现在一般认为，光合单位的大小是按其功能来计算的。
Is now generally believed that the size of photosynthetic units calculated according to their function.
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。
The photosynthetic unit then is a physiological unit of function defined by experiments with intact plants.
近年来的一系列研究都指出约250—300个叶绿素分子和一个作用中心组成了一个光合作用单位。
Recent studies have suggested that a "photosynthetic unit" of about 250-300 chlorophyll molecules may be associated with one "active center".
提高单位面积的产量是水稻育种目标永恒的主题，提高光合作用效率又是提高产量的关键因素。
Increasing yield level per unit area is forever theme for rice breeding aim, and advancing photosynthesis efficiency is one of key factors for improving grain yield.
粒叶比是衡量单位叶面积光合生产力的综合性状。
The grain-leaf ratio is a comprehensive trait estimating photosynthetic productivity of per unit leaf area.
小麦是我国重要的粮食作物之一，揭示其光合作用机理对于提高光合效率，增加单位面积产量具有极其重要的意义。
The wheat is one of the important grain crops in China, It is important to reveal the mechanism of photosynthetic to improve the photosynthetic efficiency and increase yield.
小麦是我国重要的粮食作物之一，揭示其光合作用机理对于提高光合效率，增加单位面积产量具有极其重要的意义。
The wheat is one of the important grain crops in China, It is important to reveal the mechanism of photosynthetic to improve the photosynthetic efficiency and increase yield.
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