lecture_15B - CLV / WUS Interactions A feedback loop...

Info iconThis preview shows pages 1–23. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CLV / WUS Interactions A feedback loop between CLV and WUS maintains the stem cell population throughout the life of a plant. Flowering Time Flower Meristem Identity Flower Organ Identity Fruit Development FT APETALA1, LEAFY, CAULIFLOWER, (TERMINAL FLOWER) A, B, C, D FRUITFULL, SHATTERPROOF INDEHISCENT 1 2 3 4 5 6 7 8 9 10 12 13 11 * Traas and Vernoux, 2002 The shoot apical meristem (SAM) LFY, AP1 and CAL are expressed in flower meristems Fl ower meristems fail to form owers in the ap1 cal double mutant All flowers are converted into leafy shoots in lfy ap1 mutants The loss of flower formation in AP1 CAL mutants and in AP1 LFY mutants demonstrates that LFY, AP1 and CAL are required for flower development LFY is normally expressed in flower meristems. What would happen if LFY was constitutively expressed throughout the plant? Constitutive expression of LFY (or AP1 and CAL) converts shoots into flowers and promotes early flower development 35S::LFY Wil d type D. Weigel flower s 15 Year-old aspen trees D. Weigel 35S::LFY transgenic aspen trees Flower in less than six months D. Weigel The LFY and AP1 genes are expressed in flower meristems. The LFY and AP1 genes are expressed in flower meristems. In LFY/AP1 double mutants, flower meristems are converted into shoots (leaves and stems). The LFY and AP1 genes are expressed in flower meristems. In LFY/AP1 double mutants, flower meristems are converted into shoots (leaves and stems). LFY and AP1 normally act to promote flower meristem identity, meaning that they tell cells to form a flower rather than a shoot. The TFL gene is expressed in the shoot apical meristem where it acts to repress LFY and AP1 expression. The TFL gene is expressed in the shoot apical meristem where it acts to repress LFY and AP1 expression. In TFL mutants, LFY and AP1 are expressed in the shoot apical meristem, converting it into a terminal flower. The TFL gene is expressed in the shoot apical meristem where it acts to repress LFY and AP1 expression.where it acts to repress LFY and AP1 expression....
View Full Document

This note was uploaded on 10/16/2010 for the course BILD The Beginn taught by Professor Yanofsky during the Winter '09 term at UCSD.

Page1 / 84

lecture_15B - CLV / WUS Interactions A feedback loop...

This preview shows document pages 1 - 23. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online