التفاصيل البيبلوغرافية
| العنوان: |
Molecular cytogenetic identification of a wheat- Aegilops geniculata Roth spontaneous chromosome substitution and its effects on the growth and physiological responses of seedlings to osmotic stress. |
| المؤلفون: |
Landjeva, Svetlana, Kocheva, Konstantina, Karceva, Tania, Sepsi, Adél, Molnár, István, Schneider, Annamária, Ganeva, Ganka, Georgiev, Georgi, Molnár‐Láng, Márta |
| المصدر: |
Plant Breeding; Feb2012, Vol. 131 Issue 1, p81-87, 7p |
| مصطلحات موضوعية: |
SEED morphology, KARYOTYPES, POLYETHYLENE glycol, MALONDIALDEHYDE, CYTOGENETICS, AEGILOPS, IN situ hybridization |
| مستخلص: |
With 6 figures and 1 table Abstract The karyotypic constitution of a wheat- Aegilops geniculata 2Mg(2A) disomic substitution line, isolated from backcross progenies of a wheat- Ae. geniculata amphiploid, was determined using multicolour fluorescence in situ hybridization and genomic in situ hybridization. The ability of the 2Mg chromosome to compensate for wheat chromosome 2A was studied in relation to phenotypic traits and the growth and physiological responses of seedlings to polyethylene glycol (PEG)-induced osmotic stress. Plants of the substitution line had altered spike and seed morphologies, increased tillering, moderately reduced productivity and maintained better seedling growth in stress conditions. PEG treatment caused severe stress, resulting in considerable water loss from the leaves. Under this stress, the substitution line retained better leaf water status and suffered less oxidative damage than the wheat parent, as indicated by higher relative water content and lower malondialdehyde accumulation. These changes were consistent with more sustained membrane stability in the substitution line, evidenced by the lower value of the membrane injury index and the less-prominent increase in ion efflux from the apoplast. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
