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- W2085288511 abstract "The role of gibberellin (GA) in leaf elongation has long been known, however, its involvement in whole shoot growth and biomass allocation is much less clear. We studied the effects of exogenously supplied GA 3 and paclobutrazol, an inhibitor of GA biosynthesis, on these processes in Aegilops caudata and Aegilops tauschii , species with contrasting leaf growth characteristics. In both species, addition of GA 3 increased leaf elongation rate (LER) through its promoting effect on both cell size and cell number, while paclobutrazol decreased it. Similarly, GA 3 increased biomass allocation to the leaves, mainly leaf sheaths, at the cost of allocation to the roots, whereas paclobutrazol had the opposite effect in both species. Despite the increase in LER and biomass allocation to the shoot upon GA 3 application, the relative growth rate (RGR) remained constant. Specific leaf area (SLA) was only temporarily affected by GA 3 addition. Our results show that the inherent differences in LER and biomass allocation between the slow‐elongating A. caudata and the fast‐elongating A. tauschii are considerably reduced by the exogenous supply of GA 3 to the slow‐elongating species, or paclobutrazol to the fast‐elongating one. This suggests a role for gibberellins in explaining inherent differences in leaf area expansion and biomass allocation between the two species in this study." @default.
- W2085288511 created "2016-06-24" @default.
- W2085288511 creator A5005256103 @default.
- W2085288511 creator A5016389221 @default.
- W2085288511 date "2004-08-10" @default.
- W2085288511 modified "2023-10-15" @default.
- W2085288511 title "Effects of applied gibberellic acid and paclobutrazol on leaf expansion and biomass allocation in two Aegilops species with contrasting leaf elongation rates" @default.
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- W2085288511 doi "https://doi.org/10.1111/j.1399-3054.2004.00383.x" @default.
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