The Control of Pinna Morphology in Wildtype and Mutant Leaves of the Garden Pea (Pisum sativum L.)

Lü, Bin; Villani, Philip J.; Watson, John C.; Demason, T Darleen A.; Cooke, Todd J.

doi:10.1086/297388

Cited by 41 publications

(52 citation statements)

References 13 publications

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“…The resemblance of epidermal cell types present on tendrils and leaflets (Gerrath et al, 1999) and the ability to convert tendrils into leaflets by application of an inhibitor of polar auxin transport (Gould et al, 1991) suggest that tendrils represent leaflets modified by homeotic (Marx, 1983) or heterochronic (Lu et al, 1996) mutation. Thus, tendrils would be postulated to represent leaflets that have undergone an evolutionary loss of adaxial identity, and the tl mutant, which has leaflets in place of tendrils, would represent regained adaxial identity, allowing lamina formation.…”

Section: Tendril Formation In Peamentioning

confidence: 99%

The MutantcrispaReveals Multiple Roles forPHANTASTICAin Pea Compound Leaf Development

et al. 2005

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Pinnate compound leaves have laminae called leaflets distributed at intervals along an axis, the rachis, whereas simple leaves have a single lamina. In simple-and compound-leaved species, the PHANTASTICA (PHAN) gene is required for lamina formation. Antirrhinum majus mutants lacking a functional gene develop abaxialized, bladeless adult leaves. Transgenic downregulation of PHAN in the compound tomato (Solanum lycopersicum) leaf results in an abaxialized rachis without leaflets. The extent of PHAN gene expression was found to be correlated with leaf morphology in diverse compound-leaved species; pinnate leaves had a complete adaxial domain of PHAN gene expression, and peltate leaves had a diminished domain. These previous studies predict the form of a compound-leaved phan mutant to be either peltate or an abaxialized rachis. Here, we characterize crispa, a phan mutant in pea (Pisum sativum), and find that the compound leaf remains pinnate, with individual leaflets abaxialized, rather than the whole leaf. The mutant develops ectopic stipules on the petiole-rachis axis, which are associated with ectopic class 1 KNOTTED1-like homeobox (KNOX) gene expression, showing that the interaction between CRISPA and the KNOX gene PISUM SATIVUM KNOTTED2 specifies stipule boundaries. KNOX and CRISPA gene expression patterns indicate that the mechanism of pea leaf initiation is more like Arabidopsis thaliana than tomato.

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Section: Tendril Formation In Peamentioning

confidence: 99%

The MutantcrispaReveals Multiple Roles forPHANTASTICAin Pea Compound Leaf Development

et al. 2005

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“…During its initiation and early development, a leaf primordium divides into several more or less discrete domains along its dorsoventral, centrolateral, and proximodistal axes (Waites and Hudson, 1995;Harper and Freeling, 1996;Lu et al, 1996;Sylvester et al, 1996). The dorsoventral asymmetry of a leaf is apparent as soon as it emerges from the shoot meristem because the adaxial side of a leaf primordium is generally flatter than its abaxial surface.…”

Section: Developmental Domains In a Leafmentioning

confidence: 99%

Leaf morphogenesis in flowering plants.

1997

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“…af stp-4 plants had fewer primary and secondary ramifications typical of the af single mutant such that double mutant leaves typically consisted of simple tendrils arising from the central rachis ( Figure 4C). In contrast, afila (af Stp) leaves bear compound proximal tendrils and simple tendrils distally (Lu et al, 1996). However, effects of stp-4 on leaf development were most pronounced in the double mutant af tl (pleiofila) leaf form ( Figure 4E).…”

Section: Interaction Between Leaf Homeotic Mutants and Stpmentioning

confidence: 99%

Stamina pistilloida, the Pea Ortholog of Fim and UFO, Is Required for Normal Development of Flowers, Inflorescences, and Leaves

2001

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Isolation and characterization of two severe alleles at the Stamina pistilloida ( Stp ) locus reveals that Stp is involved in a wide range of developmental processes in the garden pea. The most severe allele, stp-4 , results in flowers consisting almost entirely of sepals and carpels. Production of ectopic secondary flowers in stp-4 plants suggests that Stp is involved in specifying floral meristem identity in pea. The stp mutations also reduce the complexity of the compound pea leaf, and primary inflorescences often terminate prematurely in an aberrant sepaloid flower. In addition, stp mutants were shorter than their wild-type siblings due to a reduction in cell number in their internodes. Fewer cells were also found in the epidermis of the leaf rachis of stp mutants. Examination of the effects of stp-4 in double mutant combinations with af , tl , det , and veg2-2 -mutations known to influence leaf, inflorescence, and flower development in peasuggests that Stp function is independent of these genes. A synergistic interaction between weak mutant alleles at Stp and Uni indicated that these two genes act together, possibly to regulate primordial growth. Molecular analysis revealed that Stp is the pea homolog of the Antirrhinum gene Fimbriata ( Fim ) and of UNUSUAL FLORAL ORGANS ( UFO ) from Arabidopsis. Differences between Fim / UFO and Stp mutant phenotypes and expression patterns suggest that expansion of Stp activity into the leaf was an important step during evolution of the compound leaf in the garden pea.

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The Control of Pinna Morphology in Wildtype and Mutant Leaves of the Garden Pea (Pisum sativum L.)

Cited by 41 publications

References 13 publications

The MutantcrispaReveals Multiple Roles forPHANTASTICAin Pea Compound Leaf Development

The MutantcrispaReveals Multiple Roles forPHANTASTICAin Pea Compound Leaf Development

Leaf morphogenesis in flowering plants.

Stamina pistilloida, the Pea Ortholog of Fim and UFO, Is Required for Normal Development of Flowers, Inflorescences, and Leaves

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