2013
DOI: 10.5511/plantbiotechnology.13.0513a
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ASYMMETRIC LEAVES2 and FASCIATA2 cooperatively regulate the formation of leaf adaxial-abaxial polarity in Arabidopsis thaliana

Abstract: The establishment of adaxial-abaxial polarity in the early stage of leaf development is important for the expansion of lamina. In Arabidopsis thaliana, asymmetric leaves2 (as2) and as1 mutations cause defects in the leaf adaxialabaxial polarity, which are exhibited as abaxialized filamentous leaves in the various modifier mutant backgrounds. Several modifier single mutants generate pointed leaves in common. Mutations in FASCIATA2 (FAS2) also cause pointed leaves. The FAS2 gene encodes a component of Chromatin … Show more

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Cited by 7 publications
(5 citation statements)
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“…We quantified transcripts of PHABULOSA (PHB), one of the genes in the HD-ZIP III family that specify the adaxial cell fate; ETT/ARF3, ARF4, KANADI2 (KAN2), FIL, YABBY5 (YAB5) genes that specify the abaxial cell fate; and the BP, KNAT2, SHOOT MERISTEMLESS (STM) genes, which are members of the class 1 KNOX gene family and are expressed in the SAM and its periphery in wild-type plants. As shown in Figure 3, the transcript levels of BP, KAN2, FIL and YAB5 genes were significantly increased in the as2-1 mutant compared with those in Col-0 (wild-type) plant, consistent with our previous report (Kojima et al 2011;Ishibashi et al 2013). The transcript levels of KNAT2, STM, ETT/ARF3, ARF4, KAN2 genes were increased in the icu2-1 mutant compared with those in Col-0 (wildtype) plant.…”
Section: Levels Of Transcripts Of the Abaxial Determinant Genes And Csupporting
confidence: 90%
“…We quantified transcripts of PHABULOSA (PHB), one of the genes in the HD-ZIP III family that specify the adaxial cell fate; ETT/ARF3, ARF4, KANADI2 (KAN2), FIL, YABBY5 (YAB5) genes that specify the abaxial cell fate; and the BP, KNAT2, SHOOT MERISTEMLESS (STM) genes, which are members of the class 1 KNOX gene family and are expressed in the SAM and its periphery in wild-type plants. As shown in Figure 3, the transcript levels of BP, KAN2, FIL and YAB5 genes were significantly increased in the as2-1 mutant compared with those in Col-0 (wild-type) plant, consistent with our previous report (Kojima et al 2011;Ishibashi et al 2013). The transcript levels of KNAT2, STM, ETT/ARF3, ARF4, KAN2 genes were increased in the icu2-1 mutant compared with those in Col-0 (wildtype) plant.…”
Section: Levels Of Transcripts Of the Abaxial Determinant Genes And Csupporting
confidence: 90%
“…Many mutations that enhance leaf polarity defects of as1 and as2 have been isolated and characterized, which is reminiscent of the presence of the cold‐sensitive pathway in the original phan mutant of Antirrhinum and handlebars as the enhancer mutation of phan . The causative genes are designated as modifiers of AS1 and AS2 and, as listed in Table they include those for biogenesis of tasiR‐ARF, biogenesis of ribosomes, chromatin modification and nucleosome assembly proteasome‐mediated protein degradation, genomic stability, and cell proliferation. Prominent phenotypes in almost all double mutants with as2 and a modifier mutation involve the generation of filamentous leaf‐like organs (Figure (b)), which are surrounded by an abaxialized epidermis and possess no or markedly premature vascular tissues.…”
Section: Adaxial–abaxial Polarity Specification Of Leaves By As1–as2mentioning
confidence: 99%
“…Therefore, the synergistic repression of these ARFs is achieved by the two independent pathways, AS1–AS2 and factors involved in small RNA biogenesis such as RDR6 , AGO7 , and DCL4 , as illustrated in Figure . Molecular mechanisms for the prominent repression by other modifiers and AS1–AS2 have yet to be elucidated, but they might be involved in such repression through independent pathways (Figure ). It might be worthwhile, however, to stress that modifier mutations so far identified are weak alleles of genes that are essential for cell viability or, conversely, strong alleles of one of the functionally redundant members of such essential gene families.…”
Section: Adaxial–abaxial Polarity Specification Of Leaves By As1–as2mentioning
confidence: 99%
“…We outcrossed as2-1 with Col-0 three times and used the progeny for our experiments (Kojima et al 2011). Details of top1α-1, fas2-2, rh10-1, as2-1 rh10-1 were described previously (Ishibashi et al 2013;Matsumura et al 2016;Takahashi et al 2002). The top1α-1 as2-1 and top1α-1 as1-1 double mutants were generated by crossing each single mutant.…”
Section: Plant Materials and Growth Conditionsmentioning
confidence: 99%