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  • 1
    Electronic Resource
    Electronic Resource
    Cryopreservation of immature maize embryos after freeze-hardening in the ear and in vitro
    Amsterdam : Elsevier
    Plant Science 60 (1989), S. 129-136 
    Details
    ISSN: 0168-9452
    Keywords: Zea mays ; cryopreservation ; embryo ; freeze-hardening ; water stress
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-9452(89)90053-8
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  • 2
    Electronic Resource
    Electronic Resource
    New lights in early steps of in vitro fertilization in plants (1996)
    Springer
    Sexual plant reproduction 9 (1996), S. 324-329 
    Details
    ISSN: 1432-2145
    Keywords: Key words In vitro fertilization ; Gamete recognition ; Gamete fusion ; Egg activation ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  Studies using in vitro fertilization systems in animals and lower plants have led to a better understanding of the initial steps of fertilization and their underlying mechanisms. These mechanisms remain to be elucidated in flowering plants. Recent progress related to the development of in vitro fertilization systems using maize as a plant model is presented in this review. Their potential for leading to a better understanding of the process of gametic recognition and fusion and of the early events triggering egg activation and zygote formation are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004970050050
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  • 3
    Electronic Resource
    Electronic Resource
    Deleterious effect of minimal enzymatic treatments on the development of isolated maize embryo sacs in culture (1995)
    Springer
    Sexual plant reproduction 8 (1995), S. 313-317 
    Details
    ISSN: 1432-2145
    Keywords: Embryo sac ; Zea mays ; Enzymatic isolation ; Zygotic embryogenesis ; Microinjection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The long-term viability of isolated embryo sacs was studied in maize. Fertilised embryo sacs were digested in order to remove most of the nucellus cells present on their surfaces and then transferred to culture. Experiments on 161 embryo sacs showed that isolation treatments using even minimal enzymatic digestion affected the further development of the embryo sacs. Few embryo sacs survived in culture and those produced only abnormal embryos; they produced no plants. We concluded that embryo sacs isolated through enzymatic digestion may offer limited prospects for long-term studies where normal embryogenic development is required. Alternative strategies are discussed for maize.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229389
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  • 4
    Electronic Resource
    Electronic Resource
    New lights in early steps of in vitro fertilization in plants (1996)
    Springer
    Sexual plant reproduction 9 (1996), S. 324-329 
    Details
    ISSN: 1432-2145
    Keywords: In vitro fertilization ; Gamete recognition ; Gamete fusion ; Egg activation ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Studies using in vitro fertilization systems in animals and lower plants have led to a better understanding of the initial steps of fertilization and their underlying mechanisms. These mechanisms remain to be elucidated in flowering plants. Recent progress related to the development of in vitro fertilization systems using maize as a plant model is presented in this review. Their potential for leading to a better understanding of the process of gametic recognition and fusion and of the early events triggering egg activation and zygote formation are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02441950
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  • 5
    Electronic Resource
    Electronic Resource
    Analysis of the cytosolic hsp70 gene family inZea mays (1994)
    Springer
    Plant molecular biology 25 (1994), S. 909-916 
    Details
    ISSN: 1573-5028
    Keywords: heat shock 70 kDa protein ; multigene family ; polymerase chain reaction ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In this study we have analysed the multigene family coding for the cytoplasmic heat shock 70 kDa proteins (hsp70) inZea mays. Fully degenerate primers were used in a polymerase chain reaction (PCR) to amplify selected regions of the hsp70 genes. Sequence and Southern blot analysis reveals that at least three highly conserved genes exist in maize. In addition, amplification reveals the presence of a conserved intron in all genes examined. Expression analysis shows that the hsp70 genes studied represent members of the inducible and constitutive families. The results obtained may indicate that there are subfamilies of cytoplasmic hsp70 genes expressed in higher plants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028885
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  • 6
    Electronic Resource
    Electronic Resource
    PCR-generated cDNA library of transition-stage maize embryos: cloning and expression of calmodulin genes during early embryogenesis (1995)
    Springer
    Plant molecular biology 27 (1995), S. 105-113 
    Details
    ISSN: 1573-5028
    Keywords: calmodulin ; cDNA library ; embryogenesis ; PCR ; transition stage ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract One hundred maize zygotic embryos microdissected at the transition stage were used to construct a cDNA library after non-selective PCR (NS-PCR) amplification of whole cDNA populations. The library contains 2.3 × 105 recombinants and two different calmodulin cDNAs were cloned using a heterologous probe from petunia. Calmodulin expression was confirmed throughout maize embryogenesis at the mRNA, amplified cDNA and protein levels. Sequence analysis suggests a maize origin for both clones and negligible nucleotide changes linked to PCR. This library is the first described for early plant embryos and represents a breakthrough to isolate genes involved in embryo differentiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00019182
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  • 7
    Electronic Resource
    Electronic Resource
    From in vitro fertilization to early embryogenesis in maize (1995)
    Springer
    Protoplasma 187 (1995), S. 3-12 
    Details
    ISSN: 1615-6102
    Keywords: Gamete protoplasts ; In vitro fertilization ; Early embryogenesis ; Developmental mutations ; Polymerase chain reaction ; cDNA libraries ; Gene cloning ; Angiosperm ; Zea mays
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The development of in vitro fertilization methods in plants, the characterization of developmental mutants, and the adaptation of molecular biology techniques to construct cDNA libraries from minute samples, all represent important recent technical break-throughs. They allow the study of fertilization and early embryogenesis at a molecular level and considerable improvement in the under-standing of higher plant reproduction can be predicted over the next few years. Important biological questions, such as polyspermy, gamete fusion physiology, asymmetrical cell division, embryo axis formation, can now be addressed experimentally in maize, which appears as a major study model in this area.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01280227
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