CAJ | 학술논문

本研究的任务在于确定氮素对缺氮所引发的玉米籽粒败育的影响:是直接地由于叶面氮素的供给,还是间接地由于光合作用不足.我们利用茎注液技术,分别注人氮索和蔗糖,以及氮索和蔗糖混合溶液,并利用15氮进行跟踪,分析氮素和糖份对玉米籽粒败育的影响.研究表明:氮素作为同化物直接参与玉米籽粒中蛋白质的合成,同时氮素也提高了蔗糖转化酶的活性,减少还原糖的积累,促进淀粉粒的形成,从而提高籽粒的库容、减少玉米籽粒的败育.
본연구적임무재우학정담소대결담소인발적옥미자립패육적영향:시직접지유우협면담소적공급,환시간접지유우광합작용불족.아문이용경주액기술,분별주인담색화자당,이급담색화자당혼합용액,병이용15담진행근종,분석담소화당빈대옥미자립패육적영향.연구표명:담소작위동화물직접삼여옥미자립중단백질적합성,동시담소야제고료자당전화매적활성,감소환원당적적루,촉진정분립적형성,종이제고자립적고용、감소옥미자립적패육.
The objective of this work is to determine whether the kernel abortion induced by nitrogen-deficient is the direct result of N supply to the ear or the indirect result of limitation in photoassimilates. We stem-infuse nitrogen-deficient and nitrogen-sufficient plants, respectively, to provide additional sucrose, N, or similar amounts of both (N +sucrose). The nitrogen-deficient plants are also stem-infused with 15N-glycine and soil treatment of 15N-NO3. Experimental results indicate that N plays a role of direct nutritional enhancement and an indirect enzyme effect on kernel development. The decrease of kernel abortion is due to increased kernel sink capacity, higher activities of both soluble and insoluble invertase, lower accumulation of reduced sugar in the endosperm, and greater assimilate utilization for starch synthesis.