PMID: 9161040Apr 1, 1997Paper

Localization of expression of KNAT3, a class 2 knotted1-like gene

The Plant Journal : for Cell and Molecular Biology
K SerikawaP C Zambryski

Abstract

KNAT3 is a class 2 kn1-like gene in Arabidopsis thaliana. The RNA expression patterns of KNAT3 were characterized through the use of promoter-GUS fusion analysis and in situ hybridization. KNAT3 is expressed in several tissues and at several times during development. There are three main expression patterns: (1) during early organ development in young leaves, buds and pedicels; (2) at and near the junction between two organs at specific times during development, including the hypocotyl-root boundary in young seedlings, the anther-filament junction in mature flowers, and the ovule-funiculus and peduncle-silique boundaries in elongating siliques; and (3) in maturing tissues such as the style of elongating siliques, the petioles of maturing leaves, and most of the root. The varied expression patterns may indicate that KNAT3 plays several different roles in plants, depending on when and where it is expressed. Previous work on KNAT3 (Serikawa et al., 1996) indicated that expression of its RNA is regulated by light. Promoter-GUS seedlings were grown under different light conditions (continuous white, red and far-red light) to examine more closely the light regulation of the KNAT3 promoter. Continuous white light resulted in stronger ...Continue Reading

Citations

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