Light-dependent gravitropism and negative phototropism of inflorescence stems in a dominant Aux/IAA mutant of Arabidopsis thaliana, axr2

Sato, Atsuko; Sasaki, Shu; Matsuzaki, Jun; Yamamoto, Kotaro T.

doi:10.1007/s10265-014-0643-1

Cited by 18 publications

(11 citation statements)

References 63 publications

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“…Loss-of-function mutation in IAA3/SHY2 has effects on auxin homeostasis and lateral root formation [ 25 ]. Inflorescences of a dominant mutant of A. thaliana IAA7 / ARX2 have negative phototropism and gravitropism defects [ 26 ]. The mutant of AXR3-1 / IAA17-1 has enhanced apical dominance and a decreased number of lateral roots, which are associated with an increased auxin response [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Evolution Analysis of the Aux/IAA Gene Family in Plants Shows Dual Origins and Variable Nuclear Localization Signals

Liu

Wang

et al. 2017

IJMS

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Abstract:The plant hormone auxin plays pivotal roles in many aspects of plant growth and development. The auxin/indole-3-acetic acid (Aux/IAA) gene family encodes short-lived nuclear proteins acting on auxin perception and signaling, but the evolutionary history of this gene family remains to be elucidated. In this study, the Aux/IAA gene family in 17 plant species covering all major lineages of plants is identified and analyzed by using multiple bioinformatics methods. A total of 434 Aux/IAA genes was found among these plant species, and the gene copy number ranges from three (Physcomitrella patens) to 63 (Glycine max). The phylogenetic analysis shows that the canonical Aux/IAA proteins can be generally divided into five major clades, and the origin of Aux/IAA proteins could be traced back to the common ancestor of land plants and green algae. Many truncated Aux/IAA proteins were found, and some of these truncated Aux/IAA proteins may be generated from the C-terminal truncation of auxin response factor (ARF) proteins. Our results indicate that tandem and segmental duplications play dominant roles for the expansion of the Aux/IAA gene family mainly under purifying selection. The putative nuclear localization signals (NLSs) in Aux/IAA proteins are conservative, and two kinds of new primordial bipartite NLSs in P. patens and Selaginella moellendorffii were discovered. Our findings not only give insights into the origin and expansion of the Aux/IAA gene family, but also provide a basis for understanding their functions during the course of evolution.

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Section: Introductionmentioning

confidence: 99%

Evolution Analysis of the Aux/IAA Gene Family in Plants Shows Dual Origins and Variable Nuclear Localization Signals

Liu

Wang

et al. 2017

IJMS

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“…6 ). The Arabidopsis AtSAUR50 gene is involved in light signal-mediated pedicel development 42 . In sunflower ( Helianthus annuus ), the SAUR50 -like gene is more highly expressed on the eastern side of stems during the day, leading to sun-tracking movement during the seedling stage 43 .…”

Section: Resultsmentioning

confidence: 99%

The Phoebe genome sheds light on the evolution of magnoliids

et al. 2020

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Lauraceae includes the genus Phoebe, and the family is linked to the evolution of magnoliids. We sequenced the genome of Phoebe bournei Nanmu. The assembled genome size was 989.19 Mb, with a contig N50 value of 2.05 Mb. A total of 28,198 protein-coding genes were annotated in P. bournei. Whole-genome duplication (WGD) analysis showed that Lauraceae has experienced two WGD events; the older WGD event occurred just before the divergence of Lauraceae and Magnoliales, and the more recent WGD was shared by all lineages of Lauraceae. The phylogenetic tree showed that magnoliids form a sister clade to monocots and eudicots. We also identified 63 MADS-box genes, including AGL12-like genes that may be related to the regulation of P. bournei roots and FIN219-like genes encoding GH3 proteins, which are involved in photomorphogenesis. SAUR50-like genes involved in light signal-mediated pedicel or stem development were also identified. Four ATMYB46-and three PtrEPSP-homologous genes related to lignin biosynthesis were identified. These genes may be associated with the formation of straight trunks in P. bournei. Overall, the P. bournei reference genome provides insight into the origin, evolution, and diversification of Phoebe and other magnoliids.

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“…Among the five or six DEGs in the W2 region, the AUX/IAA7.1 -like gene G102554 (MD10G1192900) appeared to fit well the role of W2 . Several characterized AUX/IAA like genes in Arabidopsis were shown to act as a repressor of auxin-inducible gene expression and to play roles in the control of gravitropic growth and development in light-grown seedlings ( Yu et al , 2013 ; Sato et al , 2014 , 2015 ).…”

Section: Discussionmentioning

confidence: 99%

Exploring DNA variant segregation types in pooled genome sequencing enables effective mapping of weeping trait in Malus

Dougherty

Singh

Brown

et al. 2018

Journal of Experimental Botany

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Light-dependent gravitropism and negative phototropism of inflorescence stems in a dominant Aux/IAA mutant of Arabidopsis thaliana, axr2

Abstract: Fig. S1 Longitudinal sections of the primary stem of the wild type and axr2-1 stained for amyloplasts. The wild type (left) and axr2-1 (right) stem segments

Cited by 18 publications

References 63 publications

Evolution Analysis of the Aux/IAA Gene Family in Plants Shows Dual Origins and Variable Nuclear Localization Signals

Evolution Analysis of the Aux/IAA Gene Family in Plants Shows Dual Origins and Variable Nuclear Localization Signals

The Phoebe genome sheds light on the evolution of magnoliids

Exploring DNA variant segregation types in pooled genome sequencing enables effective mapping of weeping trait in Malus

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