。 相似文献
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全蚀病菌在玉米上的新变种 总被引:1,自引:0,他引:1
本文报道了玉米全蚀病菌禾顶囊壳菌(Gaeumannomyces graminis)的新变种——玉米变种[Gaeumannomyces graminis(Sacc.)Arx et Olivler var.maydis Yao Wang et Zhu var.nov.]。该变种在形态学、致病性、生物学及可溶性蛋白电泳谱带等方面,均不同于禾顶囊壳菌小麦变种[G.graminis var,tritici J.Walker)、水稻变种(G.graminis var.graminis Trans.)和燕麦变种[G.graminis var.avenae(Turner)Dennis]。模式标本保存在沈阳农业大学真菌标本室。 相似文献
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Bean fields are often attacked by Aphis fabae very heavily along the edges: and on a field at Rothamsted in 1948 the sides facing the wind during the primary migration had more colonies than those in the lee of the crop (Johnson, 1950). Additional observations on the distribution of colonies were made on six bean fields at Sutton Bonington in 1950–2.
At Rothamsted in 1948 it was assumed that the more numerous colonies on the windward sides of the field followed a heavier deposition of primary migrants there, though the migrants themselves were not observed on the crop. In 1950–2 the locations of primary migrants, as well as of colonies, were recorded in three out of the six fields observed. 相似文献
At Rothamsted in 1948 it was assumed that the more numerous colonies on the windward sides of the field followed a heavier deposition of primary migrants there, though the migrants themselves were not observed on the crop. In 1950–2 the locations of primary migrants, as well as of colonies, were recorded in three out of the six fields observed. 相似文献
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D. J. STEWART 《Journal of applied microbiology》1960,23(1):7-9
SUMMARY: A modification of the dulcitol-lactose-iron medium of Taylor & Silliker (1958) is proposed. It contains sucrose as well as lactose to aid in detecting slow lactose fermenters and gives simultaneously tests for urea hydrolysis and H2 S production. The latter reaction is kept apart from the carbohydrate fermentations and the urea hydrolysis. The surface growth can be used in a test for the deamination of phenylalanine to phenylpyruvic acid. 相似文献
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THE ANALYSIS AND RECONSTRUCTION OF DIURNAL FLIGHT CURVES IN ALIENICOLAE OF APHIS FABAE SCOP. 总被引:1,自引:0,他引:1
Experiments, in which alate aphids were marked immediately after eclosion from the last nymphal instar and observed until they took flight, gave information which, together with the measured rate of moulting and a continuous record of temperature, has been used to construct theoretical daily curves for numbers flying from a bean crop. These curves have been matched against the observed curves for the same days.
The differences between curves so constructed for a period of 17 days and the observed curves for the same period are of the same order and kind as the differences between two measured curves in different sites at the same time.
The different types of daily flight curve can thus be accounted for in terms of the rate of production of alatae by moulting, the effect of temperature on the teneral ('drying out') period and the effect of low light intensity and temperature on take-off behaviour. 相似文献
The differences between curves so constructed for a period of 17 days and the observed curves for the same period are of the same order and kind as the differences between two measured curves in different sites at the same time.
The different types of daily flight curve can thus be accounted for in terms of the rate of production of alatae by moulting, the effect of temperature on the teneral ('drying out') period and the effect of low light intensity and temperature on take-off behaviour. 相似文献
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A LOCAL-LESION TECHNIQUE FOR MEASURING THE INFECTIVITY OF CONIDIA OF BOTRYTIS FABAE SARDIÑA 总被引:2,自引:0,他引:2
Discrete lesions developed when conidial suspensions of Botrytis fabae Sardiña were rubbed with the forefinger on leaves of broad bean plants ( Vicia faba L.) subsequently kept in a water-saturated atmosphere. The numbers of lesions which developed were directly proportional to the concentration of inoculum. At equal concentrations, conidia from young cultures produced more lesions than conidia from old cultures.
Variation in lesion numbers between plants within a pot always considerably exceeded the variation between opposite half-leaflets of a leaf, as did variation between pots and between leaves of old, but not of young plants.
As the standard error of the number of lesions developing per half-leaflet ( x ) increases as the mean increases, the values of x need to be transformed before being statistically analysed. A suitable transformation is
z = log10 1/2{x + c +√(x2 + 2cx)}, where c = 20. 相似文献
Variation in lesion numbers between plants within a pot always considerably exceeded the variation between opposite half-leaflets of a leaf, as did variation between pots and between leaves of old, but not of young plants.
As the standard error of the number of lesions developing per half-leaflet ( x ) increases as the mean increases, the values of x need to be transformed before being statistically analysed. A suitable transformation is
z = log
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观察和测定了核盘菌(Sclerotiniasclerotiorum(Lib.)deBary)弱毒株Ep-1PN单孢分离物的生长、菌落扩展和菌落形态等培养性状。结果发现:来自7个子囊盘的1574个单孢分离物中有1560个分离物的培养性状与正常菌株的没有显著差异,与亲本相似的分离物只有6个,其它8个分离物介于弱毒株Ep-1PN与正常菌株之间。弱毒株Ep-1PN培养性状的有性遗传不遵循孟德尔核遗传规律。 相似文献
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水稻品种“740098”抗褐飞虱的机制 总被引:2,自引:0,他引:2
“740098”是我国74年从国际水稻研究所引进的品系之一(原名:IR2061—464—2—4—5),在湖南省作晚稻栽培,丰产性较好。特别是在大田种植中,当邻近丘的其他品种遭到褐飞虱的严重为害,甚至全部死秆倒伏时,“740098”却保持不受害。在整个晚稻生长期,它完全不需要防治褐飞虱。所以,这个品种在湖南农村深受欢迎,推广面积逐年增大。为了明确“740098”抗褐飞虱的机制,我们在1977-1978年进行了初步研究。 相似文献
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