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Title of Journal: Acta Physiol Plant

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Abbravation: Acta Physiologiae Plantarum

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Springer-Verlag

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DOI

10.1002/ir.20003

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1861-1664

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Transformation of Emphasis Type="Italic"PttKN1/

Authors: LaiSheng Meng WeiQiao Ding Xin Hu ChongYing Wang
Publish Date: 2009/02/13
Volume: 31, Issue: 4, Pages: 683-691
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Abstract

We have established a shoot regeneration system and genetic transformation of cockscomb Celosia cristata and Celosia plumosus The best results in terms of frequency of shoot regeneration and number of shoot buds per explant are observed on media supplemented with 05 mg l−1 6BA for explants of apical meristems of C cristata or 20 mg l−1 6BA 05  mg l−1 NAA and 05  mg l−1 IAA for hypocotyls explants of C plumosus We use apical meristems of C cristata and hypocotyls of C plumosus as the starting material for transformation A novel KNOTTED1like homeobox1 KNOX PttKN1 Populus tremula × P tremuoides knotted1 isolated from the vascular cambial region of hybrid aspen is introduced into cockscomb by Agrobacterium A series of novel phenotypes are obtained from the transgenic cockscomb plants including lobed or rumpled leaves partite leaves and two or three leaves developed on the same petiole on the basis of their leaf phenotypes Transformants are selected by different concentrations of kanamycin Transformants are confirmed by PCR of the NptII gene and PCR or RTPCR of PttKN1 gene Furthermore RTPCR shows that 35S PttKN1 RNA levels do not correlate with phenotypic severity It is discussed that our results bring elements on possible function of PttKN1 gene To our knowledge genetic transformation of cockscomb is first reported

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