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  • maize  (37)
  • Springer  (37)
  • American Physical Society (APS)
  • Institute of Physics
  • Periodicals Archive Online (PAO)
  • 1990-1994  (37)
  • 1991  (37)
Collection
Keywords
Publisher
  • Springer  (37)
  • American Physical Society (APS)
  • Institute of Physics
  • Periodicals Archive Online (PAO)
Years
  • 1990-1994  (37)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Oviposition by the African migratory locust, Locusta migratoria migratorioides, in a crop environment in South Africa (1991)
    Springer
    Entomologia experimentalis et applicata 61 (1991), S. 169-177 
    Details
    ISSN: 1570-7458
    Keywords: African migratory locust ; crop environment ; oviposition behaviour ; oviposition sites ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Oviposition by the African migratory locust, Locusta migratoria migratorioides (Orthoptera: Acrididae), was studied in maize and wheat crops on the Orange Free State Highveld. Maize was shown to be the most important oviposition habitat with peak laying taking place in autumn and early winter when highest pod densities were recorded. Laying was mainly concentrated along the middle of the crop interrows in maize and within clearings in the wheat crop. Despite the uniform layout of these crops, the distribution of egg pods was found to be aggregated. Non-reproductive behaviour, such as locust aggregation, basking and feeding, as well as environmental factors appeared to influence the distribution of egg pods in these crops. Secondary selection for optinum soil moisture and compaction on the laying site enhanced the aggregation of pods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00191747
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  • 2
    Electronic Resource
    Electronic Resource
    Mycotoxin production by Fusarium species isolated from New Zealand maize fields (1991)
    Springer
    Mycopathologia 113 (1991), S. 35-40 
    Details
    ISSN: 1573-0832
    Keywords: Fusarium ; maize ; moniliformin ; mycotoxins ; trichothecenes ; zearalenone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Forty Fusarium isolates obtained from maize fields were screened for moniliformin production on maize kernels. Twelve isolates, including seven of F. subglutinans, were found to produce moniliformin at levels ranging from 0.4 to 64 ppm. Twenty six isolates were also screened for production of deoxynivalenol, diacetoxyscirpenol, T-2 toxin and zearalenone. Of these, 22, including all 11 isolates of F. graminearum, produced zearalenone at levels ranging from 0.1 to 96.0 ppm, while 13 produced T-2 toxin at low levels, (〈1.1 ppm). Deoxynivalenol and diacetoxyscirpenol were each produced by six isolates, also at low levels (〈1.0 ppm). Three isolates of F. graminearum and one of F. sambucinum produced four toxins simultaneously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00436385
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  • 3
    Electronic Resource
    Electronic Resource
    A maize gene expressed during embryogenesis is abscisic acid-inducible and highly conserved (1991)
    Springer
    Plant molecular biology 16 (1991), S. 919-923 
    Details
    ISSN: 1573-5028
    Keywords: Zea mays ; maize ; embryogenesis ; abscisic acid ; seed maturation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have isolated by differential hybridization a cDNA, termed Emb564, which is complementary to an 800 nt embryo-specific transcript in Zea mays. The expression of Emb564 can be enhanced by exogenous abscisic acid (ABA) and the effect of ABA on the accumulation of Emb564 transcript appears to be confined to embryos at the early and mid embryonic stages. In addition, Emb564 is expressed at low levels in ABA-deficient but not in ABA non-responsive embryos. Genomic analysis suggested that the Emb564 mRNA is encoded by a single gene. Sequence analysis showed that Emb564 exhibits extensive similarities with several known ABA-inducible genes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015086
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  • 4
    Electronic Resource
    Electronic Resource
    Nucleotide sequence of ‘repeat-2’ of the mitochondrial DNA from the maize N-cytoplasm (1991)
    Springer
    Plant molecular biology 16 (1991), S. 935-936 
    Details
    ISSN: 1573-5028
    Keywords: maize ; mitochondrial DNA ; repeated sequence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015089
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization of the maize pyruvate decarboxylase gene (1991)
    Springer
    Plant molecular biology 17 (1991), S. 1259-1261 
    Details
    ISSN: 1573-5028
    Keywords: anaerobic genes ; maize ; pyruvate decarboxylase ; DNA sequence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028743
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  • 6
    Electronic Resource
    Electronic Resource
    Characterization of a maize cDNA that complements an enolase-deficient mutant of Escherichia coli (1991)
    Springer
    Plant molecular biology 16 (1991), S. 787-795 
    Details
    ISSN: 1573-5028
    Keywords: anaerobic stress ; enolase ; gene regulation ; maize
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A cDNA encoding maize enolase (2-phospho-D-glycerate hydrolase) was purified by functional genetic complementation using an enolase deficient mutant of Escherichia coli, DF261. This cDNA, pZM245, was characterized by restriction mapping and DNA sequence analysis. The cDNA contained an open reading frame encoding a protein of 446 amino acids with a high degree of similarity to enolase sequences from other organisms (72% identity to yeast enolase and 82% identity to human enolase). The pZM245 contains a correctly positioned consensus prokaryotic translation initiation sequence. The specific activity of enolase in maize increases to about twice its initial level after 48 hours of anaerobiosis. Northern-blot analysis showed a five-fold anaerobic induction in enolase mRNA, while heat shock or cold shock increased enolase mRNA levels only slightly. Southern-blot analysis of maize genomic DNA indicated that there is one copy of the pZM245 hybridizing sequence per haploid genome in maize.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00015071
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  • 7
    Electronic Resource
    Electronic Resource
    Characterization of pollen polygalacturonase encoded by several cDNA clones in maize (1991)
    Springer
    Plant molecular biology 17 (1991), S. 1155-1164 
    Details
    ISSN: 1573-5028
    Keywords: cDNA family ; maize ; pollen-expressed genes ; polygalacturonase ; signal peptide
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A full-length cDNA clone, named PG1, abundantly expressed in late stages of pollen development, has been isolated from a cDNA library using a differential screening method with cDNA probes representative of microspores at early or late developmental stages. The encoded 410 amino acid polypeptide has significant homology with various polygalacturonases (PG) described elsewhere. Two polypeptides, of 49 and 53 kDa respectively, have been identified in the active PG fraction, isolated from mature pollen by immuno-cross-reaction with tomato PG antibodies. According to their N-terminal sequence, they can be identified as being mature peptides encoded by the PG1 cDNA clone. We propose that these two proteins derive from a unique precursor through several post-translational events, including the excision of a 22 amino-terminal signal peptide and glycosylation. PG-encoding genes form a small genomic family. Sequence analysis of three PG cDNA clones shows that they are closely related. The divergence of nucleotides between these three cDNA clones is 1%. They encode the same product.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00028732
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  • 8
    Electronic Resource
    Electronic Resource
    Organ-specific expression of different histone H3 and H4 gene subfamilies in developing and adult maize (1991)
    Springer
    Plant molecular biology 17 (1991), S. 935-940 
    Details
    ISSN: 1573-5028
    Keywords: expression ; germination ; histone genes ; maize ; subfamilies ; tissues
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The steady-state levels of H3 and H4 mRNAs transcribed from three H3 and two H4 multigene subfamilies were studied during germination and in different organs of maize. During germination the five subfamilies are expressed in parallel to DNA synthesis, but a 5-fold difference in the quantity of mRNAs transcribed per gene copy was found from our subfamily to another. In adult plants H3 and H4 mRNA levels are highest in organs containing meristematic tissues but also high in non-proliferating tissues. No strict tissue specificity expression could be detected but some subfamilies show preferential expression in some tissues.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00037077
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  • 9
    Electronic Resource
    Electronic Resource
    A gene coding for a basic pathogenesis-related (PR-like) protein from Zea mays. Molecular cloning and induction by a fungus (Fusarium moniliforme) in germinating maize seeds (1991)
    Springer
    Plant molecular biology 16 (1991), S. 527-536 
    Details
    ISSN: 1573-5028
    Keywords: germination ; fungi ; maize ; pathogenesis-related ; seed
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Pathogenesis-related proteins (PRs) are plant proteins produced in leaves in response to infection by pathogens including viruses, viroids, fungi and bacteria. Information on the presence and/or expression of PRs in monocotyledonous plants is scarce. Here we report the identification of cDNA and genomic clones coding for a basic form of a protein from germinating maize seeds having a high homology with the group of PR-1 from tobacco. A cDNA library enriched in aleurone-specific sequences was prepared from maize seeds two days after germination. One clone was found to contain an open reading frame encoding a protein homologous to PR proteins from tomato (p14) and tobacco (PR-1 group). Sequence analysis of the corresponding genomic clone revealed that it was encoded by a single exon. Besides, DNA blot hybridization indicates that this PR-like protein is encoded by a single-copy gene in maize. The accumulation of its mRNA increases after rehydration of desiccated seeds. Furthermore, a relationship was found between its expression and infection by a natural pathogen of maize, the fungus Fusarium moniliforme. The possible role of this protein as a response mechanism following fungal infection in cereal seeds is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023419
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  • 10
    Electronic Resource
    Electronic Resource
    Sequence, identification and characterization of cDNAs encoding two different members of the 18 kDa heat shock family of Zea mays L. (1991)
    Springer
    Plant molecular biology 16 (1991), S. 699-711 
    Details
    ISSN: 1573-5028
    Keywords: heat shock ; heat shock cDNAs ; maize ; small heat shock proteins
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Heat-shocked maize seedlings (cv. Oh43) synthesize a characteristic set of heat-shock proteins (hsps) which include an 18 kDa family containing at least six major isoelectric variants. A cDNA library was constructed from poly(A)+ RNAs isolated from the radicles of heat-shocked maize seedlings and screened with a DNA fragment from the theoretical open reading frame of a putative Black Mexican Sweet maize hsp 18 genomic clone. Two clones, cMHSP18-3 and cMHSP18-9, were isolated, and the RNA transcripts generated from them were translated into proteins which immunoreact with antibodies directed against the maize 18 kDa hsps and exhibit the same electrophoretic characteristics as two different members of the 18 kDa hsp family. Nucleotide sequence analyses of the cDNAs in these clones reveal that their 5′ and 3′ untranslated regions exhibit 33–34% identity and that their protein encoding regions share 93% identity. The deduced amino acid sequences of these clones show 90% identity, and the apparent molecular masses and isoelectric points of these proteins agree with those established for two different 18 kDa hsps, numbered 3 and 6. This report substantiates that at least two of the 18 kDa hsps in maize are products of different but related genes. Moreover, it establishes that transcripts for these proteins accumulate during heat shock and that both their nucleotide and deduced amino acid sequences share extensive similarities with the class VI small hsps in soybean and with transcripts expressed during meiosis in Lilium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00023434
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