Title : Modulation of intracellular proline levels affects flowering time and inflorescence architecture in Arabidopsis.

Pub. Date : 2008 Feb

PMID : 18060533






7 Functional Relationships(s)
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1 To investigate on the possible role of proline in flowering, we altered the expression of AtP5CS1, encoding the rate-limiting enzyme of proline biosynthesis in plants. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana
2 To investigate on the possible role of proline in flowering, we altered the expression of AtP5CS1, encoding the rate-limiting enzyme of proline biosynthesis in plants. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana
3 In addition p5cs1 mutants exhibited a shorter size and contained lower levels of proline, compared to wild type. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana
4 35S-P5CS1 plants, manifested, early in development, overexpression of P5CS1 and accumulation of proline, leading to early flowering, both under long- and short-day conditions. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana
5 Later in development, down-regulation of P5CS1 occurred in 35S-P5CS1 leaves, leading to proline reduction, and, in turn, impaired bolting and stunted growth. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana
6 Later in development, down-regulation of P5CS1 occurred in 35S-P5CS1 leaves, leading to proline reduction, and, in turn, impaired bolting and stunted growth. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana
7 Salt-stress restored expression of P5CS1 and proline accumulation in P5CS1-transformed plants, as well as rescuing growth. Proline delta1-pyrroline-5-carboxylate synthase 1 Arabidopsis thaliana