PMID: 9418049Jan 7, 1998Paper

Expression of heterologous phytochromes A, B or C in transgenic tobacco plants alters vegetative development and flowering time

The Plant Journal : for Cell and Molecular Biology
Karen J HallidayGarry C Whitelam

Abstract

In this study, oat phytochrome A (phyA), Arabidopsis phytochrome B (phyB) or Arabidopsis phytochrome C (phyC) were expressed in both day-neutral and photo-period-sensitive (short-day) tobacco (Nicotiana tabacum cv. Hicks). Introgression of the Maryland Mammoth (MM) gene into cv Hicks was used to confer short-day photo-periodic sensitivity. Expression of oat phyA led to characteristic hypersensitivity of hypocotyls to red light (R) and far-red light (FR) and an overall dwarfing of the mature plant. Expression of Arabidopsis phyB enhanced the sensitivity of hypocotyls to R and caused even more marked dwarfing of the mature plant. In contrast, the expression of Arabidopsis phyC had no detectable consequences for the photocontrol of hypocotyl elongation. However, phyC expression did lead to a R-dependent increase in cotyledon expansion in de-etiolating seedlings and to a significant increase in leaf area in mature plants. This provides the first experimental evidence that phyC is biologically active. The flowering time of cv Hicks plants grown under 8 h photoperiods was virtually unaffected by a 30 min white light (W) night break given 8 h into the dark period. In contrast, cv Hicks MM plants responded to a night break with a delay...Continue Reading

Citations

Dec 18, 2004·Plant Molecular Biology·Petr SmykalSiegbert Melzer
Nov 26, 1999·The Plant Journal : for Cell and Molecular Biology·L HennigE Schafer
Nov 9, 2000·The Plant Journal : for Cell and Molecular Biology·J L WellerR E Kendrick
Nov 4, 1998·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·P H Quail
Nov 4, 1998·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·G C WhitelamP F Devlin
Jan 12, 2001·Plant Physiology·B L MontgomeryJ C Lagarias
Sep 4, 2003·The Plant Cell·Keara A FranklinGarry C Whitelam
Nov 24, 2011·PloS One·Fa-Qiang WuYong-Fu Fu
Dec 9, 2003·Journal of Plant Physiology·Toshiyuki OgawaraHiroshi Ezura
Aug 2, 2008·PLoS Genetics·Thierry GenoudChristian Fankhauser
Jan 26, 2007·Journal of Experimental Botany·Said S H HusaineidAlexander R van der Krol
Jan 1, 2004·The Arabidopsis Book·Haiyang Wang, Xing Wang Deng
Jun 1, 2002·The New Phytologist·Simon G MøllerGarry C Whitelam

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