葡萄叶面积测定方法的改进

对不同地点、不同年度、不同管理条件、不同品种、不同树龄的叶宽范围较宽(7.5～23.4cm)的葡萄叶片进行了叶宽与叶面积线性、乘幂、指数回归分析。结果表明,葡萄叶宽与叶面积的回归关系更符合乘幂趋势。据此建立了可较为普遍应用的利用葡萄叶宽速测葡萄叶面积的回归方程。如用线性方程,则需要根据不同叶宽范围建立方程。     

ETP对苹卷蛾(Adoxophyes orana)生殖的影响

应用ETP4—[2—(叔丁基丁酰氧基)丙氧基]丁苯甲酸乙酯(5μg/头)处理苹卷蛾(Adoxophyes orana)五龄第三天幼虫,使雌蛾脂肪体变态滞后,体内卵黄原蛋白含量降低,滤泡细胞组织结构异常,卵巢管内滤泡数量减少,部分卵泡退化,雌蛾产卵力下降97％,卵不能孵化。     

山胡椒叶子化学成分及其应用

报道了山胡椒叶子的化学成分,鉴定了叶子中的精油成分,主要为β-水芹烯(19.03％)、月桂烯(17.93％)、香树烯(17.11％),γ-杜松烯(10.17％)、别罗勒烯(9.17％)、杜松烯(3.90％)、(+)-δ-杜松烯(3.18％)等34个化合物;分析了叶子中脂肪酸的组分,有月桂酸(1.053％)、肉豆寇酸(2.074％)、棕榈酸(13.368％)、棕榈烯酸(1.679％)、硬脂酸(1.850％)、油酸(20.499％)、亚油酸(45.70％)、亚麻酸(11.17％);并测得叶子中水溶性聚糖组成,有鼠李糖(13.13％)、阿拉伯糖和木糖(共64.80％)、葡萄糖(20.75％)。另外,还对山胡椒叶子精油的药用和聚糖的应用作了试验。     

蔬菜叶片面积性状的相关性研究

蔬菜叶片实际叶面积与叶片本身的长×宽、长与宽之间有密切关系,叶片长与宽之间亦有密切关系。本文主要讨论了蔬菜叶片面积性状的相关性并得出结论:1)叶片长×宽、长、宽与实际叶面积都极相关,其中均以长×宽与实际叶面积之间的相关系数最大,长度和宽度何者与实际叶面积的相关系数较大因不同供试蔬菜而异。2)供试蔬菜叶片的长度和宽度之间也极相关,其相关程度亦因不同供试蔬菜而异。3)依据相关性建立了相应的线性回归方程。     

云南天然饮料物中的微量元素分析

用原子吸收光谱法测定了云南的茶叶、三七叶、茎及咖啡豆中的微量元素Ｚｎ，Ｃｕ，Ｃｏ，Ｍｎ，Ｆｅ，Ｃａ，Ｍｇ，Ｋ的含量；分光光度法测定Ｍｏ的含量，根据实验结果讨论与人体健康的关系．     

AC2 and AC4 proteins of <Emphasis Type="Italic">Tomato yellow leaf curl China virus</Emphasis> and <Emphasis Type="Italic">Tobacco curly shoot virus</Emphasis> mediate suppression of RNA silencing

Tomato yellow leaf curl China virus Y10 isolate (TYLCCNV-Y10) alone could systemically infect host plants such as Nicotiana benthamiana without symptoms. In contrast, Tobacco curly shoot virus Y35 isolate (TbCSV-Y35) alone induces leaf curl symptoms in N. benthamiana. When inoculated into transgenic N. benthamiana plants expressing GFP gene (line 16c), TYLCCNV-Y10 neither reverses the established GFP silencing nor blocks the onset of GFP silencing. In contrast, TbCSV-Y35 can partially reverse the established GFP silencing and block the onset of GFP silencing in new leaves. In the patch co-infiltration assays, the AC2 and AC4 proteins of TYLCCNV-Y10 and TbCSV-Y35 could suppress local GFP silencing and delay systemic GFP silencing, suggesting that they are suppressors of RNA silencing. Comparison of the accumulation levels of GFP mRNA in the co-infiltration patches showed that Y10 AC2 and Y35 AC2 proteins had similar efficiency for suppression of RNA silencing. However, Y35 AC4 protein functioned as a stronger suppressor of RNA silencing than Y10 AC4 protein. There-fore, the pathogenicity difference between TbCSV-Y35 and TYLCCNV-Y10 may be related to the functional difference in their AC4 proteins.     

Ellipticity of the Linearly Polarized He-Ne Laser Radiation Reflected by the Leaves of Plants

The phenomenon of elliptical polarization of the linearly polarized radiation reflected near the Brewster angle by the leaves of plants has been investigated. It has been shown that the appearance of ellipticity is associated with the complex structure of the cuticle.__________Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 72, No. 2, pp. 236–240, March–April, 2005.     

苜蓿叶蛋白脱色及色素的研究

本文讨论了苜蓿叶蛋白浓缩物（Ｌｅａｆｐｒｏｔｅｉｎｃｏｎｃｅｒｔｒａｔｅｓ）的分离、脱色的方法及苜蓿叶中色素的含量及部分性质的研究，从而确定了叶蛋白浓缩物及苜蓿叶中色素在食品工业和饲料工业中的用途。     

原子吸收法测定杜仲叶中无机元素含量

本文报道了利用原子吸收分光光度法对杜仲叶中无机元素含量的测定．结果表明，杜仲叶中富含人体必需的微量元素及宏量元素，有害无素Ｐｂ、Ｃｄ含量较低，同时测定了杜仲皮中无机元素含量．