Brassicaceae (Mustard Family)

Al‐Shehbaz, Ihsan A.

doi:10.1002/9780470015902.a0003690.pub2

Cited by 21 publications

(13 citation statements)

References 44 publications

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“…Dehiscent, two‐locular capsules are the typical fruits produced by members of the Brassicaceae (Al‐Shehbaz, ). They are considered to represent the ancestral fruit form within the family, although indehiscent fruits evolved many times independently (Hall et al ., ; Mühlhausen et al ., ).…”

Section: Discussionmentioning

confidence: 99%

When the BRANCHED network bears fruit: how carpic dominance causes fruit dimorphism in Aethionema

et al. 2018

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Life in unpredictably changing habitats is a great challenge, especially for sessile organisms like plants. Fruit and seed heteromorphism is one way to cope with such variable environmental conditions. It denotes the production of distinct types of fruits and seeds that often mediate distinct life-history strategies in terms of dispersal, germination and seedling establishment. But although the phenomenon can be found in numerous species and apparently evolved several times independently, its developmental time course or molecular regulation remains largely unknown. Here, we studied fruit development in Aethionema arabicum, a dimorphic member of the Brassicaceae family. We characterized fruit morph differentiation by comparatively analyzing discriminating characters like fruit growth, seed abortion and dehiscence zone development. Our data demonstrate that fruit morph determination is a 'last-minute' decision happening in flowers after anthesis directly before the first morphotypical differences start to occur. Several growth experiments in combination with hormone and gene expression analyses further indicate that an accumulation balance of the plant hormones auxin and cytokinin in open flowers together with the transcript abundance of the Ae. arabicum ortholog of BRANCHED1, encoding a transcription factor known for its conserved function as a branching repressor, may guide fruit morph determination. Thus, we hypothesize that the plasticity of the fruit morph ratio in Ae. arabicum may have evolved through the modification of a preexisting network known to govern correlative dominance between shoot organs.

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Section: Discussionmentioning

confidence: 99%

When the BRANCHED network bears fruit: how carpic dominance causes fruit dimorphism in Aethionema

et al. 2018

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“…Brassicaceae are believed to have originated in the Irano‐Turanian region (Franzke et al, ), and Mediterranean Europe, central and western Asia, and western North America were suggested to be diversification zones (Al‐Shehbaz, ). Because of the ambiguous phylogenetic topology of Brassicaceae based on different markers and biased samples (Al‐Shehbaz et al, ; Koch et al, ; Franzke et al, ; Couvreur et al, ; Tsuda et al, ; Huang et al, ), until now, the origination and diversification zones of Brassicaceae were not well supported by poorly resolved phylogenetic trees.…”

Section: Discussionmentioning

confidence: 99%

“…Based on species diversity, it is speculated that the Brassicaceae originated in the Irano‐Turanian region, which is one of the major diversification centers, with approximately 900 species in approximately 150 genera (Franzke et al, ). The level of diversification is also high in the Mediterranean region of Europe, central and western Asia, and western North America (Al‐Shehbaz, ). As a major biodiversity hotspot, with approximately 180 species of Brassicaceae in 76 genera, the Qinghai–Tibet Plateau (QTP) has also been considered to be another distribution center (Zhou et al, ; Wang et al, ).…”

Section: Introductionmentioning

confidence: 99%

Phylogenetics and dispersal patterns of Brassicaceae around the Qinghai–Tibet Plateau

Chen

Shi

Liu

et al. 2018

J of Sytematics Evolution

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Brassicaceae, one of the most diverse and economically valuable plant families, is distributed all over the world. Previous studies have suggested that Brassicaceae originated and diversified in the Old World. In this study, the phylogenetic relationships of 17 tribes of Brassicaceae from the Qinghai-Tibet Plateau (QTP) and adjacent areas were investigated using nuclear ribosomal internal transcribed spacer (nrITS) and chloroplast DNA sequence data (rbcL and petB-petD) with maximum likelihood, maximum parsimony, and Bayesian methods. As suggested by both the nrITS and chloroplast DNA trees, Cardaria pubescens (C.A.Mey.) Jarm. (Lepidieae) and Draba lanceolata Royle (Arabideae) should be classified in the Eutremeae and Cardamineae, respectively. Based on over 700 newly sequenced and published nrITS sequences of Brassicaceae, an up-to-date comprehensive phylogeny of the family was reconstructed using the maximum likelihood method. In the phylogenetic tree, 10 monophyletic tribes were detected. They were used to clarify the lineage diversification and dispersal patterns of the 10 tribes. The results showed that most of the monophyletic tribes may have originated in different regions of the world, and then dispersed into other regions surrounding the QTP. Rapid lineage diversification rate shifts were detected in several tribes, such as Anastaticeae, which experienced a rapid shift event $1.38 Mya, corresponding to the rapid uplift of the QTP, indicating that the recent uplift of the QTP could have promoted diversification in Brassicaceae across and adjacent to the QTP. Key words: Brassicaceae, dispersal pattern, eastern Asia, phylogenetic relationship, Qinghai-Tibet Plateau (QTP). (Al-Shehbaz, 2011). As a major biodiversity hotspot, with approximately 180 species of Brassicaceae in 76 genera, the Dispersal of Brassicaceae around QTP 203 www.jse.ac.cn

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“…As evidenced from previous family‐wide studies of Brassicaceae (e.g. Koch et al ., ; German et al ., ; Khosravi et al ., ; Couvreur et al ., ; Warwick et al ., ), Erysimum clearly belongs to the evolutionary lineage I (introduced by Beilstein et al ., ) that includes 15 tribes (Al‐Shehbaz, , ; Koch et al ., ). However, its phylogenetic position in this lineage has not been fully resolved and varied considerably among previous studies.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic perspectives on diversification and character evolution in the species-rich genusErysimum(Erysimeae; Brassicaceae) based on a densely sampled ITS approach

et al. 2014

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Erysimum includes 150–350 species distributed in the Northern Hemisphere, with Eurasia being the centre of greatest diversity. It is well known for its taxonomic complexity as a result of overlapping morphological characters. We present the first densely sampled phylogenetic analysis of Erysimum using internal transcribed spacer (ITS) DNA sequences from c. 85% of the species (117 for the first time), representing the full range of morphological variation and geographical distribution. We used several approaches to reconstruct phylogenetic relationships, dating of diversification and patterns of evolution of morphological characters in the genus. Ancestral‐state reconstructions of four morphological diagnostic characters were performed using maximum parsimony, maximum likelihood and Bayesian methods. Our phylogenetic framework strongly supports the monophyly of Erysimum and recovers some well‐supported clades that are geographically, rather than morphologically, correlated. Our study confirms the placement of Erysimum in lineage I and reveals two Malcolmia spp. (M. maritima and M. orsiniana) as its sister taxa. The results suggest that the biennial duration and caespitose habit (vs. annual or perennial duration and herbaceous or woody habit) and large, yellow, glabrous (vs. small, non‐yellow, pubescent) petals are ancestral in Erysimum. The ancestral‐state reconstruction results show that annual vs. perennial and woody vs. herbaceous features have been independently derived several times. The dating analyses suggest an early radiation of Erysimum during the late Pliocene or early Pleistocene. © 2014 The Linnean Society of London, Botanical Journal of the Linnean Society, 2014, 175, 497–522.

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Brassicaceae (Mustard Family)

Cited by 21 publications

References 44 publications

When the BRANCHED network bears fruit: how carpic dominance causes fruit dimorphism in Aethionema

When the BRANCHED network bears fruit: how carpic dominance causes fruit dimorphism in Aethionema

Phylogenetics and dispersal patterns of Brassicaceae around the Qinghai–Tibet Plateau

Phylogenetic perspectives on diversification and character evolution in the species-rich genusErysimum(Erysimeae; Brassicaceae) based on a densely sampled ITS approach

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