系

Composition of both spermatophyte and pteridophyte flora of a relict Alsophila spinulosa community in Wutongqiao Nature Reserve of Leshan region was discussed. It shows the proportion of Tropic and Cathaysia elements in both spermatophyte flora and pteridophyte flora was almost 2/3 of the total at the genus level, and even more at the family level. There was a distinct ancient endemism phenomenon in spermatophyte flora, owning to being 8 relict and remnant endemism genera in the total of 9. Furthermore, the proportion of Tropic and Cathaysia elements both at family and genus level in the pteridophyte flora were much greater.

选以乐山五通桥桫椤自然保护区-桫椤群落的种子植物区系与蕨类植物区系组成为研究对象，发现种子植物区系在属的水平上热带成分与古华夏成分占到近2/3，在科的水平上则更高；种子植物区系中有9个中国特有属，其中8个为残遗或原始类型的古特有属，表现出典型的古特有现象；而在蕨类植物区系中热带成分和华夏成分所占比重更大。

There are many reports about analysis of isozymes between male sterile lines and their maintainers, but different crops or varieties in same crop expressed dissimilarly. There were few reports about comparison study of isozymes between male sterile line in cabbage and its maintainer at present. Most reports about analysis of isozymes between male sterile lines and their mainainter were limited 1-2 isozymes.

有关细胞质雄性不育系及其保持系花药同工酶分析的报道已有相当多，但不同作物表现不一样，同一作物不同品种表现也有差异，而且目前有关甘蓝雄性不育系和保持系同工酶比较研究的报道极少，有关细胞质雄性不育系与保持系的同工酶分析的报道多限于1—2种酶。

In Japonica heterosis utilization, the purity of hybrid seeds was sometimes low due to the self-fertility and/or unstable sterility of some BT type Japonica cytoplasmic male sterile lines. For the WA type Japonica CMS lines, their sterility is much stable, but there is also some difficult to take use of them because their flowering habit is bad and it is very difficult to restore their fertility. The HL type CMS lines were identified to have the same flowering habit and outcrossing rate with the BT type CMS lines in Japonica hybrid rice. Moreover, the sterility of HL type CMS lines was more stable than that of BT type, and their restorable characteristics was better than that of WA type.

部分BT型粳稻不育系存在自交结实现象，不育性的稳定性较差，影响杂交种的纯度；WA型粳稻不育系虽然不育性稳定，但开花习性差，育性最难恢复，应用难度较大；HL粳稻不育系开花习性及异交结实率与BT型粳稻不育系无显著差异，育性稳定性明显好于BT型粳稻不育系，可恢复性明显好于WA型粳稻不育系，较好地协调了育性稳定性、开花习性和可恢复性几方面的矛盾。

Through morphological analysis between male sterile plant and male fertile plant in the alabastrum period as well as in flowering period, one morphological mark was found that the alabastrum of male sterile plant was in cone shape; the alabastrum of male fertile plant was cylindraceous. The male sterile alabastrum and male fertile alabastrum were significantly different. The petal of male sterile is filiform but not lingulate and tubular , the normal one was just the opposite.

通过在蕾期和盛花期对不育系和可育系的形态性状进行分析，找到了一个与育性相关的形态标记，即不育系的花蕾呈圆锥状，而可育系花蕾呈圆柱状，二者形态差异极显著；花开放后，不育系的花瓣丝状化，没有舌状花和管状花之分，而正常可育系花序外围是舌状花，内部是管状花。

The angiospermae flora of Dongjiang valley is analyzed, including the geographical distribution pattern, the same and difference between the flora of Dongjiang and other floras, then the origination of flora of Dognjiang and the boundaties are discussed, finally the vegetative types of it were also described.

本文为广东省东江流域的植物区系分析，全文分析了东江流域植物区系成分的地理分布区类型，阐述了该区系与不同地区植物区系的异同与联系，探讨了东江流域植物区系的起源和区系的地理归属问题，并对东江流域的植被类型作了概述。

The content of GA exhibited on imbalance in different tissue of seedling. The content of IAA, GA and ZR of male sterile lines were lower than maintainer lines to some degree, especially in the stage of archesporial and meiosis. IAA, GA and ZR are the important plant hormone which regulates lots of activity of plant. Their deficient must interfere on the development of anther and result in abortion.

在花期叶片激素含量在保持系和不育系之间变化较大，蕾期不育系的IAA、GA和ZR含量出现不同程度的亏缺，尤其是从小蕾期到大蕾期阶段，ogura不育系、改良萝卜不育系的IAA、GA和ZR含量都极显著低于保持系IAA、GA和ZR是植物体内重要的信号物质，可调节植物的多种生命活动，其亏缺影响花粉的正常发育，从而引起败育。

Paper electrophoresis showed that the Onobrychis viciaefolia and Medicago sativa cell line transformed with A〓 synthesized agropine and mannopine, and Onobrychis viciaefolia cell line transformed with LBA9402 Bin19 only synthesized agropine.

红豆草转化系获得再生植株。LBA9402 Bin19转化系可以抗100mg／l卡那霉素。苜蓿A4转化系未能得到再生植株。纸电泳分析表明红豆草A4转化系和苜蓿A〓转化系可以合成农杆碱和甘露碱，而红豆草LBA9402Bin19转化系只能合成农杆碱。

The experiment with 4 cytoplasmic male sterile and their B-lines to examine characteristics of small vascular bundle, volume, weight, water potential of lodicules between CMS lines and B-lines and among CMS lines by using GLM and multiple comparisons, and correlation analysis was also conducted on the SVB, volume, weight, water potential of lodicules and percentage of glume-gaping grains and percentage of heavily glume-gaping grains on CMS lines.

以具有不同裂颖特性的细胞质雄性不育系福伊A、三香A、丰源A、T98A及其相应保持系为材料，对不育系间以及保持系与不育系间浆片的小维管束性状值、体积、重量、水势进行方差分析和多重比较，并对不育系浆片的小维管束性状值、体积、重量、水势与其种子裂颖率和裂颖度进行相关分析。

By each gear wheel system is a fixed geometric axis is divided into a fixed axis and the epicyclic gear train, epicyclic gear train again planetary gear train and differential gear train.

按轮系中各齿轮的几何轴线是否固定分为定轴轮系和周转轮系，周转轮系又有行星轮系和差动轮系。

Therefore, in this paper a new mechanics method is studied, i. e. a group of equations were set up and solved by the equilibrium conditions of the couple system. The transmission ratio and the meshing efficiency calculation formula were derived by this method. According to the law of conservation of energy. Hence then the above profound problems are analyzed and solved in a simple way. epicyclic gear train ; couple system ; transmission ratio ; meshing efficiency

故根据平面力偶系平衡条件可以很方便地推导出轮系传动比和啮合效率公式，与其它方法[卜3]不同之处还在于，本文根据能量守恒定律，不需分析啮合功率的流向，便可解决啮合效率的计算问题。1理论基础1.1基本周转轮系的力矩关系式图1为常用的2K—H型基本周转轮系，当轮系匀速转动工作时，根据受力平衡条件，作用在▲图l 2K_H基本轮系三个基本构件上的力偶矩应满足以下关系式[1]：兰=簇=撬㈤一1一涅稍一1一涅稍

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。