1994
DOI: 10.2307/3869904
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LEAFY COTYLEDON1 Is an Essential Regulator of Late Embryogenesis and Cotyledon Identity in Arabidopsis

Abstract: LEAFY COTYLEDON1 (LEC1) is an embryo defective mutation that affects cotyledon identity in Arabidopsis. Mutant cotyledons possess trichomes that are normally a leaf trait in Arabidopsis, and the cellular organization of these organs is intermediate between that of cotyledons and leaves from wild-type plants. We present several lines of evidence that indicate that the control of late embryogenesis is compromised by the mutation. First, mutant embryos are desiccation intolerant, yet embryos can be rescued before… Show more

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Cited by 150 publications
(157 citation statements)
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“…LEC1, which encodes subunit B9 of a nuclear factor Y protein (NF‐YB9), and the B3 domain protein LEC2 are part of a larger network of “LAFL” proteins (for L EC1/LEC1‐LIKE [L1L], A BSCISIC ACID [ABA] INSENSITIVE 3 [ABI3], F USCA3 [FUS3] and L EC2) that regulate embryo identity and maturation (Jia, McCarty, & Suzuki, 2013). Loss‐of‐function mutations in LAFL genes result in defects in cotyledon development, storage macromolecule accumulation, and desiccation tolerance in zygotic embryos (Keith, Kraml, Dengler, & McCourt, 1994; Meinke, Franzmann, Nickle, & Yeung, 1994; Parcy, Valon, Kohara, Misera, & Giraudat, 1997; Stone et al., 2001; West et al., 1994). In contrast, ectopic expression of LEC1 and LEC2 induces somatic embryo formation on the cotyledons and leaves of arabidopsis seedlings (Lotan et al., 1998; Stone et al., 2001).…”
Section: A Network Of Arabidopsis Transcription Factors Controls Somamentioning
confidence: 99%
“…LEC1, which encodes subunit B9 of a nuclear factor Y protein (NF‐YB9), and the B3 domain protein LEC2 are part of a larger network of “LAFL” proteins (for L EC1/LEC1‐LIKE [L1L], A BSCISIC ACID [ABA] INSENSITIVE 3 [ABI3], F USCA3 [FUS3] and L EC2) that regulate embryo identity and maturation (Jia, McCarty, & Suzuki, 2013). Loss‐of‐function mutations in LAFL genes result in defects in cotyledon development, storage macromolecule accumulation, and desiccation tolerance in zygotic embryos (Keith, Kraml, Dengler, & McCourt, 1994; Meinke, Franzmann, Nickle, & Yeung, 1994; Parcy, Valon, Kohara, Misera, & Giraudat, 1997; Stone et al., 2001; West et al., 1994). In contrast, ectopic expression of LEC1 and LEC2 induces somatic embryo formation on the cotyledons and leaves of arabidopsis seedlings (Lotan et al., 1998; Stone et al., 2001).…”
Section: A Network Of Arabidopsis Transcription Factors Controls Somamentioning
confidence: 99%
“…1). Similarly, the leafy cotyledon1-2 mutation in Arabidopsis causes plants to express germination-specific genes without completely suppressing the expression of a storage protein gene that is normally expressed during the maturation phase of embryogenesis (5). Conversely, the raspberry mutant of Arabidopsis thaliana is blocked at a globular stage of embryogenesis, but expresses genes that are normally activated much later (6).…”
mentioning
confidence: 99%
“…The Arabidopsis LEAFY COTYLEDON1 (LEC1) gene is expressed during embryogenesis, and its expression pattern is similar in both zygotic and somatic embryos (16)(17)(18). Loss-of-function mutation of LEC1 results in embryos that do not undergo developmental arrest and are nonviable because they are desiccation-intolerant (19)(20)(21)(22)(23). Ectopic expression of LEC1 in transgenic plants induces somatic embryos in vegetative cells (16).…”
mentioning
confidence: 99%
“…FUS3 is a LEC class gene that encodes a B3 domain protein (30,31). The Arabidopsis fus3 mutants resemble lec1 mutants morphologically (19,21,32), suggesting that both proteins regulate a common set of downstream genes (33). The KdFUS3 protein shares 64% identity with Arabidopsis FUS3.…”
mentioning
confidence: 99%
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