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The MADS-box gene DAL1 is a potential mediator of the juvenile-to-adult transition in Norway spruce (Picea abies)
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolution, genomik och systematik. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Fysiologisk botanik. Fysiologisk botanik. (Peter Engström)
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolution, genomik och systematik. Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för organismbiologi, Fysiologisk botanik. Fysiologisk botanik. (Peter Engström)
Vise andre og tillknytning
2004 (engelsk)Inngår i: The Plant Journal, Vol. 40, s. 546-557Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

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.

sted, utgiver, år, opplag, sider
2004. Vol. 40, s. 546-557
Emneord [en]
conifer, development, reproduction, MADS transcription factor, LEAFY, NEEDLY
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Identifikatorer
URN: urn:nbn:se:uu:diva-287514OAI: oai:DiVA.org:uu-287514DiVA, id: diva2:922863
Tilgjengelig fra: 2016-04-25 Laget: 2016-04-25 Sist oppdatert: 2016-04-25

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Carlsbecker, AnnelieEnglund, Marie

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