Trichome morphogenesis in<i>Arabidopsis</i>

Schwab, Birgit; Folkers, Ulrike; Ilgenfritz, Hilmar; Hülskamp, Martin

doi:10.1098/rstb.2000.0623

Cited by 62 publications

(39 citation statements)

References 25 publications

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“…The most consistent vegetative phenotype of MPC RNAi plants was reduction of the number of branches on rosette leaf trichomes. Trichome branching is associated with endoreduplication of trichome nuclei (Schwab et al, 2000); one possibility is that loss of MPC function inhibits DNA replication.…”

Section: Discussionmentioning

confidence: 99%

MATERNALLY EXPRESSED PAB C-TERMINAL, a Novel Imprinted Gene inArabidopsis, Encodes the Conserved C-Terminal Domain of Polyadenylate Binding Proteins

et al. 2008

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Parental imprinting is important for seed development, but few imprinted genes have been identified in plants. The four known imprinted genes in Arabidopsis thaliana encode transcriptional regulators. Here, we describe a novel imprinted gene, MATERNALLY EXPRESSED PAB C-TERMINAL (MPC), which encodes the C-terminal domain of poly(A) binding proteins (PABPs). PABPs play roles in mRNA stability and translation. MPC interacts with proteins that also interact with the C-terminal domain of typical PABPs, suggesting that MPC may regulate translation by modulating PABP activity. In the endosperm, MPC is expressed only from the maternal allele. Reduction of MPC expression affects seed development. In dna methyltransferase1 (met1) mutants, MPC is ectopically expressed, and the paternal allele is active in the endosperm. CGs in the 5′ flanking region and gene body of MPC lose methylation in a met1 background. Both regions are required to confer imprinted reporter expression, suggesting that the gene body contains imprinting control region elements. In Arabidopsis, DEMETER (DME) activates expression of maternal alleles. MPC expression is reduced in flowers and seeds in a dme-4 mutant but only after fertilization in dme-1. We conclude that other factors along with DME promote MPC expression and that DME has indirect effects on imprinted gene expression in endosperm.

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Section: Discussionmentioning

confidence: 99%

MATERNALLY EXPRESSED PAB C-TERMINAL, a Novel Imprinted Gene inArabidopsis, Encodes the Conserved C-Terminal Domain of Polyadenylate Binding Proteins

et al. 2008

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“…The extensive studies on trichome development in Arabidopsis thaliana (e.g. Schwab et al 2000, Hu¨lskamp 2000, Szymanski et al 2000, Beilstein and Szymanski 2004 have identified a significant number of genes (e.g. ANGUSTIFOLIA, STICHEL, ZWICHEL) responsible for the genetic pathways that control trichome morphology.…”

Section: Charactersmentioning

confidence: 99%

Systematics and phylogeny of the Brassicaceae (Cruciferae): an overview

2006

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Abstract. A critical review of characters used in the systematics of the Brassicaceae is given, and aspects of the origin, classification, and generic delimitation of the family discussed. Molecular phylogenetic studies of the family were reviewed, and major clades identified. Based on molecular studies, especially from the ndhF chloroplast gene, and careful evaluation of morphology and generic circumscriptions, a new tribal alignment of the Brassicaceae is proposed. In all, 25 tribes are recognized, of which seven (Aethionemeae, Boechereae, Descurainieae, Eutremeae, Halimolobeae, Noccaeeae, and Smelowskieae) are described as new. For each tribe, the center(s) of distribution, morphology, and number of taxa are given. Of the 338 genera currently recognized in the Brassicaceae, about 260 genera (or about 77%) were either assigned or tentatively assigned to the 25 tribes. Some problems relating to various genera and tribes are discussed, and future research developments are briefly covered.

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“…The nonglandular trichomes are generally linear trichomes that lack secretory/storage cells at their tips (Schwab et al, 2000) and thus are not of interest for this investigation. The glandular trichomes of Solanum, on the other hand, first described by Luckwill (1943) and later reviewed extensively by Simmons and Gurr (2005), have been described as consisting of four distinct classes (types 1, 4, 6, and 7).…”

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confidence: 99%

Comparative Functional Genomic Analysis ofSolanumGlandular Trichome Types

et al. 2010

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Glandular trichomes play important roles in protecting plants from biotic attack by producing defensive compounds. We investigated the metabolic profiles and transcriptomes to characterize the differences between different glandular trichome types in several domesticated and wild Solanum species: Solanum lycopersicum (glandular trichome types 1, 6, and 7), Solanum habrochaites (types 1, 4, and 6), Solanum pennellii (types 4 and 6), Solanum arcanum (type 6), and Solanum pimpinellifolium (type 6). Substantial chemical differences in and between Solanum species and glandular trichome types are likely determined by the regulation of metabolism at several levels. Comparison of S. habrochaites type 1 and 4 glandular trichomes revealed few differences in chemical content or transcript abundance, leading to the conclusion that these two glandular trichome types are the same and differ perhaps only in stalk length. The observation that all of the other species examined here contain either type 1 or 4 trichomes (not both) supports the conclusion that these two trichome types are the same. Most differences in metabolites between type 1 and 4 glands on the one hand and type 6 glands on the other hand are quantitative but not qualitative. Several glandular trichome types express genes associated with photosynthesis and carbon fixation, indicating that some carbon destined for specialized metabolism is likely fixed within the trichome secretory cells. Finally, Solanum type 7 glandular trichomes do not appear to be involved in the biosynthesis and storage of specialized metabolites and thus likely serve another unknown function, perhaps as the site of the synthesis of protease inhibitors.Trichomes are epidermal structures widely conserved across the plant kingdom (Kim and Mahlberg, 1991;Wagner, 1991;Alonso et al., 1992;Yu et al., 1992;Kolb and Muller, 2003;Valkama et al., 2003;Giuliani and Bini, 2008). These structures perform important biological functions, such as discouraging herbivory, attracting pollinators, and maintaining a boundary layer (Nihoul, 1993;Van Dam and Hare, 1998;Kennedy, 2003;Moyano et al., 2003;Simmons and Gurr, 2005;Liu et al., 2006;Horgan et al., 2007;Gonzalez et al., 2008;Romero et al., 2008;Nonomura et al., 2009;Kang et al., 2010). Many of these functions are the result of the specialized nature of glandular trichomes (glands) as sites for the synthesis and storage of biologically active specialized metabolites (Alonso et al

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Trichome morphogenesis inArabidopsis

Cited by 62 publications

References 25 publications

MATERNALLY EXPRESSED PAB C-TERMINAL, a Novel Imprinted Gene inArabidopsis, Encodes the Conserved C-Terminal Domain of Polyadenylate Binding Proteins

MATERNALLY EXPRESSED PAB C-TERMINAL, a Novel Imprinted Gene inArabidopsis, Encodes the Conserved C-Terminal Domain of Polyadenylate Binding Proteins

Systematics and phylogeny of the Brassicaceae (Cruciferae): an overview

Comparative Functional Genomic Analysis ofSolanumGlandular Trichome Types

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