Effects of chilling on the root cell ultrastructure of two soybean cultivars
2009
Glinska, S.,University of Lodz (Poland). Lab. of Electron Microscopy | Gapinska, M.,University of Lodz (Poland). Lab. of Electron Microscopy | Gabara, B.,University of Lodz (Poland). Lab. of Electron Microscopy | Mikicinski, A.,University of Lodz (Poland). Lab. of Electron Microscopy | Szafranska, K.,University of Lodz (Poland). Dept. of Ecophysiology and Plant Development
Two soybean cultivars, Aldana (more resistant) and Essor (less resistant to low temperature), were subjected to chilling at 5 deg C for 24 h, and then the ultrastructure of the root meristem cells was investigated. The ultrastructure of control root cells of the tested cultivars differed in the number of condensed mitochondria, plastids with phytoferritin, deformed vacuoles, as well as multivesicular bodies (MB) in cytoplasm and vacuoles. Chilling induced concentric endoplasmic reticulum arrangement in both soybean cultivars, while the circular Golgi apparatus occurred only in cv. Essor and MB in the cytoplasm of cv. Aldana cells. Additionally, in cv. Aldana chilling increased the number of condensed mitochondria, MB in vacuoles and multilamellar structures (MS) in cytoplasm, whereas in cv. Essor it enlarged the population of plastids with phytoferritin and the number of MB in cytoplasm. After chilling the population of deformed vacuoles with phenolic compounds in the form of electron dense granules increased but the number of MS in the vacuoles of both cultivars decreased. The ultrastructural changes induced by the chilling stress were not lethal but rather adaptive, especially in more resistant cv. Aldana.
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