Journal
RUSSIAN JOURNAL OF PLANT PHYSIOLOGY
Volume 52, Issue 1, Pages 43-49Publisher
PLEIADES PUBLISHING INC
DOI: 10.1007/s11183-005-0007-8
Keywords
Zea mays; submerging stress; expression profile; microarray; metabolism; zinc finger-like protein
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The complete expression profile of maize has not yet been published, especially at the early submerging treatment. These early-response genes play key roles in regulating the expressions of late-response genes leading to morphological and metabolic adaptations. In this study, a cDNA microarray platform has been developed to investigate the early submerging stress responses. Transcriptional level of many genes was markedly altered after 2-h long submerging treatment. The expressions of 32 cDNA clones, which represent 24 non-redundant genes, were more than threefold upregulated or downregulated under submerging stress as compared to their expression under nonsubmerged control conditions. Early-responsive to submergence genes are involved in signal transduction, glycolysis, photosynthesis, transcription and translation, and lipid and energy metabolic pathways. A full-length cDNA coined ZmZF (AY515607) was cloned from maize. Sequence analysis showed that ZmZF shares high homology with zinc finger-like proteins. In addition, expression of SKP1/ASK1-like protein and 20S proteasome subunit alpha-3 increased significantly after 2-h low-oxygen stress. Based on their expression pattern and function, we hypothesize that regulatory mechanisms at the translation level also play a crucial role in low-oxygen response at early submergence.
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