Bibliothek

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
Filter
  • 1980-1984  (2)
Datenquelle
Materialart
Erscheinungszeitraum
Jahr
  • 1
    Digitale Medien
    Digitale Medien
    Histopathological changes in susceptible corn inoculated with Helminthosporium maydis race O (1982)
    Springer
    Mycopathologia 77 (1982), S. 75-82 
    Details
    ISSN: 1573-0832
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Seedlings of a susceptible inbred line of male-fertile corn were inoculated with conidia of Helminthosporium maydis race O. Histological and ultrastructural observations of mesophyll, bundle sheath and phloem were made over a period of 8 days. Histological observations at 1 day revealed that lesions were comprised of several dead mesophyll cells bordered by a pair of vascular bundles. By 3 days lesions had developed their characteristic appearance caused by mesophyll collapse and had increased to a width of 10–12 bundles. At the ultrastructural level, the first signs of mesophyll cell change were rupture of the tonoplast and swelling of the mitochondrial matrix followed by a disintegration of the cytoplasm and swelling of the chloroplast stroma. Following these changes the cytoplasm became filled with an electron dense material and the plasmalemma ruptured leaving only partial remnants of chloroplasts as recognizable organelles. All of these changes occurred by 1 day. Bundle sheath cells were more resistant and intact cells could be observed in 3-day-old lesions. Phloem showed signs of degeneration by 1 day with distortion of the sieve-tube element membranes and disintegration of the companion cell cytoplasm. By 4 days the phloem had disintegrated.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00437387
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    Histopathological changes in resistant (rhm) corn inoculated with Helminthosporium maydis race O (1982)
    Springer
    Mycopathologia 77 (1982), S. 83-88 
    Details
    ISSN: 1573-0832
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract Seedlings of an inbred line of male-fertile corn possessing the gene rhm for resistance to Southern corn leaf blight were inoculated with conidia of Helminthosporium maydis race O. Histological observations at 1 day revealed that lesions were comprised of several dead mesophyll cells bordered by a pair of vascular bundles. By 4 days, lesions had only spread to a width of three vascular bundles. Ultrastructural observations revealed that although mesophyll cells degenerated at an early stage, bundle sheath and phloem cells remained intact even in 4-day-old lesions. It appears that the gene rhm imparts a resistance to bundle sheath and phloem cells against toxic substances released by the fungus. Addition key words: Zea mays L., ultrastructure, gene rhm, Southern corn leaf blight.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00437388
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...