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Proteome analysis of rice uppermost internodes at the milky stage
Author(s) -
Yang Pingfang,
Liang Yu,
Shen Shihua,
Kuang Tingyun
Publication year - 2006
Publication title -
proteomics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.26
H-Index - 167
eISSN - 1615-9861
pISSN - 1615-9853
DOI - 10.1002/pmic.200500260
Subject(s) - proteome , biology , plant stem , computational biology , botany , bioinformatics
Uppermost internodes, which connect the part between the ear and lower stem, form an important pathway transporting mineral nutrition from roots and photosynthates from leaves (especially the flag leaf) to the ear. The milky stage is the first stage of seed ripening. The uppermost internodes of rice at the milky stage are critical for seed quality and yield. Total soluble proteins of the uppermost internodes of rice ( Oryza sativa L. ssp. indica ) at the milky stage were analyzed using proteomic methods. Using 2‐DE, 762 reproducible protein spots were detected. Among them, 132 abundant proteins were analyzed using MALDI‐TOF‐MS. Searching in the National Center for Biotechnology Information database, we could identify 98 proteins, which represent 80 gene products. These proteins belong to 11 functional groups with energy production‐associated proteins in the first place. The large accumulation of proteins involved in metabolism, signaling, and stress resistance indicated that the uppermost internodes of rice have a high physiological and stress‐resistant activity. In addition, our results will also enrich the database of the rice proteome.