CAJ | 학술논문

为明确籽粒内激素含量变化动态与源库矛盾的关系，通过梯度减除稻穗上部枝梗的方法，改变不同穗位籽粒的源库关系，进而研究了不同粒位籽粒的 IAA、ABA、ZT、GA3的动态变化及其与胚乳细胞增殖、粒质量形成之间的关系。结果表明，籽粒中激素以 IAA、ABA 含量较大，而 ZT、GA3含量较小；自然状态下，粒位间 IAA 含量总的变化趋势是灌浆前期下位籽粒大于上位籽粒，灌浆后期则相反；其他激素总体表现为灌浆前期上位籽粒大于下位籽粒，灌浆后期则相反；粒位间激素含量差异存在波动。源库比例改变后，各粒位激素含量总体提高、弱势粒的变化幅度较大，粒位间、激素间存在不同的变化特征；相同粒位激素含量变化幅度并不随减库程度的增加而增加。灌浆中期的激素含量对胚乳细胞增殖有延后效应，灌浆前期及后期的激素含量对籽粒干质量增加既存在即时效应，又存在延后效应。
위명학자립내격소함량변화동태여원고모순적관계，통과제도감제도수상부지경적방법，개변불동수위자립적원고관계，진이연구료불동립위자립적 IAA、ABA、ZT、GA3적동태변화급기여배유세포증식、립질량형성지간적관계。결과표명，자립중격소이 IAA、ABA 함량교대，이 ZT、GA3함량교소；자연상태하，립위간 IAA 함량총적변화추세시관장전기하위자립대우상위자립，관장후기칙상반；기타격소총체표현위관장전기상위자립대우하위자립，관장후기칙상반；립위간격소함량차이존재파동。원고비례개변후，각립위격소함량총체제고、약세립적변화폭도교대，립위간、격소간존재불동적변화특정；상동립위격소함량변화폭도병불수감고정도적증가이증가。관장중기적격소함량대배유세포증식유연후효응，관장전기급후기적격소함량대자립간질량증가기존재즉시효응，우존재연후효응。
In this study,a gradient reduction sink method was used to control the source /sink ratio to illustrate the relationship between phytohomone levels and source /sink ratio in rice grains.We investigated IAA,ABA,ZT and GA3 levels for the grains from different position of the panicle and studied the relationship of phytohormone dy -namic changes with the endosperm cell increasing rates as well as with the grain development .Our results showed that the contents of ABA and IAA were higher ,whilst the contents of ZT and GA 3 were lower in grains.Before grain filling stage,the IAA content of lower grains was higher than that of upper grains ,whilst it was contrary after grain filling stage.For the other phytohormones,the contents of upper grains were higher than that of lower grains ,and it was also contrary after grain filling stage .There was fluctuation in the differences among phytohormones of different position grains.After the source /sink ratio was changed,the overall content of phytohormone increased ,and the weak sink grains showed a wider changing rang .Different position grains and different phytohormones showed differ -ent changing characters.The changing range of phytohormone for the different treat and same position grains did not add to the degree of grain treatment.The phytohormone levels showed delayed effects for the endosperm cell increas -ing during grain filling stage.Whilst the phytohormone levels showed both delay and instant effects for grain weight increase before and after grain filling stage .