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冬小麦生长期对矮腥侵染的作用

植物检疫 1980年第2期 27-29+32页

作者： J.A.hoffmann L.h.purdy

矮腥在病土田里不时发生是受许多物理的和生物的因子影响的。经过一个冬季的接种试验,显示小麦植株在苗期以后一个很长时期是感病的。从雪及各种人为的冬季遮盖物对诱发矮腥发病的影响,显出侵染可能发生在冬季。purdy等证明侵染确在冬季发

关键词：播种日期贝尔植株发育侵染卡力播种深度覆土深度小麦品种浅播播种

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矮腥在一年当中的什么时候侵染冬小麦

植物检疫 1980年第2期 24-26页

作者： L.h.purdy J.A.hoffmann J.p.Meiners V.r.Stewart

矮腥菌和普腥菌的生物学特性有好几方面不同。矮腥侵染几乎都是以土壤带菌为侵染原的,而普腥侵染可以从土壤里或带在种子上的孢子起始的。矮腥孢子在商品麦田的土壤里,不种麦子也至少可存活7年,而完整病颗里的孢子,在试验小区的土壤里... 详细信息

矮腥菌和普腥菌的生物学特性有好几方面不同。矮腥侵染几乎都是以土壤带菌为侵染原的,而普腥侵染可以从土壤里或带在种子上的孢子起始的。矮腥孢子在商品麦田的土壤里,不种麦子也至少可存活7年,而完整病颗里的孢子,在试验小区的土壤里可以保

关键词：冬小麦冬麦侵染小麦植株试验小区普尔曼小麦品种卡力什么时候

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小麦矮腥黑穗病

植物检疫 1980年第2期 4-15页

作者： L.h.purdy E.L.Kendrick J.A.hoffmann C.S.holton

1935年Young氏提请注意,在蒙大拿州小麦腥黑粉病Tilletia tritici的一个“新变种”,从此澄清了长期来对小麦腥黑粉病(一个典型的古代植物病害)模糊不清的概念。以后这个所谓“新变种”被证明与新近认识到的矮腥黑粉病有关,而被升为种,... 详细信息

1935年Young氏提请注意,在蒙大拿州小麦腥黑粉病Tilletia tritici的一个“新变种”,从此澄清了长期来对小麦腥黑粉病(一个典型的古代植物病害)模糊不清的概念。以后这个所谓“新变种”被证明与新近认识到的矮腥黑粉病有关,而被升为种,用二名法写作Tilletia brevifaciens ***.根据命名法优先权规则此名最后改

关键词：黑粉病小种抗病品种黑穗病抗性品种小麦品种杂交品种杂交种先菌丝沙质土壤六氯苯六氯代苯侵染腥黑粉菌

帕金森病患者左旋多巴动力学的年龄相关性差异:与运动并发症的联系

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世界核心医学期刊文摘（神经病学分册） 2006年第9期2卷 41-42页

作者： Sossi V. De La Fuente-Fernández r. Schulzer M. 张慧 Pacific Parkinson's research Centre Purdy Pavilion 2221 Wesbrook Mall Vancouver BC V6T 2B5 Canada Dr.

Treatment-related motor complications in Parkinson’s disease have been previously linked to disease-induced pre-synaptic alterations: dopaminergic denervation and changes in dopamine (DA) release patterns. The occurrence of such complications is also known to be partly dependent on the age of disease onset, occurring more frequently in patients with disease onset at a younger age. Using positron emission tomography (PET) and 4-h-long 18F-fluorodopa (FD) scans we have investigated in vivo an age dependence of disease-induced changes in DA turnover as a possible contributing factor to the agerelated differences in treatment-related motor complications. We evaluated the relative changes in DA turnover (measured by its direct inverse, effective DA distribution volume -EDV) and DA synthesis and vesicular storage capacity (quantified by the plasma input uptake rate constant Ki) in Parkinson’s disease patients as a function of age (n = 27, age range 38-79 years). After correcting for disease severity, a significant negative correlation was found between age and magnitude of disease-induced decrease in EDV and in Ki in the putamen (P respectively). however, the difference between the disease-induced decrease in EDV and that in Ki also exhibited an age dependence (P relatively higher disease-induced increase in DA turnover (inverse of EDV) compared with the decrease in DA synthesis and storage rate in patients of younger age compared with older patients. This finding implies that DA turnover in younger-onset patients undergoes a relatively greater alteration and thus likely contributes to a greater imbalance between DA synthesis, storage and release, which could lead to larger swings in synaptic DA levels. It has indeed been suggested on theoretical grounds that such imbalance may contribute to the greater propensity for motor fluctuations. These results provide one possible explanation for the age-dependent occurrence of complicatio

关键词：年龄相关性运动并发症左旋多巴帕金森病患动力学正电子发射断层扫描 DA合成

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