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- W2155296502 abstract "The Unifoliata ( Uni ) gene plays a major role in development of the compound leaf in pea, but its regulation is unknown. In this study, we examined the effects of plant hormones on the expression of Uni, PsPK2 (the gene for a pea homolog of Arabidopsis PID , a regulator of PIN1 targeting), PsPIN1 (the major gene for a putative auxin efflux carrier) and LE (a gibberellin biosynthesis gene, GA3ox ), and also examined mutual hormonal regulation of these genes, in pea shoot tips, including a number of mutants. The Uni promoter possessed putative auxin and gibberellin response elements. The PsPIN1 mRNA levels were increased in afila , which replaces leaflets with branched tendrils; and reduced in tendrilless , which replaces tendrils with leaflets, compared with the wild type (WT). In contrast, mRNA levels of LE were increased in uni and tendrilless and decreased in afila compared with the WT. Uni, PsPK2 and PsPIN1 are positively regulated by gibberellin and auxin, and were induced to higher levels by simultaneous application of auxin and gibberellin. Auxin induction of Uni, PsPK2 and PsPIN1 did not require de novo protein synthesis. LE was positively regulated by auxin and cytokinin. In conclusion, these results support the hypothesis that auxin and gibberellin positively regulate Uni , which controls pea compound leaf development. Also, Uni, PsPIN1, PsPK2 and LE are expressed differentially in the leaf mutants, suggesting that mutual regulation by auxin and gibberellin promotes compound leaf development." @default.
- W2155296502 created "2016-06-24" @default.
- W2155296502 creator A5023732584 @default.
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- W2155296502 date "2006-07-01" @default.
- W2155296502 modified "2023-10-01" @default.
- W2155296502 title "Hormone Interactions and Regulation of Unifoliata, PsPK2, PsPIN1 and LE Gene Expression in Pea ( Pisum sativum ) Shoot Tips" @default.
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- W2155296502 doi "https://doi.org/10.1093/pcp/pcj066" @default.
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