亚有限大豆源库关系的研究

通过剪去不同部位叶片的研究表明,亚有限大豆植株冠层中存在着上部与中部、底部与分枝两个源库单位。不同层次的叶源变化,各种生理补偿作用主要发生在同一源库单位上。源库平衡的破坏,可通过内部调节在某一水平上建立新的平衡。产量库对光合源的生产有强烈的反馈调节作用,源库比既影响着光合强度又左右光合产物的运输和分配。

THE RELATIONSHIP OF SOURCE AND SINK IN SEMI-DETERMINATE SOYBEAN

The relationship of source and sink of different plant sections (upper, middle, bottom and branches) was studied by using the methods of defoliation. The results indicated that there existed two main source - sink units in semi - determinate soybean during reproductive stage, one was upper and middle sections of main stem, the other was section bottom of main stem and branches. When removing leaves of different plant section, we found that all sorts of physiological compensation mainly appeared within the source-sink unit mentioned above. Moreover, the intensity of compensation changed from low to high with plant development. It seemed that when the Iorigi-nal balance of source-sink relation was brokem, mew balance shoud be established by its internal adjustment. The ratio of source anf sink influenced not only photosynthetic rate but also transportion and partition of the photosynthate.