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首页> 外文期刊>日本作物學會紀事 >Studies on the Leaf Orientation-Adjusting Movement in Soybean Plants : I. The leaf orientation-adjusting movement and light intensity on leaf surface
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Studies on the Leaf Orientation-Adjusting Movement in Soybean Plants : I. The leaf orientation-adjusting movement and light intensity on leaf surface

机译：大豆植物中叶定向调整运动的研究：I。叶面上的叶片定向调节运动和光强度

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It is well known for long that a soybean leaf slters its inclination in response to the intensity or derction of light on the leaf surface. This study has for its object to find quantitatively the actual state of leaf orientation-adjusting movement and to clarify the relationship of the adjusting movement with the high-yielding ability of soybeans, thus attempting to apply the findings to the high-yielding soylbean variety breeding project. In the present report, the author makes report on the results of the study which was conducted in 1965 to obtain the general information on the leaf orientation-adjusting movement in soybean plants and the changes in its effect on the light intensity on the leaf surface. 1. In early September, 1965, the author made the measurement on the entire leaves of one hill of the soybean plant comunity of Azeminori variety which was planted on May 19 and grown on a one-piece-per-hill basis, 60 cm between rows and 20 cm between hills; i. e., the azimuth of leaves and the angle of leaf inclination were measured under different climatic conditions, and the ligh intensity on the leaf surface was measured as well. In the present report, the author should like to make the report on each of the typical cases observed under both of cloudy and fine weather. 2. About the direction of leaf, the leaves having an angle of 45°with the direction of row were predominant in number (fig. 2), but abut the angle of leaf inclination, a marked difference was observed according to the climatic conditions (fig. 3), i. e., under the cloudy weather, the leaf surface which inclined upward at the angle of 0°to 30°showed an increase, while under the fine weather, horizontal leaves decreased and such leaves which inclined downward at the angle of more than 15°increased. A marked difference was observed in the adjusting movement between the two coditions. 3. Regarding the distributtion percentage of leaf number and leaf area according to the ligh intensity on the leaf surface, the distribution percentag was even to a fairly great extent under the cloudy weather, while under the fine weather, two types quite different in the distribution percentage were observed, i.e., one was of unsaturated type with low light intensity on the leaf surface, and anothor was of saturated type with high light intensity on the leaf surface (fig. 4). This fact seems to endose the light saturation theory concerning the photosynthesis of soybean plant oommunity that "even if the light becomes stronger, the light intensity on the surface of the leaves of light insaturated type shows no increase, causing an increase only in the light intensity on the surface of the leaves already saturated with light. As a result, the light becomes unavailable even though it becomes stronger". However, when applied a different measuring method, it would give rise to a different relationship between the increase in the external light and the increase in the light intensity on the leaf surface (as shown in fig. 4, the distribution percentage of leaf number and leaf area differs under the fine weather). Moreover, there is no gainsaying that, with the changes in the direction of the sunlight, the light intensity on the surface of the leaves insaturated with light in the lower layer of soybean plant community will show an increase to a fairly great extent owing to the sunbeams that may come through. Accordingly, it is considered that the light saturation phenomenon in the photosynthesis of soybean plant community of fairly luxuriant growth can be observed only in the specific cases. For this reason, the established light saturation theory concerning the photosynthesis of soybean plant community is required to be re-examined. 4. Respecting the relationship of the direction and inclination of leaves with light intensity on the leaf surface, no specific trend was observed under the cloudy weather. [the rest omitted]
机译：众所周知，大豆叶响应于叶面上的光的强度或解散而倾斜倾斜。本研究具有其目的，以定量地寻找叶定向调节运动的实际状态，并阐明调节运动与大豆的高屈服能力的关系，从而试图将研究结果应用于高产大豆品种育种项目。在本报告中，作者提出了关于1965年进行的研究结果的报告，以获得大豆植物中叶定向调节运动的一般信息，以及其对叶面光强度的影响变化。 1. 1965年9月初，作者在5月19日种植的大豆植物繁多的一山众多山坡上进行了测量，并在每山一体的基础上生长60厘米丘陵之间的行和20厘米;一世。即，在不同气候条件下测量叶片的方位角和叶片倾角的角度，并且也测量叶片表面上的光强度。在本报告中，提交人希望在多云和良好的天气下观察到每个典型案件的报告。 2.关于叶的方向，在数量（图2）中具有行的方向具有45°的角度的叶子（图2），但是叶倾角的角度，根据气候条件观察标记的差异（图3），我。即，在多云的天气下，以0°至30°的角度向上倾斜的叶片表面显示出增加，而在细微的天气下，水平叶片下降，并且这种叶子以超过15°的角度倾斜增加。在两种编码之间的调节运动中观察到显着差异。 3.关于叶片数和叶面积的分配百分比根据叶片表面的轻度强度，分配百分比甚至在多云的天气下的一个相当大的程度，而在晴朗的天气下，分布中的两种类型完全不同观察到百分比，即一个是叶面上具有低光强度的不饱和型，仙龙是叶片表面上具有高光强度的饱和型（图4）。这一事实似乎封面了关于大豆植物不足的光合作用的光饱和理论，即“即使光变得更强，光不合型叶片表面上的光强度也不增加，导致仅在光强度增加在已经用光饱和的叶子的表面上。结果，即使它变得更强烈，光也不会变得不可用“。然而，当施加不同的测量方法时，它会产生不同关系之间的外部光的增加与叶片表面上的光强度的增加（如图4所示，叶数的分布百分比和叶子区域在晴朗的天气下不同）。此外，随着阳光方向的变化，由于阳光方向的变化，叶片表面上的光强度与大豆植物群落下层的光不稳定将显示出相当大的程度可能会通过的阳光。因此，考虑到在特定情况下，可以仅观察到大豆植物群落的光合作用的光饱和现象。因此，需要重新检查关于大豆植物群落光合作用的已建立的光饱和理论。 4.尊重叶片表面光强度的叶子的方向和倾斜关系，在多云的天气下观察到特定趋势。 [省略了]

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