For experimental purposes , scientists originally assumed that photoperiodism worked through photosynthesis.

1、

Photosynethically Available Radiation ( PAR ) is an important energy sources of photosynthesis for the green plants.

光合有效辐射(PhotosyntheticallyAvailableRadiation, 简称 PAR ) 是植物进行光合作用的重要能量来源.

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2、

By means of photosynthesis, plants convert the radiant energy of the sun into chemical energy.

通过光合作用, 植物将太阳的辐射能转为化学能.

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3、

This process called photosynthesis sustains almost all life on Earth.

这个过程叫做光合作用,它使地球上几乎所有的生命得以维持.

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4、

Some of the carbon dioxide absorbed by plants during photosynthesis is radioactive.

植物在光合作用中吸收的一些二氧化碳具有放射性.

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5、

The high rate of nitrogen and phosphorus is unfavourable to the photosynthesis of the phytoplankton.

过高的氮磷比不利于浮游植物进行光合作用.

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6、

Eventually, photosynthesis arrived in the form ofcyanobacteria.

起初, 陆地上大多是岩石和冰,后来,随着植被的出现,才形成了今天的地球.

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7、

If it were not for photosynthesis, the world would starve to death.

要不是由于光合作用, 世人就要饿死.

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8、

An example for plastids are chloroplasts, in which photosynthesis occurs.

质体的一个例子是发生光合作用的叶绿体.

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9、

The second reason light is important to organisms is that it is essential for photosynthesis.

光对于生物很重要的第二个原因是它对于光合作用极其重要.

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10、

The leaf was allowed to photosynthesize in the presence of radiocarbon.

叶子被允许同放射性碳进行光合作用.

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11、

The plant can then reach the light faster and photosynthesize and synthesize more chlorophyll.

这种植物被置于光下后,可迅速的开始光合作用,合成大量叶绿素.

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12、

Leaf area is the best measure of the photosynthesizing capacity of the plant.

叶面积是测定植株光合能力的最好尺度.

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13、

Chloroplasts are the site of photosynthesis in plants and other photosynthesizing organisms.

叶绿体是植物和其它光合作用有机体发生光合作用的场所.

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14、

So the controlling factor of photosynthetic rate was non-stomatal limitation.

白玉兰光合速率控制因子为非气孔限制.

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15、

The photosynthetic unit then is a physiological unit of function defined by experiments with intact plants.

通过用整体植物作的试验,又把光合单位定义为生理学的功能单位.

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16、

Water stress promoted allocation of photosynthetic product to the seed.

因此,水分胁迫促进了光合产物向籽粒的调运.

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17、

In some plants photosynthetic products are stored in the form polyfructosans.

在有些植物中,光合作用产物是以多聚果糖的形式储藏.

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18、

The photosynthetic pigment in bacteria is bacteriochlorophyll.

细菌光合作用的色素是细菌叶绿素.

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19、

Scientists invented a mosquito-repellent device using mosquito's phototaxis.

利用蚊子的趋光性,专家发明了一种灭蚊器.

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20、

Water beetles can swim in water, fly in the air, and have strong phototaxis.

龙虱在水能游, 出水能飞, 并有很强的趋光性.

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