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The MADS-box gene DAL1 is a potential mediator of the juvenile-to-adult transition in Norway spruce (Picea abies)
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- Carlsbecker, Annelie (author)
- Uppsala universitet,Institutionen för evolution, genomik och systematik,Fysiologisk botanik,Peter Engström
- Tandre, Karolina (author)
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- Johanson, Urban (author)
- Lund University,Lunds universitet,Biokemi och Strukturbiologi,Centrum för Molekylär Proteinvetenskap,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Biochemistry and Structural Biology,Center for Molecular Protein Science,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- 2004
- 2004
- English.
- In: The Plant Journal. ; 40:4, s. 546-557
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Progression through the plant life cycle involves changes in many essential features, most notably in the capacity to reproduce. The transition from juvenile vegetative and non-reproductive to an adult reproductive phase is gradual and can take many years; in the conifer Norway spruce, Picea abiea, typically 20-25 years. We present a detailed analysis of the activities of three regulatory genes with potential roles in the transition in Norway spruce: DAL1, a MADS-box gene related to the AGL6 group of genes from angiosperms, and the two LEAFY-related genes PaLFY and PaNLY. DAL1 activity is initiated in the shoots of juvenile trees at an age of 3-5 years, and then increases with age, whereas both LFY genes are active throughout the juvenile phase. The activity of DAL1 further shows a spatial pattern along the stem of the tree that parallels a similar gradient in physiolpoical and morphological features associated with maturation to the adult phase. Constitutive expression of DAL1 in transgenic Arabidopsis plants caused a dramatic attenuation of both juvenile and adult growth phases;flowers forming immediately after the embryogenic phase of development in severely affected plants. Taken together, our resulsts support the notion that DAL1 may have a regulatory role in the juvenile-to-adult transition in Norway spruce.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- conifer
- development
- reproduction
- MADS transcription factor
- LEAFY
- NEEDLY
- Plant physiology
- Växtfysiologi
- Cell and molecular biology
- Cell- och molekylärbiologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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