ASYMMETRIC LEAVES2-LIKE1gene, a member of the AS2/LOB family, controls proximal?distal patterning in Arabidopsis petals

Chalfun-Júnior, Antônio; Franken, John; Mes, Jurriaan J.; Marsch-Martínez, Nayelli; Pereira, Andy; Angenent, Gerco C.

doi:10.1007/s11103-005-0698-4

Cited by 106 publications

(94 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, several loss-of-function mutants of rice and maize LBD genes have been reported to evidence clear phenotypes (Inukai et al, 2005;Liu et al, 2005;Bortiri et al, 2006;Evans, 2007;Taramino et al, 2007). The ectopic expression of several LBD genes, as wild type or as proteins fused to a transcriptional repression domain, yielded morphological phenotypes, provid- ing clues to the biological functions of these LBD genes (Shuai et al, 2002;Chalfun-Junior et al, 2005;Borghi et al, 2007;Okushima et al, 2007). For example, the overexpression of LBD16 or LBD29 induced lateral root formation in the absence of ARF7 and ARF19, and the dominant repression of LBD16 activity inhibited lateral root formation; these findings suggest that these LBDs function downstream of ARF7-and ARF19-dependent auxin signaling in lateral root formation (Okushima et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…The gain-of-function mutants of LBD36/ASL1, designated downwards siliques1, showed shorter internodes and downward lateral organs such as flowers (Chalfun-Junior et al, 2005). Although the lbd36 loss-of-function mutants did not show morphological phenotypes, the analysis of lbd36 as2 double mutants showed that these two members act redundantly to control cell fate determination in the petals.…”

mentioning

confidence: 99%

See 1 more Smart Citation

LBD18/ASL20Regulates Lateral Root Formation in Combination withLBD16/ASL18Downstream ofARF7andARF19in Arabidopsis

et al. 2009

View full text Add to dashboard Cite

The LATERAL ORGAN BOUNDARIES DOMAIN/ASYMMETRIC LEAVES2-LIKE (LBD/ASL) genes encode proteins harboring a conserved amino acid domain, referred to as the LOB (for lateral organ boundaries) domain. While recent studies have revealed developmental functions of some LBD genes in Arabidopsis (Arabidopsis thaliana) and in crop plants, the biological functions of many other LBD genes remain to be determined. In this study, we have demonstrated that the lbd18 mutant evidenced a reduced number of lateral roots and that lbd16 lbd18 double mutants exhibited a dramatic reduction in the number of lateral roots compared with lbd16 or lbd18. Consistent with this observation, significant b-glucuronidase (GUS) expression in Pro LBD18 :GUS seedlings was detected in lateral root primordia as well as in the emerged lateral roots. Whereas the numbers of primordia of lbd16, lbd18, and lbd16 lbd18 mutants were similar to those observed in the wild type, the numbers of emerged lateral roots of lbd16 and lbd18 single mutants were reduced significantly. lbd16 lbd18 double mutants exhibited additively reduced numbers of emerged lateral roots compared with single mutants. This finding indicates that LBD16 and LBD18 may function in the initiation and emergence of lateral root formation via a different pathway. LBD18 was shown to be localized into the nucleus. We determined whether LBD18 functions in the nucleus using a steroid regulator-inducible system in which the nuclear translocation of LBD18 can be regulated by dexamethasone in the wild-type, lbd18, and lbd16 lbd18 backgrounds. Whereas LBD18 overexpression in the wild-type background induced lateral root formation to some degree, other lines manifested the growth-inhibition phenotype. However, LBD18 overexpression rescued lateral root formation in lbd18 and lbd16 lbd18 mutants without inducing any other phenotypes. Furthermore, we demonstrated that LBD18 overexpression can stimulate lateral root formation in auxin response factor7/19 (arf7 arf19) mutants with blocked lateral root formation. Taken together, our results suggest that LBD18 functions in the initiation and emergence of lateral roots, in conjunction with LBD16, downstream of ARF7 and ARF19.

show abstract

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

LBD18/ASL20Regulates Lateral Root Formation in Combination withLBD16/ASL18Downstream ofARF7andARF19in Arabidopsis

et al. 2009

View full text Add to dashboard Cite

show abstract

“…SlCYP707A1 coding region was recombined between the CauliXower Mosaic Virus 35S promoter in the pGD625 vector (Chalfun-Junior et al 2005) and the NOPALINE SYNTHASE terminator. Water stress experiment…”

Section: Overexpression Linesmentioning

confidence: 99%

Abscisic acid levels in tomato ovaries are regulated by LeNCED1 and SlCYP707A1

Nitsch

Oplaat

Feron

et al. 2009

Planta

View full text Add to dashboard Cite

Although the hormones, gibberellin and auxin, are known to play a role in the initiation of fruits, no such function has yet been demonstrated for abscisic acid (ABA). However, ABA signaling and ABA responses are high in tomato (Solanum lycopersicum L.) ovaries before pollination and decrease thereafter (Vriezen et al. in New Phytol 177:60-76, 2008). As a Wrst step to understanding the role of ABA in ovary development and fruit set in tomato, we analyzed ABA content and the expression of genes involved in its metabolism in relation to pollination. We show that ABA levels are relatively high in mature ovaries and decrease directly after pollination, while an increase in the ABA metabolite dihydrophaseic acid was measured. An important regulator of ABA biosynthesis in tomato is 9-cis-epoxy-carotenoid dioxygenase (LeNCED1), whose mRNA level in ovaries is reduced after pollination. The increased catabolism is likely caused by strong induction of one of four newly identiWed putative (+)ABA 8Ј-hydroxylase genes. This gene was named SlCYP707A1 and is expressed speciWcally in ovules and placenta. Transgenic plants, overexpressing SlCYP707A1, have reduced ABA levels and exhibit ABA-deWcient phenotypes suggesting that this gene encodes a functional ABA 8Ј-hydroxylase. Gibberellin and auxin application have diVerent eVects on the LeNCED1 and SlCYP707A1 gene expression. The crosstalk between auxins, gibberellins and ABA during fruit set is discussed.

show abstract

“…Core CC genes are depicted in purple. Self-regulation and homodimerization were removed from the network figure. to the cluster based on experimental PPI data (Chalfun-Junior et al, 2005;Phelps-Durr et al, 2005).…”

Section: The Integrated Arabidopsis Text and Interaction Networkmentioning

confidence: 99%

The Potential of Text Mining in Data Integration and Network Biology for Plant Research: A Case Study onArabidopsis

et al. 2013

View full text Add to dashboard Cite

Despite the availability of various data repositories for plant research, a wealth of information currently remains hidden within the biomolecular literature. Text mining provides the necessary means to retrieve these data through automated processing of texts. However, only recently has advanced text mining methodology been implemented with sufficient computational power to process texts at a large scale. In this study, we assess the potential of large-scale text mining for plant biology research in general and for network biology in particular using a state-of-the-art text mining system applied to all PubMed abstracts and PubMed Central full texts. We present extensive evaluation of the textual data for Arabidopsis thaliana, assessing the overall accuracy of this new resource for usage in plant network analyses. Furthermore, we combine text mining information with both protein-protein and regulatory interactions from experimental databases. Clusters of tightly connected genes are delineated from the resulting network, illustrating how such an integrative approach is essential to grasp the current knowledge available for Arabidopsis and to uncover gene information through guilt by association. All largescale data sets, as well as the manually curated textual data, are made publicly available, hereby stimulating the application of text mining data in future plant biology studies.

show abstract

ASYMMETRIC LEAVES2-LIKE1gene, a member of the AS2/LOB family, controls proximal?distal patterning in Arabidopsis petals

Cited by 106 publications

References 52 publications

LBD18/ASL20Regulates Lateral Root Formation in Combination withLBD16/ASL18Downstream ofARF7andARF19in Arabidopsis

LBD18/ASL20Regulates Lateral Root Formation in Combination withLBD16/ASL18Downstream ofARF7andARF19in Arabidopsis

Abscisic acid levels in tomato ovaries are regulated by LeNCED1 and SlCYP707A1

The Potential of Text Mining in Data Integration and Network Biology for Plant Research: A Case Study onArabidopsis

Contact Info

Product

Resources

About