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- W2383234589 abstract "Panicle N fertilizer, which is nitrogen fertilizer applied at panicle development stage, has great influence on the deve- lopment of rice panicle. Studies have revealed that the beneficial response of nitrogen fertilizer on spikelet development is associ-ated with the increase of spikelets number per panicle. However, little is known concerning the effect of panicle N fertilizer on endogenous hormones in rice young panicle. In the present study, two japonica rice cultivars (Wuyujing 3 and 2401) were used, and two panicle N fertilizer treatments, 120 kg N ha-1 as high nitrogen (HN) and 0 kg N ha-1 as low nitrogen (LN), were con-ducted to investigate the relationship between spikelets number and hormonal changes during rice panicle differentiation. The results showed that zeatin + zeatin riboside (ZRs), isopen-tenyl adenine (iPAs), and indole-3-acetic acid (IAA) concentrations were the highest at spikelet differentiation stage, sharply declined and remained almost static till heading, and recovered slightly after heading. Panicle N fertilizer treatment resulted in higher concentrations of ZRs and iPAs, especially at the spikelet differen-tiation stage. Whereas, IAA displayed lower concentration in HN as compared to LN. Moreover, there were higher ratios of ZRs/IAA and iPAs/IAA for HN as compared to LN during the panicle differentiation stage. The difference between them was the maximum at the spikelet differentiation stage and then declined to the minimum before heading, while there was no significant difference between two cultivars. The results suggested that the effect of panicle N fertilizer on spikelet differentiation and num-bers per panicle could be associated with the changes of endogenous hormones such as ZRs, iPAs, and IAA, either in their con-centrations or in their ratios." @default.
- W2383234589 created "2016-06-24" @default.
- W2383234589 creator A5044835611 @default.
- W2383234589 date "2008-01-01" @default.
- W2383234589 modified "2023-09-25" @default.
- W2383234589 title "Effect of Panicle Nitrogen Fertilizer on Concentrations of Cytokinin and Auxin in Young Panicles of Japonica Rice and Its Relation with Spikelet Development" @default.
- W2383234589 hasPublicationYear "2008" @default.
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